Originally Posted by manisusmc
just because the octane rating is 105 doesn't make it better, regular old 93 has more contained energy that e85, I'd guess that one reason you'd make more power with the E85 might be because it's using so much more and is working as an extra engine coolant.
105 octane sure does make it better...that's why high performance cars use higher octane fuel. I will be converting mine and dyno tuning it on E85 in the near future as well. I have many friends with boosted cars (also some with N/A V8's) that have picked up 20-35+ RWHP from switching to E85 and getting tuned. It's like running race gas all the time for half the price of 100 octane pump gas. The only thing I'm worried about rite now is what the AFRs will be like with all the mods I'm doing...and then to switch to E85 on stock tune(until I can get on the dyno). Unfortunately the only way to find out is to test it and hope for the best.