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Old 05-18-2009, 05:45 PM   #1
BadBlownMotor
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Default Custom building a 4-53 Street Blower

For New Readers Of This Thread:

I want to let all of you new comers to this thread that the blower unit featured here is actually a 6v53 long bore and not a 4-53 short bore. Sorry for the misinformation. However, the information should prove useful to all 53 series Detroit Diesel blowers.

Thanks, BadBlownMotor


Hi guys. I just thought I would share this custom build of a 6v53 blower. I was originally going to put this on a SBC. I'm now thinking even more vintage. How about putting this on a 1955 291 Desoto Hemi? All parts are designed and machined by me.


Last edited by BadBlownMotor; 07-13-2009 at 03:40 PM. Reason: Updating this thread with correct information.
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Old 05-18-2009, 05:59 PM   #2
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Default Re: Custom building a 4-53 Street Blower

Here's another picture of the new billet aluminum rotors being CNC milled. The photo immediately below is showing the rotor shaft holes being bored. The last photo shows the rotor contour being machined. The rotor profile was digitized on a CMM and then imported and tweaked in SurfCAM.


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Old 05-18-2009, 06:41 PM   #3
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Default Re: Custom building a 4-53 Street Blower

Here is another photo of the new rotors.

The rotor bores will now accept new 4150 moly steel shafts at a 25mm diameter thru the rotors and 22mm at each end for the bearings. The shoulders at each end will help eliminate rotor shaft walk. There will be a ground thrust washer at the rear which locks the shafts to inner race of the rear bearing for added insurance.

The rotors are still a bit heavy at the moment. I will be taking some more meat out of the lightening holes...


Last edited by BadBlownMotor; 05-19-2009 at 05:22 PM. Reason: grammer
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Old 05-18-2009, 08:35 PM   #4
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Default Re: Custom building a 4-53 Street Blower

I dig it! Home made blowers for everyone!
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Old 05-19-2009, 05:13 PM   #5
BadBlownMotor
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Default Re: Custom building a 4-53 Street Blower

Thanks for the enthusiasm, Death Trap Man. Most people wounldn't consider the 4-53 blower as being worthy because of the amount of fab work involved. I decided to do it anyways because I have the knowledge and access to the machinery and tooling. I also like the fact that it is a low profile unit like the Weiand and B&M units, but at a much cheaper cost than actually using either of those. Also, it will be totally custom and built for a 291 Desoto Hemi complete with intake and old v-belt drive system. How nostalgic is that?

I plan on overdriving the 4-53 to about 40 or 50 percent. This should yield about 6 to 8 psi of boost, hopefully. That should be plenty for the little 291 Desoto.

I am keeping detailed records of this build, which will include drawings, CNC code, parts and materials lists for anyone that is interested in tackling a build like this. I will keep you posted in the future here.

Here are some pictures of a fixture I built to check the clearances of both the old and new rotors.

Last edited by BadBlownMotor; 05-19-2009 at 05:24 PM. Reason: grammer
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Old 05-19-2009, 05:28 PM   #6
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Default Re: Custom building a 4-53 Street Blower

Quote:
Originally Posted by death trap man View Post
I dig it! Home made blowers for everyone!
LOL My favorite post ever!

BadBlownMotor, you have my utmost respect. Good luck, and please keep us posted.
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Old 05-19-2009, 07:08 PM   #7
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Default Re: Custom building a 4-53 Street Blower

Thanks Mo. I will try to keep you posted on the progress...

Just a little tech info:

This build is going to be composed of mostly new parts other than the 6v53's original case and gears. I don't want to go over-board on the build. Just to make a new case would require a lot of time and money.
However, a billet case would be awsome though!

I just simply checked the case and gears for any defects that could cause a catastrophic failure. This requires cleaning and sand blasting of the parts.

The 6v53's Case:

A visual inspection was made to check for warpage, cracks, and bad porousity. Except for some minor porousity, I found the case to be in exellent condition. I then proceeded to check the case for square and
parallel. The front and back were less than .001 of inch parallel to each other and square to the bottom. The top was out about .0025 thousandths of inch out of square to the bottom. The top doesn't have to be absolutely square because that's where the carberator plate will be going. So, the .0025 out of square is acceptable.

After the case passed all my inspections, I redrilled and tapped all mounting holes to accept stainless re-coil thread inserts. This proceedure does a couple of things. Firstly, it provides a more durable threaded hole for future rebuilds. Secondly, it provides a certain amount of thread strength for the fasteners going into the holes. No thread corrosion here either! In fact, almost all of the parts (both new and reconditioned) that require screws or bolts have these inserts installed in them.

The alignment dowels in the case for the bearing plates where resized to fit a standard 3/8 dowel as a press fit. They were actually an odd size of .370 inch prior to doing this. I will be using pull type dowels for this application.

I carefully ported both the inlet and outlet side of the case. This porting of the holes allows the unit to flow slightly better than stock. The porting also squares and matches the holes as well. If you plan to build a unit like this yourself, becareful not to over do it with the porting. If you go past the center-line of your rotors towards the sides of the case, you will actually decrease the swept volume per revolution of the blower. We don't want that do we?

The Gears:

Since the gears were in perfect condition, I just cleaned and re-black oxided them to like new condition. I may have to open up or change the mounting holes on the driven gear to accept the new drive coupler later.

Here's a font view of the case showing the bores:


Last edited by BadBlownMotor; 07-13-2009 at 03:32 PM.
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Old 05-21-2009, 11:46 AM   #8
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Default Re: Custom building a 4-53 Street Blower

I will be resuming work on this project at the end of next week...

I will be finishing the front and rear bearing plates, which will require drilling, tapping, and reaming the mounting holes for the carberator plate and the intake manifold. I plan to make two different carberator plates; one for single carb, and the other for dual carb.

I will also be rough turning and O.D. grinding the rotor shafts so I can get them shipped out for splining for the gears.

The rotors still need some attention. I still have to lighten them up a bit and machine the pin holes which will lock the rotors to the shafts. I plan to use dual 5/16 locking pins with a #10 alloy flat-head screw and thread locking compound to do the job on each rotor. (I will provide a photo later once this is done.)

After this point, all of the critical stuff will be finished. I will be machining the front cover which will accept a pressure relief valve, sight glass for oil fill level, and an "off the shelf" snout and drive assembly. The snout will be determined once I have a completed intake manifold ready for the 291 Desoto.
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Old 05-21-2009, 04:36 PM   #9
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Default Re: Custom building a 4-53 Street Blower

unbelievable , some awesome work there , making rotors very coool more photos , and show the blower on the hemi when it s done ,
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Old 05-22-2009, 11:47 AM   #10
Harry Bergeron
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Default Re: Custom building a 4-53 Street Blower

What CMM did you use?
What would it usually cost to CCM these and get the numbers in CNC format?
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Old 05-26-2009, 06:32 PM   #11
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Default Re: Custom building a 4-53 Street Blower

The CMM that was used is made by Kemco. It was rebuilt, updated, and calibrated by CMM Technology, Inc. (www.cmmtechnology.com)

I'm not sure about cost because it was done in the shop where I work for free. I can get a ball park quote if you want it.

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Old 05-26-2009, 07:11 PM   #12
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Default Re: Custom building a 4-53 Street Blower

Those are amazing machines, but I've never had any clue about what it costs to use one.

I'm looking to CMM a 1/18 scale model car so I can blow it up to 1/4 scale or full scale on a CNC wood router.

Thanks, I'd love to know what it costs to capture the numbers.
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Old 05-26-2009, 07:16 PM   #13
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Default Re: Custom building a 4-53 Street Blower

WOW, You got skills to pay the BILLS.
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Old 05-26-2009, 07:17 PM   #14
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Default Re: Custom building a 4-53 Street Blower

WOW that looks good



where in MI are you? I'm in canton and I'm looking to have some machine work done if you do stuff off hours
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Old 05-26-2009, 08:47 PM   #15
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Default Re: Custom building a 4-53 Street Blower

Depending on the size of the part in question, you may have to break up your CNC files into chunks. This all depends on the level of detail in the geometry and how much memory your CNC machine has to store the G-Code. You will also need to know what the tool sizes are in both length and diameter. Of course, a lot of this can be determined in the CAD/CAM software.

We predominately use SurfCAM to output the required code in our shop. The problem is that SurfCAM will generate point to point moves across a surface in the XZ or YZ plane, which can generate a lot of code. It doesn't make use of subroutining. Sometimes that's a good thing and sometime it's not. Simple but repetative geometry definitely benefits from making use of subroutines. You can repeat a block X amount of times without really running out of CNC memory that way. Complex parts require breaking up the code in most cases unless memory isn't a factor.

In my case with the rotors, I just needed all of the line/arc points along the profile. The profile was sampled on the CMM in 1 mm increments. The data was then imported into SurfCAM. Three layers were created; 0-Iges layer (Original CMM Coordinates), 1-Profile layer (YZ point to point), and 2-Arc layer (YZ line/arc thru all points). After careful comparision of the 3 layers and a bit of tweaking, the third layer was choosen to generate the G-Code.

Based on that data in the third layer, a 3/8 4-flute ball nose endmill was choosen for the cutting tool. In order to generate the appropriate line/arc code, I outputted the code in the XY plane (because SurfCAM uses point to point in the XZ or YZ planes). This gave me the code in G0, G1, G2, and G3 format with cutter compensation for the 3/8 cutter. I just flipped the axis to YZ on the CNC machine before entering the code in the editor.

Here is a sample of the code:

Code:
 
; ICN_PATH = c:\intercon\4-53-A.icn 
; --- Header --- 
N0001 ; CNC code generated by Intercon v1.21 
; Description: 4-53 Billet Rotor Contour 
; Programmer: Dan J. & Bruce W. 
; Date: 8-April-2009 
M25 G49 ; Goto Z home, cancel tool length offset 
G17 G40 ; Setup for XY plane, no cutter comp 
G20 ; inch measurements 
G80 ; Cancel canned cycles 
G90 ; absolute positioning 
G98 ; canned cycle initial point return 
; --- Comment --- 
N0002 ; Short Bore 120 CID Version 
; --- Comment --- 
N0003 ; .375 Ball Nose Cutter Comp 
; --- Comment --- 
N0004 ; Figured Center Line 
; --- Comment --- 
N0005 ; .015 Inch Step Over 
; --- Tool #1 --- 
;Tool Diameter = 0.3750 Spindle Speed = 3000 
; 
G49 H0 M25 
G0 X0.0 Y-2.4375 
N0006 T1 M6 
S3000 M3 
M8 
G4 P2.00 ; pause for dwell 
G43 D1 
; --- Rapid --- 
N0007 X0.0 Y-2.4375 Z-0.8576 H1 
; --- Line --- 
N0008 G1 X0.0 Y-2.36 Z-0.7704 F75.0 
; --- Arc CCW --- 
N0009 G3 G19 X0.0 Y-2.3279 Z-0.5465 J-7.3362 K1.166 
; --- Arc CW --- 
N0010 G2 X0.0 Y-2.2749 Z-0.4049 J0.3759 K-0.06 
; --- Arc CW --- 
N0011 X0.0 Y-1.2542 Z0.1735 J1.3095 K-1.121 
; --- Arc CW --- 
N0012 X0.0 Y-0.7689 Z0.1468 J0.1802 K-1.149 
; --- Arc CW --- 
N0013 X0.0 Y-0.511 Z0.0197 J-0.1951 K-0.7212 
; --- Arc CW --- 
N0014 X0.0 Y-0.4267 Z-0.0718 J-0.2399 K-0.3056 
; --- Arc CCW --- 
N0015 G3 X0.0 Y-0.3041 Z-0.1238 J0.115 K0.1007 
; --- Line --- 
N0016 G1 X0.0 Y0.3041 
; --- Arc CCW --- 
N0017 G3 X0.0 Y0.4267 Z-0.0718 J0.0076 K0.1527 
; --- Arc CW --- 
N0018 G2 X0.0 Y0.511 Z0.0197 J0.3242 K-0.2141 
; --- Arc CW --- 
N0019 X0.0 Y0.7689 Z0.1468 J0.453 K-0.5941 
; --- Arc CW --- 
N0020 X0.0 Y1.2542 Z0.1735 J0.3051 K-1.1223 
; --- Arc CW --- 
N0021 X0.0 Y2.2749 Z-0.4049 J-0.2888 K-1.6994 
; --- Arc CW --- 
N0022 X0.0 Y2.3279 Z-0.5465 J-0.3229 K-0.2016 
; --- Arc CCW --- 
N0023 G3 X0.0 Y2.36 Z-0.7704 J7.3683 K0.9421 
; --- Line --- 
N0024 G1 X0.0 Y2.4374 Z-0.8576
This code was entered into a CNC machine with Centroid controls using the Intercon editor/compiler. Some modifications will be required to make it work with other controls. This code represents only one pass along the contour on the YZ axis and not the entire surface along the X-axis.

BTW, I'm from the Oxford area. I would consider doing some side work possibly.
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Old 05-27-2009, 06:08 PM   #16
BadBlownMotor
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Default Re: Custom building a 4-53 Street Blower

Sorry Harry, I still need to ask the boys in the inspection room about how much they would charge for a CMM job. They were in a meeting this morning...

