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Thread: carb prob ??

  1. #1
    Junior Member JOURNEYMAN
    Join Date
    Aug 2005
    Posts
    29

    carb prob ??

    i have a chevy 413 and has a 750 hp holley carb and the problem we are having is it will drop rpms after the temp gets to 180 degrees in gear only but runs perfect till we get up to 180 any advice on this thanks or if u need more info will let u know

  2. #2
    Senior Member RACING JUNKIE
    Join Date
    May 2006
    Posts
    2,044
    Could you be alittle more specific about your problem.
    What do you mean by 'drop rpms'?
    ***IN GOD WE TRUST***

  3. #3
    Junior Member JOURNEYMAN
    Join Date
    Aug 2005
    Posts
    29
    when in gear and u push throttle going up against converter and let off of throttle drops rpms down to around 400 only does it when temp gets to 180 other than at that temp it dont drop rpms thanks for any help u can give

  4. #4
    Senior Member RACING JUNKIE
    Join Date
    Dec 2008
    Location
    Sugar Hill, GA
    Posts
    1,365
    I believe you are tuned to the wrong temperature. I've had many an engine that runs great when cool but the real world starts at 160 and up.
    JMO Dave
    Dave
    http://www.racingjunk.com/profile/343797
    "All that is necessary for the triump of evil is for good men to do nothing" Edmund Burke

  5. #5
    Junior Member SHOW GUEST
    Join Date
    Mar 2006
    Location
    Butte, mt
    Posts
    3

    droppin idle speed

    don't know if you have a spacer under the carb to isolate from the heat..might help. I have seen the fuel in the carb heat up and expand and dribble from the boosters and drop fuel into the engine..essentially causing a flooding situation. Look into the carb when the idle is dropping. Watcha see?

  6. Racing Junk


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