are you saying that i need much larger injectors than stock or the 850cc and 1600cc that I have?

If you needed all of 4900cc worth of injector to support whatever power you had on gasoline, you will need much more to support the same power on e-85.



Someone earlier posted the 1600s originaly came from FFVs. Thats not cause FFVs make huge power, its cause the fuel they may use usually wont have the same ideal AFRs as gasoline, requiring more fuel.

I'm not an expert in alcohol tuning but little I know, those run Ethanol could run higher boost and timing etc as its less prone to pre ignition etc as it runs cooler..



So in my theory, I think you could run higher boost to compensate for increase power per volume used. Does this make sense?? If you go by the same tune for gasoline, yes, I agree, you would use much much higher volume of E85 vs gasoline. Also if you kept at at same boost..

Do you mean raise boost to compensate for more volume of fuel needed per horsepower? If so, no.



Under ANY tune, you will consume more E-85 than gasoline to achieve the same power.

Can you explain to me why?

Because E-85 does not have the same thermal energy of gasoline per weight. Requiring more of it to equal the power of gasoline. Hence E-85s 9.8-1 stoichiometric.



Raising boost raises the air to fuel ratio making you run leaner. You dont know this?

Well, Let me ask you this.. higher octane gas or race gas, why is that you could make more power? I think the concept of running higher octane, boost, and timing goes hand in hand.. hence my suggestion was that higher boost, advance in timing will and could come close to power level of using gasoline with E85. Like I said, I have zero experience using E85 and this is just a speculation.



And yes, I do know raising boost = leaner.. But you do know that E85's higher octane, cooler burn means more play in timing. On contray to some people's belief, power just don't come from just air fuel.

i have to agree!!

okay so in a nut shell we have decided that e85 requires a richer a/f mixture so yea gas mileage will suck even more than it already does with a rotary but the increase octane level will allow for more boost and more advanced timing as herb stated so we can agree that....





Pros: more power, and better for the enviroment



cons: shitty gas mileage, and its not readily available



Am I right? ( or maybe im just too drunk at the moment )

Correct.



The best we can hope for is a variety of percentages (E-45, E-55, E-65) to give more mileage per tank. And still have some benefits of ethanol.