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Thread: Need a tune - 2017 Supercharged LT4 Swap

  1. #1
    Potential Tuner
    Join Date
    Sep 2024
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    Idaho
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    Need a tune - 2017 Supercharged LT4 Swap

    Need a tune:
    2017 Supercharged LT4/10L90 Swap!
    Anyone have a file they will share to help my layman Gen 5 tuner? I paid for the credits and don't want to have to again if I don't have to. He's been getting inconsistent remote help but no one has figured out our issue yet.

    Specifics:
    - LT4 w/stock internals
    - PSI wiring harness w/raw tune

    - Supercharger: *MODIFIED
    * Full Supercharger Rebuild
    * Kong CNC "X Stage" Ported
    * Snout CNC "X Stage" Ported

    - 10L90E: Stock

    - Other Modifications:
    * 95mm LT5 Throttle Body
    * Wegner WAK60 Serpentine System
    * 2.3" Griptec Upper Pulley
    * 15% ATI Balancer & Lower Pulley
    * Walbro 450 in-tank fuel pump
    * Rising rate fuel regulator

    - Remaining issues:
    * Limp mode @ 4000rpm
    * Running rich

    * Cruises just fine, no issues.

    Any help is greatly welcome and appreciated!

  2. #2
    I think you would be better off posting a log and current tune file. Then somebody here might be able to point you in the right direction.

  3. #3
    Tuning Addict
    Join Date
    Jan 2015
    Location
    Franklin, NC / Gainesville, Ga
    Posts
    7,054
    If it's going into reduced engine power you should have a code. There's the old way of tuning a setup like this which unfortunately may be how the harness company has it set up for you and then there's the more correct newer way which involves putting in a lot of background tables for the sciap and supercharger into it and all that stuff that makes a world of difference with how it acts and drives. The Lt5 on its own requires some throttle tables to be changed. Then what os/configuration are you running. Is it an lt4s or something else with tables put into it? Tune file would help with those questions.

  4. #4
    Tuner in Training
    Join Date
    Sep 2020
    Posts
    11
    if you still need help with it post log / tune here or DM i can help

  5. #5
    Potential Tuner
    Join Date
    Sep 2024
    Location
    Idaho
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    4
    Thank you gentlemen for getting back to me so swiftly! I hit up my guy the same day as your first replies, but, unfortunately, for some reason he hasn't sent the file yet. I just now reminded, and lit a bit of a fire under, him so, hopefully, he'll get it to you today. Thanks again for your readiness and willingness to help!

  6. #6
    Potential Tuner
    Join Date
    Sep 2024
    Location
    Idaho
    Posts
    4
    Hi Gentleman, my guy email me the file and I tried forwarding it but the HP Tuners email wouldn't accept it. And since my guy hasn't sent it yet, is there another way I can get it to you to look at? Let me know and thanks again!

  7. #7
    Potential Tuner
    Join Date
    Sep 2024
    Location
    Idaho
    Posts
    4

    2017 Supercharged LT4 Log File

    The latest log file is attached!
    Attached Files Attached Files

  8. #8
    Tuning Addict
    Join Date
    Jan 2015
    Location
    Franklin, NC / Gainesville, Ga
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    Might be worth killing btm since it's in a swap. Then you need to post a log with as many torque, throttle, timing, fueling, temperature and so on channels as possible.
    2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
    2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80

    ~Greg Huggins~
    Remote Tuning Available at gh[email protected]
    Mobile Tuning Available for North Georgia and WNC