16:1 on E85 is a bunch. How big is the cam? (just to get an idea of cylinder pressure)


Both 14.5:1 and 9.6-1 A/F seem really lean too.

I've heard that mixing higher octane race gas with E85 is ineffective in bringing up the octane rating because the chemicals used to bring up octane in gas don't work in ethanol?

The highest Ethanol motor I know of is Darren's Hemi motor, but it's 15.5:1 and on E100.