Tune for E85
Race Director
Joined: May 2004
Posts: 16,667
Likes: 1,209
From: Raleigh, NC
St. Jude Donor '15
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
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
Last edited by schpenxel; Apr 23, 2017 at 12:37 PM.
Le Mans Master
Joined: Oct 2012
Posts: 8,434
Likes: 411
From: Texas
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.
Race Director
Joined: May 2004
Posts: 16,667
Likes: 1,209
From: Raleigh, NC
St. Jude Donor '15
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.
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.
Last edited by schpenxel; Apr 25, 2017 at 08:22 AM.
Team Owner
Joined: Nov 2007
Posts: 24,035
Likes: 2,342
From: Gilbert AZ
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.
Le Mans Master
Joined: Oct 2012
Posts: 8,434
Likes: 411
From: Texas
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.
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.
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