Thread: Holley 4778 Question
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Old 12-01-2011, 03:35 PM
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Rawkkrawler Rawkkrawler is offline
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Location: Tampa, FL
Cobra Make, Engine: Everett Morrison
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Default 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?
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Last edited by Rawkkrawler; 12-01-2011 at 03:40 PM.. Reason: Added info
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