Holley Carb Tuning?

PCA4208 · Aug 24, 2013

Does anybody here have much experience with tuning holley 2 barrel carbs? I just got a 4412 500CFM for my 360. I know i have to change the jets on it because of altitude, but anything else? I like at around 5-6000". Carb came with #74 jets, so i was thinking of dropping it to about 70 or 71. What about power valve? should i change that out? or just leave it.

Anything helps.

Thanks

crazzywolfie · Aug 25, 2013

the power valve that is in it should be fine. you could try changing it if you wanted but you need a vacuum gauge to tell you which one you would need.

PCA4208 · Aug 25, 2013

Yea.. I'm waiting on the Holley-Rochester carb adapter, so I can get anything done yet. I'm going to use a vacuum gauge anyways to adjust the idle mixture.

Hopefully this carb will work with 71 jets. I removed the original carb and it had like 64 jets in it!

Holley Carb Tuning?

PCA4208

Senior Member

crazzywolfie

Senior Member

PCA4208

Senior Member

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