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needs some carb help

710 Views 14 Replies 4 Participants Last post by  wildman72, 
W
I have a402 with and performer Intake holley 670 street avg on it. can any body please give me a starting ponit on the jet size I think they are 65 in it now. I know you alittle rich then drop it down 2 but where to start LOL:confused:
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D
I usually start with the stock jetting, which you are correct it is 65 in the primaries. You might have to go a bit richer, but you are correct again go by 2's. The secondaries have 68's in there. So if you go up 2 in the primaries, do the same in the secondaries when you get it close.

Dave
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D
Honestly the carb is a tad small. But if its spark knocking, try richening a few jets. Are you running vacuum advance?

Dave
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