E85 and stock fuel system - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 09-26-2008, 01:27 PM   #21  
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Originally Posted by Stephanie Turner View Post
markp ran E85 in his 99 car. It will lower your stoich tuning #'s. But otherwise I think he did not have any problems. Might want to ask him though.
OK thanks Steph.

I am thinking this might be worth a try as long as the fuel system compatibility is OK. I am thinking as a first cut for tuning, I could scale the whole fuel map (richer) by the stoich AFR ratios between gas and E85, which is roughly 50% IIRC. That is easy to do in Megatune. Then after that, do the usual WBO2 based log/tune/log/tune testing to fine tune the fuel map based on target AFRs for E85. Then, after that, play around with advancing the timing while watching/listening for knock.
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