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Thread: 2020 zl1 throttle closing due to ... Tcm???

  1. #1
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    2020 zl1 throttle closing due to ... Tcm???

    been trying everything and no luck throttle stays @ 50% from 2000-4000rpm then opens for the rest of the pull.... read in older post TCM was the one responsible for this happening.. is there a way around it since the TCM is not tunable? any help is greatly appreciated. Thanks.

  2. #2
    Senior Tuner Ben Charles's Avatar
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    Can work just fine with stock TCM

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  3. #3
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    post the tune

  4. #4
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    agh.. i know.. i left my tuning laptop at the shop.. will post up tomorrow morning.

  5. #5
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    ah. well i was going to look at the max throttle area % vs RPM table, ive seen a few posts now where that was the issue. might not be 100% across the table from factory

  6. #6
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    actually have that at 200% across the table.

  7. #7
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    why 200? It's not like you can get anymore open than 100%
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  8. #8
    Senior Tuner Ben Charles's Avatar
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    People like to max stuff out... if it had an option for 250 people would do it...

    But I agree 100 is fine

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  9. #9
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    usually dont mess with that table but i thought id give it shot... anyway attached is the file and log.

    2020 CAMARO ZL1 - PORTED BLOWER-KOOKS 2in HEADERS-CORSA X-BIG GULP CAI-2.3in PULLEY-LMP LID - DY.hpt2020 ZL1 - DYNO 2.hpl

  10. #10
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    im no expert, but isnt .91 lambda on a boosted car just asking for trouble?

  11. #11
    Senior Tuner Ben Charles's Avatar
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    Quote Originally Posted by ShaneB View Post
    im no expert, but isnt .91 lambda on a boosted car just asking for trouble?
    Yes it is....

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    96 TA Blown/Stroked, 4L80E/Fab 9
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    Custom Mid Engine chassis, AKA GalBen C

  12. #12
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    do these cars have a lower torque limit for break in like the vette?.. car only has 280 miles. had a thought.. is it possible to cut everything in half and make the ecu think its "half" the torque its making.?