Quote:
Originally Posted by LostCause
Does anyone know the octane rating of E85? It might be cool to build a high compression motor to get the best of both worlds: higher FE and cheaper fuel.
- LostCause
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When I first had a Subaru, I read the NASIOC forum, and there were guys with WRXs who experimented with E85, and concluded that it's great if you tune for it. Since it's equivalent to very high octane gasoline, it allowed really high boost pressures. Of course, for the Subaru WRX and STI, there is available an ECU-tuning device, so you can switch between modes optimized for different fuels, boost, etc., so it is relatively safe.
As an aside, if anyone is running a Yaris/Echo/Prius/xA/xB (they all have the same engine, except the Prius has different cams and timing, essentially) on E85, I'm curious to hear how it works out. I can't get it here, either, but I'd like to know.