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Technical Little help with SBC blower

Discussion in 'The Hokey Ass Message Board' started by Barn Hunter, Nov 4, 2019.

  1. 56sedandelivery
    Joined: Nov 21, 2006
    Posts: 6,360

    56sedandelivery
    ALLIANCE MEMBER

    Judging by the "angle", and length of the steering column, I'm guessing it's in a C-1 Corvette? What are the plans?
    I am Butch/56sedandelivery.
     
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  2. badvolvo
    Joined: Jul 25, 2011
    Posts: 469

    badvolvo
    Member

    I think you may be correct, I can see a little of the firewall as well, looks like my 59.
     
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  3. I'm guessing the M\T valve covers are Chinese knockoffs from the '70s.
    The circles are for oil fill or breather/pcv holes, which dates them to '68 or newer, and the backward slash sidestepped copyright infringement laws.:rolleyes:

    Some more "interesting" theories:
    https://www.jalopyjournal.com/forum/threads/backwards-slash-on-m-t-valve-covers.440523/
    https://www.camaros.net/forums/18-engine/183325-backwards-slash-mickey-thompson-valve-covers.html
     
  4. Would be a great blower for a Ford flathead V8.
    But of course great on the engine it sitting on right now.
     
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  5. My guess is 57 or older
     
  6. alchemy
    Joined: Sep 27, 2002
    Posts: 15,864

    alchemy
    Member

    No trim strip on top of the fender, so a single headlight.
     
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  7. 56sedandelivery
    Joined: Nov 21, 2006
    Posts: 6,360

    56sedandelivery
    ALLIANCE MEMBER

    292 Turbo heads; the original "race heads" from Chevrolet. Had a pair on my RED of the late 80's/early 90's. Angled plugs, big valves and springs, screw-in studs and guide plates. I am Butch/56sedandelivery.
     
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  8. Barn Hunter
    Joined: Feb 15, 2012
    Posts: 1,372

    Barn Hunter
    Member

    You're right. Gotta finish the paperwork before I can tell more.
     
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  9. Barn Hunter
    Joined: Feb 15, 2012
    Posts: 1,372

    Barn Hunter
    Member

    We've got some sharp people on here!
     
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  10. Barn Hunter
    Joined: Feb 15, 2012
    Posts: 1,372

    Barn Hunter
    Member

    Another Sherlock Holmes....it's a '56. Can't really say any more til I get the paperwork finished.
     
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  11. Atwater Mike
    Joined: May 31, 2002
    Posts: 10,263

    Atwater Mike
    ALLIANCE MEMBER

    'Good Hunting'...on that paperwork. Great collection of parts there, just smashing that they're on an early 'Vette!
    Please resume the thread when you get the 'docs' docked!
     
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  12. 427 sleeper
    Joined: Mar 8, 2017
    Posts: 1,051

    427 sleeper
    ALLIANCE MEMBER

    Man! That thing is just plain F-in Kool!
     
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  13. Paper work?
    So you don’t own it yet?


    Sent from my iPad using H.A.M.B.
     
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  14. chevy57dude
    Joined: Dec 10, 2007
    Posts: 5,774

    chevy57dude
    Member

    Sorry I called it a double pumper, didn't notice the vac pod, amazed to see a vacuum secondary carb on top of a blower!
     
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  15. Barn Hunter
    Joined: Feb 15, 2012
    Posts: 1,372

    Barn Hunter
    Member

    Oh, yeah. I will!
     
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  16. Barn Hunter
    Joined: Feb 15, 2012
    Posts: 1,372

    Barn Hunter
    Member

    I do own it. Need to run the vin verification.
     
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  17. 1twisted1
    Joined: Nov 26, 2011
    Posts: 138

    1twisted1
    Member
    from michigan

    Do the blower belts have any number left on them, have the same set-up but with a 471 and need to find the correct belts. 20190804_160929.jpg
     
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  18. jnaki
    Joined: Jan 1, 2015
    Posts: 4,883

    jnaki

    upload_2019-11-6_3-59-29.png
    A/Modified Roadster class using a 371 WITH A SINGLE CARB…
    JESS VAN DE VENTER SAN DIEGO

    Hello,

    That set up was/is a very old system. It would be interesting to know the facts in your motor build and what class it actually ran back in those days. NOTE: Most of the “Big Boys” ran with 671 blowers on an SBC for those gas coupes and sedan classes, then, most went to hemi motors.

