May 26, 2016, 04:18 PM
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How to run your LS1 on E85
My car is originally a flex fuel car, do I need to do anything different than the steps required to switch on a normal car? My car has heads, cam, stall ect. so I'm assuming the tune has been changed enough that I can't just put the E85 in it.
thanks
thanks
Last edited by swoop; Jul 14, 2012 at 10:38 PM.
Don't know what changes where made to your fueling and tune to accomodate the mods. Are the injectors the same ones? Flex fuel vehicles have bigger injectors because for the same HP you will need ~30-35% more fuel volume on E85 so the same injectors would support more HP on gasoline but if you want to run E85 then you still need 30-35% more volume over gas for the HP being produced.
The LTFT will tend to tell you how far off the tune is from stoich and the IDC will tell you how much injector capacity you have for the volume required. The AFR needs to be adjusted for the fuel mixture being used however a flex fuel vehicle has the ability to know the amount of ethanol in the fuel. I don't have FFV so I am not sure how they behave, I adjust the afr's in mine to comply with the fueling required.
The LTFT will tend to tell you how far off the tune is from stoich and the IDC will tell you how much injector capacity you have for the volume required. The AFR needs to be adjusted for the fuel mixture being used however a flex fuel vehicle has the ability to know the amount of ethanol in the fuel. I don't have FFV so I am not sure how they behave, I adjust the afr's in mine to comply with the fueling required.
Thanks for the info, I'm not sure what all is done to it yet. I just bought it a couple of weeks ago. I just bought HPtuners and have a E85 staion in town so it's something I'm going to look into.
Are you 100% positive on this? I was told that my Acell 44lb/hr injectors will not support e85 with my stock fuel pump on my heads/cam 02 WS6. I want to run e85, but was told by a bunch of people on here the injectors won't support it. I know they are rated at 44lb/hr, but on my application, they are actually a lot higher than that. Help me out here brother.
TECH Apprentice
iTrader: (2)
Joined: Sep 2007
Posts: 302
Likes: 0
From: Arlington, TX/ Ft. lewis, WA
this, is one of the most helpful threads i've read on here. have been trying to drudge up as much info on builing a turbo E85 setup, but have been trying to weigh the bennifits vs. disadvantages and this was very helpful. +1 for this!!
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On The Tree
Joined: Apr 2005
Posts: 140
Likes: 1
From: Michigan
Indeed!
I have a D1-SC Procharger with a forged 383 running 60lbs injectors and an upgraded fuel pump. Injectors are at 85% capacity and I am running only 8psi.
My tuner tells me I need approximately 30% more fuel injector and pump capacity to equal the same power as I do with pump gas. (560whp)
Do I really need to change anything? I was under the impression I could just tune and move on.
I have a D1-SC Procharger with a forged 383 running 60lbs injectors and an upgraded fuel pump. Injectors are at 85% capacity and I am running only 8psi.
My tuner tells me I need approximately 30% more fuel injector and pump capacity to equal the same power as I do with pump gas. (560whp)
Do I really need to change anything? I was under the impression I could just tune and move on.
TECH Regular
Joined: Jan 2007
Posts: 411
Likes: 1
From: Louisville KY
Your tuner is just a little bit off his numbers. Even if his math is correct e85 makes more power than gas. It's more like 20%
i made 580/660 with the same injectors/inadequate fuel pressure and pushing against 12-15 psi on a stock ls2 GTO.
You'll be fine at <600 if u have good fuel pressure.
i made 580/660 with the same injectors/inadequate fuel pressure and pushing against 12-15 psi on a stock ls2 GTO.
You'll be fine at <600 if u have good fuel pressure.
Just watch your fuel pressure and DC.
Good tuners will always push you to be safe, they don't want you blaming them.
For sure if you keep the above in check all is good. I suspect you will need to make some changes to keep her safe and reliable.
Good tuners will always push you to be safe, they don't want you blaming them.
For sure if you keep the above in check all is good. I suspect you will need to make some changes to keep her safe and reliable.
Teching In
Joined: Aug 2014
Posts: 1
Likes: 0
Your tuner is just a little bit off his numbers. Even if his math is correct e85 makes more power than gas. It's more like 20%
i made 580/660 with the same injectors/inadequate fuel pressure and pushing against 12-15 psi on a stock ls2 GTO.
You'll be fine at <600 if u have good fuel pressure.
i made 580/660 with the same injectors/inadequate fuel pressure and pushing against 12-15 psi on a stock ls2 GTO.
You'll be fine at <600 if u have good fuel pressure.
TECH Regular
Joined: Jan 2007
Posts: 411
Likes: 1
From: Louisville KY
Eric's E-85 2005 GTO tune files E-40 ECM Here are a few. If your auto check the trans tune. You might want to keep yours. All but 1 are for the 4L80 swap.
I could only find 1 that was 1 bar, MAF, OEM injectors. Al the others are 2 bar SD, 60#Deka. All are E-85. These are for use with the stock cam. Do a compare with your OEM and make sure there isn't something I forgot. Like injector size or 2 bar SD.
These are NOT actually zipped. I had to rename the damn file because they were too big. Rename them to .hpt
I could only find 1 that was 1 bar, MAF, OEM injectors. Al the others are 2 bar SD, 60#Deka. All are E-85. These are for use with the stock cam. Do a compare with your OEM and make sure there isn't something I forgot. Like injector size or 2 bar SD.
These are NOT actually zipped. I had to rename the damn file because they were too big. Rename them to .hpt
Last edited by ericwilloughby; Sep 7, 2014 at 05:20 PM.
