markmurfie
Well-Known Member
In the flex fuel tune, there are flex fuel spark modifier tables that blend in extra spark as e% goes up.This would not happen on race gas. You would miss the benefit of the extra timing. The race gas would reduce knock and the knock sensors could potentially add spark, but no where near to the extent that you would want it to. Knock sensors are a safety measure first and a extra power finder second. Besides ethanol is much cheaper than race gas and the power differences are arguable if not slightly in ethanols favor.
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