Regardless of gas mileage, what kind of power could be extracted from using E85 over 93 octane on 11.1:1 compression? I would assume you could use more timing since it is 104 octane. The best part about it is how cool it runs making it ideal for racing. I have an S300 in the garage so it would be easy to switch between tunes.

 

From what I've read 5-10 HP, but the biggest concern is that e85 isn't regulated as hard as regular pump gas is. Basically meaning and the octane levels could vary slightly so I would push the limit to hard on the timing.

 

I did some reading and found that E85 has a summer blend and a winter blend. WTF is this coffee? Lol. Is E85 different percentages from station to station or what? The biggest gripe I have about it is that it attracts water very easily. 5-10whp would be a great gain to see, I'm most interested for the cooling factor in a race environment.

 

The experience I have with e85 is the mix may change slightly but not enough to affect the tune or how the car runs. I have tuned a stock b16, 380HP b16 turbo, 500HP 2.1l GSR all on e85. IMO the gains on a na car aren't worth the additional stops to the gas station on a daily driver. If it's not a daily there is no reason to not go e85. The ONLY downside I have actually seen is the slight reduction in gas mileage. A stock GSR should still get around 23-35mpg in town driving easy though.

 

Yeah I only plan on using it for track days. Otherwise I will run 93 octane.

 

How the hell do you get a 12mpg variation??

 

23-25mpg. Sorry.

 

11.1 compression ratio in what? Specs on setup? You left that big major factor out...as stated, all motor sees minimal gains across the board, boosted is a whole nother subject..

 

It's just a bolt on 98+ B18C-R, Toda 4-2-1 header, Comptech Icebox intake, 60MM piping out the back, ID1000cc injectors... my baseline with stock everything was like 173WHP and 124FT LBS or something. Now I have all that and a S300.