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Technical How can i supercharge my flathead on a budget?

Discussion in 'Traditional Hot Rods' started by mastergun1980, Apr 2, 2011.

  1. choppedtudor
    Joined: Nov 28, 2009
    Posts: 719


    my budget is in worse shape than obama'

    Attached Files:

    Travis gottschalck likes this.
  2. kkustomz
    Joined: Jul 4, 2007
    Posts: 342

    from Texas

    Yes procharger
  3. lippy
    Joined: Sep 27, 2006
    Posts: 6,817

    from Ks

    Heres a pretty cheap setup. Was good for 10 sec et's in my buddies car.

    Last edited by a moderator: Apr 22, 2011
    Mikus Maximus likes this.
  4. 38FLATTIE
    Joined: Oct 26, 2008
    Posts: 4,349

    from Colorado

    Lippy, exactly what part of that setup is cheap?:D
  5. Jagman
    Joined: Mar 25, 2010
    Posts: 345


  6. lippy
    Joined: Sep 27, 2006
    Posts: 6,817

    from Ks

    Shit, I was still trying to load the picture!! I think it was a B&M blower. He didn't have that much in it, really. I'd ask him but he passed away a couple months ago. :(
  7. Crusty Nut
    Joined: Aug 3, 2005
    Posts: 1,834

    Crusty Nut

    drylakespeedshop likes this.
  8. love it, you're the man

    SC rules
  9. 40FordGuy
    Joined: Mar 24, 2008
    Posts: 2,907


    My fully rebuilt 8BA priced out at just over $3500, UNblown.

  10. 55chevr
    Joined: Jul 12, 2008
    Posts: 985


    Blown engine for under 2K? Not possible without stealing the parts. Crusty, you did it for under 2K but you had a milling machine and a tig welder. Plus an aluminum manifold and carbureators. Last time I looked a decent 4-71 was close to a grand and the drive system would cost damn near as much.
  11. Crusty Nut
    Joined: Aug 3, 2005
    Posts: 1,834

    Crusty Nut

    See, thats where you'd be wrong. I bought that manifold here on the HAMB for $30, "milled" it with my die grinder, cut offwheel, and elbowgrease. I did pay a local TIG welder to weld it up for me. I also bought carbs on the HaMB. The 4-71 came from ebay. I rebuilt it with the help of a book. I cobbled together a drive system that worked (all detailed in some thread of mine) and had way less than 2K in the induction system.

    It is totally doable, just depends how bad you want to do it.
  12. nrgwizard
    Joined: Aug 18, 2006
    Posts: 2,083

    from Minn. uSA

    Try these:

    Most on the is site won't even consider this. But it's worth looking at. To answer your Q: yes you can supercharge your flattie -very cheaply. & 5-6psi is just about a 50% power increase. (well, probably closer to 40%, but still... for ~ $300 USD, or probably, less... ). But you (or others' opinions you seek) may not like the looks. Doesn't mean you couldn't add fins, or different looks to it... I don't suppose building your own supercharger is "traditional", although I can think of a few folks who did...

    These things were designed for 1 to (maybe) 3 liters. You do the math...
    There is a load of development work listed/covered in the carbblowers site.
    Dick was looking for low rpm boost, using no more than the mills' original redline. Rpm will make a difference, as in all centrifugal superchargers, so the diameter of the shaft dictates the rpm by the bearings available & the speed they can operate at.

    Dick was looking for a target of ~ 6psi, just a hair more than the Paxton really put out - esp in the manifold. And he wanted a device that anyone could not only build themselves, but fix, too. Looks were/are secondary for him. The solutions he found aren't the usual, but they work. & if one isn't enough, more can be added easily.

    If you can find a turbo off of a v12, or v16 ... killer. I'd mount it like a Frenzel (sp?), or maybe like a sidemount - either a Duesy or Graham-Paige (I think), or even an endmount, like a Miller. Last choice would be Paxton/McCullough, well, just because.

    You could go blowthru, or drawthru.


  13. mastergun1980
    Joined: Oct 18, 2010
    Posts: 1,094

    from Alva OK

    After reading all the replys I decided to do some careful shopping .. What I turned up was a roadrunner manifold with a very nice weiand 142 - guy was asking 1500.00 after I pointed out the cost of crank hub & pulley - and water pump pulleyshe droped the price to 800.00 - I am gonna have another $800.00 in all the pulleys, So thats about 1600.00 for the blower setup - I have around $700.00 in the 3 holleys and the 3x2 adapter - so not counting the small odds n ends thats gonna be $2300.00 - And thats on budget for me! I am rebuilding an 8cm and that won't b cheap but oh well - Oh and Joe Abblin was a huge help through all of this. Here is a pic of what I have so far. . . .
    I polished the carbs and the 3x2 - The blower is next but I thing I'm gonna get a better buffer first! Probablly a decent 8" pedistal mount. Even a 6" would be handier than the bench grinder I have been using!
    tomkelly88 and mad mikey like this.
  14. Da' Bomb
    Joined: Apr 8, 2005
    Posts: 438

    Da' Bomb

    What about a Graham supercharger?
  15. Simplicity
    Joined: Jul 12, 2009
    Posts: 16

    from Toronto

    It's been 7 years. how far have you got?
  16. Just strap a couple leaf blowers in and route the plumbing to the carbs.
    jimmy six likes this.
  17. hammerd 31
    Joined: Sep 19, 2016
    Posts: 51

    hammerd 31

    What year was the first leaf blower releasted? This must be traditional right, no plastic shit.
  18. hotrodlane
    Joined: Oct 18, 2009
    Posts: 335


