Originally Posted by
Mekanic
1st, where are you buying E85? Not in the tampa area, so wtf are you trolling here for?
2nd, whats the dynamic compression of your car. As every study shows you need at least a 13:1 or better for ethanol usage.
Not to mention a tune for it, since the The stoichiometric value for gasoline engines is approx 14.7:1 air to fuel, whereas the "stic" for alcohol is around 9.x:1. Obviously, fuel tables for gasoline will not work when alcohol content is high.
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
