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  1. #1
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    jb3 2.0 loggin fun

    any advice??
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    Maybe this is stupid, but what is PID PSI vs. ECU PSI?

  3. #3
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    FROM JB3 SIte

    1) Pre-Boost. Boost pressure as measured before the throttle body. Generally will match manifold boost pressure like one might read from a mechanical boost gauge except in cases where the throttle body is not fully open. Such as during DTC intervention or loss of traction, sudden shifts, letting off the throttle at the end of a run, and over target conditions where the ECU throttle safety is kicking in. During these conditions pre-boost will spike up prior to the diverter valves opening. Scale is 0-20psi along the left of the chart.

    2) RPM. Engine speed in revolutions per minute. Will roughly match your dash tachometer. Scale is 0-7000RPM along the right of the chart.

    3) IAT. Air intake temperature post intercooler in degrees Fahrenheit. Scale is 0-20 = 0-200 degrees F along the left axis.

    4) TPS. Throttle position / gas pedal sensor, 0% = idle, 100% = wide open throttle. Scale is 0-10 = 0-100% along the left axis.

    5) MAP. Currently selected performance map. You can use the drop down to change maps while logging is active.

    6) Fuel. Amount of fuel enrichment being added. Scale is 10-20 = 0-100% along left axis.

    7) ECU PSI. The amount of boost the ECU is observing, generally 6-8psi during WOT activity. Used as the process variable for the PWM PID controller. Scale is 0-20psi along the left axis.

    8) PID PSI. The minimum ECU PSI allowable for the given conditions. Above this value less PWM is required and below this target more PWM is required. Scale is 0-20psi along the left axis. It is normal for ECU PSI to float high above PID PSI under certain conditions such as part throttle indicating the JB3 does not need to supplement PWM at that time. As ECU PSI falls below PID PSI the JB3 must increase PWM to sustain target boost levels.

    9) PWM. The boost solenoid/duty cycle/wastegate offset. Higher values indicate more wastegate closure initiated by the JB3 and lower values indicate less wastegate closure. This value is determined by the PID controller which is driven off ECU PSI and PID PSI and influenced by parameters under user adjustment.

  4. #4
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    Good info.

  5. #5
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    Looks good for performance. I'd probably reduce throttle gain more to lower the shift spike. But your call on that. Click here to enlarge

  6. #6
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    ya i reduce everything dont want to blow my little turbo that fast lol

  7. #7
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    Damn! If you drive like this everyday...well let's say you might be eligible for a turbo upgrade Click here to enlarge

    You get your virus fixed? haha

  8. #8
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    Yes Reputation No
    Click here to enlarge Originally Posted by greatest335i Click here to enlarge
    any advice??
    Map? or settings?

  9. #9
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    this was done on map 1 the tunning map on 2.0
    here the setting

    Tq; 92
    Hp; 75
    Fuel; 100
    Iat; 8
    lagfix; 100
    boost limit; 18

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