Last edit by: IB Advertising
See related guides and technical advice from our community experts:
Browse all: Chevrolet Camaro or Pontiac Firebird Fuel System Guides
- Camaro and Firebird: What You Need to Know About E85 and Race Gas
Important information to help you understand your Camaro or Firebird.
Browse all: Chevrolet Camaro or Pontiac Firebird Fuel System Guides
How to run your LS1 on E85
#321
TECH Enthusiast
iTrader: (8)
Join Date: Feb 2006
Location: Denver Colo.
Posts: 524
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Yea, no doubt.
Im just wondering if anyone has put together to say like.
EFIlive in this example
Table # BXXXX add 23% for more fuel
add 1 to injector flow rate
yadda yadda yadda. Catch my drift?
That will get a person close and atleast be able to put E85 in and get the car running and do some fine tuning.
I have no idea what table/chart to change and by how much.
Im just wondering if anyone has put together to say like.
EFIlive in this example
Table # BXXXX add 23% for more fuel
add 1 to injector flow rate
yadda yadda yadda. Catch my drift?
That will get a person close and atleast be able to put E85 in and get the car running and do some fine tuning.
I have no idea what table/chart to change and by how much.
Just change {B3601} to 9.765. Click Engine Calbration, Fuel, Mixture, Parameters. It's right at the top B3601 Ratio of air to fuel for stoichiometry. That is all you need to change to run E-85. It may not be perfect but will be close enough to prevent any damage. I did this in my stock truck and it ran just fine. I did later on put in the high octan table from my car and got a bit better gas milage and some horse power. But the one change is all you need to get you going.
#322
10 Second Club
iTrader: (3)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Just change {B3601} to 9.765. Click Engine Calbration, Fuel, Mixture, Parameters. It's right at the top B3601 Ratio of air to fuel for stoichiometry. That is all you need to change to run E-85. It may not be perfect but will be close enough to prevent any damage. I did this in my stock truck and it ran just fine. I did later on put in the high octan table from my car and got a bit better gas milage and some horse power. But the one change is all you need to get you going.
Yea, I see that... And understand as well.
But, you are going to need to flow more fuel... So, what chart is that?
#323
TECH Enthusiast
iTrader: (8)
Join Date: Feb 2006
Location: Denver Colo.
Posts: 524
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I'm just tring to save a little gas by running it a bit lean. As for the PE I just use 15% more fuel for PE which is actually 8.3:1. That does equate to max power lean. If I recall correctly the normal PE for our cars is +15% more fuel stock, so you don't have to add more than that. With the nitrous you should be using more fuel anyway so if you use a dry shot your tune is already set up for it, if you use a wet kit you will need to use a bigger fuel jet. I would say a 30% larger jet to start since E-85 uses 30% more fuel.
#325
10 Second Club
iTrader: (3)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I'm just tring to save a little gas by running it a bit lean. As for the PE I just use 15% more fuel for PE which is actually 8.3:1. That does equate to max power lean. If I recall correctly the normal PE for our cars is +15% more fuel stock, so you don't have to add more than that. With the nitrous you should be using more fuel anyway so if you use a dry shot your tune is already set up for it, if you use a wet kit you will need to use a bigger fuel jet. I would say a 30% larger jet to start since E-85 uses 30% more fuel.
So, I guess ill have to use the 100 shot N20 pill and the 200 shot fuel pill.. ???
#327
TECH Enthusiast
iTrader: (8)
Join Date: Feb 2006
Location: Denver Colo.
Posts: 524
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Yes. It will likely be closer to the 8.4 at WOT, but that will depend on your current tune. Just be sure to check with your wideband before you get on it, just to be safe. Good luck, gotta go. Keep us posted on how it goes.
#330
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I have a 95 TA with bolt-on's + heads with 30# SVO's and would also like to try E85 out, not for full time use, but have a tune that I can load when I want to use it. I know that the injector constant should be set to a 30% smaller size so the PCM adds more fuel, correct? (24.37# in tune for 31.68# SVO injectors).
What else would I need to change in TunerCat program to run E85?
What else would I need to change in TunerCat program to run E85?
#333
TECH Enthusiast
iTrader: (8)
Join Date: Feb 2006
Location: Denver Colo.
