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Thread: Tuning help for a TIII using MPTune

  1. #121
    boostaholic
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    Re: Tuning help for a TIII using MPTune

    I was thinking that also, I was choosing 45 because it is close to 43.5 and easier to accurately set the values to while looking at the fuel pressure gauge.

  2. #122
    Visit www.boostbutton.com... Turbo Mopar Contributor ShelGame's Avatar
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    Re: Tuning help for a TIII using MPTune

    Try getting those files now..
    https://db.tt/SV7ONZpQ
    Rob Lloyd
    '89 Daytona C/S

    2.5 T1 Auto
    13.24 @ 100.5mph
    NHRA #3728 AF/S

    boostbutton.com
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  3. #123
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    Re: Tuning help for a TIII using MPTune

    Tried to compile my tune and this warning popped up.


    I emailed you the .lst file

  4. #124
    boostaholic
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    Re: Tuning help for a TIII using MPTune

    Do you have any idea what is going on here? Will the car run if I try and flash it with this compiled using the test assembly file? Should I continue using the functional .asm till you get a chance to look at this?

  5. #125
    Supporting Member Turbo Mopar Contributor
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    Re: Tuning help for a TIII using MPTune

    send me the .lst file also. i can probably help
    89 Voyager LE, 2.5T2 - rest in peace
    87 Charger Shelby T2 (2.4 conversion in process)

  6. #126
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    Re: Tuning help for a TIII using MPTune

    Just sent you the file.

  7. #127
    Visit www.boostbutton.com... Turbo Mopar Contributor ShelGame's Avatar
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    Re: Tuning help for a TIII using MPTune

    No, don't use it. It won't work.
    https://db.tt/SV7ONZpQ
    Rob Lloyd
    '89 Daytona C/S

    2.5 T1 Auto
    13.24 @ 100.5mph
    NHRA #3728 AF/S

    boostbutton.com
    tuning wiki

  8. #128
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    Re: Tuning help for a TIII using MPTune

    Threw new plugs in the car yesterday, switched fuel tables and pulled some more timing out of it, set it to as low as 11 degrees advanced, I re-set the fuel pressure to 45psi base, drove the car last night and its close, need to pull a little fuel out of the density factor for full and part and it is about dialed in. 26psi on premium fuel feels pretty good! Car is running much better on part throttle too now, no more going rich, it runs 13.5-14 under low boost. Making progress!

  9. #129
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    Re: Tuning help for a TIII using MPTune

    Any update on getting the staging limiter and dual boost controller working? Thanks

  10. #130
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    Re: Tuning help for a TIII using MPTune

    I am trying to get the premium fuel tune dialed in before I switch fuels, but I can't get rid of the last bit of knock at 25 psi. How much timing is safe to pull? My afr's are right at 11.5, but I am still getting the knock sensor to register too much voltage. What is a safe amount of timing retard? I am currently at 11, is it safe to pull a couple more degrees of timing with out egt's climbing too high. I do not have an EGT gauge so I am trying to be conservative and not melt anything.

  11. #131
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    Re: Tuning help for a TIII using MPTune

    Tune is dialed in now, did a few pulls on the way to work yesterday and today!! The check engine light never came on, so no knock was picked up. Car is pulling great! This tune is for 75 lb hr injectors ad 45 psi base pressure. Boost is set at 25 psi using the factory boost control. Is there anyone interested in getting this tune from me, this is for the SBECII TIII Ecu only?
    I am swapping the injectors for 120 lb/hr ones and starting my E85 tune very soon.

  12. #132
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    Re: Tuning help for a TIII using MPTune

    Swapped my injectors last night and installed my big ones. (1136cc @ 43.5 psi) getting a couple of new issues, still on 93 pump gas:
    Car is idling higher and having issues getting below 1000rpm.
    After coming to a stop and letting the car idle down, when I go to accelerate from the stop, the car nearly stalls, then starts going, afr's go super lean at that point. How would I adjust this?
    After taking off, car runs pretty good on the big injectors.
    All I did was take my dialed in 72lb tune and scale it for the larger injectors, I also updated the battery offset table to values supplied straight from precision (injector Mfg for the ones I'm running). I'm sure the tune needs some fine tuning before switching to e85.

  13. #133
    Visit www.boostbutton.com... Turbo Mopar Contributor ShelGame's Avatar
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    Re: Tuning help for a TIII using MPTune

    Log your PW at idle. I bet its insanely small. Its hard to control injectors at very small PW's.
    https://db.tt/SV7ONZpQ
    Rob Lloyd
    '89 Daytona C/S

    2.5 T1 Auto
    13.24 @ 100.5mph
    NHRA #3728 AF/S

    boostbutton.com
    tuning wiki

  14. #134
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    Re: Tuning help for a TIII using MPTune

    The pulsewidth with the 72's was .24 @ 1000 rpm.
    The 110's are logging .17 @ 1300 rpm.
    What's the stock idle rpm?

  15. #135
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    Re: Tuning help for a TIII using MPTune

    OK, what's the latency at your battery voltage? Close to that?
    https://db.tt/SV7ONZpQ
    Rob Lloyd
    '89 Daytona C/S

    2.5 T1 Auto
    13.24 @ 100.5mph
    NHRA #3728 AF/S

    boostbutton.com
    tuning wiki

  16. #136
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    Re: Tuning help for a TIII using MPTune

    .70ms @ 13.9v

  17. #137
    Visit www.boostbutton.com... Turbo Mopar Contributor ShelGame's Avatar
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    Re: Tuning help for a TIII using MPTune

    So, your commanded PW is less than your latency. That's the problem. Those injectors won't flow a small enough amount of fuel to idle.
    https://db.tt/SV7ONZpQ
    Rob Lloyd
    '89 Daytona C/S

    2.5 T1 Auto
    13.24 @ 100.5mph
    NHRA #3728 AF/S

    boostbutton.com
    tuning wiki

  18. #138
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    Re: Tuning help for a TIII using MPTune

    I got the 72's to idle and the latency was twice the pulsewidth of the idle value.

  19. #139
    Visit www.boostbutton.com... Turbo Mopar Contributor ShelGame's Avatar
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    Re: Tuning help for a TIII using MPTune

    You can probably play around with the latency and maybe get it to work OK. But, I think you'll always be over fuelled at idle.
    https://db.tt/SV7ONZpQ
    Rob Lloyd
    '89 Daytona C/S

    2.5 T1 Auto
    13.24 @ 100.5mph
    NHRA #3728 AF/S

    boostbutton.com
    tuning wiki

  20. #140
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    Re: Tuning help for a TIII using MPTune

    I'll play around with it, I can say the afr at idle is right around 14-15 according to the gauge. Car will most often be on e85 so these should help.

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