E85

Hellasaurus · Jan 25, 2021

Checking the pulse on E85. Anyone out here thinking about setting up their TRX for Flex fuel or straight E85? The E85 setup for the 6.2 Hemi has some issues with needing near constant ECM updates due to weather and elevation but the Flex fuel looks much more promising for a daily driver.

CopBait · Jan 25, 2021

I will look into it once I get about 5k on the clock. I run it on my CTS-V and it works great,.. If gas shoots up to $5 a gallon I might look into it sooner..

Viper1500 · Jan 25, 2021

I have my twin turbo viper on E85 and love it. It smells amazing even with no cats. My viper is on full Motec and that works great. Not sure how any other systems would work.

Hellasaurus · Jan 25, 2021

CopBait said:
I will look into it once I get about 5k on the clock. I run it on my CTS-V and it works great,.. If gas shoots up to $5 a gallon I might look into it sooner..

I’m thinking we should see more than 100 HP gain moving to a flex fuel running E85.

Hellasaurus · Jan 25, 2021

Viper1500 said:
I have my twin turbo viper on E85 and love it. It smells amazing even with no cats. My viper is on full Motec and that works great. Not sure how any other systems would work.

Are your running a sensor to monitor the ratio or are you running straight E85?

Viper1500 · Jan 25, 2021

Hellasaurus said:
Are your running a sensor to monitor the ratio or are you running straight E85?

It has a sensor and can run on 93 octane all the way to E90 which is what I pretty much keep it on.

Distilled DesignWorks · Jan 25, 2021

I plan on running a flex tune on mine sometime in the first year. My hellcat challenger is E85, I buy it by the barrel. $200 for a 55 gal drum of true E85. Ethanol wakes these hellcats up. If your in Colorado I can sell you drums for the same price delivered to your door.

Hellasaurus · Jan 26, 2021

Viper1500 said:
It has a sensor and can run on 93 octane all the way to E90 which is what I pretty much keep it on.

That’s awesome. Do you know which sensor or sensor kit you have?

Hellasaurus · Jan 26, 2021

Distilled DesignWorks said:
I plan on running a flex tune on mine sometime in the first year. My hellcat challenger is E85, I buy it by the barrel. $200 for a 55 gal drum of true E85. Ethanol wakes these hellcats up. If your in Colorado I can sell you drums for the same price delivered to your door.

I live in WI and E85 is everywhere. I don’t have a problem finding it at the pump. I want the flex fuel setup in case I end up somewhere that does not have E85 at the pump. When that happens I will just fill up with 93.

TRX1975 · Jan 26, 2021

What is needed to change this engine to be able to run files fuel?

TRX1975 · Jan 26, 2021

TRX1975 said:
What is needed to change this engine to be able to run files fuel?

Sorry that should be flex fuel...lol spell check needed before you hit send

Viper1500 · Jan 26, 2021

Hellasaurus said:
That’s awesome. Do you know which sensor or sensor kit you have?

It was all done by nth moto out of Minnesota. Not sure what sensor they use but I know its all done with motec which is very good stuff and expensive.

Brad1331 · Jan 26, 2021

TRX1975 said:
What is needed to change this engine to be able to run files fuel?

You would need new injectors, thermostat, and a tune to run E85. I would suggest only doing a full time E85 conversion if you have a very steady supply of E85 in your area AND you get/have a good relationship with a local tuner. Doing a flex fuel conversion won't yield you nearly as much performance increases but it is WAY less of a pain in the ass when the weather changes and you aren't constantly adjusting between running too lean or too rich on a daily driver

TRX1975 · Jan 26, 2021

Brad1331 said:
You would need new injectors, thermostat, and a tune to run E85. I would suggest only doing a full time E85 conversion if you have a very steady supply of E85 in your area AND you get/have a good relationship with a local tuner. Doing a flex fuel conversion won't yield you nearly as much performance increases but it is WAY less of a pain in the ass when the weather changes and you aren't constantly adjusting between running too lean or too rich on a daily driver

Well...that sounds like not cheap to do...but thank you for the information

Hellasaurus · Jan 26, 2021

TRX1975 said:
Sorry that should be flex fuel...lol spell check needed before you hit send

Running flex fuel allow you to run E85. You can. Tune the 6.2 to over 900 HP with E85 without cracking open the engine. Just add bigger injectors to run E85, bigger fuel pump in some cases to support more fuel flow and a tune to support the new fuel setup.

Hellasaurus · Jan 26, 2021

Hellasaurus said:
Running flex fuel allow you to run E85. You can. Tune the 6.2 to over 900 HP with E85 without cracking open the engine. Just add bigger injectors to run E85, bigger fuel pump in some cases to support more fuel flow and a tune to support the new fuel setup.

Most guys are also running upgraded pulleys along with the E85 to hit around 900 HP.

davidmichaelmalloy · Mar 14, 2022

Any suggestions on how to find a competent garage/specialist for this work? I'd also be interested to hear what the total investment cost looks like.

NateTRX · Mar 14, 2022

The few tuners I talked to recommended having 2 separate tunes - e85 and pump gas.

They recommended this because of the latency with the flex fuel sensors.. could cause you to go lean for a fraction of a second, which could lead to BOOM.

AZDinoPwr · Mar 14, 2022

NateTRX said:
The few tuners I talked to recommended having 2 separate tunes - e85 and pump gas.

They recommended this because of the latency with the flex fuel sensors.. could cause you to go lean for a fraction of a second, which could lead to BOOM.

I have never heard any competent tuner say anything like this and physically speaking how would this possibly occur?

The flex fuel sensor is run in a parallel loop on the side of the fuel rail typically. Gas mixes in the tank and the sensor reads pre or post injector based on the application. It’s not like you are going to be pulling e85 gas in the line and then all of sudden get some 93 in the line. There’s no latency issue.

Any good tuner can run a flex tune that covers the entire e% map and is conservative for any given fuel.

E85 is a great power adder for any forced induction vehicle… I picked up 110 rwhp on my V. But with the TRX you are going to need to upgrade the fuel pumps (unless you like to run BAPs) with e85 and more than 14 psi from what I have heard thus far. On the V I ran a return style Fore in-tank triple 455 setup…wonder if anyone out there is working on something similar for the TRX yet?

NateTRX · Mar 14, 2022

AZDinoPwr said:
I have never heard any competent tuner say anything like this and physically speaking how would this possibly occur?

The flex fuel sensor is run in a parallel loop on the side of the fuel rail typically. Gas mixes in the tank and the sensor reads pre or post injector based on the application. It’s not like you are going to be pulling e85 gas in the line and then all of sudden get some 93 in the line. There’s no latency issue.

Any good tuner can run a flex tune that covers the entire e% map and is conservative for any given fuel.

E85 is a great power adder for any forced induction vehicle… I picked up 110 rwhp on my V. But with the TRX you are going to need to upgrade the fuel pumps (unless you like to run BAPs) with e85 and more than 14 psi from what I have heard thus far. On the V I ran a return style Fore in-tank triple 455 setup…wonder if anyone out there is working on something similar for the TRX yet?

They said there isn’t any reliable flex fuel kits for the hellcat platform that they trust.

I was disappointed with hearing that but I’d beater be safe than sorry. If you have any kits to recommended me/us to look into please let me know.