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Technical The Supercharger Thread To End All Supercharger Threads

Discussion in 'The Hokey Ass Message Board' started by Speed Gems, Sep 30, 2019.

  1. loudbang
    Joined: Jul 23, 2013
    Posts: 31,500

    loudbang
    Member

  2. I noticed in reading the last 2 pages that maybe some info might be helpful for some of the readers. This page will tell you about the absolute beginning of Roots blowers: https://en.wikipedia.org/wiki/Roots_Blower_Company
    The original version was a 2 lobe rotor. It's design was to move volume and not achieve high amounts of pressure. I have never researched to see who developed the 3 lobe rotor such as the GMC design. The concept of "supercharger" reflects on pushing more than the vacuum pulled air charge into the engine. Hence, supercharge. The terms: blower, huffer, wind pump all reflect to the same principle of compressing the atmosphere to get more air flow into the engine. The guys in the pits call them blowers. Rules makers call them superchargers. Makes no difference if it's a roots, a centrifugal or a turbocharger. They all do the same end result. One other point, all roots design units are also referred to as positive displacement units. They are measured by swept volume of rotation in size. The 4/71 was designed to feed 4 cylinders of 71 cubic inches each. I know that most of you are aware of these facts. This was just meant to help those who are new to this. :)
     
  3. cheezwiz
    Joined: Oct 11, 2008
    Posts: 159

    cheezwiz
    Member

    Studebaker guru Malcolm Berry just got his supercharged Stude flathead 6 running ! It sounds like an airplane !!
     

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  4. seb fontana
    Joined: Sep 1, 2005
    Posts: 6,710

    seb fontana
    Member
    from ct

    Here is one I picked up years ago; any one know the application? IMG_0592.JPG
    Number on tag is 2502 13821. Three lobe, about 3.5 long by 3.5 diameter
     

    Attached Files:

  5. Seb, non automotive is my guess. You may know this but Bob McCulloch was the inventor of the McCulloch supercharger. His middle name was Paxton and one of his spinoff companies was called Paxton that was later bought by Studebaker. He's responsible for the Mac chainsaw engines used in go kart racing. He started Pueblo West Colorado. He was instrumental in the development of Lake Havasu Az. in which he was responsible for purchasing London bridge and moving it there. He died in 1977 after leaving a tremendous legacy in the high performance world.
     
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  6. seb fontana
    Joined: Sep 1, 2005
    Posts: 6,710

    seb fontana
    Member
    from ct

    wfo, yes not automotive but still sucked air thru a carb [gasoline I think] and blew to a single cylinder 4cycle air cooled flathead engine and something else.;) Can't think of what to call the assembly right now, looked military..:confused: Just read about McColloch last night, interesting man. There is a couple of the mac kart engine blocks on e bay.
     
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  7. loudbang
    Joined: Jul 23, 2013
    Posts: 31,500

    loudbang
    Member

  8. Deuces
    Joined: Nov 3, 2009
    Posts: 19,240

    Deuces
    Member
    from Michigan

    I love them side draft carbs!!!.... :)
     
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  9. DDDenny
    Joined: Feb 6, 2015
    Posts: 14,065

    DDDenny
    Member
    from oregon

    Last edited: Nov 21, 2020
    Deuces and exterminator like this.
  10. Mike VV
    Joined: Sep 28, 2010
    Posts: 2,129

    Mike VV
    Member
    from SoCal

    My Uncles (RIP) car, "Dodie 77" .

    upload_2020-11-21_7-40-2.png

    upload_2020-11-21_7-47-51.png

    Mike
     
    Last edited: Dec 2, 2020
  11. GearheadsQCE
    Joined: Mar 23, 2011
    Posts: 2,622

    GearheadsQCE
    Member

    DDD,
    Fins are going the wrong way:p
     
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  12. DDDenny
    Joined: Feb 6, 2015
    Posts: 14,065

    DDDenny
    Member
    from oregon

    Correctamundo!
     
  13. seb fontana
    Joined: Sep 1, 2005
    Posts: 6,710

    seb fontana
    Member
    from ct

    How can volumne cubic inches be found? As simple as blocking off one side and filling with lite oil but I keep thinking it has to be rotated too?
     
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  14. winduptoy
    Joined: Feb 19, 2013
    Posts: 2,197

    winduptoy
    ALLIANCE MEMBER

    XXL__, 31hotrodguy, j hansen and 7 others like this.
  15. DDDenny
    Joined: Feb 6, 2015
    Posts: 14,065

    DDDenny
    Member
    from oregon

  16. loudbang
    Joined: Jul 23, 2013
    Posts: 31,500

    loudbang
    Member

  17. loudbang
    Joined: Jul 23, 2013
    Posts: 31,500

    loudbang
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  18. loudbang
    Joined: Jul 23, 2013
    Posts: 31,500

    loudbang
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  19. j hansen
    Joined: Dec 22, 2012
    Posts: 1,798

    j hansen
    Member

    Skärmavbild 2020-12-03 kl. 05.16.17.png
    Bengtsfors 2016
     
  20. loudbang
    Joined: Jul 23, 2013
    Posts: 31,500

    loudbang
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  21. loudbang
    Joined: Jul 23, 2013
    Posts: 31,500

    loudbang
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  22. loudbang
    Joined: Jul 23, 2013
    Posts: 31,500

    loudbang
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  23. Only other one I have seen for a Caddy. Have had mine since 75.
     
  24. wrenchbender
    Joined: Sep 5, 2007
    Posts: 1,998

    wrenchbender
    Member

    Let’s see some pics


    Chrome don’t get ya home
     
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  25. GOT SOME, WILL TRY TO POST SOME.
     
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  26. Speed Gems
    Joined: Jul 17, 2012
    Posts: 2,797

    Speed Gems
    Member

    Poly block with a Potvin setup. Image stolen from @Deuces in the Potvin hemi builders thread.
    blown poly engine in a rail.jpg
     
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  27. 61SuperMonza
    Joined: Nov 16, 2020
    Posts: 199

    61SuperMonza
    Member

  28. loudbang
    Joined: Jul 23, 2013
    Posts: 31,500

    loudbang
    Member

    Can you figure out if the mixture goes in the side of the case or up and into that "box" above them?
     
  29. s.e.charles
    Joined: Apr 25, 2018
    Posts: 34

    s.e.charles

    [​IMG]

    where would i begin research on something like this? Bangers? thanks
     
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  30. Seb, your question about measurement: math would be how I would go about it. To use liquid, it would be best to pull and end cover. Grease the rotor lips to seal to the case as best you can an fill with a buret just like checking a cylinder head for volume with the rotor turned to the best position to seal. You will find many places to leak in doing this. :)
     
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