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Projects Potvin Blower On A Studebaker V8

Discussion in 'Traditional Hot Rods' started by 60elky, Aug 7, 2020.

  1. 60elky
    Joined: Dec 19, 2008
    Posts: 57

    60elky
    Member

    I have made serious progress on the Studebaker "Potvin" project. All the parts are fabricated by me so far, in stainless steel. It is actually slightly lighter than if it were cast aluminum. It will be modern port EFI. The block and blower case you see are hollow and are just for mock-up. The casting connecting the blower and block is actually wood in this picture but an aluminum replacement is in the works. The distributor is an MSD off-shore knock-off of an MSD so all MSD components fit it including a rotor you can "phase", (needed for modern EFI). Note, they never made one for a Stude. The 471 Detroit blower will boost the 299 inch motor 7 -9 PSI, modest but we can always bump it up with the next series blower, 672, 871, or? You can see more detail on "Racing Studebakers".

    JK
     

    Attached Files:

  2. Paul
    Joined: Aug 29, 2002
    Posts: 16,387

    Paul
    Editor

    Very cool
     
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  3. 55zephyr
    Joined: Sep 5, 2013
    Posts: 126

    55zephyr
    Member

    I do like that!
    good luck, Ron.
     
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  4. mgtstumpy
    Joined: Jul 20, 2006
    Posts: 9,214

    mgtstumpy
    Member

    What's it going into? Thinking outside the box!
     
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  5. It looks better than any Potvin set up.
     
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  6. koolbeans
    Joined: Apr 12, 2015
    Posts: 633

    koolbeans
    Member

    Very nice. Great for a Bonneville Stude?
    Injection in the top of the blower or in the port? Just curious.

    Sent from my XT1710-02 using The H.A.M.B. mobile app
     
    Last edited: Aug 10, 2020
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  7. FrozenMerc
    Joined: Sep 4, 2009
    Posts: 3,093

    FrozenMerc
    Member

    Very Cool!
     
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  8. PotvinV8
    Joined: Mar 30, 2009
    Posts: 408

    PotvinV8
    Member

    Very cool setup! One thing to consider that wasn't mentioned is that blower is going to get hot it there's no fuel going through it. On my Potvin setup, it's port injected as it looks like yours is as well, but I added two injectors in the Hilborn hat atop the blower to cool the rotors. Anyways, just an observation. Keep at it and keep sharing the progress.
     
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  9. 60elky
    Joined: Dec 19, 2008
    Posts: 57

    60elky
    Member

    Here is the 3D model of the adapter, the key to the whole project.

    JK
     

    Attached Files:

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  10. 6sally6
    Joined: Feb 16, 2014
    Posts: 2,459

    6sally6
    Member

    I am honored to be on a web board with such talented guyz!.........No shit.
    6sally6
     
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  11. Black Panther
    Joined: Jan 6, 2010
    Posts: 2,133

    Black Panther
    Member
    from SoCal

    That's a work of art! Excellent work.
     
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  12. nochop
    Joined: Nov 13, 2005
    Posts: 3,818

    nochop
    Member
    from norcal

    I have no words
     
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  13. Outstanding!
     
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  14. aircap
    Joined: Mar 10, 2011
    Posts: 1,748

    aircap
    Member

    Two big thumbs up from me.
     
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  15. Hot Rods Ta Hell
    Joined: Apr 20, 2008
    Posts: 4,670

    Hot Rods Ta Hell
    Member

    Wow, beautiful!
     
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  16. mgtstumpy
    Joined: Jul 20, 2006
    Posts: 9,214

    mgtstumpy
    Member

  17. 60elky
    Joined: Dec 19, 2008
    Posts: 57

    60elky
    Member

    I have made some progress on the project. I had the adapter 3D printed in plastic and it all fits together nicely. I have the adapter out for quote to be machined in 6061 aluminum. Getting closer to spinning it on a motor. "Plastic" adapter photos attached. 20201216_184831_resized.jpg 20201216_184855_resized.jpg
     
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  18. Kevin Pharis
    Joined: Aug 22, 2020
    Posts: 512

    Kevin Pharis

    I may own a Stude, but I am far from an expert on this subject. For those that are more in the know... why would the blower run hot without fuel on the rotors...? Aren’t the Detroit blowers designed for a direct injected diesel engine...? Not to mention designed to last 1,000,000 miles...
     
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  19. Tim
    Joined: Mar 2, 2001
    Posts: 17,096

    Tim
    Member
    from KCMO

    Any progress?
     
  20. PotvinV8
    Joined: Mar 30, 2009
    Posts: 408

    PotvinV8
    Member

    Compressing the air causes heat. Grab the outlet pipe on your air compressor the next time it cycles off and you'll see what I mean.

    In stock form, a Roots blower is doing just that, blowing fresh air into the combustion chamber; it doesn't create any pressure in the form of boost. This is why a turbocharger is added to a "blown" Roots diesel engine; to actually provide boost, which the Roots blower is not doing.

    When you take a blower off a diesel application and spin it 3X the speed it was meant to turn, more air is moved, pressures increase, heat is created, and, hopefully, boost. If we spun the blower at diesel speeds, say under 2,000 rpm, it wouldn't need to be cooled, but it would also be incredidibly inefficient, negating its use.

    Lastly, any heat created in the induction side negatively affects the engine's ability to make power, so cooling the incoming charge is nearly always beneficial. So, adding fuel through the blower serves to not only cool the blower, but the incoming charge as well, similar to what water/meth injection or an intercooler accomplishes.

    Others can probably add to this, but that's my simplified explanation as my simplified brain can put to words.
     
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  21. jimmy six
    Joined: Mar 21, 2006
    Posts: 14,801

    jimmy six
    ALLIANCE MEMBER

    Teflon seals help too.
     
  22. And with teflon seals, they need to be lubricated - so you'll always have some fuel in the hat (top of the blower) - with down-nozzles (port nozzles) as well if you're running alky, nitro, etc.. The other big reason for port nozzles is to have more control over fuel-distribution to all the cylinders. When everything is "mixed through the blower", the air/fuel mixture tends to be pushed to the back of the blower. On modern race-type blowers (think 14-71 Kobelco/Fowler, etc), we have specialized "shoes" in both the tops and bottoms of the blower casing - to help direct the air/fuel flow. On competition blowers, the bottom outlet tends to be a bit V-Shaped and is toward the front of the blower.
     
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  23. AccurateMike
    Joined: Sep 14, 2020
    Posts: 631

    AccurateMike
    Member

  24. Top-Alcohol and Top-Fuel blowers also have special fuel ports in the back of the blower case to pump fuel into the back of the case/rotors to cool everything down. Without the added fuel, things get way too hot back there - the Teflon strips get knocked out of them, the rotors and end-plate will gall, etc..

    If I have time, I will post some pictures of some of these "fuel features" for competition blowers that I've had to put into the blower casings and end-frames.
     
    Tim likes this.

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