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Author Topic: Tuning E85  (Read 1893 times)

Dirty_Mech_Style

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Tuning E85
« on: August 07, 2012, 01:19:24 PM »

Looking to tune e85 with decapped wrx injectors and crome.  No idea where to start i cant find shit on the interwebs.  Anyone using it themselves?  And where do i start ??
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JaredKaragen

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Re: Tuning E85
« Reply #1 on: August 07, 2012, 08:11:37 PM »

pgmfi.org forum;  newb section =)


basically:  its 1.6X fuel than gasoline;  expect +5-15* ign depending on how the car behaves.

tunes out like any other fuel.
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DreaMeR

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Re: Tuning E85
« Reply #2 on: August 16, 2012, 05:04:19 PM »

Just recently threw some e85 in my car.  Stock d15b7. Stock injectors. Added 36% to my fuel maps. Still need to adjust cold start inrichments but when warm fires right up.
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kgx

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Re: Tuning E85
« Reply #3 on: August 19, 2012, 12:41:43 AM »

I added 23% and was pretty much right on the money, but my gas maps were pretty rich to start with. I also run decapped WRX injectors.

If you run open loop, you can actually get pretty decent mileage on the highway too. I average 27-28mpg. One trick is to keep the maps pretty lean up into lower boost (4-5psi) so it doesn't dump fuel as you go up hills, etc.

A few of the basic settings were (this is for an MR2 turbo/3SGTE, 1998cc):
injector offset- 64.00
cranking- 1.7 (you need to inject about 3x the fuel to get it to start when cold, but it will start)
post fuel- 20, 20, 20, 20, 18, 11, 7, 0
Crank fuel comp- 65, 65, 65, 65, 59, 36, 23, 0

It's probably not anywhere near optimal, but it drives better than the POS toyota ECU ever did. Someday I'm going to drive it to NC and throw bottles of whiskey at JD until he tunes it.. er, fixes my dumbfuckery.
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