How aggressive with E85
07-14-2016, 09:11 AM
#1
Le Mans Master
Thread Starter
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.
07-14-2016, 10:29 AM
#4
Safety Car
You have room to go. I'm at the stock LS3 10.7:1 compression on e85 with minimal timing.
07-14-2016, 10:49 AM
#6
Melting Slicks
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.
07-14-2016, 11:24 AM
#7
Le Mans Master
Thread Starter
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.
07-14-2016, 11:28 AM
#8
Melting Slicks
The GTRs you see at 2000+ HP are running over 60psi manifold pressure and are on straight methanol.
07-14-2016, 12:39 PM
#9
Race Director
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St. Jude Donor '15
How do you move enough fuel for 2000hp using methanol?
07-14-2016, 12:43 PM
#11
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St. Jude Donor '15
Had a feeling I'd get that answer 
Last edited by schpenxel; 07-14-2016 at 12:45 PM.
07-14-2016, 02:11 PM
#13
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St. Jude Donor '15
I told him he's crazy. He don't care. It hasn't gone boom yet.. E85 ftw
07-14-2016, 02:27 PM
#15
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St. Jude Donor '15
[insert honey badger don't give a **** meme here]
07-14-2016, 02:38 PM
#17
Drifting
Most high hp cars on "e85" run ftw fuel not from the pump
https://m.facebook.com/FtwRacingFuels/
https://m.facebook.com/FtwRacingFuels/
07-14-2016, 02:53 PM
#18
Melting Slicks
I run straight up Kroger E. It's roughly E75-E80 every time. I'm going to keep a drum of E98 in my garage though to top off my blend on race nights though.
07-14-2016, 03:22 PM
#19
Team Owner
My crap box ran 91 for 4+ years. Of 91 can make 1100+ for years then e85 can do it easy.
