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Author Topic: E85 Fuel Engine Build  (Read 695 times)
Dadeeo
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« on: July 14, 2009, 10:00:50 AM »

Terry

Have you ever built a motor based on E85 fuel? It is 105 octane and normally fifty cents cheaper than regular 91 octane gas. Seems like that would make for a very nice street/dune motor and a great alternative/compromise to 110 racing fuel for a daily driver. My 2.2 Subaru is the B spec closed deck factory built Turbo motor so with 105 octane I should be able to get aggressive with the boost and ECU maps to crank out a few more ponies.

Terry F.
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BLU-BY-U-II
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« Reply #1 on: July 14, 2009, 11:40:26 AM »

We haven't done an E85 yet, but its basically the same as running methanol, which we do alot of. U just need to run more fuel to it and maybe change the timing some. I can check to see what is considered proper A/F ratio for one. Also U might talk to Larry (cool3800) hes running a supercharged 3800 on E-85.
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BeefyBoy
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« Reply #2 on: July 14, 2009, 04:51:56 PM »

all of a sudden Im interested in going green... 
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AFR_CJ5
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« Reply #3 on: July 14, 2009, 07:54:38 PM »

I was actually going to talk to Terry about doing this with mine, but I had heard a lot of mixed reactions with E85 and nitrous, so I opted not to at the time.
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cool3800
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« Reply #4 on: July 14, 2009, 10:19:27 PM »

Terry

Have you ever built a motor based on E85 fuel? It is 105 octane and normally fifty cents cheaper than regular 91 octane gas. Seems like that would make for a very nice street/dune motor and a great alternative/compromise to 110 racing fuel for a daily driver. My 2.2 Subaru is the B spec closed deck factory built Turbo motor so with 105 octane I should be able to get aggressive with the boost and ECU maps to crank out a few more ponies.

Terry F.

I've been running a supercharged 3800 for past 3 years on E85.  I'm running bigger injectors, fuel line and high volume fuel pump.  Dynoed engine on both gas and E85.  On E85 engine made more torque and more HP.  As Terry said - you can also run a lot more timing & boost.  The other advantage is the engine runs much cooler.  I haven't really found any disadvantages - my engine is set up to run gas or E85 - I prefer E85.

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Dadeeo
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« Reply #5 on: July 15, 2009, 11:08:04 PM »

cool3800
Who did your ECU tuning? And did you have to go all stainless and teflon in the fuel delivery system?
Thanks, Terry F
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cool3800
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« Reply #6 on: July 16, 2009, 09:35:44 PM »

cool3800
Who did your ECU tuning? And did you have to go all stainless and teflon in the fuel delivery system?
Thanks, Terry F

i'm running stock (re-calibrated GM computer).  I used teflon fuel lines and hard anodized fittings and a fuel pump that will accept methenol & ethenol.  No paper filters either. 
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Atvnut
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« Reply #7 on: March 10, 2010, 05:18:23 AM »

If your going to use this in an engine from the pump you might want to test your fuel regularly and the test kits are cheap http://www.fueltestkit.com/ any race engine should be using the test kit just to be consistent just my 2 cents. The racing fuel people were already nice enough to offer e85 as a race fuel just a much better and more consistent blend. now come on pump gas only rules Smiley
« Last Edit: March 10, 2010, 05:20:10 AM by Atvnut » Logged

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cool3800
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« Reply #8 on: March 10, 2010, 06:02:38 AM »

If your going to use this in an engine from the pump you might want to test your fuel regularly and the test kits are cheap http://www.fueltestkit.com/ any race engine should be using the test kit just to be consistent just my 2 cents. The racing fuel people were already nice enough to offer e85 as a race fuel just a much better and more consistent blend. now come on pump gas only rules Smiley

I've been testing my fuel (out of the pump) and it's been very consistent. 
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sandtoy6
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« Reply #9 on: March 10, 2010, 08:44:31 AM »

any bennefit to running e85 in a nonsupercharged 3800?I've been wondering about that and where to get e85 around the dunes. Where did u get your fuel pump and lines?
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« Reply #10 on: March 10, 2010, 09:51:11 AM »

I have been doing some research on E-85, and heres a few things I have learned. The E-85 U buy at the pump can be very inconsistent, anywhere from 70% to 90%, Thats why some of the race fuel company's have stated blending there own so its consistant and if U get checked your fuel is legal if your running an E-85 class. Basically E-85 is 85% ethanol and 15% gas and other additives.So U can see if they change the percentage of menthol it will change the fuel alot. Will this affect your normal engine ? A little but probably not a bunch. Will it affect a good race engine? U bet, a bunch. It would be better on the computer engines because the computer will make some slight adjustments to the fuel and timing to adjust for inconsistencies in the fuel.  Were building an engine now for a guy thats going to be running E-99 fuel in a dirt late model engine. E-99 they said is basically everclear with 1% gas put in it so people wont drink it. 
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Dadeeo
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« Reply #11 on: March 10, 2010, 01:07:25 PM »

You might be surprised at what a wine-o will drink!  LOL!
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