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Thread: MSD Boost controller help

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  1. #1

    Default MSD Boost controller help

    I recently installed an MSD boost controller on my race car. The engine is a 4 cylinder turbo making approx 575hp. I have went to my local track to try and get some data and get the PID values correct. I am real new to this PID stuff and was hoping someone could take a look at my ACQ file and give me some pointers. PWM is swinging from one end to the other at 40 and 159 and boost is all over the place.

    This run was with the PID at 40, 40 and 40.
    Attached Files Attached Files

  2. #2
    msdtech21 Guest


    I dont really know whats going on but there's no usable data in that run.

    Boost controller bad run.JPG

  3. #3
    msdtech1955 Guest


    what is your set-up ?

  4. #4


    Attached is my latest ACQ file.

    It is keeping boost down right around 26-27psi but the target is 32-33.

    What I don't understand is why the PWM is 159. If boost is below target, PWM should be like 40 correct?

    Also, I do not have RPM registering, should it be? Is that one of my problems? I can hear the solenoids clicking when I rev up the engine.

    PID was 30-15-10. With PID at 30-15-0 it was overboosting to 38psi the whole way.

    Attached Files Attached Files

  5. #5
    msdtech1955 Guest


    just got back in , will look at it today .

  6. #6


    Any luck looking at the file?

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