Results 1 to 7 of 7

Thread: Z28 auto swap

Hybrid View

Previous Post Previous Post   Next Post Next Post
  1. #1
    New Member
    Join Date
    Dec 2015
    Posts
    2

    Default

    The wiring is not an issue, and I tune many vehicles a week with efi live. I just need more specifics on what needs to be done as far as programming to get the e38 to recognize that there is now a tcm on the network. Would I need to load in a different os? Or if I just add in the wiring the network will just accept there is a tcm?

  2. #2
    Lifetime Member
    Join Date
    Aug 2010
    Posts
    1,934

    Default

    Quote Originally Posted by 32vape View Post
    ... The wiring is not an issue ...
    As long as the rewiring was meticulously completed, then things will likely be OK - this is the most critical component of your conversion project. The BCM may still be problematic (i.e. not allowing starting or inhibiting Cruise Control).

    Quote Originally Posted by 32vape View Post
    ... and I tune many vehicles a week with efi live ...
    Nice to hear that you use EFILive frequently - it is a very user friendly tuning software. However, the necessary skill sets for a dyno (airflow) tuner, and a conversion (component compatibility) tuner are very different.

    Quote Originally Posted by 32vape View Post
    ... need more specifics on what needs to be done as far as programming to get the e38 to recognize that there is now a tcm on the network. Would I need to load in a different os? Or if I just add in the wiring the network will just accept there is a tcm ...
    There is a little more to it than that. This is where knowledge of potential conversion issues comes into play. Your 2014 Z28 (LS7) used an E38 ECM with OS 12656198. The same E38 and the same OS was used by both L99 and LS3 Camaros in 2014. The LS3 was mated to a TR6060 manual transmission - just like your LS7. The L99 was mated to the 6L80 automatic transmission - so this tune is the resource that you will need to make things work. For Camaros, 2014 was the first year that the 6L80 and 6L90 TCMs used the same OS - so you are fortunate that this conversion project is a 2014 model.

    Where do you go from here ...

    I would suggest that you follow Joecar's advice from post #2. Obtain an E38 tune from a 2014 Camaro with the L99 engine - then copy over the relevant parameters from your LS7 tune into the L99 tune. This will not be perfect, but it should get you going such that you could then dyno tune the airflow models (MAF & VVE).

    Another option is to swap in the relevant segments from the L99 tune into the LS7 tune - but this is not recommended for most tuners. There are several tables and parameters that would need to be adjusted after the segment swaps - which are not available in any tuning software.

  3. #3
    Lifetime Member minytrker's Avatar
    Join Date
    Jan 2006
    Posts
    1,332

    Default

    Quote Originally Posted by Taz View Post
    As long as the rewiring was meticulously completed, then things will likely be OK - this is the most critical component of your conversion project. The BCM may still be problematic (i.e. not allowing starting or inhibiting Cruise Control).



    Nice to hear that you use EFILive frequently - it is a very user friendly tuning software. However, the necessary skill sets for a dyno (airflow) tuner, and a conversion (component compatibility) tuner are very different.



    There is a little more to it than that. This is where knowledge of potential conversion issues comes into play. Your 2014 Z28 (LS7) used an E38 ECM with OS 12656198. The same E38 and the same OS was used by both L99 and LS3 Camaros in 2014. The LS3 was mated to a TR6060 manual transmission - just like your LS7. The L99 was mated to the 6L80 automatic transmission - so this tune is the resource that you will need to make things work. For Camaros, 2014 was the first year that the 6L80 and 6L90 TCMs used the same OS - so you are fortunate that this conversion project is a 2014 model.

    Where do you go from here ...

    I would suggest that you follow Joecar's advice from post #2. Obtain an E38 tune from a 2014 Camaro with the L99 engine - then copy over the relevant parameters from your LS7 tune into the L99 tune. This will not be perfect, but it should get you going such that you could then dyno tune the airflow models (MAF & VVE).

    Another option is to swap in the relevant segments from the L99 tune into the LS7 tune - but this is not recommended for most tuners. There are several tables and parameters that would need to be adjusted after the segment swaps - which are not available in any tuning software.

    That sentence should be a sticky on every forum about tuning. Tuning swaps is almost an art in itself and the newer the components the harder it gets. I tune a hundred plus swaps a year and this one would definitely rank up there on how hard it would be to make it work like factory. A lot involved in it for sure.

Similar Threads

  1. 99 Z28, to upgrade OS or not?
    By N0DIH in forum Gen III V8 Specific
    Replies: 2
    Last Post: October 16th, 2008, 01:56 PM
  2. Please help me with these codes on my sisters Z28
    By mvvette97 in forum Gen III V8 Specific
    Replies: 3
    Last Post: May 20th, 2008, 03:56 AM
  3. 02 Z28 tune
    By turbo lcc in forum General (Petrol, Gas, Ethanol)
    Replies: 3
    Last Post: October 5th, 2006, 01:54 AM
  4. Shifting issues 99 A4 Z28
    By mzoomora in forum 4speed RWD/FWD Transmission Tuning (incl T42)
    Replies: 26
    Last Post: June 25th, 2006, 12:07 PM
  5. 98 PCM for Z28
    By 87gmc in forum General (Petrol, Gas, Ethanol)
    Replies: 20
    Last Post: February 14th, 2005, 11:20 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •