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  1. Replies
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    What is looking weird in the MAF? Why are you...

    What is looking weird in the MAF?

    Why are you only logging one bank of fuel trims?
  2. Log you posted is only 8:40....

    Log you posted is only 8:40....
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    How close is your VVE table using a wideband?

    How close is your VVE table using a wideband?
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    Burn it and collect the insurance money, that was...

    Burn it and collect the insurance money, that was the worst Saab/GM motor ever. They blew up from the factory stock and I imagine tuning it would just make the rods fail sooner.
  5. You want to filter out any transient throttle...

    You want to filter out any transient throttle conditions as these will be rich/lean spikes that will skew everything. Also you want to filter out data during transmission shifts, certain fuel trim...
  6. This isn't exactly what you asking for per DD map...

    This isn't exactly what you asking for per DD map but its something to play with

    https://forum.hptuners.com/showthread.php?80784-Torque-Request-Rate-Limits
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    Right on, this is very helpful. Once we get...

    Right on, this is very helpful.

    Once we get this Whipple noise figured out I will see how it behaves on the dyno and make sure to look at the Density Tables, they look stock compared to base file...
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    Camaro? Corvette? They are different

    Camaro? Corvette? They are different
  9. I remember Howard from Redline mentioned a while...

    I remember Howard from Redline mentioned a while back that when NW had the 103 come out for the LT's he said it didn't need a scalar update and Howard questioned it but Nick said the low throttle...
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    Looks like Lingenfelter provides this data with...

    Looks like Lingenfelter provides this data with their injectors but I know there are really impossible to get ahold of for support. Would you say this data isn't correct?

    My understanding of these...
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    Thanks for the input Jason. I chatted with...

    Thanks for the input Jason.

    I chatted with someone at XDI and they said the same thing basically. No need to risk it, I will put the ceiling at 21MPa and see how much ethanol it will take.

    Are...
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    Max rail pressure aftermarket injectors

    For those of you who have calibrated cars with larger DI injectors like XDI's +30%, how far have you pushed rail pressure?
    XDI notes that maximum pressure is 2900PSI "(tested rock solid on engine...
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    If it is an E67 ECM then I would post this or...

    If it is an E67 ECM then I would post this or have the mods move it to the Gen4 section.
  14. Yes, just load the stock file, adjust your...

    Yes, just load the stock file, adjust your throttle area, I would try 7200 and see if that helps with the idle.

    Many ways to get the VVE off but steady state data is needed.
  15. What is your process for calibrating the VVE...

    What is your process for calibrating the VVE table? Using filters?

    I plugged in your data into my graphs and it shows it massively lean at 1000 RPM.

    Another thing, your engine torque at idle...
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    MAP sensor readings look ok, setting high baro...

    MAP sensor readings look ok, setting high baro threshold to 118kpa, sounds like you shut down VVT.

    Many issues with VVT solenoids on factory engines, try unplugging it and driving it.
  17. You can do it that way, or you can calibrate them...

    You can do it that way, or you can calibrate them both at the same time but it requires the math for the GMVE, which can be found here:
    ...
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    Where are you located? Whipple bypass valves...

    Where are you located?

    Whipple bypass valves have been known to cause issues but if you think its staying closed when the surge happens then I guess that would rule it out.

    Can you monitor...
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    ECM Table 2402 is the minimum map table for PE to...

    ECM Table 2402 is the minimum map table for PE to enable.

    You have it set to 105kpa. Meaning PE will not enable until manifold pressure is 105KPA. If you want PE to enable sooner, make is 90KPA...
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    The values they give are for the linearization of...

    The values they give are for the linearization of the MAP sensors KPA to voltage reading. It shouldn't be tailored to your local baro pressure or anything like that.
    I would leave it at the values...
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    If you are using one of those modified 2.5bar MAP...

    If you are using one of those modified 2.5bar MAP sensors then I believe the offset is 10.21KPA not 12.21KPA but check with whoever is selling it to you.

    Will need to retune the VE table with the...
  22. Have you adjusted the VVE table for the new cam?

    Have you adjusted the VVE table for the new cam?
  23. Post the file and log, make sure to log fuel...

    Post the file and log, make sure to log fuel pressure, desired fuel pressure or requested, fuel pressure mode, instantaneous fuel flow as well.
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    Some people will turn off LTFT, some won't....

    Some people will turn off LTFT, some won't. Unless the setup is radical I will keep them on but sometimes they need to be turned off as they skew things fueling wise.

    I would exhaust any...
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    Yes, this was going to be part of my diagnostic,...

    Yes, this was going to be part of my diagnostic, I have a baro breakout harness for a centrifugal supercharger setup that is used to specially keep this from happening when the MAF sensor is...
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