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Thread: Disable Neural Network

  1. #21
    Advanced Tuner uarperformance's Avatar
    Join Date
    Apr 2007
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    Redington Beach FL
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    226
    I am not super tuner guy by any means, but we have tuning Chrysler Vehicles since they had tuning for them from a name we wont mention here. We always used VE tables for tuning, same as all VE based tuning until 2009 when VVT came into place, I am all ears for someone who could explain it in laments terms for the many to understand. If you disable the neural network and see it is 10 % rich or lean and apply or remove that percentage from the VE table. your trims will not be correct 99% of the time, It uses many other layers to determine that fuel mass, so if you add 10 percent to the VE you will not see a 10 percent change, it will usually be off the amount you added or subtracted or more. We use a WiTech Chrysler tool for our relearns and flashing. I am not here to argue but the changing of the VE without knowing the variables it uses in the equation is a incorrect tuning method then also. I usually try it on header vehicles just for giggles when I get one just to see if some vehicle will work and maybe one doesnt. we did a 2012 Challenger one time and used the Ve table and it seem to work peerfectly, a couple weeks later it came in running poorly and rich codes while crusing, had to revert back to injector scaling after wasting another day of trying to use VE tables. Vehicle drove perfect . If you rescale injector scaling properly and target AFR on boosted vehicles your driveability will be a clean tune.

  2. #22
    Advanced Tuner
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    Jan 2009
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    Spokane, WA
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    How did this turn out?

    For the why... Tuning a 2010 5.7 truck with a 2014 6.4 swapped in. So injectors, etc are all different - keeping the 2010 5.7 PCM. Found the thread after I saw changing the VE table doesn't make a damn bit of difference. Right now it looks like fuel trims are about -18% everywhere. Have not had on the dyno with the wideband yet to confirm, but I have no reason to suspect they are not correct.

  3. #23
    Advanced Tuner mbray01's Avatar
    Join Date
    Dec 2013
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    Slidell, La.
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    897
    There is another thread, it states to turn off all vvt, then it will enable ve tables
    Michael Bray
    Rusty Knuckle Garage
    Slidell, Louisiana
    20yr Master Tech.
    Advanced Level Specialist
    Custom Car Fabrication, Customization, High Performance.
    GM World Class Technician
    Shop Owner

  4. #24
    Potential Tuner
    Join Date
    Apr 2019
    Location
    Murrieta, CA
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    I'm currently tuning a 2017 Charger with a RIPP supercharger on it and an MPVI2. I have gone to turn off NN in the Airflow tab by selecting it as Disabled and I still do not have access to a VE table. Is there something I'm missing to find the VE table?

  5. #25
    Advanced Tuner
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    Mar 2018
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    Illinois
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    As I stated in your other post, the VE tables are under airflow->speed density.

  6. #26
    Interesting thread
    I ran my GC srt8 2016 With NN off. It took a while to get it right , Had to rewrite the EX camshaft map then the VE tables and PE tables worked effectively. .
    I now run with NN on and have rescaled the inj to get it to comply with my PE map etc
    For me the NN ON is the best way fuel economy on the open road etc

  7. #27
    Advanced Tuner
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    Mar 2018
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    Illinois
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    Excuse my ignorance but scaling injectors is also dependent on ambient conditions, no?