I've dyno the same motor on both 110 octane race gas and local pump E85 that tested to be E90. That motor, after jetting for best power for both carbs. and fuel lost 12 HP(687 on gas to 675HP on E90) at 7000 RPM and gained 22 ft lbs of torque at the same peark torquue RPM) by switching to the E90 The E85 carb(Holley 1150 CFM Dominator converted by AJ Castelinin on here) needed leaning down 3 jets sizes to get best power as I was testing in Klamath Falls , OR at 4399 Ft in the spring, the Holley #9375 non HP 1050 CFM Dominator carb. didn't need jet changes, it like the stock jetting on that fuel that day with that weather BTW, my new car on E85 is way more consistent from morning to late afternoon now than the other race cars where on race or pump gas IHTHs