E85LSX is exactly right, we've done quite a few cars, both n/a and boosted. most recently a 2000 camaro, 11.5:1 compression, huge cam with ITB's, and the throttle response was freakin' amaaazing!! we had previously tuned on 91, but the ethanol tune picked up just under 30 rwhp. before that, an '07 vette with long tubes and a magnuson. that car picked up more than 60rwhp over gas, response was equally as wicked too. best part of the maggie car tho-intake air temps dropped over 40 degrees, even tho the IAT is located several inches upstream of the injectors!! we will be tuning a twin-turbo G8 soon, made 550 on gas with tons of kr-even with methanol, anxious to see that one done. i have a looong list of similar comparisons, feel free to ask......