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post #1 of 8 (permalink) Old 11-02-2013, 11:00 PM Thread Starter
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E85

any one ever convert there 3.8s to run on e85 ive been wanting to convert for a while but don't know where to start any input would be great thanks

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post #2 of 8 (permalink) Old 11-02-2013, 11:13 PM
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It's doable. You'll need a better fuel pump, bigger injectors, and a tune. To see any noticeable gains, you'll want more compression. You'll gain maybe 11% of your current horsepower. You'll burn about 20% more fuel as compared to gasoline. At 9.2:1 compression, I did notice a difference, but not much. Keep in mind, this is with two extra cylinders. lol Now that I have 11.2:1 compression, the difference between E85 and E10 is more pronounced, especially at lower RPM. It feels more torquey.

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1996 Thunderbird LX. Gone, but not forgotten Oct 1995-March 24 2016 Trick Flow headded, E85 guzzling beast.

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post #3 of 8 (permalink) Old 11-02-2013, 11:41 PM
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My coyote f150 is e85/flex fuel ready, I just noticed the new station down the road has it...considering trying it

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post #4 of 8 (permalink) Old 11-02-2013, 11:46 PM
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Originally Posted by Earl View Post
My coyote f150 is e85/flex fuel ready, I just noticed the new station down the road has it...considering trying it
Don't expect much of a difference unless you get tuned to take full advantage of the extra anti-knock capabilities.

Michael M. ASE P2 Automobile Parts Specialist.

1996 Thunderbird LX. Gone, but not forgotten Oct 1995-March 24 2016 Trick Flow headded, E85 guzzling beast.

1985 Mustang GT. modified stock Holley 4180C, Weiand Street Warrior intake manifold, equal length headers, true dual exhaust, 5 speed, 3.55:1 8.8'' rear end, Ford Racing 10.5" clutch.

1998 Mustang GT premium. Trans Go shift kit, Bassani catted x-pipe, PI heads, cams, intake swap, Accufab elbow, SCT Xcal 4 tune, Eibach Pro-kit, Maximum Motorsports Caster/camber plates, fat tires. Banging audio system.
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post #5 of 8 (permalink) Old 11-02-2013, 11:58 PM
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Originally Posted by Mgino96tbird46 View Post
Don't expect much of a difference unless you get tuned to take full advantage of the extra anti-knock capabilities.
I'm thinking definately no tunes, ford is getting very serious about that stuff, back to stock or not, these days, a tune is an instantly voided warranty, no thanks...truck has plenty of power, stock is nice.

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post #6 of 8 (permalink) Old 11-03-2013, 01:32 AM
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Mgino96tbird46 makes some good observations. in addition though to more compression, you also need a better timing curve as well. one more thing, if oyu convert to E85, i suggest wiring in the ford flex fuel sensor to your system, and adjust your tune accordingly. i would also suggest pushing your compression ratio to no more than 10.5:1 so you can still use the lighter fluid we currently call gasoline. and yes there is a madness to my method, unless you are going to stay with in range of a station that carries E85, you may need to switch back to E10, so you should have that capability should yo decide to go on a long trip. just my opinion.

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post #7 of 8 (permalink) Old 11-03-2013, 07:41 AM
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Originally Posted by rbohm View Post
Mgino96tbird46 makes some good observations. in addition though to more compression, you also need a better timing curve as well. one more thing, if oyu convert to E85, i suggest wiring in the ford flex fuel sensor to your system, and adjust your tune accordingly. i would also suggest pushing your compression ratio to no more than 10.5:1 so you can still use the lighter fluid we currently call gasoline. and yes there is a madness to my method, unless you are going to stay with in range of a station that carries E85, you may need to switch back to E10, so you should have that capability should yo decide to go on a long trip. just my opinion.
That's pretty much what I do, sans the flex fuel sensor. Even at 11.2:1, I can still use E10, it just doesn't run as good as it would on E85 due to a less agressive timing schedule.

Michael M. ASE P2 Automobile Parts Specialist.

1996 Thunderbird LX. Gone, but not forgotten Oct 1995-March 24 2016 Trick Flow headded, E85 guzzling beast.

1985 Mustang GT. modified stock Holley 4180C, Weiand Street Warrior intake manifold, equal length headers, true dual exhaust, 5 speed, 3.55:1 8.8'' rear end, Ford Racing 10.5" clutch.

1998 Mustang GT premium. Trans Go shift kit, Bassani catted x-pipe, PI heads, cams, intake swap, Accufab elbow, SCT Xcal 4 tune, Eibach Pro-kit, Maximum Motorsports Caster/camber plates, fat tires. Banging audio system.
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post #8 of 8 (permalink) Old 11-03-2013, 08:16 AM
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Quote:
Originally Posted by Mgino96tbird46 View Post
That's pretty much what I do, sans the flex fuel sensor. Even at 11.2:1, I can still use E10, it just doesn't run as good as it would on E85 due to a less agressive timing schedule.
its not a bad way to go, i just tend to prefer everything work as seamlessly as possible, preferably to the point where no one can tell what fuel i have in the tank. but what ever works for you is the best way to go.

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