Originally Posted by
homemade wrx
1st point: I had a contract setup through one of our FSAE sponsors, Delta T since e85 is hard to find at the pump.
2nd point: you have your facts all wrong there. For e85 to be burned efficiently in a naturally aspirated engine, it should have 13.5:1 (or so) CR. That is also because of the octane rating of E85. The stuff you are buying at the pump isn't 93octan + ethanol. Is it 93 octane with the ethanol mixture taken into account
well, with e10 fuel having very little and very dissimilar properties to ethanol (as you gave the properties of) and the acts and performs and burns very similarly to "typical" gasoline (which stoich will usualy cary from 14.7-15.2:1); standard gasoline maps operate fine on it and don't have issues that can't be corrected for with the sensors in the system. As I stated, most OEM systems are capable of running and handling without an issue up to 30% ethanol mixture. The other nice thing that you don't know, as you must not have done your research or testing very well, is that ethanol actually likes running a bit lean
1. Cool, thanks for answering.
2. I never said it was, I know the octane rating is still true due to it being compensated for the ethanol in the fuel. I said 13:1 or better, 13.5:1 is better. You still didn't answer about the dynamic compression of your car.
3. Everything I've read says the stoich of E10 is closer to 13.8. And what sensors are you referring to? Seems like an awful lot of work for something that shows so little promise.