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Technical Period correct supercharging

Discussion in 'Traditional Hot Rods' started by NielsK, Sep 2, 2018.

  1. NielsK
    Joined: Jan 16, 2008
    Posts: 196

    NielsK
    Member
    from Denmark

    Hi guys. I have a nice sweet running Nash Standard Six. It'll end up in a T.R.O.G. style car. Light body, some kind of speedster body. As you probably know there are no speed parts for a Standard Six. But with 7 main bearings and fully pressurized oiling system it almost screams: "Supercharger" at me. Here goes: What options do I have? It has to be pre '48 to comply with the rules. And you UK guys please chime in. I know a lot of UK based "specials" where supercharged. If anybody has an idea where to souce a good example. . . That would be appreciated

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  2. What year did the GMC blowers start ?
     
  3. Rusty O'Toole
    Joined: Sep 17, 2006
    Posts: 8,452

    Rusty O'Toole
    Member

    You are on the right track, those old mildly tuned low compression engines respond well to supercharging especially the centrifugal type.
    McCulloch made blowers for Ford in the 1930s. There were centrifugal blowers on Graham, Auburn, Cord and Duesenberg cars in the 30s. Graham superchargers turn up from time to time. There was a long, long thread about a Ford tractor 4 banger with one in the TROG, I suppose you have seen it.

    The popular VS57 did not debut until 1953. But it has a vintage appearance and can be adapted to many engines.

    There were European made aftermarket superchargers like Centric, Judson, and others. Where you would find one I don't know. Most of them were made for engines under 2 liters.

    You might be able to take a turbocharger off an old diesel truck and modify the blower section into a belt driven supercharger.
     
  4. Rusty O'Toole
    Joined: Sep 17, 2006
    Posts: 8,452

    Rusty O'Toole
    Member

    Graham straight eight supercharger
    [​IMG]

    From the other side
    [​IMG]

    McCulloch for 30s Ford
    upload_2018-9-2_11-57-22.jpeg

    McCulloch VS57 on a Ford flathead
    [​IMG]

    You get the idea. It may be possible to find a vintage supercharger in Denmark, if not you should certainly be able to find an old turbo you can modify.
     
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  5. Relic Stew
    Joined: Apr 17, 2005
    Posts: 1,074

    Relic Stew
    Member
    from Wisconsin

    Some more pictures of vintage superchargers;
    Miller Meet 2012 046.jpg
    Alpha Romeo
    Miller meet 054.jpg
    Miller meet 057.jpg
    I think this is a Miller impeller,
    Miller meet 052.jpg
     
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  6. drtrcrV-8
    Joined: Jan 6, 2013
    Posts: 850

    drtrcrV-8
    Member

    Rusty : Judson was made in Conshohocken, PA( a suburb of Philadalphia )
     
  7. Rusty O'Toole
    Joined: Sep 17, 2006
    Posts: 8,452

    Rusty O'Toole
    Member

    Sorry for the confusion. I remember the Judson being advertised in sports car magazines in the fifties for MG, VW, Triumph etc and assumed it was imported.

    The Powerplus was a similar design made in England. I believe SCOTT superchargers were made in Italy. Is the OP going to find a suitable vintage supercharger in Denmark? You never know your luck.

    In any case I recommend the centrifugal type as being the simplest, lightest, and best suited to mild hop up of a road going engine. It doesn't do much at low RPM, where vintage engines are strongest, but helps a lot at medium to high speeds where they start gasping for air.
     
  8. NielsK
    Joined: Jan 16, 2008
    Posts: 196

    NielsK
    Member
    from Denmark

    I really like the idea of modifying an old turbo. . Problem will be complying to the pre 48 rule. I have a lead on 2 small Rootes type blowers. They' ve run on a 1.5 liter Riley. Thinking of running them in tandem. They need a lot of work though

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  9. Rusty O'Toole
    Joined: Sep 17, 2006
    Posts: 8,452

    Rusty O'Toole
    Member

    This is too obvious but if you hop up an old engine you must be sure the bearings, rings, pistons, oiling system etc are in top shape or your engine will have a short life, if a merry one.

    With a centrifugal supercharger you can get a horsepower increase of 30% to 40% and never hurt the engine. This supposes a blower pressure of 4 - 5 pounds. The American cars that had superchargers, considered this pressure perfectly consistent with the use of ordinary pump gas, and did not hurt driveability or engine life. But it certainly adds a lot of oomph where you need it most.
     
