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RE: Don't Get Carried Away

Comment comment by VnutZ on 01 October 2007

A couple of things puzzled me though. I don't get where they can claim that it's "corrosive to engines". Ethanol requires different fuel tanks and seals throughout the fuel system because Ethanol is a solvent to some of the compounds which are resistant to gasoline. No big deal.

Perhaps I misspoke. You need to replace all of the rubber/plastic hoses and fittings with metal ones before they are "eaten through" by the ethanol. At least in higher percentage blends.

Other than that, the only difference between a regular car and your E85 "FlexFuel" is a chip which adjusts the fuel injector flow to keep the fuel/air mixture tuned for the amount of ethanol/gas ratio with air as your current chip tunes gas and air alone now because of the slightly different burning characteristics.

Correct - there is some good reading in the technical documentation of the MegaSquirt community developed ECU which outlines what alterations you need to make to the programming to get an "efficient" burn of ethanol. The changes range from fuel injector timing (for the ratios), ignition timing and how to treat O2 sensor input for trim levels.

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RE: Don't Get Carried Away by PowerPointSamurai :: NR7

No, you quoted the original article accurately--that's what they said. I am just curious what they mean by "corrossive to engines", because the fuel system seals and plastic parts (like the fuel tank) are the only things I know of.

Posted 01 October 2007, Hide, Parent, Reply