Re: E85 usage

Posted by ChadS on June 28, 2005 at 13:30:38 from (66.228.96.208):

In Reply to: Re: E85 usage posted by Leland on June 28, 2005 at 11:51:18:

its too "hot" to burn. The computer in auto/trucks cannot compensate for the changes ethanol creates in the combustion chamber, and exhaust gasses. Ethanol, in my opinion is a substitute for octane booster, and E85 is just like trying to run 120 octane, in an engine that only requires 87. It falls on its face because the engine cannot burn it properly due to the computer settings to run on regular unleaded pump gas, and rpm. See, Ethanol burns much cleaner than gas, computer, then tries to compensate by richening the mixture, then it begins to flood out, you wont see it in plug color, cause it burns so clean, as rpm increases, it begins to lose power, beacuse the computer is not set up for the different characteristics that is created by the ethanol. Gas is a very dirty burning fuel, and is more explosive than ethanol. If you would mix 1/2 tank of E85 with 1/2 tank of 87 or your favorite pump gas, it would run better because the gasoline gives it a more explosive burn, where ethanol is so hard to ignite. Your S-10 dropped fuel milage, because the computer thought, it needed more fuel, because the emmissions were so clean, making the computer think it was running lean. Can a engine run on pure E85? A fuel injected engine will not, as well as a carburated engine, no computer to screw up the fuel settings, also if your trying to run e85 straight, you must have a compression ratio of atleast 12 to 1, it loves compression, and more compression, it does not have much trouble igniting the fuel. I can tell you this much, I can run a gas tractor engine, at 300 psi of compression at cranking speed on a mix of 50/50 E85, and 93 octane pump gas, and not preignite, or dentonate, and do it with less actual octane than most racing fuel contains. It is a very slow burning, hard to ignite fuel. Think of E85, more like octane booster, rather than a regular fuel. Been running it for 15 years now in pulling tractors with compression ratios ranging from 7to1 up to 15 to 1, and run good on it, but, its not pure E85,,, its cut back with 93 pump gas. ChadS

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