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Thread: BEST POSITION FOR CARB?

  1. #1
    Senior Member DYNO OPERATOR
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    BEST POSITION FOR CARB?

    SHOULD THE CARB BE LEVEL WHEN SITTING ON THE ENGINE OR TILTED WITH THE MOTOR,IM USING SOLID MOUNTS IN A STOCK FRAME.

  2. #2
    Senior Member RACING JUNKIE
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    That's a very good question. We messed with different settings. One tilted forward, one level, and believe it or not, it didn't make much if any difference. I like to have mine level when engine is in your car, mainly just for setting bowl levels. Alot of engines are tilted back to align the driveshaft to the rearend. On that application I would probably use the tilted intake, other than that I would run the intake that is level....

  3. #3
    Senior Member RACING JUNKIE
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    Level seem to be better from what I've seen, many take the tappered intakes and put a wedge spacer on them to fix the issues they have.
    David Lanning
    IHRA NHRA 387B

    Fleenor Racing Transmission
    419-280-1406
    Lanning Electric
    Complete Drag Car Wiring
    APD Race Engines
    www.apdracing.com

  4. #4
    Senior Member DYNO OPERATOR
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    Quote Originally Posted by hammertime
    Level seem to be better from what I've seen, many take the tappered intakes and put a wedge spacer on them to fix the issues they have.
    WHAT KIND OF ISSUES,MAYBE A LEAN CONDITION THAT CAUSES A STUTTER AT LAUNCH??

  5. #5
    Senior Member RACING JUNKIE
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    10 years ago I turned a dragster over on it top. It slid upside down and facing the wrong way from the finish line until it came to a rest. I was lucky that the front wheels were touching the ground, allowing me to keep the dragster in the middle of the track until it came to a rest. It took out a slick, knocked the scoop off and scratched a header. The reason I told this story is when I got to the other end the engine was still running. In my state of daze I even racked the engine back before I killed it like I would any other time. The carb works on vacuum more so than gravity. A stutter is probably a lean problem, IMO alittle tilt of the carb wouldn't cause it, unless you have a bowl set to high.....

  6. #6
    Senior Member DYNO OPERATOR
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    I would rather have mine positioned on top of the engine, haha. J/K

  7. #7
    Senior Member RACING JUNKIE
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    Never had a stumble, I've heard (and seen) with the carb tappered it runs some holes leaner then others.
    David Lanning
    IHRA NHRA 387B

    Fleenor Racing Transmission
    419-280-1406
    Lanning Electric
    Complete Drag Car Wiring
    APD Race Engines
    www.apdracing.com

  8. #8
    Senior Member RACING JUNKIE
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    Crankshaft hould be at the same angle that you can match with your pinion angle...
    -WJ Birmingham

    OneBadGMC.com

  9. #9
    Senior Member RACING JUNKIE TheRabbit's Avatar
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    Quote Originally Posted by OneBadGMC
    Crankshaft hould be at the same angle that you can match with your pinion angle...
    well yes and no. No doubt the straighter and flater the crank, driveshaft and pinion is the better, but some things are just to tall for that to work.
    Some of the wedge spacers are suppose to have the carb level under hard acceleration. In theory it's to keep the fuel flow even to all the cylinders.
    And yes a stumble comes from the carb being to lean.

  10. #10
    Senior Member RACING JUNKIE
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    Quote Originally Posted by dparker
    10 years ago I turned a dragster over on it top. It slid upside down and facing the wrong way from the finish line until it came to a rest. I was lucky that the front wheels were touching the ground, allowing me to keep the dragster in the middle of the track until it came to a rest. It took out a slick, knocked the scoop off and scratched a header. The reason I told this story is when I got to the other end the engine was still running. In my state of daze I even racked the engine back before I killed it like I would any other time. The carb works on vacuum more so than gravity. A stutter is probably a lean problem, IMO alittle tilt of the carb wouldn't cause it, unless you have a bowl set to high.....
    Did you win that round or no?


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