thendawg

So Ive spent awhile on YB and here and cant seem to find much of a consensus. Has anyone tested E85 vs 93 on an N/A motor with 12:1-12.5:1 compression? Ive seen alot of stock comp tests, which as expected dont pickup more than 5-10whp, but nothing with bumped CR. Im a big fan of E85 on turbo cars (my last 2 both used E85), but havent had any experience with it N/A. Just kind of wondering what kind of gains I might see on the 402 stroker Im starting on. Plan is 12:1 CR, but ultimately that will depend on what I do heads wise.

Gray86hatch

iTrader: (83)

On mine it was worth some power. my guess is 15-20hp

I was able to put a hoter plug in it with more timing

Tim

Nebulus

iTrader: (14)

Try looking for 93 vs C10 (108 oct), it should give you a good ballpark idea. E85 is roughly 105 octane, depending on whether it's truly 85% ethanol or not. E100 is roughly 110 octane

Exidous

iTrader: (11)

As long as you up the compression as well there will certainly be gains. Just swapping fuel will not net you very much accept a couple more degrees in timing with diminishing results.