E85 Questions
Thread Starter
Race Director
Joined: Jul 2015
Posts: 15,987
Likes: 2,667
From: Frisco, TX
E85 Questions
I have the mod bug biting me, but without breaking the bank by going SC. My current mods are, AFE intake, Soler TB, LG long tube, Borla ATAK. I started reading up on E85, it says that its cleaner, cooler, and obviously adds power and torque (average 40hp/50 tq from what I can find here). For those that have did this, can you give me the pros and cons of it that you experienced, I planned on talking to the shop about the conversion next time I go in for an oil change
Le Mans Master
Joined: Apr 2001
Posts: 5,471
Likes: 717
From: Black Forest CO
I run E85 (actual E66 out of the pump) in my 17 ZL1, 19 Z06, and 18 Tahoe (6.2 engine). I have not experienced any problems or drawbacks in any of these other than a decrease in fuel mileage of about 16%.
Safety Car
Joined: Nov 2011
Posts: 3,714
Likes: 343
From: Norman OK
So what you are saying is you dont run e85 and dont really know much about it?
On a modern N/A engine you will see around 20-30 gains at the wheels running E85, as said depending on the pumps in your area winter time E85 blends are in the E50-E75 range, summer time blends can be E65-E80. Forced Induction vehicles can see nice gains, in the 50-100 HP at the wheels depending on the application.
Last edited by TJay74; Nov 11, 2021 at 11:56 AM.
Drifting
Joined: Sep 2016
Posts: 1,581
Likes: 865
So what you are saying is you dont run e85 and dont really know much about it?
On a modern N/A engine you will see around 20-30 gains at the wheels running E85, as said depending on the pumps in your area sinter time E85 blends are in the E65-E75 range, summer time blends can be E65-E80. Forced Induction vehicles can see nice gains, in the 50-100 HP at the wheels depending on the application.
On a modern N/A engine you will see around 20-30 gains at the wheels running E85, as said depending on the pumps in your area sinter time E85 blends are in the E65-E75 range, summer time blends can be E65-E80. Forced Induction vehicles can see nice gains, in the 50-100 HP at the wheels depending on the application.
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Safety Car
Joined: Mar 2004
Posts: 4,048
Likes: 1,475
From: South Florida
E85 is a great mod for LT1's and LT4's. As mentioned you can expect at least 20-30rwhp on an LT1 with your mods. Just make sure your tuner knows how to verify your fuel system can keep up on E85. With your mods you will be on the edge of capacity on Pump E if it is high content (E75+) like it is in my area.
Melting Slicks
Joined: Oct 2009
Posts: 2,560
Likes: 485
From: Moberly, Mo
My first and easiest mod. Gained over 30 rwhp and my best with E85 (E65) was 11.58@120 and thats almost 1/2 second faster then my stock 12.06@116 on 93 octane. Plus it smells good, loving me some corn and with the combination of just a few other mods we've went 10.91@128, best et 10.90.
Safety Car
Joined: Nov 2011
Posts: 3,714
Likes: 343
From: Norman OK
You need the flex fuel sensor kit and someone to tune the ECM and or TCM for the changes (all of the changes are in the ECM, tune the TCM as well if you want even more improvement.). The ECM is able to "Flex" back and forth from gasoline to E85 in any ratio needed seamlessly. That is the beauty of the GM Flex Fuel system.
Melting Slicks
Joined: Oct 2009
Posts: 2,560
Likes: 485
From: Moberly, Mo
You need the flex fuel sensor kit and someone to tune the ECM and or TCM for the changes (all of the changes are in the ECM, tune the TCM as well if you want even more improvement.). The ECM is able to "Flex" back and forth from gasoline to E85 in any ratio needed seamlessly. That is the beauty of the GM Flex Fuel system.
Melting Slicks
Joined: Oct 2009
Posts: 2,560
Likes: 485
From: Moberly, Mo
Mine was 350.00 for the dsx and 200.00 for the install and since I had my own Hp Tuners that I brought with me and had credits the tuner just used my lap top and credits and charged me 275.00 for tuning including dyno and since he'd done a lot of E85 Camaro and C7 tunes in took him about an hour or so. I was happy with that since the total was just a tad over 800.00. I was happy with that for a 1/2 second and 4 mph in the 1/4 mile times.
Burning Brakes
Joined: Aug 2001
Posts: 837
Likes: 388
From: Olathe KS
If they haven't tuned the car before it's usually around $650 - $800 for a flexfuel tune around here. You should have them tune it on 93 and then move to E85 imho but talk to your tuner about that. The sensor is $300 and maybe an hour of labor to install so $500 installed plus the tune. It's the best bang for the buck mod out there though!
Safety Car
Joined: Mar 2004
Posts: 4,048
Likes: 1,475
From: South Florida
If you own your own HPTuners license and laptop I do remote tunes for E85(well not just E85). The most economical way is to buy the sensor and install it yourself. There is plenty of info and youtube videos on it. Then pay a remote tuner to tune for you. If you don't own HPTuners and don't have the ability to install the sensor yourself, then the best bet is to find a shop local to you to do it all.