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Thread: Active Exhaust Valve tables

  1. #1

    Active Exhaust Valve tables

    Can someone explain which tables and how we should be modifying to adjust the exhaust valve open and close for the E92? What I want to accomplish is when in Sport Mode the valves stay open longer. Currently if under a certain rpm they stay shut until speed goes below 15 mph then they open.
    Pic is 2016 CTS-V
    Thank you

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    hpt-npp3.JPG

    UPDATE=
    Ok I figured out some things and got it how I want.
    EXHAUST VALVE PERFORMANCE MODE 0 = Tour, 1= Sport, 2= Race, 3 = Snow
    I put -1 in all MODE 2 so the valves stay open in Race Mode. I adjusted Sport mode so the valves are open from P thru 5th gear. So they only close in 6-8th gear. Pretty cool.

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    Last edited by Racerbox77; 09-22-2023 at 09:44 PM.

  2. #2
    I think I'll try and see what can be monitored on the exhaust side to understand which mode its in when, that will at least get me started. Any tips?

  3. #3
    -1 is open 100 is closed. So populate the gear and rpm ranges with -1 where you want them to be open. Not sure why GM uses numbers like 30 and 40 because the valves open and close only. there is no partial opening point.

  4. #4
    Tuner in Training
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    Quote Originally Posted by 1scls1z View Post
    Not sure why GM uses numbers like 30 and 40 because the valves open and close only. there is no partial opening point.
    Pretty sure there is partial open on the Camaros

  5. #5
    Quote Originally Posted by easttxss View Post
    Pretty sure there is partial open on the Camaros
    I have never been able to get mine too partially open.

  6. #6
    The 30-40 is throttle % or load that opens the valves.

    Partial opening didn?t happening until ct5 blackwing