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Old 08-27-2009, 05:49 PM   #1
wantsti
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Default What do you need to do to use E85 fuel?

What do you change on your car if you want to run E85 fuel?

I know you will have to get a tune but what else?
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Old 08-27-2009, 06:14 PM   #2
06HAWKMAN
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injectors and tune
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Old 08-27-2009, 06:35 PM   #3
Kastley85891
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Injectors Fuel pump or two depending on turbo.

Last edited by Kastley85891; 08-27-2009 at 07:44 PM.
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Old 08-27-2009, 06:49 PM   #4
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They have an article about it in the new Modified mag (I think) about the CST Subaru that runs on E85. It's the tuner shoot out with three cars on the cover. They had to run huge injectors and I think 8 of them with duel fuel pumps but it is a race car.
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Old 08-27-2009, 06:55 PM   #5
wantsti
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I'm just stage 2 so stock turbo. What size injectors would I need?
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Old 08-27-2009, 06:57 PM   #6
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E85 is for weenies.





I run on JP-5 and gypsy tears.
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Old 08-27-2009, 07:01 PM   #7
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850's will support up to 400 whp, so stock turbo no probs, anything more its 1000's or biggers and def twin pumps
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Old 08-27-2009, 07:04 PM   #8
wantsti
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So will my stock fuel pump be fine too?
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Old 08-27-2009, 07:24 PM   #9
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You can't push that much fuel with the stock fuel pump. A walbro is only like 90. If you are thinking of 450 for injectors and 400 for a cobb tune. 90 isn't much more.
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Old 08-27-2009, 07:34 PM   #10
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Quote:
Originally Posted by wantsti View Post
So will my stock fuel pump be fine too?
255 for sure
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Old 08-27-2009, 08:35 PM   #11
godfather2112
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If you are asking this question and not searching, I probably wouldn't recommend running E85
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Old 08-27-2009, 10:38 PM   #12
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Why do you want to use E85? There are only 3 E85 gas stations in Utah. You use 30% more fuel also. Just get tuned on race gas and use it at the track.
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Old 08-28-2009, 12:03 AM   #13
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It's a perk to be able to make different maps for some of you. Full time, I wouldn't do it in Utah on a daily driver. For some of you doing open source tuning or virus maps, it's a good exercise to work with a good fuel. Just 30% ethanol staves off detonation and doesn't require much of a bump in fueling.

The stock parts do well, but it needs some love in the fueling department. A Walbro 255 helps, but you need bigger injectors for full E85. Splash blends are popular, too. Don't be shy of just using 30% or 50% ethanol, either. Colder plugs rock out, too. I swear by BKR7E11 NGK-Rs with a tight gap.

I always end up adding a few gallons of 91 to my E85 just to put some heat in the block. After years of using e85 I can say that it almost does it's cooling job too well. 30% and 50% blends will work just fine for most of you on an experimental basis without extensive fuel system mods.
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Old 08-28-2009, 08:49 AM   #14
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so hamfist, you aer saying to USE a 1 step colder plug? I am not down with the "lingo"

Quote:
Colder plugs rock out, too. I swear by BKR7E11 NGK-Rs with a tight gap.
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Old 08-28-2009, 12:20 PM   #15
wantsti
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Quote:
Originally Posted by bhhamblin View Post
Why do you want to use E85? There are only 3 E85 gas stations in Utah. You use 30% more fuel also. Just get tuned on race gas and use it at the track.
Because it would be an easy way to get some more power with out running $8.00 a gallon gas, and there is a station right by my house where I can get it.
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Old 08-28-2009, 12:22 PM   #16
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Are you going to bring gallons of gas with you to the track? You'll use it fast.
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Old 08-28-2009, 12:25 PM   #17
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ya, 1 track day it about 1 tank of gas. You won't make it there and back on a tank of gas. I would suggest bringing 15 gal at least to the track. 5 gal to fill up once you get there, 5 gal just in case you run out there ( you will burn 1/4 tank getting to milller from Clearfield) 5gal to get you home, hopefully and 5 gal to get you home, hopefully.
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Old 08-28-2009, 12:29 PM   #18
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I wish I could only use a full tank on a full track day Im 1/2 tank per session.
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Old 08-28-2009, 12:31 PM   #19
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isnt there a lot more you could do to your car before you worry about using e85?
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Old 08-28-2009, 12:38 PM   #20
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Sure there's more he could *do*, but there's not much to do for him to simply use more ethanol. It's more about user training than getting new parts when it comes to ethanol use.
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Old 08-28-2009, 12:40 PM   #21
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im not sayin so much the ethanol at all but that if he is sitting at stage 2 there are other parts he could get rather than simply worrying about cheap power you know?
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Old 08-28-2009, 12:41 PM   #22
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Quote:
Originally Posted by bhhamblin View Post
I wish I could only use a full tank on a full track day Im 1/2 tank per session.
That's true, and with e85 it will be more fuel being burned.

I ran out on the track once a few years ago. I usually top off when I get off 84 before the track and fill up on the way out of town.
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Old 08-28-2009, 12:56 PM   #23
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If im using a 1/2 per session on normal gasoline. Id probably be about 3/4 a tank with ethanol lol.

I sure love how the stuff smells.
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Old 08-28-2009, 01:31 PM   #24
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It's weird on paper, but makes sense underfoot. With making more torque, I'm in the throttle less which preserves my mileage. That only works on the street, though. A track session will indeed see worse mileage. However, my driving style changes with more torque. I shift sooner coming out of corners and don't have to rap the car out to redline to see times drop.
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Old 09-02-2009, 07:32 PM   #25
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Here is what Cobb in Texas did on a stage 2 STi with 850's on E85.

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