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This may be part of why timing needs are different now days.
In the old days there was a good bit to be had by retarding timing in the upper rpm range, but I’ve read where guys are reporting better et’s by adding 1 or 2 degrees at upper rpm.
Joe Sherman did a 350 Chavy build and made coments that on 10.5-1 pump gas engines they had good results with 41 degrees in the upper rpm.
Where is a good Tech writer when you need one?
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