Thread: E85 fuel FAQ
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Old 02-11-2013, 11:38 AM   #2637
Scooby Specialist
Member#: 172698
Join Date: Feb 2008
Chapter/Region: MWSOC
Location: Des Moines, IA
11 STi BW 8374 E85
02 v8 Spec C E85


Originally Posted by WRXVishnueStg_2 View Post
Sorry to open up an old thread. Okay I need a new thred, I'm old to Subie's new too NASIOC. I need tunning info for E85 & STI Pinks 565cc on a 2.0 Buggeye.

As for E85, production cost are mainly in transportation, can't see how it cost more to make, when all you have to do is distill it, it's Alcohol. I also love the MPG due to the turbo catching more fumes to spool. I get about 25-26mpg on 93 Octane in the city, and about 23-24mpg on E85. Currently here in Miami, it's 3.45$ for a gallon of E85 vs 3.99$ for a gallon of Premium (93 Oct) Thanks, any help is greatly appreciated.

My bad, tried to refresh didn't see my old post and thought it was deleted due to posting in the wrong thread, cause I couldn't find one on the Info i needed. Admin, please help and delete this second post.
You might get more help with E85 related things by posting in the E85 Army thread but STi pinks really aren't big enough for E85, even on a TD04. For ethanol blends around 70% which is all we had last year in Iowa, I was finding that injector scaling need to be about 74% of gasoline scaling. That scaling applied to 565's would put them around 420 which really isn't going to be enough to run higher boost on the TD04 and keep your AFRs reasonable. I have a couple guys running 650's on E85 2.0l TD04 setups and they get to around 85% IDC running 23/24 psi tapering to 16/17. Again, this is on E70. If we see higher blends like we used to, they are going to need all of that extra headroom.

Anyway, I hope this is helpful. Good work on your fuel economy. How lean are you running at cruise and what kind of timing to get those numbers?

You should also post a video of taking the TD04 up to 28 - 30 psi. I've never seen that before.
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