Not Ranked
Rick,
I have moved the gaps around a bit on high and street stock compression ratio engines without much change. This was not done on a dyno so could not define gain or loss beyond plug readings and listening to engine. In the end I stuck with MSD recommendations figuring they did tests to prove reliability if nothing else.
On a 12.4 CR engine I did test wider gaps trying to get longest fire signal to point I expected to pick up a misfire. I could hear or feel no gain so went back to their recommendations thinking about reliability of unit at higher voltages. Nothing beyond a hunch without way to measure true results.
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