This is just a little more about the CMM to CNC process for anyone who is interested in this sort of stuff:


This photo shows the Line/Arc layer of the rotor profile taken from Rhino 3D. (This is actually an older file version where zero is at the back edge.)



This photo shows a 3D view of the rotor profile on the CNC controls.

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Old 05-29-2009, 03:18 PM   #17
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Default Re: Custom building a 4-53 Street Blower

Hello again. I just finished up rough turning the new rotor shafts and lightened up the new rotors this morning. I weighed both the rotors and the shafts together. They are over 2 lbs. less in combined weight than the original stock rotors and shafts. Very Nice! Stronger and heavier dutier parts that are lighter than stock. You can beat that! Now all I need to do is O.D. grind the shafts and machine the pin holes into the rotors...

Unfortunately, I will have to put this project on hold for a few weeks. I will be resuming normal working hours. In the mean time, I have to start figuring out the intake manifold. I already have a couple of ideas in mind. I will try to post some stuff about the manifold whenever I get a chance later on.

Here is yet some more photos for everyone to druel over...

New 4150 Moly Steel Shafts: (Note the bearing diameters at each end.)




A view of the end a rotor:




Another look at the rotors:




To Harry: I check with my shop about CMMing. 60$ to 100$ an hour depending on the size and complexity of the job.
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Old 05-30-2009, 01:16 PM   #18
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Default Re: Custom building a 4-53 Street Blower

Last night I went over and took a look at the 291 Desoto at my friends place (know here as FalconBob). I wanted to get a good look at what I was dealing with when I get ready to design and fab a custom blower intake for the 6v53.



I told him that we need to get the distributer or at least one to use as a mock up. I have to know how much clearance is needed when designing the manifold. I also took a good look at how the heads were ported for both the intake and the cooling system. All this is very critical for the design. He has an original 4-barrel intake that I will use to study the flow of the cooling in and out of the heads. NO, that intake is not for sale at the moment! Please don't ask...



Since he didn't have a set of gaskets to use as a template, we just made a crude one out of masking tape and cardboard for now. I also did some measurements on the heads to double check how we did. Not bad. I will make one flange based on what we found and test it out on the heads to see if we got it right.



That's all for now. Stay tuned for more on this custom build later...

Last edited by BadBlownMotor; 07-13-2009 at 03:34 PM.
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Old 06-01-2009, 09:42 AM   #19
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Default Re: Custom building a 4-53 Street Blower

I am open to any suggestions, comments, or technical specifications on the blower intake. I know there are others that either built one or are in the process of building one here. So, please feel free to post any information that could help me with the intake in this thread or leave a PM. In the mean time, I will be trying my hand at coming up with a good design.
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Old 06-01-2009, 11:51 PM   #20
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Default Re: Custom building a 4-53 Street Blower

Quote:
Originally Posted by BadBlownMotor View Post
To Harry: I check with my shop about CMMing. 60$ to 100$ an hour depending on the size and complexity of the job.
Hey, thanks, any idea how much time they spent on your rotor?
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Old 06-02-2009, 02:40 AM   #21
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Default Re: Custom building a 4-53 Street Blower

Nice build it is a pleasure to see good workmanship in a unique project.
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Old 06-02-2009, 03:49 PM   #22
BadBlownMotor
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@ Harry:

I believe it took less than an hour to setup, digitize, and export the coordinates from the CMM. We spent a couple of hours manipulating the geometry in SurfCAM before exporting any code. I then took the exported code from SurfCam and created a new CNC program from that to check all of our work. Several test pieces were made from the program on the CNC; the first one was made from plastic; two more from aluminum. The first aluminum part was done on one side. This was a piece to check from and to experiment with surface finishes. The Second part was completed on both sides and had a slip-fit hole which could slide over the orginal rotor shaft to get an actual side by side comparision of new vs old.

The program:

I took the original SurfCAM file, which was exported as line/arc in the XY plane with 3/8 cutter comp, and entered it into the Centroid CNC controls using the Intercon editor/compiler for use in the YZ plane with a 3/8 ballnose cutter. I entered all the lines as point-to-point, and all the arcs as end-point-and-radius. The tool path was created so that the shaft bore is the center line of the contour.

The tool path:

The tool path is made up of 4 segments. The first segment is the contour starting from the negative side of Y moving toward the positive side of Y. The second segment is the step over on X, which is either .030 for roughing or .015 for finishing. The third segement is the contour starting from the positive side of Y moving toward the negative side of Y. The fourth segment is yet another step over on X (.030 for rough, or .015 for finish). After that, I just repeated the block as many times as needed to exceed the length of the finished rotor.

Once I had all the numbers, creating the g-code was simple. Your case would be a little different. A complete CMM digitizing would be required to capture all the points. This would probably include proto-typing as well. All of that would take more time and more money.


@ Claymore:

Thanks.
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Old 06-02-2009, 04:13 PM   #23
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Default Re: Custom building a 4-53 Street Blower

holy crap ... and to think i was proud because i made my own motor mounts!
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Old 06-02-2009, 05:40 PM   #24
Harry Bergeron
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Default Re: Custom building a 4-53 Street Blower

"I believe it took less than an hour to setup, digitize, and export the coordinates from the CMM. We spent a couple of hours manipulating the geometry in SurfCAM before exporting any code. I then took the exported code from SurfCam and created a new CNC program from that to check all of our work."

Sounds like the time and money is in the expert software wrangling. Beautiful, close-tolerance work, congrats.
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Old 06-04-2009, 02:35 PM   #25
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Default Re: Custom building a 4-53 Street Blower

Yes, most of the time was spent on post work after digitizing for the rotors. Although a CMM can measure very accurately, I took no chance in having error that's why I made the tests pieces to check against. Kind of like having an insurance policy. Better to double check it with redundancy than having your actual part in the scrap bin.

The original parts where not perfect either. They are mass produced pieces. They were most likely done on a duplicater or possibly a shaper mill. It looks to be most likely the later. A custom ground cutter was probably used to cut the entire profile. There was a very slight amount of asymmetry in the profile. They corrected this by flipping one rotor 180 degrees so that opposite lob profiles would mesh during the original assembly of the unit. We corrected this in the software which made all profiles fit and match with perfect symmetry.
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Old 06-05-2009, 02:47 PM   #26
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Default Re: Custom building a 4-53 Street Blower

I just thought of something else for those who may wonder. The issue with a having completely balanced rotor assembly.

The answer to that question is there should be no balancing required with the new parts. The reason for this is because of the new billet material and perfect symmetry on center-line. So, both lobs of each rotor should be effectively weight matched in the percision machining.

The original rotors had to be spin balanced because they were originally made of a cast material. Casting defects and uneven material density was and issue which had to be addressed with in the balancing of the parts.


I am currently still in the process of designing the intake manifold. We now have a mock up distributor to work with. I have to take a few more measurements and I will be off to the computer to draw up a design. Since this blower is a low profile unit, I'm going to make the manifold height as short as possible. Stealthiness is the theme for this project even though it's not exactly required for our use.
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Old 06-08-2009, 07:59 PM   #27
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Default Re: Custom building a 4-53 Street Blower

I know a lot of you guys here are probably wondering how my progress with this build is going. All I can says is be patient. I'm using the next couple of weeks to design the intake for the 4-53 blower while I'm back to full time hours at work. I don't know when I will have machine time available. I may have to schedule a couple of Saturdays in the future for that.

As I said before, we do have a distributer to use for mock up. I talked to FalconBob this evening. He says he has a couple of carburetors he thinks we can rebuild and use on the motor. I think I will make another trip over to his house to get some more measurements possibly tommorrow.


Some more tech info:

I had a conversation with a fellow employee about the seals wearing a groove into the rotor shafts. He suggested that on a future rebuild of the blower I should have the rotors ceramic coated and reground in the area where the seals meet the shaft. Since the ceramic coating is much harder than the steel, it will hold up far longer and the seals will most likely wear out before the ceramic coating would.

You would basically cut a groove into the shaft in the area where the seals meet the rotor shaft. I believe its something like .020 to .040 or so in depth. You would have to send the shafts out for ceramic coat at this point, and then a careful regrinding would be needed.

This is the sort of proceedure that is used on a lot of industrial machinery to minimize the rebuilding cost. A nice idea that I thought I would share with you fellow Hambers. Of course, you need to have access to the proper equipment and contacts to do this, but you could also suggest this to a shop who is doing the work for you. Better to be armed with a little knowledge before hand than going in blindly.
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Old 06-30-2009, 02:52 PM   #28
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Default Re: Custom building a 4-53 Street Blower

Hi everyone. I haven't posted anything for a while. I thought I would give you some news.

We are currently working on a model of the intake manifold made out of MDF. The model is to make sure that our dimensions are correct before we build the actual intake. I will try to post some pictures of it when its finished. I'm sure there will be a few changes along the way before there is a final prototype.

We will probably use a SBC thermostat for this intake to save room.

I've also decided to go ahead and make the snout instead of purchasing and modifying one. This will significantly reduce the cost. I will make it after that intake has been completed and the blower is assembled. Once everything is in place, it shouldn't be a problem of determining the required snout length.

After Falcon Bob did some checking with a "gear head" friend of his, he thinks we should get about 425+ hp out of the build with this blower. This depends on the CR and how much boost we actually make.

I think a stock 291 was about 200 hp. With the right cam specs, head work, and carbs, we should get at least 300 hp or more before the blower.
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Old 06-30-2009, 03:04 PM   #29
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Default Re: Custom building a 4-53 Street Blower

Cool! and I need a 3-71 snout.....
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Old 06-30-2009, 03:50 PM   #30
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Default Re: Custom building a 4-53 Street Blower

What motor are you planning to use with your 3-71?

I would need to know the rotor drive gear size (the coupler for the drive gear has to be sized so it does not interfere with the drive gear teeth or the front cover and snout), the snout flange size where it mounts to the front cover, the snout length, input shaft diameter, and pulley size. I also need to know all of the bolt sizes and patterns for each part.

How fast will you be turning your blower? A correct bearing spec must be determined for the max dynamic load and limiting speed rating. Heavier is better, but lighter is not to ensure good bearing life.
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Old 06-30-2009, 03:56 PM   #31
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Default Re: Custom building a 4-53 Street Blower

I'm at work in North Dakota, but will be home next week. I'll pm you the info.

I'll be shooting for abot 6lbs boost, on a Caddy flathead.
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Old 07-01-2009, 10:37 PM   #32
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Default Re: Custom building a 4-53 Street Blower

WOW! Nice machine work and it would look tits on the desoto..good luck and keep us posted on this...no matter what it goes on its gonna be mean looking.
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Old 07-04-2009, 01:54 PM   #33
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Default Re: Custom building a 4-53 Street Blower

Thanks, Big Tony. We are getting more excited about this project by the day. This thing is going to look sick when it's finished!

It may take some time to get this thing done, but we are making progress. I'm not in a hurry. I just want to take our time and do this thing up right...

So far, we got the bottom end of the intake manifold just about done on the MDF model. I'm talking about the mounting flanges that bolt to both heads, and the intake runners. The way it stands at the moment, the manifold will be a modular design. It will primarily consist of two sets of intake runners for the right and left banks, the plenum, the coolant manifold block for the thermostat, and the blower adapter plate that mates the blower to the plenum.

We want to keep everything as short as possible. We currently have the runners at 3 1/2 inches from the heads to the bottom of the plenum. While looking at the height of the thing yesterday, I think we may be able to drop this down a little more to maybe 2 1/2 or 3 inches. I guess it depends on what we come up with for the coolant ports and thermostat housing. We may have to plumb it with some AN lines to the thermostat housing. It's going to be tight, but I think we can do it. The coolant block will probably bolt somewhere on the bottom front of the plenum. We still need to play around with it a bit before we can determine the final location.

We are going to run an old Crysler Petronics dual point distrubuter. It's small enough to give us the room we need. However, it looks like I might have to put a half moon cut out in the back of the plenum to allow for enough clearance.

Since the 4-53 does not have any bolt flanges on the sides of the case, I had to come up with a way to actually bolt that part of the blower to the adapter flange to ensure a proper seal. Originally, the front and rear bearing plates had thru holes for bolting it down. Those plates will still have holes but, they will just be threaded at the bottom along with a couple of locating dowels. The screws will go up thru the bottom of the adapter plate. The fasteners will be flat-head screws. The case will have cross bolts that come in from the side of the case and screw into several tabs that are machined on the top of the adapter plate. The tabs double as locater keys and fastening points for the case. Fastening the case in this manner should increase the strength and reduce case distortion.

I will cover more of the design later when I feature the assembly of the blower here. That way everyone will understand how it goes together and why.
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Old 07-04-2009, 02:06 PM   #34
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Default Re: Custom building a 4-53 Street Blower

Why did you feel it was necessary to build new innards for your blower? Zora Arkus-Duntov used a stock 4-53 on a 265 in '55 and had no reliability issues.
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Old 07-04-2009, 03:31 PM   #35
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Default Re: Custom building a 4-53 Street Blower

There were several reasons that prompted me to build new inards. As you probably already know, the 4-53 has bearingless directly oiled rotor shafts. I wanted to eliminate that fact with this build and convert it to use bearings.

