V2 tuning question for autos
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2009-2014 Cadillac CTS-V Performance Mods Discussion, V2 tuning question for autos in Cadillac CTS-V Series Forum - 2009-2014; Does tuning typically include tuning the transmission as well? I've read about improved factory shifting algorithms in the '12 and ...
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    HoleintheheaD's Avatar
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    V2 tuning question for autos

    Does tuning typically include tuning the transmission as well? I've read about improved factory shifting algorithms in the '12 and newer models but if I buy an older model and have it tuned does that make factory settings irrelevant?

    Thanks,
    Jim

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    Gary Wells is online now Cadillac Owners Connoisseur
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    Re: V2 tuning question for autos

    Generally included.

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    V locity's Avatar
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    Re: V2 tuning question for autos

    Yes, a tuned tranny regardless of the year, should outperform factory settings

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    GMX322V S/C's Avatar
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    Re: V2 tuning question for autos

    The TCM operating systems have evolved over the years. Sure, you can make the older trannies shift faster/firmer, but some features, such as pre-staged shifts, aren't "retrofitable" because they simply can't be flashed in and you can't just swap in the newer TCMs because it would cause a module inventory mismatch. Perhaps an EFI Live wizard could write a new OS for the older trannies, but at what cost/benefit..?

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    Re: V2 tuning question for autos

    Are you talking about 90e's?

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    Re: V2 tuning question for autos


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    Re: V2 tuning question for autos

    Wow, yep I do remember that thread, LOL. I guess I'm still just a student on this trans... Does the programming on the 2012s+ change the variables for the oncoming pressures and volumes? What exactly is the differences in the tune?

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    Re: V2 tuning question for autos

    I just finished adding in the 2014 trans stuff for the software, It is available via support@efilive if you ask until the next release is made.


    As for the variables you are asking about. After we set up tunes on a 2009 vs a 2014 transmission, the FEEL, Shift execution speed, and pressures are no better than another year. This is after tuning of course. If you had 2 cars that where exactly the same colors, both black, one a 2009 and one a 2012 and you didn't know what car was what, and you drove them full throttle thru the gears, after tuning would feel the same.

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    GMX322V S/C's Avatar
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    V, perhaps they're fine tuned, but it's my understanding there are many internal control processes and algorithms that the tuning apps simply don't have access to (in the "underlying OS"). Many variables the tuner apps do have access to just give a target for the trans to try to hit, based on its internal algorithms and hydro mechanical abilities...

    Quote Originally Posted by V locity
    Wow, yep I do remember that thread, LOL. I guess I'm still just a student on this trans... Does the programming on the 2012s+ change the variables for the oncoming pressures and volumes? What exactly is the differences in the tune?

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    Re: V2 tuning question for autos

    Gmx322v,

    I have mapped out and watched the changes in the code for my own personal stuff, but, it is VERY insignificant and will cause tuning nightmares if I released it to public as it just doesn't make a "worth while" change that is amazing.

    Example, if I just changed over that section of code, and left the 2009 calibration segment alone except fill in the values for the new tables to match the 2012 that didn't exist and now do, with those values, the difference would be un noticeable. All it is doing is filling behind the piston on the next shift, on an UPSHIFT ONLY. So if you downshift, there is no change. Upshift, we are talking .04 or LESS of a shift execution. Who the heck is going to notice .04... .1 or .4 we would notice.

    As we do notice a change on "Tuned" transmissions because we ARE CHANGING SHIFT SPEEDS. If stock is .5 "half a second" and we move it to .2 we are going to see and feel an improvement.

    But if I take and only change my shift times to say .54 you would never notice I just slowed it down. .04 is 4 hundredths of a second..

    ----------

    However, they did succeed in a marketing thing to sell more new cars..

    ----------

    Also it is possible to run the base code over on the 2010 up, but you have to change the communication section and the gear selector section, and a few other things to make it work and talk correctly again.

    It is expecting stuff on the 2012 that it don't get on the 2011 down. I have done the swap a few times, but again, It is not worth the time/hassle, or gains...

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    GMX322V S/C's Avatar
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    "However, they did succeed in a marketing thing to sell more new cars.."

    LOL, thanks for the insight Jesse.

    Sending you a PM...

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    rjh
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    Re: V2 tuning question for autos

    Assuming a mild mod of 560rwhp on a DD, will changing the shift time to .2 adversely impact the transmission over a 50,000 mile life span?
    Thanks for any input provided.

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    Re: V2 tuning question for autos

    Done correctly, it should extend the life. The extra 100 ponies, that's a different story

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