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Re: Idle vacuum - why only 10 inches?
normal is any where from 18 - 21 20 being usual best . 10 is way too low unless your running a monster cam . id have to say something carb related if you adjust stuff and seems to be no effect . normaly I set timing to the book then adjust the carb air flow then idle double check the air flow then adjust timing to best vac . you say powervalve so I'm assuming holley . they are a pain in the ... to set and get to stay there . id bet good money its carb
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