I didn't want to have to use pressurized engine oil to lubricate the unit or even have an external oiling source. This would eliminate some of the potential problems of oil leaks, blockages, and excess heat, and oil contamination introduced into the intake charge.

The shaft diameters are a non-standard size of 0.859 diameter. They were also worn in the plate bore areas. I wanted to ensure bearing availability. Its hard to find a bearing in that size. So, I made the new shafts with at a .866 bearing diameters.

However, I was goings to remove the shafts and have them hard chromed and reground. In order to do this, it would be necessary to separate the parts for hard chroming and regrinding. I didn't want to try re-welding them because of fear of warpage especially in the spline area. I also couldn't get them apart. The pins were removed. The parts where soaked in pentetrating oil for two weeks. The rotors where heated and we attempted to press the shafts out on a hydraulic press with no luck. This is most likely do to corrosion of dissimilar metals as well as the press fit.

Making new shafts also corrected some problems with rotor end-play when converting it to use bearings. The new rotors were also made with a tighter clearance at the tips. No teflon needed. The rotors will also be more serviceable in the future in part because of the annodized finish they will receive that will include the shaft bores. It will make them easier to remove from the shafts by reducing some of the corrosion problems.

Besides, it will be a one-off custom nobody has that I made myself. Who can even say that?
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Old 07-05-2009, 06:12 AM   #36
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Default Re: Custom building a 4-53 Street Blower

Fuck yeah! This is outstanding!
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Old 07-05-2009, 06:23 AM   #37
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Default Re: Custom building a 4-53 Street Blower

Quote:
Originally Posted by Psychobilly Boi View Post
Fuck yeah! This is outstanding!
What he said !!

Great stuff - makes me wish I had a similar machine and KNEW how to use the bloody thing !!

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Old 07-07-2009, 04:24 PM   #38
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Default Re: Custom building a 4-53 Street Blower

Yeah, I wish I had a couple of those CNCs in my garage. Just like the ones I run at the shop. I could get things done a lot quicker. I could also do a lot of side work for people without being impaired.

I have a few friends that have manual mills. One of them has a lathe also. So, there is always a possibility of doing small jobs for people.

Anyways, to further my answer of why I built new guts for my blower. There wasn't a question of reliability. It is a matter of conversion, modification, adaptation, and customization.

I also wanted to do sort of a cook book with this build leaving virtually no stone left unturned. Well, with the exception of making the case from scratch for this unit, it would cover a complete machine job. It would give plenty of information for someone who is willing to follow in my footsteps to go by.
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Old 07-08-2009, 03:57 PM   #39
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Hmm... It must be a coincidence. I've been searching around for stuff on the web about the 4-53 blower for a while. Not much has come up about people refurbishing or rebuilding them for hot-rodding much intil now. At least they haven't been advertising as such.

There is a company offering these units converted for sale. They have some pictures of them up on their website along with a price. I think they were asking just under 1500 bones for a 4-53. They even offer a 6-53 and a 6v-53 version as well.

I guess they are still working on a final 4-53 version. Although they look pretty cool right now, they still don't look as good as mine will. Of course, I'm kind of basis at the moment.

It appears that they made the front cover and front bearing plate use the same bolt holes. So, everything is sandwiched together like the original 4-53 design. The rear bearing plate uses the standard design like most units have. I also noticed something about their design in the pics they have that puzzles me. How the heck do you bolt the sucker down to the intake? Maybe they will reveal that in their proclaimed updates...

The plates on my unit have newer features than the original design, but they do have throw-backs. They are similar in size and functionality, but the front bearing plate doesn't use the same bolt holes for the front cover. Both front and rear plates are the same thickness of 1 1/2 inches like the originals as well. I decided to retain the thickness to allow more surface area for a dual carb plate, and the fact that you can still bolt the unit down at bottom of the bearing plates.

I haven't figure a total price for my build, but I'll bet I will still save a lot of money building the thing myself. It will include everything minus the pulleys and the belt. They are pricing just for the unit by itself and not everything else that goes along with it.
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Old 07-08-2009, 04:18 PM   #40
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Default Re: Custom building a 4-53 Street Blower

Very cool! I have a new 4-53 that has been waiting for the right engine to mount it on. Might end up on my brothers Flatty or my A Banger down the road.
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Old 07-08-2009, 04:20 PM   #41
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Default Re: Custom building a 4-53 Street Blower

Lots of 4/54 threads here if you search. do an advanced search and use my user name and they will pop up.


Quote:
Originally Posted by BadBlownMotor View Post
Hmm... It must be a coincidence. I've been searching around for stuff on the web about the 4-53 blower for a while. Not much has come up about people refurbishing or rebuilding them for hot-rodding much intil now. At least they haven't been advertising as such.

There is a company offering these units converted for sale. They have some pictures of them up on their website along with a price. I think they were asking just under 1500 bones for a 4-53. They even offer a 6-53 and a 6v-53 version as well.

I guess they are still working on a final 4-53 version. Although they look pretty cool right now, they still don't look as good as mine will. Of course, I'm kind of basis at the moment.

It appears that they made the front cover and front bearing plate use the same bolt holes. So, everything is sandwiched together like the original 4-53 design. The rear bearing plate uses the standard design like most units have. I also noticed something about their design in the pics they have that puzzles me. How the heck do you bolt the sucker down to the intake? Maybe they will reveal that in their proclaimed updates...

The plates on my unit have newer features than the original design, but they do have throw-backs. They are similar in size and functionality, but the front bearing plate doesn't use the same bolt holes for the front cover. Both front and rear plates are the same thickness of 1 1/2 inches like the originals as well. I decided to retain the thickness to allow more surface area for a dual carb plate, and the fact that you can still bolt the unit down at bottom of the bearing plates.

I haven't figure a total price for my build, but I'll bet I will still save a lot of money building the thing myself. It will include everything minus the pulleys and the belt. They are pricing just for the unit by itself and not everything else that goes along with it.
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Old 07-08-2009, 06:14 PM   #42
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Default Re: Custom building a 4-53 Street Blower

That's not exactly what I was trying to say. I know there are threads on here about the 4-53. What I was taking about was 4-53s being rebuilt and converted for the street by a company not by people like us.

But thanks for advanced search tip, Tman. I didn't even bother with that before.

BTW, since we are here on the subject. Did you ever get your 4-53 to work on your flatty? I didn't read that far into the threads...
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Old 07-08-2009, 06:57 PM   #43
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Default Re: Custom building a 4-53 Street Blower

Oops. Sorry Tman, I didn't read your post before the last one. I went directly to the last page of this thread. I thought you may have already got your 4-53 up and running.

If you got any questions, comments, or technical information you would like to share, please feel free to post them here. I'm always open to suggestions.
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Old 07-08-2009, 07:30 PM   #44
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Default Re: Custom building a 4-53 Street Blower

It's always nice to read a post about a cool build. Well written, clear in thought and covering a subject I know nothing about. Of course the topic is above my pay grade, heady shit to be sure. Of course the question remains...why and BadBlownMotor answers with his own style of why not. Even it a high tech world the problem started out because the blower didn't use bearings and the shaft was a odd size, that I can relate to square pegs and round holes...story of my life too.
Good luck
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Old 07-10-2009, 10:53 AM   #45
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Default Re: Custom building a 4-53 Street Blower

Quote:
Originally Posted by BadBlownMotor View Post
Oops. Sorry Tman, I didn't read your post before the last one. I went directly to the last page of this thread. I thought you may have already got your 4-53 up and running.

If you got any questions, comments, or technical information you would like to share, please feel free to post them here. I'm always open to suggestions.
No worries, my brother may get to run it on his flatty down the road. Both of our cars are under construction and ElPolacko got me hooked on turbos so.............
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Old 07-10-2009, 11:07 AM   #46
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Default Re: Custom building a 4-53 Street Blower

Very cool
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Old 07-10-2009, 11:56 AM   #47
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Default Re: Custom building a 4-53 Street Blower

Wow. that's some serious do-it-yourself ambition there.

Have you started on the manifold for this yet?
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Old 07-10-2009, 02:56 PM   #48
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Default Re: Custom building a 4-53 Street Blower

@ Tman

That's very cool. If you need help with your 4-53 later on, you know where to look. I would be happy to help you out. After all, that's why I'm doing this thread.

I was also thinking about doing a turbo motor for my Monte Carlo project. It was originally going to be a 550 hp supercharged 406 SBC build, but a friend had turned me on to turbos as well. Not sure which way I will actually go with the build yet. I do have a Motown race ready small block sitting in my garage right now. I have to wait and see because money is tight for me right now. So, in the mean time I'm helping my friend out with his Desoto project.

@ Hudsoncustom

I haven't had a chance to get back to work on the MDF model of the intake manifold this past week. Life has a way of doing that sometimes.

I hope to get back to it early next week. I don't think it will be much longer before we finish it up the model. I would like to get some pics posted up here of it soon... Then its off to cutting the aluminum stock, TIG welding, and machining.

The recent down time has afforded me to rethink the design a bit though. Nothing major. Just some minor changes mostly in the adapter plate area.


Be patient guys. I'm dying to get her done myself...
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Old 07-10-2009, 03:01 PM   #49
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Default Re: Custom building a 4-53 Street Blower

What carbs are you running? You model a top plate yet?
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Old 07-10-2009, 03:14 PM   #50
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Default Re: Custom building a 4-53 Street Blower

Well, actually I'm not sure what the decision is currently. I was leaving that part last on the list. Falcon Bob has to tell me what he wants because it's his motor that the blower is going on. He said he would like to keep it as vintage as possible, but I guess it's also what ever we can make work too. I do know he was talking about two fours. You know what? I'll get back to you on that one. I know he's got at least a half dozen different carbs sitting around over there. So, will see what he says.
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Old 07-10-2009, 05:20 PM   #51
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Default Re: Custom building a 4-53 Street Blower

I just took a peek again at the website for the company who is converting the 4-53 blowers. http://www.fordflathead.com/6-53_6v53_4-53_blower.html

I'm impressed. Very nice job they are doing. Most of the features seem to be very close to what I'm doing with my build.

Here is a basic comparision by what I've read about their conversion vs. mine in this thread.

Simularities:

1. We both are using 5/16 bolts for the front cover. Except I'm using more of them. I'm also using stainless steel thread inserts in the holes.

2. Large site glass

3. Heavy duty bearings rated for 10,000 rpms.

Differences:

1. They reground the stock rotor shafts to possibly .8125 diameter at the ends to except standard bearing. My shafts are new 4150 steel at .8661 (22mm) in diameter at the ends and .9842 (25mm) thru the rotors. This allows a much larger shoulder for the inner bearing race to ride against. Actually, the bearing manufacturer recommends at least a 26 mm at a shoulder, but it was a comprimise. I didn't want to make the rotor bore wall to thin in the valley area between the rotor lobs. I wanted have as much meat as possible in that area for the locking pin holes. My shafts are also much stronger and more ridgid. I've also shaved some weight which is approximately 4.5 lbs total in the rotor assembly. I could possibly shave even more.

2. I left both bearing plates the same size to allow for more support and strength as well as surface area for a dual carb plate to over lap on. The carb plate will be able to bolt to the top of the case as well bearing plates. This will help tie the unit altogether and reduce some of the case flexing and twisting.

3. My bearing retainers will use six bolts instead of the standard three. This allows for more even clamping pressure around the outer bearing race.

4. I've incorporated a rear bearing thrust washer for the inner bearing race.

5. Plated gears. This may be a good idea for longer gear life and lubrication. I may consider this in my build. My gears are just black oxided.

6. Annodizing. Most of my aluminum parts will recieve this as a finish.

7. Not sure if they are incorporating this in their version, but my front cover will have a oil drain plug and a pressure relief valve installed.

8. Although they haven't specified on their conversion, I will be using 3/8 bolts and dowels to fasten my blower to the adapter plate. Four bolts and 2 dowels on the front and rear plates. Not sure yet on the case.

9. Theirs: Neopreme Seals. Mine: I'm using teflon seals rated at 35 psi and 450 degrees max temp for a 25mm diameter.


I'm sure there is probably more similarities and differences, but it does give me a little more confidence with my project. I'm not an expert but, I can say I believe I'm definately on track with my build. Like I said, I'm always open for suggestions.
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Old 07-10-2009, 06:04 PM   #52
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Default Re: Custom building a 4-53 Street Blower

Interesting link, thanks.
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Old 07-11-2009, 07:58 AM   #53
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Default Re: Custom building a 4-53 Street Blower

Boy, do I feel really stupid!!! I went back to the website (link above) and looked at their information about blower measurements. Wow! I found out that my blower is actually a 6v53 long bore version. Not knowing the size of these blowers I took someones word for it and thought mine was a 4-53.

My case dimensions measure at 5.750 x 13.100 which is the excact dimensions for a 6v53 long bore. 209 CID displacement!

