E85 Questions
Safety Car
Joined: Mar 2004
Posts: 4,048
Likes: 1,475
From: South Florida
Melting Slicks
Joined: Oct 2009
Posts: 2,560
Likes: 485
From: Moberly, Mo
Mine made 395/410 on 93 and on E70 with tune it made 434/440. My car now made about 460/480 with long tubes, ported lt1 IM/ported lt1 87mm TB. I haven't had it on the dyno since the Ported Msd and stock 95mm TB but we picked up about a 10th in the 1/4 with the Ported MSD/95mm TB so it obviously picked up a few hp and those were under not so good temps around 80 and DA about 2600. Good air and DA it will run maybe some 10.70 or low 80s at 130 mph. I went out a few weeks ago when temps were in the 50s and DA was under 500 and we couldn't get hold of the track, poor prep and about 150 street cars dragging water up to the starting line. Made 2 aborted passes and loaded up and came home. Waste of time and money so I'll wait till spring and give it another shot again.
Team Owner
Joined: Jul 2004
Posts: 28,379
Likes: 3,262
From: Hartford WI
How close do you think and how are the injectors? Just trying to sum up the project so I don't end up screwing myself over by saving $100 today and spending $1000 next year because I should have done something at the time.
Last edited by aklim; Nov 20, 2021 at 10:12 AM.
Melting Slicks
Joined: Oct 2009
Posts: 2,560
Likes: 485
From: Moberly, Mo
Ninja you are right and I have not issues at all with Full E85 when I can get it. My low side drops into the upper 40s going thru the traps and my high side which is turned up a little stays right about 2500 psi. I log every pass just to make we never have an issue of running the rails dry. Ninja you know as a tuner that AFR on these motors is crucial to keeping the motor living and making the most power so we are right at about 12.9 to 13.0 on E so I love this stuff. My injector pulse width is about 4.8 to 5.2 which is pretty much right one point.
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Thread Starter
Race Director
Joined: Jul 2015
Posts: 15,987
Likes: 2,667
From: Frisco, TX
Stopped by the shop and Matt already knew what questions I was going to ask, said he saw this thread
Car goes in on 11/31 for the sensor, dyno tune (price he quoted reflects that the car has already been tuned), and oil change. I will post up the results
Car goes in on 11/31 for the sensor, dyno tune (price he quoted reflects that the car has already been tuned), and oil change. I will post up the results
Melting Slicks
Joined: Oct 2009
Posts: 2,560
Likes: 485
From: Moberly, Mo
Safety Car
Joined: Mar 2004
Posts: 4,048
Likes: 1,475
From: South Florida
You can run intake and headers and flex fuel on the LT1s and run full pump E(E70-E75) without a problem. When you go true E85 or E90 it is a bit too much for my liking on the LT1 stock fuel system. So as I said, it is close, but you're good with the proper calibration.
Add a JMS booster and things will be even better.
Team Owner
Joined: Jul 2004
Posts: 28,379
Likes: 3,262
From: Hartford WI
You can run intake and headers and flex fuel on the LT1s and run full pump E(E70-E75) without a problem. When you go true E85 or E90 it is a bit too much for my liking on the LT1 stock fuel system. So as I said, it is close, but you're good with the proper calibration.
Add a JMS booster and things will be even better.
Add a JMS booster and things will be even better.
Melting Slicks
Joined: Oct 2009
Posts: 2,560
Likes: 485
From: Moberly, Mo
You can run intake and headers and flex fuel on the LT1s and run full pump E(E70-E75) without a problem. When you go true E85 or E90 it is a bit too much for my liking on the LT1 stock fuel system. So as I said, it is close, but you're good with the proper calibration.
Add a JMS booster and things will be even better.
Add a JMS booster and things will be even better.
Safety Car
Joined: Mar 2004
Posts: 4,048
Likes: 1,475
From: South Florida
For now, I would run just the sensor and a tune. Maybe later, I will change things out more but do you see any insufficiencies with just the sensor and a dyno tune? Without the booster, would I lose anything with a stock LT1 and the sensor and a dyno tune? Do you see any danger? Any gains if I use the booster?
Mine does drop a little more on the low side when I get close to E85, I've not seen a power gain really beyond E65 on the dyno or at the track. I have dozens of logs on this set up and stock internals it just doesn't matter above E65 as it might with more internal mods.
Exactly this. E65 is really plenty on the street. The only thing I hate about E60-E65 is that you have to blend the pump e85 here with 93 because we have pretty much E80 at all of our pumps year round. I typically run ~E60 on my daily Z06. I've seen no gains in 60-130 draggy above E60.
Melting Slicks
Joined: Oct 2009
Posts: 2,560
Likes: 485
From: Moberly, Mo
no issues
Exactly this. E65 is really plenty on the street. The only thing I hate about E60-E65 is that you have to blend the pump e85 here with 93 because we have pretty much E80 at all of our pumps year round. I typically run ~E60 on my daily Z06. I've seen no gains in 60-130 draggy above E60.
Exactly this. E65 is really plenty on the street. The only thing I hate about E60-E65 is that you have to blend the pump e85 here with 93 because we have pretty much E80 at all of our pumps year round. I typically run ~E60 on my daily Z06. I've seen no gains in 60-130 draggy above E60.
Thread Starter
Race Director
Joined: Jul 2015
Posts: 15,987
Likes: 2,667
From: Frisco, TX
e85 is about 85% ethanol, it is out there but most are blends. the tuner said that above E60 there isnt really any more power to be made
E85 (or flex fuel) is a term that refers to high-level ethanol-gasoline blends containing 51% to 83% ethanol, depending on geography and season
Team Owner
Joined: Jul 2004
Posts: 28,379
Likes: 3,262
From: Hartford WI