schpenxel

Ethanol evaporating cools down a lot more than gasoline, so I guess you could say "cylinder" air temp would be lower on E85 vs. gasoline. And it's pretty tough to get E85 to knock regardless so IMO IAT doesn't matter as much on E85

I still run meth on mine on top of E85 since it was already on there and helps cool things down even more. Some of the crazy guys on yellowbullet run no intercooler + E85 with insane IAT's and power and their motors survive like that

Basically this:
http://www.modularfords.com/threads/...=1#post1858133

xBoostx

My heads and cam ls3 on e85 runs about 10 degrees hotter on gas.

schpenxel

Same, about 10* cooler on mine w/E85

Suns_PSD

Do the E85 Tunes not pull timing when the intake air temperature goes over 86 degrees like it would on gasoline? Do I get to keep more horsepower on E 85 come summertime? Cause naturally aspirated engines slow down quite a bit on 105 degree days when stuck in traffic.

schpenxel

You won't have to pull any until a whole lot higher than that on E85. I know people running turbo setups on stock LS3's without meth not pulling anything until 140+

NA setup should be fine to leave timing alone at higher IAT's

Obviously depends on the details, it's good fuel but an idiot tuner is still an idiot tuner.

Unreal

Depends on tuner. Hell even on 91 I don't pull timing until 110+. Most tuners adjust those tables no matter what gas is used.

Suns_PSD

I'd be curious what Dave Steck, who tuned my car flexfuel, could tell us about this and more specifically about my car.

I've moved away from utilizing the E85 during the winter because with road temps I just have no traction. But I intend to run it full time now that TX summer is arriving.

schpenxel

I am curious as well