12-01-2011, 03:35 PM
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CC Member
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Join Date: Apr 2010
Location: Tampa,
FL
Cobra Make, Engine: Everett Morrison
Posts: 144
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Not Ranked
Holley 4778 Question
I just picked up a 700 CFM (List 4778).
I'm going to rebuild it and could use some advise.
Engine is a 428 with a max torque @ 4100 RPM and max horsepower @ 5300 RPM. With an efficiency of 90%, the 700 CFM seems right.
Jets - 66 primary, 71 secondary
Powervalve - 3.5 lb. (Manifold vacuum is 8lbs at idle)
The carb has a 31 primary and 32 secondary squirters (Should they be 35-40 with the power/weight ratio?)
What color accelerator pump cams should I start with?
__________________
Mike D
Tampa Fl
Last edited by Rawkkrawler; 12-01-2011 at 03:40 PM..
Reason: Added info
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