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View Full Version : Holley 750 Double Pumper Four Corner Idle Adjustment



Jetaholic
04-20-2007, 02:47 PM
Hey guys...for all you carburetor experts out there...
Is there a step-by-step method for adjusting the primary and secondary idle mixture screws on a "four corner" Holley 750DP?

Daytona100
04-20-2007, 05:26 PM
Hook up a vacuum gauge to intake manifold vacuum. Set timeing and let warm up. What you want to do is adjust the primary first. Turn the idle mixture screws in or out and watch the vacuum reading on the gauge. You want the highest vacuum reading on the gauge with the lowest idle speed. Adjust all four and reset the idle speed and your done.:D

lilrick
04-24-2007, 02:12 AM
COOL!! I always knew there was an easy, simple way to do it!!