Well, its not all bad I guess after my embrassement. Bigger is always better in this case! More fuel/air means more power especially at lower Rpms.

So, If you read this, just know that your reading about a 6v53 Long Bore! Once again, sorry for my misinformation.

Last edited by BadBlownMotor; 07-11-2009 at 08:01 AM. Reason: grammer
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Old 07-13-2009, 03:18 PM   #54
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Default Re: Custom building a 4-53 (really a 6v53) Street Blower

Once again, sorry for the mess up on the blower. Well, this mess up came out to be a really good one though...

My 6v53 blower case:



We should be resuming work on the model of the intake this week. Hopefully, this evening will be productive. I've already found quite a bit of scrap aluminum stock at the shop that we can use. That should cheapen up the build a bit. I just need to get a few more pieces and we should be good for materials.

*** I will be making some fixes and changes in this thread to address the mix up.
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Old 07-16-2009, 03:45 PM   #55
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Default Re: Custom building a 4-53 Street Blower

We are just about finished with the MDF blower intake model for the 291 Desoto. We just need to make a mock up adapter plate and double check the distributer clearance and the over all plenum dimensions. I must say, we are very pleased with our efforts so far. The intake seems to have the proper scale and dimension, but there is always room for improvement most of which can be addressed in the actual build.

Once we are satisfied with everything, I will begin fabricating the actual intake from aluminum, but I would like to get a few more opinions before hand. I should have a photo of the wood model to post here by sometime early next week.
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Old 07-16-2009, 03:54 PM   #56
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Default Re: Custom building a 4-53 Street Blower

Cool.
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Old 07-16-2009, 04:03 PM   #57
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Default Re: Custom building a 4-53 Street Blower

Hey, Tman. I asked Falcon Bob about the carbs. He said he's got a set of 4150 Holleys that he just rebuilt that he would like to run. He still needs to get the linkage for them. So, I will pattern the carb plate as such.

I wonder if a tri-power setup would like good sitting on top?
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Old 07-17-2009, 09:13 AM   #58
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Cool Re: Custom building a 4-53 Street Blower

Quote:
Originally Posted by BadBlownMotor View Post
I just took a peek again at the website for the company who is converting the 4-53 blowers. http://www.fordflathead.com/6-53_6v53_4-53_blower.html

I'm impressed. Very nice job they are doing. Most of the features seem to be very close to what I'm doing with my build.

Here is a basic comparision by what I've read about their conversion vs. mine in this thread.

Simularities:

1. We both are using 5/16 bolts for the front cover. Except I'm using more of them. I'm also using stainless steel thread inserts in the holes.

2. Large site glass

3. Heavy duty bearings rated for 10,000 rpms.

Differences:

1. They reground the stock rotor shafts to possibly .8125 diameter at the ends to except standard bearing. My shafts are new 4150 steel at .8661 (22mm) in diameter at the ends and .9842 (25mm) thru the rotors. This allows a much larger shoulder for the inner bearing race to ride against. Actually, the bearing manufacturer recommends at least a 26 mm at a shoulder, but it was a comprimise. I didn't want to make the rotor bore wall to thin in the valley area between the rotor lobs. I wanted have as much meat as possible in that area for the locking pin holes. My shafts are also much stronger and more ridgid. I've also shaved some weight which is approximately 4.5 lbs total in the rotor assembly. I could possibly shave even more.

2. I left both bearing plates the same size to allow for more support and strength as well as surface area for a dual carb plate to over lap on. The carb plate will be able to bolt to the top of the case as well bearing plates. This will help tie the unit altogether and reduce some of the case flexing and twisting.

3. My bearing retainers will use six bolts instead of the standard three. This allows for more even clamping pressure around the outer bearing race.

4. I've incorporated a rear bearing thrust washer for the inner bearing race.

5. Plated gears. This may be a good idea for longer gear life and lubrication. I may consider this in my build. My gears are just black oxided.

6. Annodizing. Most of my aluminum parts will recieve this as a finish.

7. Not sure if they are incorporating this in their version, but my front cover will have a oil drain plug and a pressure relief valve installed.

8. Although they haven't specified on their conversion, I will be using 3/8 bolts and dowels to fasten my blower to the adapter plate. Four bolts and 2 dowels on the front and rear plates. Not sure yet on the case.

9. Theirs: Neopreme Seals. Mine: I'm using teflon seals rated at 35 psi and 450 degrees max temp for a 25mm diameter.


I'm sure there is probably more similarities and differences, but it does give me a little more confidence with my project. I'm not an expert but, I can say I believe I'm definately on track with my build. Like I said, I'm always open for suggestions.



Hey BadBlownMotor, just wanted to say nice work on what you are doing on the blowers. Lain Murphy here and I own Murphy's Blowers. The ones you see on www.fordflathead.com

Just was checking out the forum, havent been here in a while. Just to clarify a couple of things on the blowers I build. The blowers bolt down to adaptor plates that we make from the base. The original rotors are balanced and tested up to 10,000 rpm in my shop, and you are right, we regrind rotor shafts to accept bearings.

I have been building blowers for a lot of years now, and have built these blowers to be cost effective at the $1585.00 that I have up on the 6v53's and have the ability to produce blowers on the ready. I like the work you have in yours as well, and the time you have taken to make your blowers. Very nice stuff. But, I will tell you from a machine shop owners standpoint and just for your longevity in building these. The $1585.00 for a 6v53 is a very reasonable price to completely convert the blowers to a reliable street build. I am not sure what you will be selling yours for, but with the level of work you have going into them, I would imagine that when all the smoke and mirrors clears and you calculate the totals, the price will be significant. If not, hats off to you.

From an engineers standpoint, over engineering the 6v53's and 4-53's really is not neccessary. Six bolt patterns hold an amazing amount of pressure. More than you will ever need to exert on a blower. Neoprene seals versus teflon, its a personal choice. Knowing that seals wear in, and once they do after about 2 hours of time on the seal, they seal no different than one another, Teflon seals cost more.

Replacing the shafts with high grade steel, unless you are planning on winning the NHRA National Finals with the blower, it is overkill. More bolts, and all adds costs to the blower that are really not necessary for the size of these blowers.

Given years of experience at running these blowers (never offering any for sale till now on the web site), and unless you are willing to teflon strip the rotors, you will be lucky to get 15 pounds boost. Normal operating boost ranges from a couple of pounds up to about 12 maximum. But considering the normal hot rodder out there, 12 pounds is more than enough to blow an engine up. Taking the dynamic compression ratios (not talking static compression ratios) above 10.0:1 (unless the motor is built for it) obviously is not a good idea on pump gas.

I will say this though as some food for thought on the rotors you are designing. Lighten them up. If they weigh more than the cast rotors, they weigh too much. Hence part of why Weiand, Holley, and B&M built aftermarket rotors from billet extrusion rather than machining from billet solids. The rotating mass of the rotors places a lot more stress on all the components and the "as cast" rotors are fine in the weight dept.

A similar concept applies as anyone who is in the "know" on piston velocity in a cylinder. a few GRAMS of differences in piston weight translates into hundreds of pounds of pressure per square inch on the wrist pin, connecting rod, and piston at top deac center and bottom dead center on a high revving motor.

Rotor weight acts somewhat the same but not as critical. Your blowers will LAST a lot longer the lighter the rotors, and more balanced they are.

You can place the MOST tricked out parts in the blower you want, but when it comes to longevity, that is the true test. People want a blower that they never have to replace.

Very cool stuff,

Lain Murphy
Murphy's Blowers
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Old 07-17-2009, 10:24 AM   #59
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Default Re: Custom building a 4-53 Street Blower

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Hey, Tman. I asked Falcon Bob about the carbs. He said he's got a set of 4150 Holleys that he just rebuilt that he would like to run. He still needs to get the linkage for them. So, I will pattern the carb plate as such.

I wonder if a tri-power setup would like good sitting on top?
I saw a 32 with a flatty,blower and 3 carbs on top and it looked nice.
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Old 07-17-2009, 10:27 PM   #60
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Hi Lain. Thank you for your response to my project thread. It's nice to have someone with experience in this field give their input.

This project is not intended for an average do-it-yourself hot-rodder, but for someone with enough knowledge and access to the right equipment, machinery, and tooling. The aim here is to provide basic ground work for those type of people who want to tackle a project like this on their own. I had no intention of making a full blown business out of it. Well, at least for now...

My comparisons to your blower conversion verus mine was not meant to be a competitive one. It was meant to be an objective one. I'm comparing something that was professionally done by experienced people in the field to something done by a hotrod enthusiast. All I can say is that I don't think I've done a bad job so far.

I understand that engineering and building equipment takes time and money. I've been around the block many times myself to know this to be true. I'm not disputing that at all, but I'm also seeing things from a nonprofessional stand point as well. Most people who are into hot-rodding and vintage car building are average people. They try to do most things themselves and many of them are very talented at it to be sure. They do it because they enjoy it and have a passion for it. They build there projects to suit them and they take pride in it. Usually, these kind of people don't have an endless supply of money to fulfill their dream. So, they try to save money where ever they can. And If anyone would factor the time in their projects as far as money goes, nobody would build anything. I believe that I can consider myself one of those people.

I agree that adding small items such as nuts, bolts, ect. can drive the cost up a bit. If it only adds up to a few dollars and cents, who cares? It's a personal preference at this point. Even with the addition to all of the purchased parts (like the aluminum, steel, smoke, and mirrors), I bet I still won't have anywhere near your advertised price in my blower. This of course does not include the designing and "engineering". I know what the materials cost. I deal with that sort of thing on a daily basis. Even if it does cost the same or more than your units, it's still my custom.

Making new rotors, shafts, and using teflon seals was a personal decision. It provided me a solution in the design as well as giving an edge in performance and better serviceablity. It also gives me the ability to reproduce parts or build a unit from scratch myself.

The rotors are in fact lighter than the originals. The total weight savings in the new rotor assembly is 4.5 lbs from the originals. I still have the ability to reduce their weight even further.


You are right about having a well balanced rotor assembly for longevity. I believe in being thorough with a project like this. I'm taking your advice. There is no sense in disreguarding something as critical as this. Once the rotors are completely finished, I will be sending them off for balancing. There is a company just down the road from my shop that specializes in this sort of stuff. They do balancing for single parts up to small production runs. I will be giving them a call on Monday for a price quote. However, I still believe the balancing will be minimal, if any.

As far as how much boost we make, we'll be happy with somewhere around 6 to 9 psi most likely.

The teflon seals are really not that expensive. What? $18.00 for a set four is expensive? Will they seal any better? Well, maybe not. Again, I agree with you here. It's a personal decision.

I am aware of the fact that there are certain aspects of my conversion that are considered to be somewhat of an overkill. Longevity is my goal for my custom project too. This project is ever evolving. Things have changed many times, and will change again before the project is completed. So, some of what I've said here in this thread may or may not be a viable in the completed design.

I respect your knowledge, expertise, and experience. I will take everthing you have said in careful consideration. I'm always open to suggestions and criticism, if need be. I don't claim to be an expert be any means. I don't want this to become a battle between us here. I just wanted to show people what could be done with a little ambition that's all.

Requards,
BadBlownMotor

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Old 07-19-2009, 11:16 PM   #61
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Default Re: Custom building a 4-53 Street Blower

We have finished enough of the wooden intake model to get a basic pattern for building the real thing. It doesn't have all the bling and the details like the real one will have. This means no chamfers, radii, bosses, bolt holes (except for the intake runner flanges), ports, and flowing contours. It's a somewhat crued model, but it should work satisfactory. The object is to get the important measurements and locations nailed for the runners and plenum. There is plenty of room to add the other stuff like the pop-off valve, thermostat housing, and ect.

BTW, once the entire project is finished, I will be gathering up all my receipts and creating and itemized list for the materials. This will be posted during the assembly process for any one who wants to know how much this will cost to build complete.

I need some input on the basic design. I can post more pictures, if needed. Please feel free to post any comments you may have...

Photo #1


Photo #2


Photo #3
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Old 07-20-2009, 02:15 AM   #62
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Default Re: Custom building a 4-53 Street Blower

Beautiful work. This is like a primer on doing a machinists dream project when you have access to the right tools for the job.
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Old 07-20-2009, 08:31 AM   #63
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Default Re: Custom building a 4-53 Street Blower

Yeah, I guess it could be considered a machinist primer of sorts.

As Lain Murphy had mentioned, some parts of this build might be over done, but that's actually the beautiful part about it. I can express my artistic creativity, and still know it will all work in the end. It will also show that it still can be done with a reasonable investment too.

People will be able to take what I've done here and tailor it to their own liking. If they can improve upon it, then by all means do so. If they tone the build down a bit, that means the cost only goes down from there.
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Old 07-20-2009, 08:43 AM   #64
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Default Re: Custom building a 4-53 Street Blower

HEY BBM, beautiful work wow !!

Are you planning on casting this intake to suit both a tall deck and lo deck Desoto Hemi??

If so can you PM me with details please?

