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      02-11-2013, 10:58 PM   #6

Drives: Current:135i Sold:335i sedan
Join Date: Mar 2007
Location: City of Angels

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Originally Posted by pinky_and_me View Post
So if you upgrade the LPFP would running 100% e85 give you those numbers or do you still need meth/race gas?
I dont think anyone with RB turbos has run 100% e85. And even then I dont think so, meth is being used to cool the charge and as a fuel when boosting 20psi. Remember e85 is cheap race gas. People breaking 500whp on RB turbos are using Race gas (MS109) and meth. Not race as in 100octane from pump.

E85 is great but mpg drops so much when you get into high mixtures of it. If you literally dont have a e85 station within 10 miles, then running 50% or more e85 is just crazy. Because more than likely you'll be filling up twice a week.

On pump gas I get about 21mpg, on a 20% e85 mix I get 19.5mpg, on about a 80% e85 mix I was getting 15mpg.

If I had to throw out a number I'd say a car running RB turbo with e85 mixture would not be able to break 500whp. It would break 500wtq easily.