03-15-2015, 07:56 PM
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CC Member
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Join Date: Jul 2014
Location: Youngstown,
Oh
Cobra Make, Engine: Classic427 351w
Posts: 80
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Not Ranked
The only other possibility would be that the weights on the mechanical advance, are advancing it to 20 degrees when engine is running with timing light. I am doing this at 850 rpm. On a vacuum advance you plug off the vacuum line to test. But mine is mechanical.
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