Lain youre blowers are very nice - I have one and am waiting for it to arrive along with a bunch of other stuff. it will be going on a 330 Desoto Hemi.

Very nice work !!

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Old 07-20-2009, 09:28 AM   #65
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Default Re: Custom building a 4-53 Street Blower

Hi, Rat.

The intake is designed for a 291 low deck Desoto. We haven't looked into making them for tall decks as our project vehicle will have this motor. It will be made from tig welded aluminum. We have no intentions of putting them into a casted production. Information and measured drawings of this project will be available at assembly time.

I believe there was several people making manifolds for tall decks here on the HAMB. I think they were for a 4-71 and 6-71 blower application. One of those guys was talking about making them as cast. I'm not sure though. Do a search, if you haven't already done so.

If there is enough interest in the manifold, there maybe a chance that we could do a limited run as a "U-Fab" or a welded version. We could even do one for a tall deck possibly. This would be far off for us at the moment. We are not finished with this one yet.
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Old 07-22-2009, 10:38 PM   #66
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Default Re: Custom building a 4-53 Street Blower

I was hoping for more responses to the intake. I will probably start the actual machining and fabrication as early as tomorrow morning. It should be a fun project to work on. Wish me luck guys and girls...
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Old 07-25-2009, 07:51 AM   #67
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Default Re: Custom building a 4-53 Street Blower

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Originally Posted by BadBlownMotor View Post
I was hoping for more responses to the intake. I will probably start the actual machining and fabrication as early as tomorrow morning. It should be a fun project to work on. Wish me luck guys and girls...
Nice work so far BBM

On that last big post that you replied to mine,
By all means, I am not wanting this to be any kind of tiff or anything either. I was just straightening out some stuff from the earlier posts.

I like what you have here too. I like that you are targeting the DeSoto's and such. That is one area I wont really mess with.

Mine is the flathead and small chevy. I have a small block chevy that I am working on now and will show some pics of it on here with the 6v53 setup.

Get ahold of me sometime in the email on this site, I would like to talk to you sometime over the phone more about the blowers.

Thanks,

Lain
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Old 07-26-2009, 03:35 PM   #68
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Default Re: Custom building a 4-53 Street Blower

So far... So good! I made the intake flanges for the manifold late last week. After I got them done, I rushed off to see how they bolted up to the heads. Perfecto!!! They fit like a glove and all the locations for everything was pretty much right on the money. I couldn't have asked for a better fit!

This week I'm back in the shop to do some more work...

@ Lain

Everything is cool with me. I wouldn't have a problem speaking to you about the blowers sometime by e-mail or phone.


Here is some more photos of the project:

Intake Flange Drawing


Aluminum Flanges


Flanges On The 291 Desoto
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Old 07-27-2009, 02:28 AM   #69
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Default Re: Custom building a 4-53 Street Blower

What is going in the milled edge of the holes. Are they going to be for "O" rings or were you just blending the sharp edges? Kind of hard to tell from the photos.
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Old 07-27-2009, 05:58 AM   #70
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Default Re: Custom building a 4-53 Street Blower

im going to guess that it is for runner locating for the welding of the intake
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Old 07-27-2009, 02:18 PM   #71
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Default Re: Custom building a 4-53 Street Blower

52Plybizcoupe is right. The milled pockets at the port holes are for locating the intake runners for welding.

I'm still deciding on which side the weld will end up. On the top side where it can be seen, or the bottom for a cleaner look. I guess it depends on weather or not I can get the tig torch down inside the runner port. I have to look at it some more tomorrow.
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Old 07-29-2009, 08:18 PM   #72
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Default Re: Custom building a 4-53 Street Blower

I've decided to weld the runner tubes from the bottom for a much cleaner look. So, the pockets on the top of the flanges will now go all the way thru. They are shown above to just have the port size holes all the way thru. I need to open them up to the outside tube dimensions and make the tubes long enough so they slide thru the flanges to about a 1/4 inch from the bottom. This should give me enough room to weld all the way around it with a decent amount of weld pentatration. Any weld that is left sticking out will be removed during the machining of the sealing surfaces. If you look at the wood model, this is sort of how the aluminum prototype will look. No weld on top of flanges and the outsides of runner tubes. This will also help with some of the pre-machining and machining of the parts and hopefully minimize the heat warpage issues.
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Old 07-29-2009, 09:12 PM   #73
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Default Re: Custom building a 4-53 Street Blower

Wow,I dont know how I missed this thread. But that is some outstanding machine work.


This should have been on tech week.

Keep us updated. I would like to see what a turn key kit would be also.
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Old 07-29-2009, 11:55 PM   #74
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Default Re: Custom building a 4-53 Street Blower

O U T S T A N D I N G !!

Rat
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Old 07-30-2009, 03:53 PM   #75
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Default Re: Custom building a 4-53 Street Blower

I had to make custom runner tubes from solid stock. I can't order square tubing with the correct sizing without special ordering it. You have to order so many feet of it before they will run it off for you. Special dies would need to be made for the extrusion process.

The outside dimensions are commom 1 1/2 X 2 inch, but not with a 3/16 radius at the corners and a 1.610 X 1.200 inch inside dimension with a 1/4 radius at the corners. There will be about a 5 mm wall on the 2 inch sides and almost a 4 mm wall at 1 1/2 inch sides. So, this means that the tubes are pretty much port matched to the stock 291 Desoto heads. I suppose that someone could substitute 1/8 wall square tubing. However, unless you relieve the inside corners of the pockets on the flanges, you wouldn't be able to weld up the runners that same way I've chosen.

I hope to have the runners finished up by early next week. So, look here to see new photos then.

The plenum portion is next on the list at that point and then the adapter plate.
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Old 07-31-2009, 09:29 PM   #76
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Default Re: Custom building a 4-53 Street Blower

Ok, guys and girls. I couldn't wait to post the real deal on those intake runners. So, I thought I would give you a sneak peek on how they will look and go together. I'm going to wait to weld them after I make the plenum.

Here's a render from Rhino 3D:


As you can see in the picture above, the runner tubes slip thru both of the upper and lower mounting flanges. The tubes stop at both ends 3/16 of an inch before flush. The holes are actually .040 smaller in this region to act as a stop. No guess work or measuring needed at this point.

The tig welding will be done in the area around the tubes in the recess. Once they are welded up, I will carefully mill of the excess weld and square and parallel the two flanges.

If you haven't noticed by the render, the two holes on each end that are closest to the coolant ports are very close to the tube wall. The render does not show it, but there are small radius releaf cuts milled into the tubes for the bolt heads to clear the side wall. That will be shown in the actual photos later.
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Old 07-31-2009, 09:53 PM   #77
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Default Re: Custom building a 4-53 Street Blower

Cool as always!
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Old 08-01-2009, 03:48 AM   #78
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As always nice "attention to details"
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Old 08-01-2009, 04:13 AM   #79
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Default Re: Custom building a 4-53 Street Blower

what a amazing post if i read tech stuff like this i wonder why to hell i am learned not mechanic . great
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Old 08-01-2009, 04:53 AM   #80
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Default Re: Custom building a 4-53 Street Blower

Oh boy, pls let my work look even HALF as good as this stuff.

KRAZY !!

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Old 08-01-2009, 09:20 AM   #81
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Default Re: Custom building a 4-53 Street Blower

Thanks once again guys.

The details are what's important for a build like this. If I've figured everything correctly, the manifold should go together and fit like Leggos before welding. This will make it much easier for someone else to weld, if I decide to do a "U fab" out of the manifold.

I'm thinking about getting a hold of Lain and see what's up with his blowers. Maybe we can come up with an adapter plate that will fit his 53 series blowers to my manifold. But for now, I will make one for my custom featured here.
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Old 08-04-2009, 10:52 AM   #82
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The major machine work for the intake runners has been completed. Well, except for the coolant port holes and the plenum mounting holes. We will open the coolant holes and thread them for the fittings later. This depends on what we figure out for the plumbing.

I've already started the premachine work for the plenum. It will be comprised of 3/8, 5/8, and 2 inch aluminum stock...

The Intake Runners:


Note the radius notches in the tube wall in the forth photo.
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Old 08-06-2009, 01:43 PM   #83
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The welding of the plenum is almost complete!
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Old 08-06-2009, 01:57 PM   #84
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Default Re: Custom building a 4-53 Street Blower

Quote:
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The welding of the plenum is almost complete!
So where is the picture?
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Old 08-06-2009, 02:11 PM   #85
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Default Re: Custom building a 4-53 Street Blower

Won't have one intil next week. I want to finish the thing first. Soon... Very soon...
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Old 08-16-2009, 10:47 PM   #86
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Default Re: Custom building a 4-53 Street Blower

Sorry for the long delay on an update. I was out of town for a few days...

The intake manifold is nearing completion. The plenum is now welded and machined to the size. The top plate is already machined. I just need to finish up some bolt holes, and a few other minor details.

Yes, it looks sick! (At least we think so. )

Don't worry guys. More Pictures will be posted this week. I'm guessing this Thursday or Friday.
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Old 08-18-2009, 03:53 PM   #87
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I had a chance this afternoon to snap several pictures of the adapter plate and the plenum. Obviously, the plenum is not ported for the runners as of yet. That will be completed over the next few days.

I will also be finishing the runners for the manifold. We have decided to put 1/2-14 NPT holes in the front coolant ports. The driverside rear port will be 3/8-18 NPT setup for standard SBC temp sending unit. The passenger rear will be the same as the front for the heater hose. We will be using brass 1/2 NPT to 5/8 barbed 90 degree elbows or similar for those ports. We must double check the fit before we get a final determination of which set of fittings we will actually use. It will be standard off the shelf parts for sure...

Here's a peek at the adapter plate and plenum:
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Old 08-19-2009, 04:46 AM   #88
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Default Re: Custom building a 4-53 Street Blower

DAM you do nice work that is a thing of beauty
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Old 08-27-2009, 02:32 PM   #89
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Well, here it is! What everyone has been waiting to see...

It's done with the exception of a couple of vacuum ports and the pop-off valve. The later part I still need to order. I will be finishing up the vacuum ports (2) in the rear of the plenum tomorrow.

276/291 Desoto Hemi Manifold For A 6V53 Blower:


Manifold With Adapter Plate Removed:


The runners bolt to the plenum using Stainless 5/16-18 SHCS. There will be a gasket sandwiched between. The threads will be sealed with a little RTV sealant during assembly.
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Old 08-27-2009, 07:15 PM   #90
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Default Re: Custom building a 4-53 Street Blower

OMG - Auto ART at its best - and its fora DESOTO no less.

WOW ....wimply outstanding work.

Now, how do I get to twist your arm into kockin up a tall deck 6-71 intake.

Fantastic work and craftsmanship!!

Rat
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Old 08-30-2009, 12:05 PM   #91
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Default Re: Custom building a 4-53 Street Blower

Hey Bad,

I found a surplus of 6-53 blower housings. Thought maybe you could make use of them somehow : http://www.surplusman.com/Detail.php?itemid=3691

Mark
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Old 08-30-2009, 05:41 PM   #92
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Well Rat, We've been discussing that one recently. Actually, we almost had a tall deck a little while back to work with. Falcon Bob, saw one for sale at Billet Proof. He should have bought the darn thing. I would have, but couldn't make it there...

I keep hearing that the head ports and bolt holes are the same for a tall deck. If that's the case, it wouldn't be a problem to build one from what we have so far. I just need to know the exact spread for a new plenum for the 6-71 and for the intake runners.

The manifold we have almost works for a Dodge Hemi. I had a chance to test that one out recently. New runners would have to be Fabricated along with a porting change on the plenum. Otherwise, everything else would pretty much remain the same.

This is in part why I have chosen to make the manifold a modular design. We could fab the runners as is providing that the pattern is the same. Then we could do two or three plenums for the right application for each Dosoto engine.


Octamag, thanks for the interesting link.
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Old 08-30-2009, 06:28 PM   #93
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Default Re: Custom building a 4-53 Street Blower

Wow, that came out awesome...now ya need to cook one up to put a 6v71 onto a 331 Chrysler Hemi. Not that I would have anything to gain from an intake like that
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Old 08-31-2009, 04:20 PM   #94
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Default Re: Custom building a 4-53 Street Blower

One project at a time, people. One project at a time...

We have to finish this project before we can move onto the next. I know everyone here is very excited about this. We are too! I want to see where this build will take us before we start thinking about doing this for other hemi's.

I will be resuming work on the blower pretty soon. I still have to make the front cover, the snout, the rear bearing cover, the thermostat housing, and the carburetor plate.

In the future I may post a tech segment on how to accurately measure your heads for the intake runner flanges. This would let you fellow HAMBers help us with future manifold projects that we may have. You could provide us with a set of real world measurements and drawings to go by. Does that sound like an idea?
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Old 09-07-2009, 04:56 PM   #95
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Default Re: Custom building a 4-53 Street Blower

The next piece in this project I will be working on this week is the front cover. Then I need to figure out the carb plate for two Holley 4150's...
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Old 10-05-2009, 05:34 PM   #96
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Default Re: Custom building a 4-53 Street Blower

Well, I'm back posting again... I just wanted to say that I'm currently back working on this blower project after doing some vacationing recently.

