General Category > Quadrajet Carb Talk and Tips

Idle air bypass delete on Jet stage 2 Quadrajet?

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Cliff Ruggles:
I don't factor in bypass air thru the PCV valve.  If I need more for any particular application I provide it thru the excellent system already in place in most Q-jets. 

I see folks drilling throttle plates for bypass air and don't understand why you would do that in lieu of using the bypass air system that's already in place.  It is a very precise vacuum leak and when used correctly can keep the carb well on the idle system, even with pretty big camshafts and low engine vacuum at idle........Cliff

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