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Old 01-26-2008, 05:19 PM   #4 (permalink)
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Originally Posted by bennelson View Post
I have also heard that there is less fuel efficiency with E85 than gasoline, so you really aren't saving on cost per mile.
We've done fuel testing on E85 at my university on a combined fuels research engine and this only held true if we kept the compression ratio for gasoline (pretty low). Once we increased compression ratios we immediately saw better efficiencies out of the fuel. We also did some testing with the timing and got some improvements out of tweaking that, moving it slightly further from top dead center.
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