The bearing plates now have the mounting holes for the intake manifold adapter plate. The holes are 5/16 dowels and 3/8-16 heli-taps. Once, all the parts get hard coat annodized, I will be installing the inserts.

I'm currently in the process of machining the front cover for the blower.

We are going to try out a pre-made carb plate for 6-71 blower. I'm not sure how it's going to fit. We will most likely have to modify it...If it works at all. If not, at least we tried.

I should have some more photos ready to post by or before next week...
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Old 10-16-2009, 04:32 PM   #97
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Default Re: Custom building a 4-53 Street Blower

Well, we are moving forward with this project quite nicely. As with most prototyping and design work, it simply takes time.

The front cover is almost complete. I guess what's stopping me is the purchased items. I've been busy designing and machining and haven't allowed myself the time to order the parts. However, I need to do this to be able to complete the snout. I need to order the front seal and bearings.

Falcon Bob supposed to be getting a stock 291 water pump so we can get the front of the motor mocked up to determine the actual snout length. That is another thing we must do before wrapping up the snout.

Anyways... Ah... Here's some more pictures.

Project Photos:
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Old 10-16-2009, 04:41 PM   #98
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Default Re: Custom building a 4-53 Street Blower

i'll be interested in how you build the snout, what the bearings look like, the drive shaft.
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Old 10-16-2009, 07:19 PM   #99
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Default Re: Custom building a 4-53 Street Blower

This is a top notch build. From what I can see, the machine work looks to be well done, and the engineering well thought out.

The one thing I keep coming back to is the question, "Why convert this compressor section instead of buying one?"

I'm supercharger ignorant. Is there a reason that you wanted this specific compressor section, or are you just using what you have?

It just seems like a lot of work to build the conversion. If a fellow didn't have the machine tools, the skill, the material, and the time to do the conversion, would it not be more cost effective to buy a 6-71 that is already prepared to go atop an automobile engine?

What I'm asking, is whether there is any advantage to going through the non-trivial amount of trouble to convert this compressor section rather than buying a unit that was ready to go. Money VS Time? Coolness factor? Performance? Something Else? I'm just wondering, and this is a totally serious question, because I know basically nothing about all the different superchargers available. I know how they operate and all that, but the differences between the models and makes, I got nothing.

Obviously, I know that you had to build the intake regardless, 'cause it's for an obscure (or maybe better said as "non-mainstream") engine with no aftermarket support.
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Old 10-17-2009, 01:47 PM   #100
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Default Re: Custom building a 4-53 Street Blower

@Budd:

The construction of the snout will be covered later on. The design will not differ much to most standard designs. The components will consist of the snout body, front seal, the bearings and retainers, the input shaft, c-ring(s), and drive gear coupler. The sizing of the internals and design details are currently being worked out...

@CoolHand:

Your questions about converting the blower are very good and valid ones. Your right. Most people who are not willing or able to do the work would obviously purchase a unit.

We are converting the blower because that is what we have to work with. It is also imparted by the coolness factor, having access to the machinery and tooling, the unvailabilty of the parts for the application, and the knowledge and creativity we have. The conversion is a learning experience not only for us, but also for the general public. I think it's also to see if we can actually do it, and do it successfully at a reasonable cost with the "do-it-yourself" attitude in mind. We like building stuff ourselves. That's part of the fun of hot-rodding.

Up intil recently, the 53 series units have not been available for comercial resale converted for gasoline engines. Although, I have heard that there was supposed to be kits for them at one time. Not sure on that though. However, Lain Murphy now has these blower available for resale converted. There is a link in this thread for the web-site, if your interested.

As I have stated several times before, this kind of project is not for the average person. You must be willing and able to do the work. If you do choose to go this route, you will have something to go by.
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Old 10-17-2009, 04:34 PM   #101
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Default Re: Custom building a 4-53 Street Blower

Quote:
Originally Posted by BadBlownMotor View Post
@CoolHand:

Your questions about converting the blower are very good and valid ones. Your right. Most people who are not willing or able to do the work would obviously purchase a unit.

We are converting the blower because that is what we have to work with. It is also imparted by the coolness factor, having access to the machinery and tooling, the unvailabilty of the parts for the application, and the knowledge and creativity we have. The conversion is a learning experience not only for us, but also for the general public. I think it's also to see if we can actually do it, and do it successfully at a reasonable cost with the "do-it-yourself" attitude in mind. We like building stuff ourselves. That's part of the fun of hot-rodding.

Up intil recently, the 53 series units have not been available for comercial resale converted for gasoline engines. Although, I have heard that there was supposed to be kits for them at one time. Not sure on that though. However, Lain Murphy now has these blower available for resale converted. There is a link in this thread for the web-site, if your interested.

As I have stated several times before, this kind of project is not for the average person. You must be willing and able to do the work. If you do choose to go this route, you will have something to go by.
Thanks for laying it out there, that's kind of what I figured.

Please don't think I was trying to run down your project or anything of the sort. It is obvious that you all have a good handle on the mechanicals and the machine work is top notch.

And I know exactly where you're coming from on the Do-It-Yourself-No-Matter-What factor.

I'm in the midst of building an English Wheel, entirely from scratch, including the hardened 4140 anvil wheels and the elevator mechanism.

I will likely end up spending nearly the same amount on mine as if I'd bought a kit (especially if I count my time worth anything), but this one will function exactly how I want it to, be made from the parts I wanted used, and be built in the shape I wanted it in. Hell, it'll even be painted the color I want it painted too.

I know exactly where you are coming from.

This is a very cool project, and the end is result is going stump the hell out of people when they see it setting atop that DeSoto motor. That ought to be worth something all by itself.
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Old 10-21-2009, 03:38 PM   #102
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Default Re: Custom building a 4-53 Street Blower

@ CoolHand:

I didn't take your questions about our project in a bad way at all...

I've had the blower core for about four years I think. I was looking for a blower to convert for a SBC I was going to build up. The original plan was to use a 6-71 on a 350 built as a 383 stroker or even a 406. Both motors I currently have sitting in my garage.

Falcon Bob located this 6V53 blower core in West Virginia for a 100 bucks. Since the unit needed parts machined for it in order to convert it, I set it aside intil I had time to mess with it.

The whole project started when Falcon Bob found a 1955 291 CID Desoto Hemi. He knew he wanted to use this motor for a custom pickup truck project, which consists of a custom built frame and a 39 Dodge cab and box. Bob wanted to build something that was crazy and over the top, so we both played around with the idea of supercharging the little Hemi as time went on.

There is not much available in parts for either the 6V53 Detroit Diesel Blower (intil recently with Lain Murphy, but only for SBC and Flat-Head Ford applications) or the Desoto Hemi. Since both pieces are sort of rare odd balls in the hot rod seen, we decided that this would be the perfect project to build totally custom. So, your exactly right! It would be really something that nobody has ever seen.



The project is still going quite nicely. I am finished with the carburetor plate for the blower. Can you say dual Holly 4150's?

I am currently working on the crank pulley for the motor. Instead of using a cog style setup, we are going with a nostalgic double v-belt design. So, we are using a SBC 3 groove pulley at the crank. The inner groove will be used for the accessories, and the two outer grooves are for the blower. That is if everything works out right.

What do we have left? The rear cover of the blower, the tensioner pulley and bracket, and the snout/drive assembly. The snout will be finished once we determine it's length.

I should have more photos to post pretty soon!
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Old 10-22-2009, 07:18 PM   #103
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Default Re: Custom building a 4-53 Street Blower

I was going to wait to post when I had the more pictures, but I had some information about the crank dampener that may prove useful to some.

The bolt holes used for the pulley on the dampener is 6 holes on a 2.812 BHC. The interesting thing is that one of the holes is rotated 5 degrees from the rest of the holes. It's still for a 2.812 BHC, but just rotated. I believe this is so you couldn't mount the pulley on the dampener backwards. So it's 0, 60, 120, 180, 240, 295 degrees...

Here is a photo of my handy work converting a 3 groove SBC crank pulley to a Desoto. The other photo is actually a drawing for people who need help with the dimensions of the holes.
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Old 10-22-2009, 08:34 PM   #104
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Default Re: Custom building a 4-53 Street Blower

Okay. I have some questions about this hub or dampener. I was thinking about this thing after I made the last post.

We got this part with the motor. I have no idea if it's the stock piece or not. Besides the odd bolt pattern, it has 5/16-18 holes in it. Are we missing something here? This particular piece doesn't have any timing marks on it either.

We even looked up several dampeners from Hot Heads to see what they had to offer. They have three versions; a stock replacement, a fluid version for blowers, and a SFI approved steel for blowers. The last two have timing marks that we could see. We didn't want to go buy one unless it absolutely warrants it.

Does this piece look like the stock version or is it an old aftermarket piece? Not sure on this because we never built one of these motors before.

There are numbers on the back: N2 127660 1735045

Here's a photo of the darn thing:
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Old 10-24-2009, 02:12 PM   #105
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Default Re: Custom building a 4-53 Street Blower

Thanks for posting! Great work.
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Old 10-24-2009, 03:48 PM   #106
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Default Re: Custom building a 4-53 Street Blower

Yes BBM, that is stock for the 276/291. I have several just like it. Steven.
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Old 10-26-2009, 07:16 PM   #107
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Default Re: Custom building a 4-53 Street Blower

@ Power58:

I'm assuming that the bolt hole dimensions were of some help to you. I kind of figured that someone would get use out of that.

@ Bullrack:

Thanks for the info about the dampener. I figured that it was probably a stock piece, but I just wanted to double check.



I should be finishing up the rear cover and the drive gear coupler for the blower this week...

The rear cover functions as a rear bearing retainer and dust cover. The cover will be gasketed to ensure it seals against the rear bearing plate and it has the same bolt pattern as the front cover. Other than that, it's mostly for looks.

Here are some more photos of our progress:
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Old 10-27-2009, 03:29 AM   #108
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Default Re: Custom building a 4-53 Street Blower

All I can say is "DAM that looks good" one more time. Can't wait until you get it on a running engine.
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Old 10-28-2009, 04:47 PM   #109
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Default Re: Custom building a 4-53 Street Blower

I'm glad your enjoying the photos...

And Yes! More photos:
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Old 10-29-2009, 07:34 PM   #110
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Default Re: Custom building a 4-53 Street Blower

I'm currently working on the drive gear coupler.

I wanted to cover the basic parts of the snout design. The snout I'm building for my blower shouldn't be much different to most designs currently used.

Parts:

1 - 6061-T6 Aluminum Snout Body
1 - 25 mm dual lip w/ spring seal (62 mm dia. X 7 mm thickness)
2 - 20 mm 5200 light series sealed duplex bearing (20 X 47 X 13/16)
2 - 4150 moly steel bearing retainers (6 bolt design)
1 - C-ring clip
1 - 4150 moly steel input shaft (drive diameters 25mm to 20mm to .750 spline)

I'm basically going to build it similar to a machine spindle. Some of the details on the dimensions are pending...

The bearings are double sealed and are rated for about 4700 lbf dynamic load, 2700 lbf static load, and 9000 rpms with grease. This should be adequate for our purposes. You could also substitute a 5300 medium series bearing. It's a little bit heavier, but the difference is not that much to worry about. We probably wont run this blower much over 8000 rpms (if that) anyways. If it does go up to or over 9000 rpms, it wont be for very long. We have to remember that we are pushing a 2200 lbs vehicle around with this motor.

Both front and rear bearings will press into a held bore and are kept in place with the steel retainers. Both bearing bores will be concentric within .001 of and inch. The thru hole will be clearanced for the 20 mm shaft section (probably .875 dia. or so).

The front seal will press into a 67mm X 7mm bore. The shaft diameter here is at 25mm. There will be a shoulder between the two diameters that rides against the front bearing inner race. The c-ring will retain the shaft at the rear bearing inner race.

Except for the physical dimensions, it is not much different than what would be used on a 6-71 blower snout.

I'm waiting to do the snout intil we know the exact length. I guessing that the snout should be about 5 or 6 inches in total length.

Here is a photo of a 6-71 input shaft and coupler:
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Old 11-04-2009, 03:18 PM   #111
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Default Re: Custom building a 4-53 Street Blower

All the machine work for the new billet rotors have been completed. Yes, each set of rotors and shafts are lighter than the stock pieces. They are 2.25 lbs lighter per set for a total of 4.5 lbs total.

However, the shafts still need to be ground, splined, and pin hole drilled and reamed. That will be taken care of after anodizing due to the small amount of surface building that takes place. This is usually .0002 to .0008 during the normal anodizing process. We desire a metal to metal press fit to no more than .0002 press.

Each rotor has four 5/16 lock pins which are pressed thru the rotors and shafts. There will be two pins drove from one side and two pins drove in from the opposite side in a blind flat bottom hole, which is fully reamed to press diameter. This should help keep things really secure and minimize unbalanced weight. This means that each pin will be driven into the holes down to a 1.300 inch depth and not all the way thru the rotor. The pins will fully engage the rotor pin hole to depth on the other side of the rotor shaft more than .125 inch. Then the pin will be locked in with a flat head screw with a little bit of thread locking compound. The rest of the balancing issues will be addressed later during the dynamic balancing of the assembled parts.

