Box Stock

Idle air screw needle settings

M

mattf76

Member
Looking for some basic guidelines for Idle air screw needle settings for box stock clone. I realize fuel circuitry etc may have an effect on this but looking for basic settings. Id like a basic setting, how many turns out for an unrestricted carb with big pipe. Also a restricted engine small pipe and big pipe. If anyone can help I'd appreciate it.
Thanks,
Matt
 
Turn the throttle screw in 1 to 1.5 rounds to increase the rpm's. Screw the idle jet screw all the way in, don't over tighten it. Crank the motor and adjust the throttle screw in or out until it hits 2400 rpm's. Screw out the idle air screw until it smooths out. Mine is always about 2200 or so.
 
Just about all my engines end up around 3 turns out from fully seated, no matter the jetting or build
 
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