Retune for E10?

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Jun 11, 2012 | 10:03 PM

30thblackcam

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From: Decatur, AL

Retune for E10?

If my car has already been tuned with the stock stoich ratio of 14.68:1 is there any need to retune it if I change it to the E10 stoich ratio of 14.13:1? If so, what steps should I take? I know PE will stay the same since it is an equivalent ratio. Thanks for any help.

Jun 11, 2012 | 10:05 PM

30thblackcam

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From: Decatur, AL

Forgot to mention that I will be using HP Tuners.

Jun 12, 2012 | 02:33 PM

stangtrader

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From: PNW

Im assuming you were already running pump gas? Reason I ask is most pump gas is e10, on the west coast that is

Jun 13, 2012 | 12:25 AM

30thblackcam

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From: Decatur, AL

Yeah it was tuned on e10 pump gas. Just started looking into e10 and found in my research that the e10 stoich is different than pure gas. Pretty much all we have here is e10 at the pump as well.