Hopefully you can understand what I've just said.

The pins haven't been taken to length yet. Just in case your wondering...

Here's some photos of the work:
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Old 11-04-2009, 03:34 PM   #112
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Default Re: Custom building a 4-53 Street Blower

Boy you are going to have some real satisfaction when you mash down the go pedal on this one!!! Spectacular stuff. Are you going to pin the rotors to the drive gears? Sorry if you have previsouly explained that I have not gone back and studied. Thx.
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Old 11-04-2009, 03:35 PM   #113
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Default Re: Custom building a 4-53 Street Blower

So, will you sell a guy endplates? that back cover looks NICE!
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Old 11-04-2009, 04:04 PM   #114
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Default Re: Custom building a 4-53 Street Blower

Why not drill and ream the pin holes thru, then countersink both sides, and use two keeper screws.

That would not only positively retain the pins, but solve your balance issues (or very nearly so).

Any particular reason why you're wanting to go with a single keeper? Is it just to keep the weight down?

EDIT: I may have asked this before, but how were those rotors made? Extrusion? Cut from bar stock? Something else?

If you machined them from bar stock, how did you cut the hollows in the ends of the lobes? Or for that matter, the center shaft hole? Long bores like that are always a bitch to bore accurately, so I'm always interested in seeing how different guys go about doing it.
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Old 11-04-2009, 04:38 PM   #115
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Default Re: Custom building a 4-53 Street Blower

@ Tudor:

The rotor shafts will be indexed and splined to match the drive gears. On The driven side (left facing front), there will be a .25 thick ground steel washer that seats down inside the gear that has a thru hole for a 3/8-24 bolt for the end of the shaft, which holds the gear in place (near stock configuration). On the drive side, the coupler bolts to the front of the drive gear with four 1/4-28 bolts and one 3/8-24 center bolt which is also piloted. So, to answer your question... The gears are indexed, splined, and bolted into place on the shafts.

Although the coupler is not complete, here's a pic. I hope it helps.


@ Tman:

I could possibly do that. Is this for your 4-53?

You would have to have your stock rotor shafts reground to 20 mm to accept bearings (5200 light series duplex front and standard deep grove radial for rear). Then you would need a front cover, bearing plates, rear cover, bearing retainers, thrust washers, and possibly shaft wear rings.

I haven't even included a snout either. That depends on what your doing or if you plan on adapting and existing. I know a 192/250 powercharger snout goes for around $770.00 from The Blower Shop online. That's not including pulleys and tensioner I think.
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Old 11-04-2009, 04:47 PM   #116
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Default Re: Custom building a 4-53 Street Blower

I would be good with just the plate
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Old 11-04-2009, 05:57 PM   #117
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@ Coolhand:

We played around with the idea of using double screws. There are several reasons why we chose this single screw design.

We wanted to be able to use "off-the-shelf" parts as much as possible especially when it comes to fasteners in this build. We are using 5/16 X 1.5 case hardened pull dowels cut to 1.300 length with 10-32 flat head alloy screws. If we used two screws, we would have to make custom pins with threaded holes on each end, which would also require grinding the diameters. Would that out of the realm of possiblilties? Absolutely not.

However, the head size of the screw is about .377 diameter X .130 long at 82 degrees included angle. The dowel is .313 diameter. The wall thickness between the shaft bore and the valley of the rotor is 1/4 inch. If we reamed the hole all the way thru, that would only provide about .120 inch on each side for the pin to engage the hole in the rotor. This is not to mention that you would lose at least 2/3rds of the chamfer for the flat head screw.

Are method allows for full pin to bore engagement at least on one side in the rotor and .125 seated on the other side, while still giving us the full chamfer for the screw head. The chamfers double as a locator and as a strong clamping point due to more surface area.

We also did the opposited pinning for two reasons. First, to minimize stress in the design. Two, to equalize weight distribution.

Yeah, we could have just reamed the holes thru and just pressed the pins in, but I wanted a bit of insurance that they were not going anywhere...

As for the rotors, they are CNC machined from billet solids using the original rotors for measurements. Measurements were taken on a CMM.

The bores were indicated centerline. Center drilled, drilled, bored (Criterion head and 5 inch long boring bar) leaving only about .005 in hole, and Wickmen Reamed to size. Wickmen reamers are nice because they cut really straight and leave an excellent surface finish especially in aluminum.

The bore is only held to about 5 inches in depth of the material. The remaining 3 inches or so is actually clearanced to about .010 over the bore size in order for the shaft to slip all the way thru. Bores are inline within .001 concentricity.

Does this answer your questions?


@ Tman:

Just the bearing plates? Or rear cover?
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Old 11-04-2009, 06:11 PM   #118
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Default Re: Custom building a 4-53 Street Blower

CoolHand, if you need more information about how to machine and bore deep pockets and holes, leave me a PM. I would be happy to help.
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Old 11-05-2009, 09:51 AM   #119
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Default Re: Custom building a 4-53 Street Blower

Sorry, I have bearing plates. Just rear cover.
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Old 11-06-2009, 11:01 AM   #120
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Default Re: Custom building a 4-53 Street Blower

We've been watching and following what 345 Desoto has done with his 291 Desoto blower motor. I must say it's has been very informative for us as far as what choices there are for motor internals. Well, at least the cam and lifter options we could go with.

Falcon Bob has been in contact with Donny Johansen for the last couple of weeks. It looks as though Donny will be grinding a hydrualic roller cam for our motor.

I don't know all the details as of yet, but it looks like we will be running the cam along with the same LA style lifters 345 Desoto used, and a set of custom length hardened push rods. Of course, this means doing the same clearance grinding to the lifter access holes that 345 did on his 291 motor. Well, unless someone tells us differently.

I guess from talking with Falcon Bob, the cam specs are pretty fat. Donney will be grinding us something that's really crazy. Bob seems to think we need to go with a set of custom Ross forged slugs fitted to the new cam specs. I guess there may be a valve clearance issue he's worrying about.

We also decided to upgrade the old stock crank hub to a fluid dampener setup. Might as well after doing all of this work so far... I also suggested going with a different crank pulley. I think the one we are using may be too big for our purposes. I only plan to overdrive this blower to only about 10% anyways.

Once we get all the cam and valvetrain issues worked out, I will be posting a complete detailed list of components and proceedures.
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Old 12-08-2009, 07:20 PM   #121
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Default Re: Custom building a 4-53 Street Blower

Just to let everyone know. We have sort of put this project on hold due to the hunting/holiday season. We will be resuming work after the new year. I will be checking the thread periodically during this down time. So, if you have any questions, suggestions, or comments, feel free to post'em.

Thanks,
BBM
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Old 01-22-2010, 04:30 PM   #122
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Default Re: Custom building a 4-53 Street Blower

Project is still on hold. It's not that I've abandoned the project. I'm waiting for pulleys for the front of the motor and some its internals (like the cam and lifters). I don't know when this will be since Falcon Bob is handling this.

So, please be patient for new updates...
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Old 03-13-2011, 12:49 AM   #123
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Default Re: Custom building a 4-53 Street Blower

any news
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Old 03-13-2011, 03:43 AM   #124
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Default Re: Custom building a 4-53 Street Blower

It's coming out beautiful man...


that back cover is the cats meow. tits on a ritz
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Old 03-13-2011, 04:49 AM   #125
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Default Re: Custom building a 4-53 Street Blower

Im REALLY glad im learing to be a cad jockey now!
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Old 04-13-2011, 06:13 PM   #126
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Default Re: Custom building a 4-53 Street Blower

like your blower i am working on one i just would like to ask if you know were i can buy a set of rotor gears mine have the same part #k-5107083 need the other side and the rear retainer if you dont mine helping me thanks coyote 393
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Old 05-05-2011, 07:18 PM   #127
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Default Re: Custom building a 4-53 Street Blower

Unfortunatlely, I've had to temporarily mothball this project. It's currently sitting in my garage collecting dust.

It seems life has done a complete 180 for Falcon Bob and I over the last year and a half. For personal reasons, this required us to shelf the project.

Worry not my friends! I've recently have been reviewing some of my blueprints on the unit. I hope to be able to complete the unit soon.

This my to do list:

1. Spline rotor shafts - drill and ream for lock-pins holes
2. Finish snout internals - front seal and bearing bores, input shaft, and bearing retainers
3. thermostat block for intake manifold
4. pop-off valve for intake manifold


@ Coyote 393

Note sure I could be of any help on that. What type of blower is it? You could probably contact Lain Murphy and see if he has any ideas.
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Old 05-06-2011, 11:16 PM   #128
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Default Re: Custom building a 4-53 Street Blower

Looks great, these blowers worked fine for tons of miles as designed stock. You should have made a helix set of rotors if you were going to this much work, overdriving that blower that much is gonna make some hot air, how about you build a intercooler ?
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Old 05-06-2011, 11:45 PM   #129
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Default Re: Custom building a 4-53 Street Blower

How about building a new blower case that is water jacketed?
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Old 05-07-2011, 12:29 PM   #130
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Default Re: Custom building a 4-53 Street Blower

Yes, I know you can run these units stock. This is not a stock build. It's a custom build. Hence, the thread title.

The Weind/B&M - Holly 142/144 and 172/174 units took many design queues from these very units. Those are fully capable of running in the neighborhood of 8000 to 10000 rpms with little trouble. However, somewhere between 10% and 20% over-drive would be usual in most cases.

I actually looked into possibly making helical rotors at one point. There is special software for aiding in the number crunching, and depending on the profiles of the rotors, it may even require specialized cutters that are custom ground. Although it's not impossible to produce, it does require much more time, money, labor and engineering for a one-off or even a small limited production run. Besides, the straight two lobe design works well enough for our purposes.

An intercooler wouldn't be too much trouble to produce. That can be something we could consider at a later date, if need be. A new case probably not!


Although this is for industrial compressors, the principles are the same. Not exactly a light read! This is a link containing technical information and demo software for screw type rotor engineering: http://www.staff.city.ac.uk/~sj376/anim1.html

Last edited by BadBlownMotor; 05-07-2011 at 07:25 PM.
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Old 05-28-2011, 05:06 PM   #131
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Default Re: Custom building a 4-53 Street Blower

I'm back on the project!
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Old 05-28-2011, 05:18 PM   #132
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Default Re: Custom building a 4-53 Street Blower

Awesome work!!! Those blower cases look really good with the horizontal rib milled off
leaving your verticals.
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Old 05-28-2011, 05:37 PM   #133
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Default Re: Custom building a 4-53 Street Blower

Yeah, I've seen that done to the cases before. They do look good that way! Falcon Bob and I want to leave some of it stock just as a throw back on the original. Heck, we even thought we would paint the case section the original green and make the rest a dark gray annodized finish. We are tired of looking at all the polished aluminum everyone runs with. After all, it will be an old looking custom we are putting this on.
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Old 06-03-2011, 06:01 PM   #134
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Default Re: Custom building a 4-53 Street Blower

Hopefully within the next couple of weeks I can get the shafts ground and then get them out for splining. My shop where I work as gotten pretty busy lately, which is a good thing, but it limits my time to work on this project.

It looks like around a 100 bucks a piece to have the rotors dynamically balanced up to 10,000 rpms. This is unless material (tungsten) has to be added in the balancing, which then it's added material cost. I will know more when I get them over to the balancing shop. I'll try to get some photos of the balancing process for here also.

I'm kind of at a temporary stand still with the snout. I need to get over to Falcon Bob's garage to do one last blower mock up. This will allow me to get a good handle on what I need for the length. Once I get the length in the ball park, it won't take long to finish it up. Doing the last mock up will let me see how I need to design the thermostat housing, and the blower belt(s) tensioner as well. Neither Falcon Bob or I has had time to breathe lately with all the things we have going on right now.

Just keep an eye out for further posts...
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Old 06-10-2011, 02:26 PM   #135
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Default Re: Custom building a 4-53 Street Blower

Just curious... Would anyone actually want to pay for a set of complete blueprints to this custom blower and/or intake manifold?
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Old 10-09-2011, 07:47 PM   #136
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Default Re: Custom building a 4-53 Street Blower

I just stumbled across your pictures of you building a blower for a 291 DeSoto. Very nice. Did you ever get it completed? I am putting a 291 in our Roadster. Are you making the blowers? Does anyone make a manifold for a blower for a 291. Just wondering. Thank you. Barney Moran
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Old 10-09-2011, 08:11 PM   #137
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Default Re: Custom building a 4-53 Street Blower

I just stumbled across this thread. Very cool project in taking and building your own parts.

BBM - great work!
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Old 10-09-2011, 08:46 PM   #138
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Default Re: Custom building a 4-53 Street Blower

For once I am speechless.
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Old 10-09-2011, 09:12 PM   #139
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Default Re: Custom building a 4-53 Street Blower

Quote:
Originally Posted by BadBlownMotor View Post
Just curious... Would anyone actually want to pay for a set of complete blueprints to this custom blower and/or intake manifold?

