E85 Review: Wicked Gets Gets Corn Fed
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From: West Carrollton (Dayton), OH
No ****. E85 stoich is 9.7, but got a question for ya. Do you know how a wideband sensor works?? The wideband reads lambda, the digital readout is a representation of what the Lambda equates to stoich for gasoline. If E85 9.7 = 1.00 lambda, and gasoline 14.7 = 1.00 lambda, so what happens when you shoot your maf cal sky high to make the guage read 14.7? Your 14.7 readout is the 1.00 lambda. It's all in the math.
No ****. E85 stoich is 9.7, but got a question for ya. Do you know how a wideband sensor works?? The wideband reads lambda, the digital readout is a representation of what the Lambda equates to stoich for gasoline. If E85 9.7 = 1.00 lambda, and gasoline 14.7 = 1.00 lambda, so what happens when you shoot your maf cal sky high to make the guage read 14.7? Your 14.7 readout is the 1.00 lambda. It's all in the math.
doh!
plus paul yaw gave me some needed inside info on running it properly
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From: West Carrollton (Dayton), OH
Thanks for the help Area
Last edited by WickedSS2005; Oct 20, 2009 at 09:51 PM. Reason: Automerged Doublepost
Be careful when quoting E85 AFRs. You shouldn't be running anywhere near 11.6 AFR on E85. If so you are lean by about 40% or so. You should try reading in lambda instead and getting yourself familiar with that. 11.6 nets you at about .79 lambda, which is a tad lean for E85 at 7.7:1. Try to richen it up closer to .76 or so (7.3:1) and I bet she makes some more power. E85 is not like gasoline in that aspect. Richer will actually produce more power. The only down side is the richer you go, the more fuel/injector you need. Even the ID 1000cc injectors on my car can barely keep up with that on the returnless system. Just food for thought for the E85 noobs. A return fuel system and the ID 1000cc is a sure fire way to have enough fuel on E85 and to make sure you aren't idling at 6.8:1 AFR because the injectors misfire below 1.3ms. I think even Area47 switched off from them because of this exact issue.
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From: West Carrollton (Dayton), OH
Thanks for the info SDz. I've been trying to dial it back in, and as of last night, it was 11.4 which is 0.775. Anyone else have issue w/ every other time the car is ran, the idle surges? It is exactly every other time I run the car.
Yeap. I've adjusted my idle timing and idle speed a bit and made it better but the surge is still there. I also have an issue with running out of fuel after 6500 rpm. I will be purchasing ZZP's BRFPS to resolve both issues.
Also, for reference, I've been commanding .77 lambda at wot.
Also, for reference, I've been commanding .77 lambda at wot.
Be careful when quoting E85 AFRs. You shouldn't be running anywhere near 11.6 AFR on E85. If so you are lean by about 40% or so. You should try reading in lambda instead and getting yourself familiar with that. 11.6 nets you at about .79 lambda, which is a tad lean for E85 at 7.7:1. Try to richen it up closer to .76 or so (7.3:1) and I bet she makes some more power. E85 is not like gasoline in that aspect. Richer will actually produce more power. The only down side is the richer you go, the more fuel/injector you need. Even the ID 1000cc injectors on my car can barely keep up with that on the returnless system. Just food for thought for the E85 noobs. A return fuel system and the ID 1000cc is a sure fire way to have enough fuel on E85 and to make sure you aren't idling at 6.8:1 AFR because the injectors misfire below 1.3ms. I think even Area47 switched off from them because of this exact issue.
Have you found out why it was recommended to you to use this as your stoich yet? I'm wondering if you are doing this because you are not tuning based on lambda. Otherwise, what is the advantage one way or the other? It seems to me that if you dial your car in to run lambda -- 1.0, then it really makes no difference what your stoich AFR is.
Somebody please smack me if I'm wrong here.
Somebody please smack me if I'm wrong here.



