Quote:
Originally Posted by Chronology
Sorry, I assumed if running e85 some type of GM style fuel sensor would be in place to tell the ecu the actual mix. If the tuner tunes it to e85 and your true ethonal is 70s does a non flex fuel tune work? Would that work the same way as running 91 vs 93?
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With different blends of ethanol the fuel trims will sort that out, however this case it's so far out the trims are maxed out. As for timing, you may be fine with E70 or higher running similar timing due to MBT, I cannot fully comment as we don't have E85 here so not tuned for it.