Well, I don't have a hemi, but if you ever do one for a Caddilac flathead, or a Jimmy 302......

Dude, this thread really rocks!
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Old 10-10-2011, 06:20 AM   #140
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Default Re: Custom building a 4-53 Street Blower

I'm curious would this kind of end plate fit the 4-53 too?
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Old 02-03-2013, 11:53 AM   #141
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Default Re: Custom building a 4-53 Street Blower

Yeah. Sorry for such a long delay in posting and responding on here.

I guess I must offer a reason and apology to the people who were and are interested in this project...

I was hoping to have a completed and running motor back in 2009/10, but that didn't happen. The project got mothballed for many reasons. I got married, I had a death in my family, and I had possible long term unemployment looming in my future at the time just to name a few of those reasons that I had myself. Falcon Bob was ill for a while and later had a baby on the way. I myself was hoping to finish the blower portion of the project back in late 2011, but I really didn't have the time or resources to get it done.

It's only now that I actually have had some time to look the build over to see what needs to be done, and I'm finding a lot actually needs to be done.

First of all, this thread needs a lot of work in order to fix missing photos of the project. The website that hosted the photos is no longer in service. I do have all of the photos of this project on backed up. I may just start a brand new thread covering both past efforts and future progress. I don't know exactly when that will be.

Second, even when I get back to fabricating and machining the remaining parts, it will most likely be at a much slower pace than before. My job does not allow me unlimited machine time for my personal projects. For this reason I'm almost inclined to do a final assembly thread instead of a play-by-play on the fabrication.

In the mean time I will check in and try to answer any questions you may have...

@Chrisp:
I'm sure my bearing plates would fit a 4-53. I believe there is not much difference other than case and rotor length if I recall correctly.
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Old 07-07-2013, 07:20 PM   #142
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Default Re: Custom building a 4-53 Street Blower

It's been a while since anything has been posted here. Progress is slow with this blower project because of limited machine time
I have now. I only have a few parts left to machine and alter before the grinding work can begin. Whenever I finish the blower,
I want to start a new thread about it's assembly with all photos included. Below is the current status of the project...


Parts Completed To Post Date:


Intake Manifold:
1- 276/291 Intake Manifold Runners (both left and right side)
2- 276/291 Intake Plenum (All ports: runners, boost, and pop-off)
3- Custom 6V53 (Not stock) Blower manifold top-plate


Blower Section:
1- Front Gear Cover (Includes: Oil fill/drain holes, oil sight glass, and snout bore)
2- Front and Rear Bearing Plates
3- 6-Bolt Bearing retainers
4- Rear Bearing Plate cover
5- Original 6V53 (Case Milling/porting/recoil/re-doweling)
6- Billet Rotors (Machined and anodized to pre-assembly state)
7- Drive Gear Coupler
8- Rotor Shafts
9- Gears (Orignial Stock; Have new ones on order in case of bad backlash)
10- Rear Shaft-To-Bearing Locks

Snout:
1- Snout Body
2- 6-Bolt Snout Bearing retainers



Parts That Need Machining To Post Date:


Snout:
1- Snout Input Shaft


Blower Section:
2- Slave Gear Support Plate
3- Slave Gear Timing Adjustment Washer



Parts That Need Alteration To Post Date:

Blower Section:
1- Drive Gear Coupler
2- Rotor Shafts (Resizing bearing diameters to 20mm for better bearing selection; MRC 5204CZZ & 204SZZC)


Extra Note: We will be using purchased 6061-T6 pulleys for the crank and idle in a double V setup. The blower will be a custom pulley That I will machine myself. 5.2 Crank and 4.0 Blower = 1.3:1 ratio at 6000 motor = 7800 blower. Carbs are E85 compatible.

Last edited by BadBlownMotor; 07-07-2013 at 07:38 PM.
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Old 07-08-2013, 05:44 AM   #143
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Default Re: Custom building a 4-53 Street Blower

Thanks for the up date!!
(& extra info :-))
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Old 07-08-2013, 06:58 PM   #144
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Default Re: Custom building a 4-53 Street Blower

I'm posting some information here about part sources for Detroit Diesels. I remembered that someone had asked me about gears before. I wouldn't say it's a cheap source, but a source none-the-less. I'm still looking for sources. If anyone has a good source for new or used parts for these blowers please post' em.

Detroit Diesel Parts:
http://www.powerlinecomponents.com/

6v53 Gears More Specifically:
http://www.powerlinecomponents.com/c...e=96&section=3

The one thing I don't understand is why there is such a big difference in price on there for the R.H. gear versus the L.H. gear. Must be part availability I guess. Btw, if you need a 6V53 R.H. Gear (5107083), you can get it on eBay less than $15.00 right now as I post this.


The following information may be of use to anyone wanting to rebuid a 6V53 blower. I pulled this info out of an old 1975 manual...

Here are the 6V53 gear and rotor clearances:

Blower Timing Gear Backlash: 0.0005 to 0.0025 wear limit 0.0035
Rotor To Inlet Clearance: 0.0100
Rotor To Outlet Clearance: 0.0040
Rotor to Endplates: 0.0080
Trust Plate To Thrust Washer: 0.0010 to 0.0030
Clearance Between Rotor Lobes: 6V53 0.0090 6V53T 0.0130

Last edited by BadBlownMotor; 07-09-2013 at 03:37 PM.
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Old 07-08-2013, 07:10 PM   #145
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Default Re: Custom building a 4-53 Street Blower

I have a 6V-71 [so I was told] sitting on the shelf for years, how would it compare to the 6V-53 as far as usablility?
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Old 07-08-2013, 07:23 PM   #146
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Default Re: Custom building a 4-53 Street Blower

A 6v71 should be very usable. That's the one with the angled bolts on the case. I've seen other people post projects they did on-line using a 6v71. Give her a try.
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Old 07-08-2013, 11:32 PM   #147
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Default Re: Custom building a 4-53 Street Blower

I had thoughts years ago but they went by and the damn thing is pretty heavy and don't feel up to fooling with it..Its a factory rebuild; I think I'm going to look to sell it.
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Old 07-09-2013, 04:32 PM   #148
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Default Re: Custom building a 4-53 Street Blower

I need to get some information on the helical gear sets for the 6V53. I hope someone can help me with this.

The 6V53 blower I have uses 5128599 and 5128600 helical gears. The center-to-center dimension is at 3.000 inches.

The 5107083 and 5107084 helical gears appear to have induction hardened teeth which probably means 4340 chrome moly steel material. Can anyone tell me with accuracy what the center-to-center dimension is for a 6V53 blower that uses 5107083 and 5107084 helical gears? These gears also appear to have more teeth. Are these gears any quieter than the other set?
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Old 07-10-2013, 04:08 PM   #149
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Default Re: Custom building a 4-53 Street Blower

I contacted PC Industries and all they could tell me was that they were the newer style gears that have more teeth which does make them quieter and everything else should be the same. I guess I'll order the L.H. gear and check them myself. I'll post back later with my own answer...
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Old 07-10-2013, 04:33 PM   #150
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Default Re: Custom building a 4-53 Street Blower

Dyers did some stuff with the 6v71
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Old 07-14-2013, 03:21 PM   #151
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Default Re: Custom building a 4-53 Street Blower

There are manuals you can buy on-line for any of the Detroit Diesels. I know because I bought one for the 53 series myself. If you do a little digging around you can find info on them without a purchase. Below is a link to one of those sources.

How to time a 6v53 Detoit Diesel Blower:
http://books.google.com/books?id=9Qo...timing&f=false
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Old 07-22-2013, 04:33 PM   #152
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Default Re: Custom building a 4-53 Street Blower

It appears that both sets of gears offered for the 6V53 blower have the same pitch diameter. The newer 5107xxx style gears will not fit the rotor shafts using the older style 5128xxx gear set. If you were to fit them, it wouldn't be without shearing material off the shaft spline which I don't recommend. My rotor shafts will be match to the newer gear set so I don't have to worry about that.

The advantage to the newer gears is that they are quieter, stronger, and should wear a lot longer than the older style gears.

New Style Top: 5107084 (L.H.), 5107083 (R.H.)
Old Style Bottom: 5128600 (L.H.), 5128599 (R.H.)
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Old 07-28-2013, 10:23 AM   #153
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Default Re: Custom building a 4-53 Street Blower

I thought I would post some information about calculating weight of materials.

If performance and fuel mileage is important in your latest build, you might want to keep track of the weight of the vehicle during the fabrication process. You don't actually need to put it on a scale to have a good idea about how much the vehicle weighs.

Materials have a density that can be commonly measured in standard cubic inches or metric cubic centimeters. Once you know the material density, you can calculate it's weight by a few simple formulas. You can look up material density elsewhere online and it covers a wide range of materials from aluminum, steel, brass, wood, plastic and more.

Formulas:

Flat Stock: Density x Width x Height x Length = lbs or Kg

Example: 6061 Aluminum .098 standard (.271 Metric)

.098 (lbs cubic in.) x 6 in. x 8 in. x 24 in. = 112.896 lbs

Round Stock:

Standard in Inches: Density (lbs cubic in) x Diameter inches squared x Length inches x 3.1416 / 4
Metric in Kilograms: Density (g cubic centimeter) x Diameter in millimeters squared x Length in millimeters x 3.1416 / 4000
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Old 08-06-2013, 09:26 AM   #154
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Default Re: Custom building a 4-53 Street Blower

I'm posting a quick progress report on the blower project.

I have finished up most of the machine work. I just have a few small odd-n-ends and minor alterations to finish up.

I've been in regular contact with the gear and spline shop which whom I'm farming the shafts and coupler out to. This is to ensure I have the correct ID and OD dimensions before they receive the parts for splining and broaching.

Grinding will begin this Saturday the 10th. Well, at least it's the plan anyway. Afterwards, it's off to the gear and spline shop before pre-assembly can begin.

I'm going to start a new thread when the final assembly begins.
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Old 08-06-2013, 09:45 AM   #155
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Default Re: Custom building a 4-53 Street Blower

Theres omething real cool about a homemade blower...
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Old 08-06-2013, 12:52 PM   #156
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Default Re: Custom building a 4-53 Street Blower

It's a definite learning experience that's for sure!
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Old 08-29-2013, 06:51 PM   #157
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Default Re: Custom building a 4-53 Street Blower

After nearly a months worth of delays, the grinding is currently in progress and should be finished by tomorrow. After the shafts are splined, I have to index, drill and ream the rotor lock-pin holes and install the shafts into the rotors, then turn or grind the rotor tips to the final diameter.
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Old 09-05-2013, 03:18 PM   #158
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Cool Re: Custom building a 4-53 Street Blower

I don't think I need to say more...
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Old 09-14-2013, 03:30 PM   #159
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Default Re: Custom building a 4-53 Street Blower

I'm posting yet another update to the project.

Pretty much all the grinding has been completed with the exception of a couple of bushings and "grind at assembly" stuff.

This past week I've been doing some preliminary checks and test fitting various parts to see if there is anything I need to address before assembly. So far everything has been meeting or exceeding expectations.

This coming week the shafts should be shipped out for the splines. The last major operation will be to drill and ream the rotor shafts for the lock-pins. The splines have to be done first before the holes can be drilled because orientation has to be maintained for rotor timing.

My plan right now is to take a day off in October and use that day to work on the blower in the shop. This will hopefully be the last major push to get things done. This does not mean I will be totally finished with the project. We have pulleys and brackets that need to be made or modified to fit the motor/blower setup. I'm sure there will be some more things that will crop up and that's just part of building stuff yourself.

Even though I want to save pictures for the future assembly thread, I couldn't resist showing a mock-up of the front which is the snout, snout bearings, input shaft, and front cover. Yeah, I didn't install the bearing retainers or the front seal on the snout, but you get the idea. The front end of the input shaft is left undecided until we know what type of pulleys we really want to go with.
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Old 09-23-2013, 04:23 PM   #160
BadBlownMotor
Grenade Inspector
 
Join Date: Mar 2009
Location: Michigan
Posts: 109
Default Re: Custom building a 4-53 Street Blower

As always, there is a delay in getting the splines and serrations done on the shafts. It turns out that the gear and spline shop has to rent the tool to cut the rotor shaft splines and there is an extra charge for it. So, I've been going back-and-forth with them about the pricing to do the job, but I think we've come to an agreement on the price finally. Hopefully they will be done early next week.
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Old 10-03-2013, 04:43 PM   #161
BadBlownMotor
Grenade Inspector
 
Join Date: Mar 2009
Location: Michigan
Posts: 109
Default Re: Custom building a 4-53 Street Blower

I know I keep saying it, but I just have a few more things to take care of on the blower portion of this project and she will be ready for preassembly. What does the preassembly involve? It means final fit and finish which includes timing the rotors and making sure all tolerances are within spec. Once all of that is finished I will spend a bit of time polishing and cleaning up the aluminum parts before sending them off for anodizing.

Until next time here are some sneak preview pics... Watch out for a new thread for the final assembly!
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