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  10. Rusty O'Toole
    Joined: Sep 17, 2006
    Posts: 8,452

    Rusty O'Toole
    Member

    Why pre 48? Are you planning on shipping the car to New Jersey for the TROG?
     
  11. NielsK
    Joined: Jan 16, 2008
    Posts: 196

    NielsK
    Member
    from Denmark

    Super nice pics by the way I would love a Graham or a Frenzel

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  12. Rusty O'Toole
    Joined: Sep 17, 2006
    Posts: 8,452

    Rusty O'Toole
    Member

    Last edited: Sep 2, 2018
  13. studebakerjoe
    Joined: Jul 7, 2015
    Posts: 287

    studebakerjoe
    Member

    Unkl Ian the GMC blowers were out in 1938 on the 71 series engines.
     
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  14. NielsK
    Joined: Jan 16, 2008
    Posts: 196

    NielsK
    Member
    from Denmark

    Thanks. That was what I expected. I found a Kaiser Frazer on E . . . But somehow I can't image it in my engine bay, it's hideous Not that pricey though. I'll try and wrestle the 2 Roots type blowers from a old geezer I've met recently. They need a lot of work. But they would look killer in tandem hanging on the side of that old green six cylinder

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  15. NielsK
    Joined: Jan 16, 2008
    Posts: 196

    NielsK
    Member
    from Denmark

    Wow I didn't know that. I've always thought they popped up in the early fifties

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  16. Deuces
    Joined: Nov 3, 2009
    Posts: 14,918

    Deuces
    Member
    from Michigan

    I'll take a 6-71 with a Hilborn 4 port injector.....
     
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  17. gimpyshotrods
    Joined: May 20, 2009
    Posts: 14,883

    gimpyshotrods
    Member

  18. gimpyshotrods
    Joined: May 20, 2009
    Posts: 14,883

    gimpyshotrods
    Member

    Looking for a throttle body now.
     
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  19. rusty rocket
    Joined: Oct 30, 2011
    Posts: 2,806

    rusty rocket
    Member

    I dont know much about superchargers except you probably need to run a chain drive:)
     
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  20. NielsK
    Joined: Jan 16, 2008
    Posts: 196

    NielsK
    Member
    from Denmark

    Thought of that. It would scare my pants of everytime I rev it up and that chain starts to "sing". Naaah I would be stupid enough to try it

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  21. Rusty O'Toole
    Joined: Sep 17, 2006
    Posts: 8,452

    Rusty O'Toole
    Member

    Leave the Riley superchargers to the Riley fans. You can do better. For your purpose a centrifugal blower is better than a roots.
     
  22. topher5150
    Joined: Feb 10, 2017
    Posts: 1,004

    topher5150
    Member

  23. topher5150
    Joined: Feb 10, 2017
    Posts: 1,004

    topher5150
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    also any other cool crank driven supercharger
     
  24. banjorear
    Joined: Jul 30, 2004
    Posts: 3,649

    banjorear
    ALLIANCE MEMBER

    Yep. When I was kid and was fooling with VW's, the Judson was the set-up. Everything fit under the hood. It allowed those 1200 CC's to actually climb a steep hill in 2nd gear. LOL!
     
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  25. Inline
    Joined: May 13, 2005
    Posts: 239

    Inline
    Member
    from Ohio

    I put a Graham Supercharger on my roadster about 15yrs ago. It producrs just over the amount of power it takes to run it. They are certainly neat pieces...

    It's on a '37 Dodge 218 w/ a 5 speed.

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  26. sunbeam
    Joined: Oct 22, 2010
    Posts: 3,366

    sunbeam
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  27. Speed Gems
    Joined: Jul 17, 2012
    Posts: 2,091

    Speed Gems
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  28. nutrocker
    Joined: Jan 12, 2007
    Posts: 295

    nutrocker
    Member

    I believe the Wade company started making blowers in ‘47 although the RO34 didn’t get fitted to the Commer TS3 till ‘53. A bit of research might find the RO34 and it’s little brother the RO20 used a lot earlier.
    Interestingly, the roots type blower like the RO34 make really good low down efficiency. As high as 90% efficient low down but dropping to 70% around the mid range revs and boost and then a massive drop to 50% at the higher revs.
    The setup I have produces a full 10 lbs of boost (according to my boost gauge) when driven at 1:1 engine speed and gives boost really low down.
    The angled intake/output flanges is due to having straight rotors. The idea is to even out the pulses that the straight rotors produce.
     
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