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Thread: boost control

  1. #21
    Senior Tuner Jim P's Avatar
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    It forces your wastegate solenoid dutycycle to be no less than 80%, so it?s forcing it to stay more closed or in other words not allowing it to open as much.

  2. #22
    Senior Tuner Jim P's Avatar
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    With min wastegate solenoid duty cycle back down to 0% your desired estimated airflow tables should work properly to control the wastegate solenoid.

  3. #23
    gocha, so if I have the minimum duty set to 80 percent it could only open the wastegate a max of 20 percent open?

  4. #24
    Senior Tuner Jim P's Avatar
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    More or less, yes

  5. #25
    thanks for the help, now I have a better idea of what stuff does

  6. #26
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    In my experience less timing will help get turbo going then add fuel then add your timing I don?t know how Cummings run but stock my Powerstroke timing map has -1.75 degrees you can also use post injection and split pilot not that I know how but i read it in a hot rod magazine

  7. #27
    Senior Tuner Jim P's Avatar
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    5.9 doesn?t have split pilot but you can use pilot and main to create a split injection event, I wouldn?t bother with that though. Reduced timing can be used to help aid spool but as mentioned elsewhere, the Cummins does like timing to get aggressive quick.