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356911930 356911930 is offline
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Join Date: Apr 2011
Location: Santa Cruz, CA
Posts: 954
Where does the engine see max vac, RPM? If the vacuum is inverse to RPM and decreases as RPM increases that would make more sense.

Then at about 3,000 rpm the vacuum retard would be zero and mechanical advance would be 15* or 16*. Which sounds about right.

Old 06-30-2017, 08:26 AM
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