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Thread: WOT - runs rich at high RPM range

  1. #21
    Advanced Tuner 96gt4.6's Avatar
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    Quote Originally Posted by cjg454ss View Post
    did you try richening it up 1 full point at the rpm it goes lean and see if it helps?
    I have, and it does. However what's in the tune never follows the commanded lambda. So, to get the lambda you want under WOT you have to add .5 richer to keep it where you want it to be through the pull. For some reason, the commanded lambda keeps climbing towards the end of the gear. It's this way on all 3 of my vendor (paid) tunes and I can't seem to find anything in the Editor that would be where it's being commanded to do this.

    One tune I have plays with the injector scaling to offset this condition which does a fantastic job of keeping the actual AFR rock solid through the pull, even though the commanded lambda keeps rising. This alone, seems to indicate that it's a known issue but most are just tuning around it other ways to get what they want.
    '17 Whipple'd S550
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  2. #22
    Advanced Tuner 96gt4.6's Avatar
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    It's almost like there is an "Adder" table i'm either not seeing, or it's not there, that adds to the commanded WOT lambda table.
    '17 Whipple'd S550
    Too many other projects to list.....see my YouTube channel for more: https://www.youtube.com/channel/UCr7...-XfDG53sCh6tcw

  3. #23
    32376 spark preignition adder vs lamda. I have seen sct tunes with values in there that will skew af
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  4. #24
    Advanced Tuner 96gt4.6's Avatar
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    ^ Thanks! I checked, and my 32376 table is all at 0. It seems as if that table is for adding/subtracting spark based on Lambda though, whereas the issue i'm having is that something is modifying the commanded WOT Lambda values on top of the WOT lambda table.
    '17 Whipple'd S550
    Too many other projects to list.....see my YouTube channel for more: https://www.youtube.com/channel/UCr7...-XfDG53sCh6tcw