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We need more engine specifics to get you close. The old school rule says as much as she will take and then back the mechanical out so she does not exceed around 36 to 38 degrees total. I would guess mast hot cam, carb'd, pump gas engines will take 16 to 18 degrees initial at most.
Last edited by vettestr; 03-07-2009 at 04:26 PM..
Reason: spelling !!!
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