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Thread: Any experience w/ "Injector gain vs cyl" ECM 12313

  1. #1
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    Any experience w/ "Injector gain vs cyl" ECM 12313

    In the bottom it says may causes issues with high rpm operation???
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    Factory Stock 97 SS M6 13.51 @ 104.3 mph
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    32psi and still winding out 5th on the highway somewhere

  2. #2
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    i have adjusted my injector gain and it was fine with light driving then with a throttle stomp it just lost all power for a sec then regained so i change it back to stock and problem gone, i may try it again and sneak it in with small steps and see how it goes encase it was too much at one time

  3. #3
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    I use it all the time on large boosted Eaton based superchargers. Haven't had any problems as long as you don't modify the driver demand tables. The ecm can't handle both modifications at the same time.
    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]
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  4. #4
    Does this function provide the ability to modify the fueling on individual injectors ?

  5. #5
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    Yes, just go with small adjustments at a time while reading the plugs. If you have any leaner cylinders you might be surprised by what you can gain doing this.
    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

  6. #6
    Yes, just go with small adjustments at a time while reading the plugs. If you have any leaner cylinders you might be surprised by what you can gain doing this.
    Good advice, this will help with the rear cylinders on LSA's

    Is there a reference or picture for which injectors is which with the labelling ??
    Last edited by IXR08; 07-13-2017 at 06:41 PM.

  7. #7
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    Forgot the table name, but look up at the top of the page. Should help you out there. I can post cylinders later if need be.
    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

  8. #8
    Yeah that's what I meant Cylinder A = 1 etc??

    A1, B8, C7, D2, E6, F5, G4, H3
    Last edited by IXR08; 07-13-2017 at 07:11 PM.

  9. #9
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    This Might help or at least get somewhat close on a Eaton

    Cyl #A 1.01
    Cyl #B 1.095
    Cyl #C 1.055
    Cyl #D 1.04
    Cyl #E 1.095
    Cyl #F 1.045
    Cyl #G 1.06
    Cyl #H 1
    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

  10. #10
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    Quote Originally Posted by GHuggins View Post
    I use it all the time on large boosted Eaton based superchargers. Haven't had any problems as long as you don't modify the driver demand tables. The ecm can't handle both modifications at the same time.
    driver demand tables..? is that like VE table at some time

  11. #11
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    Sorry - gen 4 - desired throttle area tables - don't modify those and this both - will always put into REP and set ECM memory and logic faults...
    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

  12. #12
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    Quote Originally Posted by GHuggins View Post
    Sorry - gen 4 - desired throttle area tables - don't modify those and this both - will always put into REP and set ECM memory and logic faults...
    ok yea thinking back i may have been making small changes to some of those at same time, the cyl gain table is one i was wanting to change too so now ill have another go

  13. #13
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    i was using this just to help simplify which cylinder is what


  14. #14
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    Quote Originally Posted by GHuggins View Post
    This Might help or at least get somewhat close on a Eaton

    Cyl #A 1.01
    Cyl #B 1.095
    Cyl #C 1.055
    Cyl #D 1.04
    Cyl #E 1.095
    Cyl #F 1.045
    Cyl #G 1.06
    Cyl #H 1
    like 2600+ eatons, or all of them?
    The most hated, make the most power.
    93 Ranger. 5.3 D1X. 1069hp.

  15. #15
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    2300+ 1900's with 15+psi, but won't need that radical of adjustments / The above tables are from a 2300 heartbeat running 18psi
    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

  16. #16
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    Quote Originally Posted by GHuggins View Post
    2300+ 1900's with 15+psi, but won't need that radical of adjustments / The above tables are from a 2300 heartbeat running 18psi
    Ah, gotcha. say you have one at 16 psi. I need to find a faster way to pull plugs on the LSA. such a pain in the butt.
    The most hated, make the most power.
    93 Ranger. 5.3 D1X. 1069hp.

  17. #17
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    Yes - big pain - I like to do 3 or 4 wot dyno pulls before even bothering to pull the plugs too - makes it easier to read them or instantly see fueling adjustments... Then maybe not tighten so tight until ready to call it good
    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

  18. #18
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    I played with this table a couple years ago, trying to balance out a bank to bank imbalance I see at lower rpm. It seemed to help under 2000 rpm, but holy crap......WOT and fueling went bonkers. AFR was all over the place. I got skeered and put the table back to stock values, never messed with it again. This was an N/A application, so maybe it works better for boost?? Either that or I did something stupid and did not realize it at the time. Regardless, I would not mess with injector gain unless you have the WB installed and can verify WOT AFR.
    When arguing with an idiot, make sure he isn't doing the same thing....

  19. #19
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    Quote Originally Posted by Michael_D View Post
    I played with this table a couple years ago, trying to balance out a bank to bank imbalance I see at lower rpm. It seemed to help under 2000 rpm, but holy crap......WOT and fueling went bonkers. AFR was all over the place. I got skeered and put the table back to stock values, never messed with it again. This was an N/A application, so maybe it works better for boost?? Either that or I did something stupid and did not realize it at the time. Regardless, I would not mess with injector gain unless you have the WB installed and can verify WOT AFR.
    Tq Model is another set of tables that won't play well with this - Do not modify individual tables in the tq model and this table - have seen it lean out bank 2 if just modifying the airmass tables / BUT if you modify the tq model via tq editor - all seems to work good... That part applies to more tables then just this one though...

    Also don't recommend adjusting this for bank to bank fueling - only adjust for wot cylinder to cylinder lean issues... Might be why wot fueling went screwy for you Michael?
    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

  20. #20
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    I dunno....

    Never thought to use it for WOT tuning of individual cylinders. How would you know which one is lean without an O2 sensor or EGT probe on every primary tube?
    When arguing with an idiot, make sure he isn't doing the same thing....