    I know this is an old thread but depending on your resources super charging your flathead is totally doable for $2K. In todays world of lazy amazon shoppers who don't even go outside, Some people tend to forget that you can dig a swimming pool with a shovel. Just is not as easy as with a track hoe. However both tools still do the same thing.
    firstinsteele likes this.
  19. $2,000 is about correct. Buy a used 4-71 that still spins ($300-400) / buy a used 2-2bbl manifold
    ($200) Also available new from Speedway @ $219. Have a 5/8th Aluminum plate water cut to
    match a 4-71 base gasket and mount it to 2x2 manifold. Buy a long 8" drive snout used off E-bay or
    new from Speedmaster 79. ($225) Buy 2 used pulleys E-bay ($125) Mount one pulley to snout
    with flange to rear... and pulley opening to front. Buy a used Ford alternator ($25) and have a 3-inch
    1/2-inch cog pulley made by machine shop and run alternator as your idler. Most everyone will tell
    you that you can't use alternator as idler. THEY LIE ! ( I've been there/ DO that.) Run a ProComp
    2bolt flathead (cam drive) distributor (new...$75 on E-bay) Run a used MSD 6A box or go the budget
    route with an externally mounted HEI module. Go with the wide 3-inch belt. Not so much for need it
    ....but for looks and whine. If you're going to run with the big dogs...WHINE like one.
    I run blower at 8% overdrive and boost gauge quickly goes to 10lbs and the tires light up. Do not make full blasts at that boost or you will have problems. I sunk a few cast piston domes until I went Arias pistons.
    My car is fast /noisy / and a daily driver.
    Good luck with your project
    Cliff Ramsdell likes this.
  20. Bandit Billy
    Joined: Sep 16, 2014
    Posts: 10,950

    Bandit Billy

    $2000??? Don't tell my wife that crap. I paid almost that for the main caps and bolts holding mine together.
  21. Rusty O'Toole
    Joined: Sep 17, 2006
    Posts: 9,620

    Rusty O'Toole

    I know it's an old thread but I vote for the McCulloch VS57 centrifugal blower. It was designed for the flathead Ford and the prototypes were tested on 52 Fords. You can buy used ones for $300 - $400 (I have bought them for less). You might get lucky and find a complete Ford setup with mounts, idler pulley, crank pulley and all. You might have to pay $600 or $700 for a complete outfit.

    They were designed to work with a stock Ford engine and not hurt it at all, while giving 40% more rear wheel Hp.
    Last edited: Dec 13, 2018
    Bandit Billy likes this.
  22. Drylake
    Joined: Jul 17, 2016
    Posts: 704


    I am doing this at the moment, supercharged flathead on a budget... I bought 2 superchargers for $400 and sold the second one for $600. Cut some alloy plate from the local salvage yard ($30) to mount the supercharger to the manifold and for a carb plate. The manifold came with other parts that were on sold, and it owes me nothing. I've done this my entire build, buying in bulk... sell what I don't need and it pays for everything. My roadster cost $1,000, everything hotrod related in my shed owes me nothing. If you really want something on a budget, there are ways around it. I wanted a hot rod, but with a mortgage and 2 kids I could never afford to pay someone to do it for me, let alone pay for it without on selling parts. It can be done with some imagination and desire. 20181126_190513-1.jpg 20180509_171020.jpg
  23. choppedtudor
    Joined: Nov 28, 2009
    Posts: 719


    a little inspiration for you, here's my mess...making 6 lbs boost. 000_0008[1].jpg
  24. CheatersPete
    Joined: Sep 25, 2002
    Posts: 1,289


    I built this set up more than 2 years ago, boat 4/71 blower for 200, intake for 400, snout and tensioner were used parts found on ebay for 400, carbs were used ones that i rebuild for cheap... built my own pulleys for 150... did make 6 psi and 232hp....

    Attached Files:

  25. Jalopy Joker
    Joined: Sep 3, 2006
    Posts: 30,698

    Jalopy Joker

    20181231_134915.jpg any others find a way under $2K?
  26. I made this 2x2 carb adaptor for this Eaton M90 supercharger P1150558 (3).JPG P1150376 (2).JPG
    HuskerNation and Runnin shine like this.
  27. Warpspeed
    Joined: Nov 4, 2008
    Posts: 532


    Agree, Eaton M90 is a reasonably modern blower, (not totally worn out and stuffed) about the right size, and more or less readily available. Only real objection to it (for a hot rod) is the rather unfortunate rear entry.

    Several ways around that, maybe contact Elco above, or fabricate something similar yourself, or fit carbs onto the top of the blower casing direct.

    Just because the original inlet is located at the back for hood clearance, does not mean you have to use it that way on your hot rod.

    Like any roots blower, a downdraft carb entry can be fitted onto the top of the casing by simply cutting a hole in the top, and fabricating a suitable carb mounting.
  28. dumprat
    Joined: Dec 27, 2006
    Posts: 3,345

    from b.c.

    A 6v53 gmc supercharger is an easy fit to a flatty with a simple flat plate manifold and short drive.
    Mikus Maximus likes this.
  29. DDDenny
    Joined: Feb 6, 2015
    Posts: 17,878

    from oregon

  30. racerlall
    Joined: Mar 18, 2011
    Posts: 98

    from WA

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