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Will the Holley 80555C 650CFM Q-Jet Replacement be adequate on a 355ci with AFR 180cc Cylinder Heads, 218/224 CompCam, Edelbrock Performer Intake, 1.6 Full Roller Rockers, Headers and Dual Exhaust. I am thinking of switching and would be going from the 750cfm Q-Jet to the 650cfm Holley. I'm not concerned with MPG.
 

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Automatic or Manual? Vacuum secondary carbs, other than the Q-Jet, respond better to automatic trans.

Dropping CFM, you may get a little better MPG, and you'll pick up low end response. Top end will suffer- it'll run out of air. 5500-6000 and it'll be done. Depending on the range of your cam/lifter combination.
 

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Discussion Starter #3
Automatic or Manual? Vacuum secondary carbs, other than the Q-Jet, respond better to automatic trans.

Dropping CFM, you may get a little better MPG, and you'll pick up low end response. Top end will suffer- it'll run out of air. 5500-6000 and it'll be done. Depending on the range of your cam/lifter combination.
Hi Tim,

Automatic Trans and I think with my Intake I'm limited to 5500 anyways right?
 
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