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Thread: New Holley Tri-Power Tuning

  1. #1

    Default New Holley Tri-Power Tuning

    Have a new Holley Tri-Power setup on 357 SBC, with 284 Comp Cam. To get it to idle about 900 RPM, it's off of the idle circuit. So wondering do I drill center carb butterflies, or adjust idle with all three carbs, as they all have idle circuits and idle mixture screws?

  2. #2
    Join Date
    Jan 2010
    Brisbane, Australia


    Yes, adjust the front & back carbs, open a fraction to allow the center carb to come back to where you want.
    The engine idles on all three, so all six barrels should be flowing some air, and idle fuel. Gary
    Regards, Gary

  3. #3


    OK thanks Gary. I'll give it a try when I've done my 20 day shift.

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