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      11-05-2012, 07:37 PM   #5
pbonsalb
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Drives: 08 E90 M3, 99 E36 M3 Turbo
Join Date: Feb 2011
Location: Concord, NH

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You would need a tune because E85 requires about 1/3 more fuel and uses a different AFR for stoichiometric and peak power. It could be done, but you would have to find a tuner who would be willing to make you the tune, and you would be paying for some dyno time and tuning time. I doubt ESS would warranty the result.