May 26, 2016, 04:18 PM
Last edit by: IB Advertising
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How to run your LS1 on E85
I too am OLSD. So other than stoich and spark, the tune was left alone as far as switching to E85?
That was done, Spark was raised globally as well as idle spark.
Idle spark is sitting somewhere around 26-28 and pretty solid.
I can't speak for what your trims will do when switching.
I'm currently OLSD so there aren't any real adjustments that get made by my comp when I switched. I was still in the process of getting the 42# injectors in line so what my VE looked like before wasn't really indicative of what it is now.
I prob won't ever get a chance to get it dyno tuned to make the most effective spark changes either, which stinks.
Idle spark is sitting somewhere around 26-28 and pretty solid.
I can't speak for what your trims will do when switching.
I'm currently OLSD so there aren't any real adjustments that get made by my comp when I switched. I was still in the process of getting the 42# injectors in line so what my VE looked like before wasn't really indicative of what it is now.
I prob won't ever get a chance to get it dyno tuned to make the most effective spark changes either, which stinks.
To better answer the question, if you switch those two things and expect that your VE will need tweaking, yes that's all that was done.
Keep in mind tho, I am just some schmuck that read a couple internet threads and applied that info. I'm still just learning like most people here.
Well 1 year later and only a conversion to E85 gave me +13 hp and +16 lb/ft Torque.
Last year graph 92 octane and poor tune....
This year graph, E85 and better tune..
Sorry to leave the results a little ambiguous since the original tune was questionable, and honestly the current tune could be questionable as well since I'm no tuning pro
(although I did get some good advice) still,..you can't deny there's a gain to be had from this fuel.
Mods in sig, still stock compression, basically small cam and bolt-ons.
~T
Last year graph 92 octane and poor tune....
This year graph, E85 and better tune..
Sorry to leave the results a little ambiguous since the original tune was questionable, and honestly the current tune could be questionable as well since I'm no tuning pro
(although I did get some good advice) still,..you can't deny there's a gain to be had from this fuel.
Mods in sig, still stock compression, basically small cam and bolt-ons.
~T
Teching In
Joined: Jun 2008
Posts: 31
Likes: 0
Does anyone know how much I could boost compression naturally aspirated?
If a stock LS7 (for example) runs 11:1 with 91-93 octane what compression could someone theorectically run with a engine dedicated to running soley E85 100% of the time?
If a stock LS7 (for example) runs 11:1 with 91-93 octane what compression could someone theorectically run with a engine dedicated to running soley E85 100% of the time?
I'm setting up my new motor at 13:1 with boost. I read one guy is running 15:1 N/A. There is an SAE paper where they modified a diesel motor for E-85, and I believe they ran it at 20:1.
Teching In
Joined: Jun 2008
Posts: 31
Likes: 0
It is too bad E85 isn't more readily available in all 50 states because with the compression increased to compensate for the octane I bet some of the fuel efficiency would come back compared to straight gasoline vs E85 at normal compression ratios.
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Staging Lane
Joined: Jan 2004
Posts: 93
Likes: 0
From: CT/AL
ahhh man I can't wait to do this. I ran some quick numbers and the E85 in Colorado was about 15 cents cheaper per energy content per gallon than gasoline (that was assuming it had 70% of the energy content per gallon, i think that's close?) Thanks for the write up!
I found them. They came from the first link.
https://ls1tech.com/forums/showthrea...=602091&page=3
http://www.epa.gov/otaq/presentation...-isaf-no55.pdf
http://www.epa.gov/otaq/presentation...mjb-051303.pdf
https://ls1tech.com/forums/showthrea...=602091&page=3
http://www.epa.gov/otaq/presentation...-isaf-no55.pdf
http://www.epa.gov/otaq/presentation...mjb-051303.pdf
Put E85 in over the weekend and got about 185miles on it so far. I am impressed with the results so far. Seems to get into boost faster, car sounds different and I noticed in a given gear and rpm I'm the motor has less load on it. My injectors are maxed out bad at 149% at full boost, looking for bigger injectors now. I currently have 42lb injectors from 04 Cobra. Using gas I was at 95 % inj duty cycle under full boost (8lbs). So far I don't think I'm going back to regular gas.
p.s. I did tune my set up with Hptuners with the parameters suggested by RUNN.
p.s. I did tune my set up with Hptuners with the parameters suggested by RUNN.