I'm looking into doing this because E85 is actually cheap race gas oct levels, believe it or not. Guys running it in boosted or turbo cars are seeing huge increases in power. I'm looking to close the gap from the tune Evo's and Sti's in my racing group. They have me in pure TQ but I've got them in HP, so if I can close the gap it makes it a no brainer. Our cars should respond to this kind of fuel because of it's higher compression ratio.
Anyone out there having good results yet with this?