Quote:
Originally Posted by SYZ
E85 fuel demands are increased over unleaded gasoline. What do you mean by "lean it out?"
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Relative to stoich, you can get away with a leaner mixture with e85 because the octane is higher. For relative sake the a/f for gas is 14.7 and the a/f for e85 is about 9.7. Everyone knows the car is on its face at 14.7 though, you can get closer to that stoich number with e85
Ex, if you run a s/c setup with gas and you know your target a/f you can run leaner with the e85 than with gas and make more power. But, you paint yourself into a corner because then you can never put gas back in the car unless you switch tunes.