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Old 05-22-2018, 09:02 PM   #4
Black_Sheep
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Join Date: Jun 2017
Location: upper midwest
Posts: 1,129
Re: carb tuning question

Some Holley carbs have reverse idle mixture screws, the “list” number off the choke air horn will identify what carb you have. Unless you are running a big cam, the carb jetting should be close right out of the box.

I like to set for peak vacuum then lean it out until it just begins to lose rpms.Reset the curb idle and tweak it again.
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