Tuning N/A 110 octane

1slow370

less power ethanol is 10% less volitale than gasoline. you could push the timing but you'd never get all the power or milage back. FI it has merits just because of cheap high octane. You still make less power per unit of fuel but with a turbo you just shove in more air and more fuel and the higher octane makes up for it. i plan to stick with the readilly available stuff so i'm mixing 5% toluene in premium. and thinking of adding in some MMT and ferosene.

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CZero

Use xylene if you're going to do that. Toluene is 114 octane while Xylene is 117 octane and they cost nearly the same. If you do mix that in it's a good idea to put in around 3 oz of Marvel Mystery Oil with your toluene/xylene.

I've run a high amount of xylene in both my 06 gti with a apr s3 turbo kit on 100 octane mode and my '86 944 turbo with a t04e 50 trim at 23 psi. It really does work wonders when mixed properly.

They used xylene in F1 back in the day when they could use turbos. They actually ran 86% or so xylene and the rest filler to meet the octane requirements back then.


As far as E85 goes, you could indeed use it to great advantage in a NA car. However, you would need to raise the compression ratio quite high for it to be worth it. I think I've seen 13.5-14:1 C/R with E85 all motor. Otherwise the timing advance, like previously mentioned, just won't be enough. Too advanced of timing doesn't do anyone any good no matter what fuel you're running.

1slow370

exactly high compression would do it but i think the prospect of this thread so far is more of without having to rebuild the engine to do it. If your going that far then just throw in some 2000cc injectors and run nitro. Also do NOT run methane as the main fuel in our cars, it doesn't agree with an all aluminum motor.

also where do u get your xylene, can i pick it up at sherwin williams? they carry automotive grade toluene for $33 in the 5 gallon

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CZero

Yep, Sherwin Williams. Here in Texas they sell it for 10 bucks a gallon when you start an account with them. So nowhere near as cheap as $33 for 5 gallons, but still a good price now a days.