How aggressive with E85
Thread Starter
Le Mans Master
Joined: Jan 2009
Posts: 5,423
Likes: 43
From: Daytona Beach/ Atlanta---- Good Ol' Florida Boy/ Georgia
How aggressive with E85
So the guys over in the road course section are not amused with my compression and boost levels while using e85 and so its sparked an interesting conversation on that side. My question for you guys is how aggressive have you gotten with e85? I am running somewhere around 10.5:1-11:1 for compression and am seeing 16lbs of boost (will go up a few with pulley swap due to belt slip) on ~e80. I also have an alky control system with dual nozzles. IAT2s have gone as high as 135* but it was 100* out. When I do road course it I will be switching the upper 2.175" pulley out for a 2.6" pulley to help tone things down.
I just find it hard to believe that I am at the limits of e85 on this setup when GTR guys are running around with double the boost and no issues.
I just find it hard to believe that I am at the limits of e85 on this setup when GTR guys are running around with double the boost and no issues.
Melting Slicks
Joined: Jul 2008
Posts: 3,002
Likes: 216
From: Houston Texas
2018 Corvette of Year Finalist
2017 C5 of Year Finalist
Some reports indicate that E85 is limited to around 1400rw. I'm not sure if I would want to push it that far unless running spec fuel. Anyway, you aren't at the limit. Just don't get greedy with timing.
You referenced GTRs at 32 psi, but a 6L or 7L V8 at 32 psi is a much different animal than a 3.8L or 4.0L at the same manifold pressure.
You referenced GTRs at 32 psi, but a 6L or 7L V8 at 32 psi is a much different animal than a 3.8L or 4.0L at the same manifold pressure.
Thread Starter
Le Mans Master
Joined: Jan 2009
Posts: 5,423
Likes: 43
From: Daytona Beach/ Atlanta---- Good Ol' Florida Boy/ Georgia
Some reports indicate that E85 is limited to around 1400rw. I'm not sure if I would want to push it that far unless running spec fuel. Anyway, you aren't at the limit. Just don't get greedy with timing.
You referenced GTRs at 32 psi, but a 6L or 7L V8 at 32 psi is a much different animal than a 3.8L or 4.0L at the same manifold pressure.
You referenced GTRs at 32 psi, but a 6L or 7L V8 at 32 psi is a much different animal than a 3.8L or 4.0L at the same manifold pressure.
Agreed. Their cylinder pressure would be doubt ours due to less volume for distribution of manifold pressure. Which goes to show how lazy my car is in comparison.
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Racer
Joined: Jul 2016
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Drifting
Joined: Jun 2009
Posts: 1,730
Likes: 93
From: St. Petersburg Florida
Most high hp cars on "e85" run ftw fuel not from the pump
https://m.facebook.com/FtwRacingFuels/
https://m.facebook.com/FtwRacingFuels/
