I am ordering new pistons for my Teksid build and am pondering running E-85 in it. It is a stroker motor and has an F-1c feeding it. I was running 20 psi on my old motor on pump nand meth with a 9.2:1 cr. Does anyone have a reccomendation for a CR on E-85? I was thinking in the 10;1 range to give the motor more response and power off boost.
Inputon CR for E-85
- Thread starter TurboFox54
- Start date
I'm building a 10.1cr 5.0 stroker 3.4 whipple and my tuner is telling me 17lbs is max on E85.
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Well that should still make decent power. Is there any benefit to running the Methanol kit still with E-85?
Yes, a meth kit should be good for another 2-5lbs.
What about just switching up to E-98 for the track instead of meth?
Not sure if it would raise the octane enough.
I believe E-98 has a octane rating of 115 vs E-85 which is about 105. I would figure the increase to E-98 would be enough octane increase.:shrug:
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well we dont have any e 98 available here yet and spraying the meth allows me to cool the intake air down. I was seeing 30 to 40 degree iat drop with the meth on the last motor.
Didnt know if you were planning to buy drums, i wouldnt trust the quality of pump E85 with that narrow of a window for that comp and boost. While the intake air temp decrease is nice, i dont think i would recommend using meth and E85. The cooling property of E85 alone is enough without adding methanol, if it gets too cold it may have problems burning all the fuel.
my build is 9.98:1 turbo E85 ill let you know how it goes over the next month or so.
I'm building a 10.5:1 motor for my race car which will run E85/E98 with an 88mm on B heads
Umm...I doubt there is a limit to the boost you can run on e85. If your tuner told you that, he's probably not a very good tuner. If he was worth his salt he would tell you run what you want and I'll tune it accordingly. You can definitely run more than 17psi of boost with e85 and a 3.4. One of the guys on here is running over 20psi with 10:1 with his 2.9 and I expect 800+ to the tires, and he tuned it himself with sniper iirc.
Op, I'd go for 10:1 to be honest. You're running a more efficient blower setup than twin screw folks are, so you have that advantage as well. But you don't have the low end they do either. So I'd go 10:1 for more off boost power. Plus having more off boat power will help you get up in rpm to where you do make boost for even more power. And I wouldn't use meth and eth together. Two different alcohols being burned together doesn't make much sense. The e85 is enough to cool the intake charge. I mean people supplement petrol fuels with a 50/50 mix of meth and water. You're cooling it with 85/15 ethanol, which should cool the charge right before entering the chamber so that's the best place for it to cool.
Op, I'd go for 10:1 to be honest. You're running a more efficient blower setup than twin screw folks are, so you have that advantage as well. But you don't have the low end they do either. So I'd go 10:1 for more off boost power. Plus having more off boat power will help you get up in rpm to where you do make boost for even more power. And I wouldn't use meth and eth together. Two different alcohols being burned together doesn't make much sense. The e85 is enough to cool the intake charge. I mean people supplement petrol fuels with a 50/50 mix of meth and water. You're cooling it with 85/15 ethanol, which should cool the charge right before entering the chamber so that's the best place for it to cool.
Thanks for the responses. I am leaning toward a 10:1 setup to keep the off boost power up. I will prolly take the meth off also as I prefer to keep the setup as simple as possible. The meth does its job but it adds another factor into the tuning and if it fails you are screwed. Ill be ordering pistons from Diamond today, hopefully they have them in stock so I can get the motor together soon.n
Hell yea man! Good luck! I think you'll be very happy with the outcome!
As an added bonus I can offset the cost of the 105 lbs injectors with the sale of the meth kit. :beer: Ill keep everyone posted on the progress and outcome.
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in my stroker i went kellog crank eagle rods and manley flat tops w/ valve relief, 99 cobra heads and i came out to 9.98:1
i would shoot for 10:1 it will make monster power w/ boost and the E85 keeps detonation at bay so why the hell not.. 8.5:1 is a thing of the past!! haha
i would shoot for 10:1 it will make monster power w/ boost and the E85 keeps detonation at bay so why the hell not.. 8.5:1 is a thing of the past!! haha
No, this is incorrect.
I still think youll be fine running upwards of 10:1. Im wishing I had gone more like 11:1 with my new turbo motor(currently at ~10:1).
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