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Thread: 2021 Silverado 6.2L - cammed by- Whipple- fueling maf or VE?? WTF

  1. #1

    2021 Silverado 6.2L - cammed by- Whipple- fueling maf or VE?? WTF

    Im balls deep into this 2021 with a 2.9 Whipple and an upgrade camshaft. The ecm is the E90 and the maf curve is weird AF! At this point I?m definitely off the reservation as to what is familiar.

    Anyone known exactly how the fueling works? Before we had the ability to use maf only, VE only, or blended by adjusting the dynamic airflow tables.

    Now I only have the maf and the Neural Network VE and I cant tell if its blended or when its maf only. We no longer have dynamic airflow to switch it around.

    Only issue Im having is fueling at wot . Im not even sure what to make of this new maf or how exactly Im supposed to train my VE.


    Any guidance would help me out!
    Last edited by regorih; 1 Week Ago at 12:05 PM.

  2. #2
    I did a 2021 Sierra with a Whipple, and as soon as I was able to get the MAF transfer routines to generate the correct amount of airflow, fueling was spot on. I didn't have to do anything with NN

  3. #3
    Senior Tuner Ben Charles's Avatar
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    The MAF is really just backwards..

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  4. #4
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    Quote Originally Posted by Ben Charles View Post
    The MAF is really just backwards..
    Backwards or backward and up side down? Based on what I see i looks like you would subtract from the values to add fuel and add to the values to subtract fuel. I haven't tuned a 2021 yet but its only a matter of time.
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  5. #5
    Senior Tuner LSxpwrdZ's Avatar
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    The MAF just tunes similar to a Coyote car. It's pretty simple to just populate your fuel trim and WB error vs the breakpoints of the new table. I did a procharged stock cam deal and MAF tuning is all it really required outside of updating the MAP sensor to a LS9. I did no NN training.
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  6. #6
    Senior Tuner Ben Charles's Avatar
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    Yep Just fuel trim/eq ratio against commanded like anything else!! Haven’t touched any NN either…

    You can also change and edit the axis

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  7. #7
    I keep reading where people have tuned 2019+ E90 vehicles with upgraded camshaft and adding boost, that state that the Neural Network was not touched. So at what point do you need to modify the NN?

  8. #8
    Senior Tuner Ben Charles's Avatar
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    As time goes on I believe it will be common practice to mod it, we are just getting by without it in my opinion for now

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  9. #9
    I made changes to the NN and saw huge drivability improvements

  10. #10
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    Quote Originally Posted by regorih View Post
    I made changes to the NN and saw huge drivability improvements
    How much time did it take with the new NN trainer to get it where you wanted it?

  11. #11
    About 2 hours