[Nacs Fab]

Originally Posted by SRGN

E85 gains are more pronounced on boosted combos, I don't think you will gain much over your current fuel and combo. Your car is hauling pretty good, you might get more out of it with a converter change vs a fuel switch. You are getting close to where a 4500 flange carb would free up some power. With E85 you may also need to upgrade the fuel delivery system as you need about 35% more volume of fuel to make the same power.

I would say the boosted gains is due to cooler IAT's. On my engine dyno simulator I've made 60+hp just switching the fuel (Boosted Application), but not sure if its absolutely true. They claim up to 5% - 15% HP Gains in a boosted application.

[johnta1]

Technically, the E85 should be quicker. (and run cooler)
Should be around 10% more HP. (properly done)

Your CR is good, could use more with the E85.
What's your dynamic CR? the higher would help also.

Methanol would be even better!

I'd say possibly 1-2 tenths with correct tuning for it. (E85)
I'd also say injection would be better, because it takes a lot more fuel flow to make the power at higher rpm range.

[SRGN]

Originally Posted by Nacs Fab

I would say the boosted gains is due to cooler IAT's. On my engine dyno simulator I've made 60+hp just switching the fuel (Boosted Application), but not sure if its absolutely true. They claim up to 5% - 15% HP Gains in a boosted application.

Lower IAT and cooler combustion, 2 things that are conducive to power production in a boosted combo. E85 is a great fuel for boost, far more dramatic than the gains in an NA combo. I have zero experience with nitrous and E85, but wonder how it would work. Back in the old 5.0 vs Turbo Buick days, I was on the Buick side of things and have been a boost guy for decades. The other side loved nitrous, we all learned a lot from the rivalry there. Before I derail the thread, I'll go back to the original topic. I could be wrong, but I don't feel like there's going to be much gain over race fuel in this case.