    But, these smaller blowers were good for additional boosts in various other classes. Jess Vandeventer was running what looks like a 3-71 blower. Jess set many national records and won many a national event with this car.


    Jnaki

    Your photos show that it has been sitting for quite some time. What car was this motor installed and what class of racing? Drag racing history is always interesting…

    Jess Van Deventer before the 371


    a HAMB conversation with Randy Chenowith from San Diego:

    Hello,
    The unknown white roadster has been identified as belonging to Jess Van Deventer from San Diego. Here is the message I received from the San Diego Racing Museum Website: http://sandiegoracingmuseum.weebly.com/

    "My name is Charles Randolph Chenowth , I go by Randy Chenowth. On the HAMB I am BIGDADDYUSMC ...

    The white Roadster in your movie is Jess Van Deventer or his brother,,,, they both drove the car in the very late 1950's & early 1960's

    The number on the car never changed ... it is #502 ( California penal code for drunk driving )

    My father built that car in his garage in Imperial Beach, California in the late 1950's..It was originally built for a Bean Bandit... The T roadster was traded to Van Deventer for a street legal 32 roadster..."

    Thanks Randy... Great information on all things racing in San Diego History...
    Jnaki
    JNAKI, SEP 23, 2016
     
  19. What made me think of it is that under boost there should be zero vacuum under the blower but the vac above the blower should be considerably higher than in a naturally aspirated motor. You play with 'em more than I do so you would know better than I do.

    My last blower motor was pretty much a hybrid and in no way HAMB friendly.
     
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  20. Honest question, I haven’t played with a roots style blower. Would there be more vacuum above the blower than a naturally aspirated application? Does the blower pull through the carb a significant amount?


    Sent from my iPhone using H.A.M.B.
     
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  21. squirrel
    Joined: Sep 23, 2004
    Posts: 46,862

    squirrel
    Member

    The vacuum between the carb and blower depends mostly on how far the throttle blades are open (just like if there were no blower there at all).

    The blower mostly makes the engine act "bigger". So, if you get, say, 1" vacuum at wide open throttle on a 327 with a 600 cfm carb, you'll still get about 1" vacuum at WOT on a blown 327 with a 1000 cfm carb, won't you?
     
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  22. That was my thought, I just had nothing to base it on. I understand what the blower is doing as far as increasing the amount of air filling the cylinder, just was curious about the vacuum. Thanks Jim


    Sent from my iPhone using H.A.M.B.
     
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  23. Barn Hunter
    Joined: Feb 15, 2012
    Posts: 1,372

    Barn Hunter
    Member

    The 2 outside belts are 445S, the middle is a 206K .....Gates.
    20191106_104441 (2).jpg
     
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  24. squirrel
    Joined: Sep 23, 2004
    Posts: 46,862

    squirrel
    Member

    The belt number is 7580. That is a 58 inch long, 7/16 wide belt. You want them all from the same batch, though.

    Sent from my Trimline
     
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  25. Barn Hunter
    Joined: Feb 15, 2012
    Posts: 1,372

    Barn Hunter
    Member

    I'm still learning....
     
  26. alchemy
    Joined: Sep 27, 2002
    Posts: 15,864

    alchemy
    Member

    Ustabe you could buy factory-matched pairs of belts. Can a guy buy a factory-matched triple of belts?
     
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  27. squirrel
    Joined: Sep 23, 2004
    Posts: 46,862

    squirrel
    Member

    ask your local parts store?
     
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  28. Deuces
    Joined: Nov 3, 2009
    Posts: 18,708

    Deuces
    Member
    from Michigan

    Hey Butch... You remember the porting templates in Car Craft magazine for the angle plug turbo heads?????..... I think it came out in '77.... I still have that copy in a box somewhere.... :confused:
     
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  29. They used to sell matched length belts,,,,usually special order .

    Tommy
     
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  30. saltflats
    Joined: Aug 14, 2007
    Posts: 10,313

    saltflats
    Member
    from Missouri

    The matched belts were easy to get back when those big Mopar's were roaming the roads.
     
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