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Thread: Improving shifts via the ECM

  1. #141
    Lifetime Member Tre-Cool's Avatar
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    So its a new year. Any further progress with t43 calibrations? I would be extremely happy if I could get the gear pressure stuff in the adaptive learning area like we have in the early models for the 24256125 OS.

    It's a series 2 VE commodore.

  2. #142
    Forum tyhee Site Admin GMPX's Avatar
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    T43 has not been looked at, there has been five other GM controllers we've been working on.


  3. #143
    Junior Member Alexander's Avatar
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    Hello! I try to make changes to these tables on E39, steps 1 and 3 I understand how to count. Please tell me how you calculated steps 2,4,5,6,7. I explained to ask because I'm afraid to make a mistake and go the wrong way. I really important is your answer!

  4. #144
    Lifetime Member wesam's Avatar
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    Any body tried this with the new 8 speed transmissions ?
    Will this still work the same way ?
    EFILive Tuner

  5. #145
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    Quote Originally Posted by Jason S. View Post
    As I have been digging trying to find a definite answer on reducing the amount of torque reduction on the shifts ( I see as much as 40+ degrees on the shifts on the E67/T43 CTS-V), it seems that no one really knows how to adjust it. It was asked on a couple of occasions which of the torque tables apply for a non adjustable cam in the LSA, with no clear response. Just 'the tables mentioned in this thread'. Well no specific tables have been called out. I am assuming that it is ALL of the tables listed under Normal fuel Exhaust CAM 0 Degrees, but haven't seen actual clarification. Also B5156 lists maximum spark retard for knock, torque reduction etc... which CLEARLY isn't an accurate description because my table is set to a maximum of -20 and I am seeing over 40 taken out. Would it be that difficult to list the tables and options SPECIFICALLY related to these changes by their table numbers?

    So, I'm having this very similar issue!
    I'm wondering if anyone has figured out what was causing the issue?

    I posted up in another thread:
    https://forum.efilive.com/showthread...io-vs-RPM-quot

    But I have a 2013 ZL1 doing the EXACT same thing. Just pulling TONS of timing out of the engine and causing some weird issue's when upshifting.

    Anybody have any ideas? Where to look?

    I've tried a couple of the things that were discussed in this thread, but I'm still having the issue.

  6. #146
    Joe (Moderator) joecar's Avatar
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    I'm still mulling over your files in the other thread, but I do welcome any more info any anyone has to share

  7. #147
    Lifetime Member Tre-Cool's Avatar
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    I've sent him an email with a tune from my own car's tcm. It still runs stock TM and shifts great and doesn't have the large timing swing.

    It's a smooth shift on light/part throttle and firm/quick at wot. A lot of the fine tuning comes down to tuning the preset adapts and shift time modifiers.

  8. #148
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    Quote Originally Posted by wesam View Post
    Any body tried this with the new 8 speed transmissions ?
    Will this still work the same way ?
    This.
    02 Z06, 573/530rw N/A 416, 10.21@136.12.

  9. #149
    Lifetime Member Tre-Cool's Avatar
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    So thread dig & mostly aimed at GMPX.

    Has the torque calculation stuff for the trans been added in the V8 software.
    if not, ETA on being able to see it.

    Either way any chance of getting a copy of spreadsheet to play with, since we have been patiently waiting all these years. :-)

    I've looked at my tune with HPT's "virtual torque" map and in typical fashion there shit doesn't work/calculate properly to what i log. lol

  10. #150
    Forum tyhee Site Admin GMPX's Avatar
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    Quote Originally Posted by Tre-Cool View Post
    So thread dig & mostly aimed at GMPX.

    Has the torque calculation stuff for the trans been added in the V8 software.
    No it hasn't.

    Quote Originally Posted by Tre-Cool View Post
    if not, ETA on being able to see it.
    Wasn't even on the 'to do' list

    Quote Originally Posted by Tre-Cool View Post
    Either way any chance of getting a copy of spreadsheet to play with, since we have been patiently waiting all these years. :-)
    I can't find it on my current PC, it'll be on a back up somewhere but I'm not going to go spend hours looking sorry.


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