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e85 on a stock tune

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Old Feb 17, 2011 | 10:36 AM
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From: Austin, Tx
e85 on a stock tune

Who runs e85 on a stock tuned car? All I've got is intake, HFCs, and a catback. No tuning at all. Found a local station close by the house that has e85 for $2.59 vs. regular at $2.99 (can only imagine what premium is) and was debating trying it. What do yall think?
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Old Feb 17, 2011 | 11:29 AM
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I think you'll be needing a new engine.

The stock fuel system won't handle E85. You'll need new injectors, probably a new fuel pump, and definitely a tune. Once it's tuned, you won't be able to run normal fuel again.

Also you get less mpg out of E85.

So, is saving a buck this minute worth the repair you'll need an hour from now?
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Old Feb 17, 2011 | 12:05 PM
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You can't run e85 unless you car was designed to do so.
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Old Feb 17, 2011 | 12:12 PM
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E85 is cheaper, but your mpg will be crap... even avoid E10 if you can..
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Old Feb 17, 2011 | 12:41 PM
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speedracer g37
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I don't think you can avoid e10 or e15. I'm pretty sure all gas contains e some ethanol as a pollution reducer.
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Old Feb 17, 2011 | 02:11 PM
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Pretty much what I figured but thought I'd ask.

E10 is everywhere in Texas. I have yet to go to a town and not find it.
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Old Feb 17, 2011 | 09:36 PM
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Ethanol-free gas stations in the U.S. and Canada
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Old Feb 17, 2011 | 09:42 PM
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you should definitely run e85. it would be interesting to see how long the engine lasted before it completely craps out
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Old Feb 17, 2011 | 09:42 PM
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shell v power has no ethanol. You cant run e85, manual says so
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Old Feb 17, 2011 | 09:56 PM
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Originally Posted by Steveo47
shell v power has no ethanol. You cant run e85, manual says so
maybe in canada but in the states it still can contain ethanol
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Old Feb 17, 2011 | 09:58 PM
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Originally Posted by Steveo47
shell v power has no ethanol. You cant run e85, manual says so
Shell V-Power in Colorado has 10% ethanol as do all "standard" gasolines here in Colorado. This used to be only during the winter months but is now year round. While politicians will try to make you believe that it is an environmental issue, in reality, it is the result of the ethanol/corn growers lobby efforts to mandate ethanol use. The one thing it does is reduce dependance on oil/fossil fuels but there are open debates on wheter it really helps as it costs energy, provided by fossil fuels, to produce. The environmental benefits are really a trade off. Ethanol produces less of some harmful by-products and more of others.

As for running E85 (85% ethanol) in a modern automobile, it can be done without a problem as long as the automobile is tuned for E85. It may require different injectors in some applications but modern engines and fuel systems are made of materials that can handle ethanol. There was a good article I read on this that I might have found from this forum but I cant remember. If I find it then I will post a link. You can actually make good FI power with ethanol because it runs much cooler than standard gasoline and allows for higher boost levels without detonation. It is much less efficient though in terms of MPG as it takes a higher fuel to air ratio for optimal operation than standard gasoline or E10 (10% ethanol).
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Old Feb 17, 2011 | 10:07 PM
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At the husky here the 10% ethanol gas is considered 94 octane, and the v power with no ethanol is considered 91 octane. Do not run e85 in this motor, even the manual says so!
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Old Feb 17, 2011 | 10:19 PM
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hispeed-lowdrag
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Originally Posted by Steveo47
Do not run e85 in this motor, even the manual says so!
holy ****, the manual helps with stuff? I bet if people started actually reading their manual then half the dumb@ss threads on here would disappear

I still think you should run e85 and time how long it takes for the engine to go out
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Old Feb 17, 2011 | 10:22 PM
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^^^ lol.
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Old Feb 17, 2011 | 10:38 PM
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The 3 main changes required are injectors, fuel pump and updated tune all to make sure that a sufficiently rich fuel mixture can be achieved.
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