E85 guys come in...
07-06-2012, 03:36 PM
#22
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Holy crap.... That's insane, and I love it! E85 must be really hard to pre-detonate on. It does seem as though if you run low timing (10ish) on lower boost (10-12) E85 makes less power than 91oct does... well I'm gonna try 18* on 16#s and be a little more aggressive on the IAT table.
07-06-2012, 04:34 PM
#23
Alot of factors come into play. Static Comp, Dynamic Comp, plugs, back pressure, and race weight are just a few of the major ones. Best thing to do is get on a dyno, start off safe and turn it up until it doesn't make anymore power. 99% of the time, e85 will stop making power before it gets into detonation. Specially on a dynojet (no real world load).
07-06-2012, 07:13 PM
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Alot of factors come into play. Static Comp, Dynamic Comp, plugs, back pressure, and race weight are just a few of the major ones. Best thing to do is get on a dyno, start off safe and turn it up until it doesn't make anymore power. 99% of the time, e85 will stop making power before it gets into detonation. Specially on a dynojet (no real world load).
The hot side of his home grown turbo kit has stock truck manifolds, dual 2.5" from there into a single 3" and into the turbo (Magnum BB 76mm with the 64x74mm exhaust housing) and then a 3.5" DP with a cutout.
Hope this helps to get some intput on how much timing you guys could recommend.
07-10-2012, 10:58 PM
#25
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Well he ended up running pretty good on about 15.5 psi and 18* timing!
http://www.youtube.com/watch?nomobile=1&v=2cxaNrKW-HA
http://www.youtube.com/watch?nomobile=1&v=2cxaNrKW-HA
07-11-2012, 12:29 AM
#26
Well he ended up running pretty good on about 15.5 psi and 18* timing!
http://www.youtube.com/watch?nomobile=1&v=2cxaNrKW-HA
http://www.youtube.com/watch?nomobile=1&v=2cxaNrKW-HA
07-11-2012, 08:26 AM
#28
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Just got mine tuned, and not quite done.
Stock bottom end ls1, 47xxx, ls6 cam, Kytp kit with a pt 7675, e85
We are having boost creep problems with the pw46 wastegate, so haven't pulled it to high yet. I live in San Antonio, so with the heat it made 602 rwhp, 570 tq with 12* timing, 12.5 lbs, pulled to 5800.
In a month or so, we will be adding a 50mm wastegate from josh at kytp, and extending the exhaust out the back. The plan is to bring it down to 10lbs, run 14-16*, and pull it to 6200. We think it wil be close to 650 rwhp.
Stock bottom end ls1, 47xxx, ls6 cam, Kytp kit with a pt 7675, e85
We are having boost creep problems with the pw46 wastegate, so haven't pulled it to high yet. I live in San Antonio, so with the heat it made 602 rwhp, 570 tq with 12* timing, 12.5 lbs, pulled to 5800.
In a month or so, we will be adding a 50mm wastegate from josh at kytp, and extending the exhaust out the back. The plan is to bring it down to 10lbs, run 14-16*, and pull it to 6200. We think it wil be close to 650 rwhp.
No intercooler here and no problems. Numbers in my sig were put up with IAT in the 150's. 
07-11-2012, 09:02 PM
#33
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Alot of factors come into play. Static Comp, Dynamic Comp, plugs, back pressure, and race weight are just a few of the major ones. Best thing to do is get on a dyno, start off safe and turn it up until it doesn't make anymore power. 99% of the time, e85 will stop making power before it gets into detonation. Specially on a dynojet (no real world load).
Nail on the head, mine started losing power above 19* without Knock. No reason to keep throwing timing at it if it doesnt produce power. But mines a completly differant beast, 408 at 18 lbs boost. Best way without the dyno is to watch your mph at the track, if u add timing and mph falls your losing hp. Good luck
07-12-2012, 09:32 PM
#36
Nail on the head, mine started losing power above 19* without Knock. No reason to keep throwing timing at it if it doesnt produce power. But mines a completly differant beast, 408 at 18 lbs boost. Best way without the dyno is to watch your mph at the track, if u add timing and mph falls your losing hp. Good luck