Posts: 524
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
#334
On The Tree
iTrader: (18)
Join Date: Jun 2006
Location: League City, TX
Posts: 135
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
New to the thread, but read all 17 pages. Anyways, gut tired of spending 4.18 a gallon and I am about to switch to e-85 because I am curently running a 11:4 compression ratio fulley modded GTO. My fuel system consist of a LPE 255lph fuel pump and a set of ford 30lb red tops..... So I almost got it covered.........
Here goes the question, since the ford injectors are rated at 30lbs at 42psi and then on LS engines they end up being around 36lbs at 55 psi.... Is a 36lb injector enough for a modded e-85 setup? Im only seeing about 72% DC @ WOT on the injectors right now and the car is making 456rwhp. I know It would be cutting everything real close considering E-85 needs an additional 30%, thus putting my injectors right against 100% DC. But is this a bad thing? In reality the injectors would really only see 100% DC 2 to 5 times a day and for no longer than 11 seconds at most? I think I just answered my own question, but what do you experienced mid level HP E-85 guys think? Keep 36's or bite off another set and go 42, do you think its safe?
Here goes the question, since the ford injectors are rated at 30lbs at 42psi and then on LS engines they end up being around 36lbs at 55 psi.... Is a 36lb injector enough for a modded e-85 setup? Im only seeing about 72% DC @ WOT on the injectors right now and the car is making 456rwhp. I know It would be cutting everything real close considering E-85 needs an additional 30%, thus putting my injectors right against 100% DC. But is this a bad thing? In reality the injectors would really only see 100% DC 2 to 5 times a day and for no longer than 11 seconds at most? I think I just answered my own question, but what do you experienced mid level HP E-85 guys think? Keep 36's or bite off another set and go 42, do you think its safe?
#335
Staging Lane
Join Date: Mar 2007
Location: Phoenix, AZ
Posts: 64
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I don't have any dyno sheets but estimate my 04' GTO around 400whp on 93 octane. I dropped in a set of 48lb Accel injectors, still stock fuel pump and have been running e85 with no problems.
The car had already been tuned for the heads/cam so I've just been tweaking the tune with a predator. Got the injector slope dialed in tight just need to start taking away some fuel since it's still running rich at WOT, but I've added 3 degrees of timing with no traces of knock. Running NGK copper 5.5s.
The car starts a little harder, sounds a little meaner, and my mileage hasn't been bad at all.
The car had already been tuned for the heads/cam so I've just been tweaking the tune with a predator. Got the injector slope dialed in tight just need to start taking away some fuel since it's still running rich at WOT, but I've added 3 degrees of timing with no traces of knock. Running NGK copper 5.5s.
The car starts a little harder, sounds a little meaner, and my mileage hasn't been bad at all.
#336
On The Tree
iTrader: (10)
Join Date: Jun 2006
Location: Warren,IN
Posts: 100
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
alright guys i'm trying to find a place down by indy that converts cars to e85It was posted in this thread and i've been searching for a while (all 17 pages) and can not find it. someone want to help me out here.
thanks
thanks
#337
Launching!
iTrader: (39)
Join Date: Mar 2005
Location: Michigan
Posts: 252
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
It was me, Post #275 on page 14. He doesn't convert your car to E-85 you have to do that yourself, all he did was tune my car to run on E-85. You have to get the appropriate mods like injectors and high flow fuel pump installed first and he will get it running tip top shape. One thing that I do recommend doing is changing your fuel filter.
#338
Launching!
iTrader: (2)
Join Date: Jan 2007
Location: Los Lunas NM
Posts: 234
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Just change {B3601} to 9.765. Click Engine Calbration, Fuel, Mixture, Parameters. It's right at the top B3601 Ratio of air to fuel for stoichiometry. That is all you need to change to run E-85. It may not be perfect but will be close enough to prevent any damage. I did this in my stock truck and it ran just fine. I did later on put in the high octan table from my car and got a bit better gas milage and some horse power. But the one change is all you need to get you going.
Can you just change the Stoichiometric value and everything changes for you? Or do you have to change all the values manually?
#340
TECH Enthusiast
iTrader: (8)
Join Date: Feb 2006
Location: Denver Colo.
Posts: 524
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I am not 100% sure. I would think it would work. I changed it using EFI LIve then pulled it with HP Tuners. I don't use the HP so I am not familiar with it's layout. But it appears that the only value changed is the Stoich AFR. If you like I can send you the HP file, it's from my truck, and you can look at it. If you use HP you are likely more familiar with it then myself.