Originally Posted by Moparrbust
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.
Manisusmc has it right.....gasoline has more energy potential per gallon than E85.
Octane doesn't equal power, a higher octane rating means the fuel is less likely to ignite. The reason race cars use gas with a higher octane rating is typically to prevent detonation in the cylinders. this is usually caused by very high compression ratios, very advanced timing, or a combination of both.
As a sidenote, Bikecop, did the kit include all the replacements for the rubber parts in your fuel delivery system? The stock rubber parts cannot handle the E-85 long term. I'd definitely keep an eye on them for signs of degradation if they haven't been replaced.