Quote:
Originally Posted by Bimmer07
I am in the same situtaion. Just tune (cobb preferable) and no other mods. Is it safe to go with Cobb and 91 octane ? Because I'm in Cali and I havent seen any gasstations here offering anything above that. And would I stillget 60WHP?
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Hey what's up SoCal. @AEenma is correct, I have done testing with E85 pump with ACN 91. Unfortunately COBB Sport and Agg. is too aggressive for ACN 91, according to my testing. To run S1 Sport and Agg. Blend in 20% E85 pump then you can.
Take a look at the timing corrections graphs, these were based upon my logs and testing.
http://www.e90post.com/forums/showthread.php?t=696472
The pros out weigh the cons. I use propel fuel E85, good quality and there are a couple near the LA area. I wouldn't mix in more than 25% you will begin to exceed your fuel trims. Or you can use ATR to adjust, but you'll be fine if under 25% E85 pump and or with the proper tune MAPs.
Enjoy, S1 Agg.
Edit
Remember, 20% E85 (3.2 gallons) is not 20% Ethanol. Use this calculator. To compare apples to apples, E85 is about 96 AKI octane. To 91 AKI ACN octane.
http://www.intercepteft.com/calc.html