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Thread: Hellcat flex fuel tuning

  1. #1
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    Hellcat flex fuel tuning

    Where do I start for tuning for flex fuel? 2020 hellcat.
    I read about a patch that?s needed but not sure exactly what that is or how to get that.
    I assume that?s the first step, getting the patch?

  2. #2
    Senior Tuner Ben Charles's Avatar
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    I’ve done several of these!! A lot of things need to be changed! Let me know if I can help

    Email Tunes, [email protected]
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  3. #3
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    Well, help is what I?m looking for haha

  4. #4
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    I didnt think we could run e-85 without upgrading the injectors...for the reason e-85 runs 30 to40% more fuel?

  5. #5
    Senior Tuner Ben Charles's Avatar
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    With the custom OS (hp tuners leaves most of the tables blank for the user to define and edit) you can run 50% alcohol on stock Hellcat and make quite a bit more power!

    If properly setup the alcohol changes correctly and adds timing as well based on alcohol!

    Email Tunes, [email protected]
    96 TA Blown/Stroked, 4L80E/Fab 9
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    14 Gen 5 Viper
    Custom Mid Engine chassis, AKA GalBen C

  6. #6
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    ok sounds interesting I have access too e-85 in my area....but I'm running 2.85 upper and also meth. injection but I'm not tune for meth. and dont plan too.But that would be where I would be hesitant running e-85 which already higher octane and meth. does kinda the same.

  7. #7
    Senior Tuner Ben Charles's Avatar
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    I’ve ran meth/e85 together in hundreds of vehicles, very doable and basically impossible to detonate under both

    Email Tunes, [email protected]
    96 TA Blown/Stroked, 4L80E/Fab 9
    15 C7 A8 H/C 2.3 Blower/PI
    14 Gen 5 Viper
    Custom Mid Engine chassis, AKA GalBen C

  8. #8
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    Quote Originally Posted by robertrooker View Post
    I didnt think we could run e-85 without upgrading the injectors...for the reason e-85 runs 30 to40% more fuel?
    Ive already upgraded injectors. Next is fuel pumps

  9. #9
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    Quote Originally Posted by Ben Charles View Post
    I’ve done several of these!! A lot of things need to be changed! Let me know if I can help
    Ben can you confirm if any of the cars you have done are 21's? I can find lots of success stories about '15-'20's hellcats but nothing specific to '21's or newer. I am specifically interested in the TRX as we have NOT been successful in getting this working on my '21 TRX.
    Last edited by Bronson90; 01-20-2022 at 02:05 PM. Reason: spelling

  10. #10
    Senior Tuner Ben Charles's Avatar
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    Quote Originally Posted by Bronson90 View Post
    Ben can you confirm if any of the cars you have done are 21's? I can find lots of success stories about '15-'20's hellcats but nothing specific to '21's or newer. I am specifically interested in the TRX as we have NOT been successful in getting this working on my '21 TRX.
    Have not tried a 21 so not able to comment on that

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    96 TA Blown/Stroked, 4L80E/Fab 9
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  11. #11
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    ethanol runs 9 to 1 stoichiometric mixture cause ethanol has 1 oxygen atom

    gasoline is 14.6 to1 but with 10% ethanol added it's actually 14 to 1 and the most power is usually made at 12.6 to 1

    and that's also why ethanol gets lower fuel economy

  12. #12
    Senior Tuner Ben Charles's Avatar
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    Vapor e85 is actually closer to 9.8

    Email Tunes, [email protected]
    96 TA Blown/Stroked, 4L80E/Fab 9
    15 C7 A8 H/C 2.3 Blower/PI
    14 Gen 5 Viper
    Custom Mid Engine chassis, AKA GalBen C

  13. #13
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    What is this AFR you speak of?

    Get with the cool kids and go Lambda.

  14. #14
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    Agreed. I'm jealous my buddies in car gauge will display lambda. Mine just shows AFR