Anything new to report on E85?
Puerto Rican.
09-16-07, 05:59 PM
#54
Senior Member
You're right Chrispeed! I added 30% more fuel on start cranc and the engine come to alive. On the map everything is different adding 20-60% more fuel on different cels. 60% mostly on hi boost-rpm. The engine is still a little hard to start sometimes but we haven't the time to spend mapping start and idling on the RotoTest today.
Power numbers and so on is on my thread T-78 streetport G-teched.
/Lasse
Power numbers and so on is on my thread T-78 streetport G-teched.
/Lasse
09-18-07, 05:11 PM
#59
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made 424 @ 18psi on stock port motor, and a pt67 this weekend. waiting for some more info on thing such as duty cycle, and such. I'm fairly happy with it, right now it's a nice conservative tune that should let me have fun, and enjoy the car.
09-18-07, 06:15 PM
#60
What are everyone's thoughts on our aluminum manifolds and fuel rails? I know they say its corrosive but will it actually affect these parts? Also I would like to hear more on what pre-mix oil that's being used I know someone said straight castrol. What brand, how would you mix it and at what ratios?
09-18-07, 06:27 PM
#61
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A guy that does a tune of tuning on e85 up around here www.dynotuneusa.com has done a lot of research and doesn't believe it has a lot of the corrosive problems that was anticipated. I bought a synthetic premix, but my tuner didn't seem to think I would need it. Said that the old metering pump was not maxed out, so that should be able to keep up just fine. I may potentially throw some in there for good measure, but he swears that I shouldn't need it.
09-19-07, 12:08 PM
#62
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On the initial startup I added 30% fuel. It started right up and came to a perfect idle. It was little on the rich side at around 12.0 AFR vs 13.0-13.5 AFR it was at previously. After leaning out the mixture it was very noticable that the idle was much smoother and the idle vacume had increased over what it was before on regular fuel. The egt's are also lower at idle.
in other words is the wideband assuming you are running gasoline, therefore it reads around around .8 lambda and displays 12:1, when in reality the AFR for the ethanol at that lambda is more like 7.5:1?
09-19-07, 02:31 PM
#64
09-19-07, 03:50 PM
#65
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right, thats what i was thinking you were doing. It's sort of a relief because im also 100% used to the gas AFR scale, i figured I'd have to convert my (limited)knowledge into lambda if i were to ever mess with alcohol but im glad to see i dont!
09-19-07, 10:17 PM
#69
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i cant wait till you guys get this all figured out... im breaking in my rebuild right now and running e-85 seems pretty nice... but the fact of an entirely new fuel system seems like a pain for me..
but just to make sure i got this all figured out right, heres what i understand so far..
running e-85 needs a ~30% increase in fuel over 91-94 octane gas
meaning youll need some bigger injectors and a more powerful fuel pump.
but what about fuel pressure? is that going to stay at around 40psi (for lightly modded engines)??
and my wideband switches between lambda and.. ummm... brain went dead.
....
but ya, will the lambda reads what for e-85's "sweet spot"?
and out of curiousity, with e-85's cooling properties and higher octane, the safe boost level for say a stock turbo would increase somewhat, like it does with alky inj right?
please correct anything im wrong about, i just want a good understanding before i do anything
but just to make sure i got this all figured out right, heres what i understand so far..
running e-85 needs a ~30% increase in fuel over 91-94 octane gas
meaning youll need some bigger injectors and a more powerful fuel pump.
but what about fuel pressure? is that going to stay at around 40psi (for lightly modded engines)??
and my wideband switches between lambda and.. ummm... brain went dead.
....but ya, will the lambda reads what for e-85's "sweet spot"?
and out of curiousity, with e-85's cooling properties and higher octane, the safe boost level for say a stock turbo would increase somewhat, like it does with alky inj right?
please correct anything im wrong about, i just want a good understanding before i do anything
09-21-07, 01:44 AM
#70
E85 is actually E70 during the winter!!!
October 1 is generally the time that gasoline volatility is changed from a summer to a winter t blend. The Reid Vapor Pressure (RVP) of gasoline is seasonally adjusted to limit problems with summer time vapor lock and to assist with winter cold start.
E85 is also seasonally adjusted for these same reasons. Beginning October 1, the amount of hydrocarbon in your 85% ethanol should be increased from 15% to 30% of the total blend. This final product of E70 (70% ethanol, 15% hydrocarbon), is then sold throughout the winter with an adjustment back to E85 April 1 of each year.
Any retailers with questions should contact the NEVC at: info@E85fuel.com.
---------------------------------
If you're going to do any tuning, It would seem to wait until the "crappier" e85 (or e70) is available. That way you don't have to worry about the fuel year round. Or have a SUMMER map, and a WINTER map.
I wish I had an E11..
E85 is also seasonally adjusted for these same reasons. Beginning October 1, the amount of hydrocarbon in your 85% ethanol should be increased from 15% to 30% of the total blend. This final product of E70 (70% ethanol, 15% hydrocarbon), is then sold throughout the winter with an adjustment back to E85 April 1 of each year.
Any retailers with questions should contact the NEVC at: info@E85fuel.com.
---------------------------------
If you're going to do any tuning, It would seem to wait until the "crappier" e85 (or e70) is available. That way you don't have to worry about the fuel year round. Or have a SUMMER map, and a WINTER map.
I wish I had an E11..
09-21-07, 10:40 AM
#72
Did you ever find out what your duty cycles were. Portland Indiana is just south of me and when the local ethonal plant that just started running is at full production they will be the largest ethonal plant in the world. Local price is 2.40 a gallon now wonder what it will be later...
09-24-07, 02:01 AM
#74
Senior Member
I heard of a Swedish rallycross guy this weekend that in Sweden there will be E100 available spring next year! It shall be sold as a race product in small volumes. I wonder what octane rating it will be? E85 is as i understand 105 octane.
/Lasse
/Lasse
09-24-07, 12:22 PM
#75
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Did you ever find out what your duty cycles were. Portland Indiana is just south of me and when the local ethonal plant that just started running is at full production they will be the largest ethonal plant in the world. Local price is 2.40 a gallon now wonder what it will be later...