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Thread: Holley 650 carb /engine questions

  1. #1
    infotraker
    Tested the new carb upgrade at Knights Landing outing, some probs still. Running 2 650 holleys, tunnel, BBC, new Proform carb bodies. Kept same jetting as before carb. upgrade of new bodies, 73s and 80s. jetting.
    1. Engine hesitates a little upon excel. (did not before upgrade). Maybe I need to put accel. pump quirters on from old body ?
    2. Upon slowdown from cruise speed to idle engine backfired thru carbs and quit , did this at times before upgrade.
    3. Upon hard exceleration some popping thru exhaust. Did not do that before body upgrade.
    Any ideas ?

  2. #2
    curtis26
    Oh man that sounds bad you better sell it to me! Haha Nice boat I didnt make it to the Knights landing get together this year but heard it was a blast. What do your plugs look like??

  3. #3
    curtis26
    Oh man that sounds bad you better sell it to me! Haha Nice boat I didnt make it to the Knights landing get together this year but heard it was a blast. What do your plugs look like??

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