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Blower help

Discussion in 'The Hokey Ass Message Board' started by 41Stude, Apr 11, 2013.

  1. 41Stude
    Joined: May 16, 2012
    Posts: 23

    41Stude
    Member

    I have a SBC with a B&M Super Charger. It has a brand new quick fuel 750'double pump carb. The car won't idle below 1100 and when I put it in gear it stalls. It has a stall converter so that shouldn't be a problem. If anyone has blower motor experience and has some time to chat on the phone I would like to hear your ideas. I'm running out of them. I also need to know how to adjust the carb since there is no manifold vacuum. All help is appreciated. I'm learning. Send me an email or private message me and we can set something up. Thanks
     
  2. indyjps
    Joined: Feb 21, 2007
    Posts: 5,377

    indyjps
    Member

    Last edited: Apr 11, 2013
  3. Have you tried some gas in a squirt bottle, sprayed down the carb? If it picks up adding fuel, you have a vacuum leak or lean condition. Normally I use carb cleaner, but I'm not real big on running that shit through a blower.

    That's what it sounds like, just from the high idle situation.
     
  4. 41Stude
    Joined: May 16, 2012
    Posts: 23

    41Stude
    Member

    Carbs already been moded and sprayed around the outside of manifold, carb and blower looking for a vacuum leak. Idle never changed. I started the carb with a turn and a half on each adj screw like they recommend. Since I can't hook a vacuum gauge to a manifold source how do you tune the carb? I still think I have a vacuum leak but if the spray didn't find it what will?
     

  5. tylercrawford
    Joined: Jan 30, 2011
    Posts: 726

    tylercrawford
    Member
    from Buford, GA
    1. S.F.C.C.

    Are you using a boost referenced power valve?
     
  6. Russco
    Joined: Nov 27, 2005
    Posts: 4,327

    Russco
    Member
    from Central IL

    Blowers usually like a lot of initial timing how much timing are you running?
     
  7. Sounds to me like you need more fuel. Try richen up the idle mix, turn them out more. The reason you are idling high is so the throttle blades are open enough it is pulling more fuel through the primary circuit rather than the idle circuit.
     
  8. Standard gas&oil
    Joined: Dec 3, 2010
    Posts: 289

    Standard gas&oil
    Member
    from USA #1

    Check the back of the blower case for a missing vacuum plug. This same thing just happened to me. With a new Dyers 6-71.
     
  9. 41Stude
    Joined: May 16, 2012
    Posts: 23

    41Stude
    Member

    Did a pretty good search for vacuum leak. Need some education on the carb adjusting. Any good articles out there for blower motors?
     
  10. Open the idle screws 1/2 turn at a time. If the idle comes up, back the throttle stop off until you are back to original rpm. Repeat. If you can't get it "too rich" (idle speed levels out or begins to fall) by about 3-3 1/2 turns, you DO have a vacuum leak. Also, if the throttle stop comes loose (butterflies are shut), you likely have the same problem.

    Do this with the pedal linkage disconnected, to eliminate the possibility of a bind somewhere.
     
  11. harleyboy61
    Joined: Sep 23, 2010
    Posts: 38

    harleyboy61
    Member

    I had a similar issue on a set of edelbrocks on my blown sbc it turned out carb linkage wasnt exactly synced together one was slightly more open than other It was so close you almost couldnt see the difference . It caused one carb to be running off primary circuit and not idle circuit
     
  12. 41Stude
    Joined: May 16, 2012
    Posts: 23

    41Stude
    Member

    so the final story ends with a bad distributor. This thing created all kinds of problems but everything was solved with dropping in a new distributor. Thanks for the people who read this post and tried to help with their suggestions. I learned a lot from reading and trying different things they posted. Its a happy ending and I finally get to drive my Hot Rod. Even if its to the shagrin of the Pureist Studebaker guys.
     
  13. Russco
    Joined: Nov 27, 2005
    Posts: 4,327

    Russco
    Member
    from Central IL

    Glad you are getting it figured out. Would probably benefit from a custom advance curve like I mentioned previously they usually like a lot of initial timing (mine runs best at about 22* initial)
     
  14. rawcjw19
    Joined: Oct 8, 2012
    Posts: 581

    rawcjw19
    Member

    What did you end up using for a distributor?
     
  15. 41Stude
    Joined: May 16, 2012
    Posts: 23

    41Stude
    Member

    I dropped in a Summit HEI
     
  16. Oh the HORROR! Don't tell me you MODIFIED a sacred Studebaker!!!!
     

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  17. HotRodAV8
    Joined: Oct 7, 2002
    Posts: 88

    HotRodAV8
    Member
    from Seattle Wa

    90% of carb problems are electrical a wise man once told me
     

  18. Exwestracer is not talking about a vacuum leak, he is talking about a lean carb, dump fuel fdown the throat and see what the reaction is.

    As for tunning with a vacuum gauge it is not done with a blower motor, you trim your carbs by feel. It either takes a natural knack or years of experience, or both. This is part of the reason that dyno tunning has become so popular, there is still a huge learning curve but with a dyno you can tune by the numbers. Men and women that can tune one by ear are few and far between.
     
  19. Actually Benno, I was talking about a vacuum leak; but same result. Raw fuel or carb cleaner down the throat will let you know. Glad the OP got is sorted out.
     

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