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Thread: Little advice please...

  1. #1
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    Default Little advice please...

    What PID's do I need to log when tuning in OLSD mode??? Could I get a list please....

    THANKS
    01 Z06, 4L60E CONVERSION, L92/L76 TOP END, 72# LS3 INJECTORS (THANKS FIC), DRY NITROUS, COS5

  2. #2
    Lifetime Member SSpdDmon's Avatar
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    SAE.TP
    GM.DYNCYLAIR_DMA
    CALC.BEN_LM11
    GM.DYNAIR
    GM.AFR
    GM.IACDES_B
    SAE.ECT
    SAE.RPM
    EXT.AD1
    SAE.FUELSYS
    SAE.SPARKADV
    SAE.IAT
    SAE.MAP
    GM.MANVAC
    GM.MAFFREQ
    GM.KR
    SAE.VSS
    CALC.AFR_LM11

    That's what I was logging...

  3. #3
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    Quote Originally Posted by SSpdDmon
    SAE.TP
    GM.DYNCYLAIR_DMA
    CALC.BEN_LM11
    GM.DYNAIR
    GM.AFR
    GM.IACDES_B
    SAE.ECT
    SAE.RPM
    EXT.AD1
    SAE.FUELSYS
    SAE.SPARKADV
    SAE.IAT
    SAE.MAP
    GM.MANVAC
    GM.MAFFREQ
    GM.KR
    SAE.VSS
    CALC.AFR_LM11

    That's what I was logging...
    Why would you log GM.MAFFREQ..???? If running OLSD w/out a MAF why would you log it???

    And what is GM.IACDES_B...????

    THANKS
    01 Z06, 4L60E CONVERSION, L92/L76 TOP END, 72# LS3 INJECTORS (THANKS FIC), DRY NITROUS, COS5

  4. #4
    Lifetime Member SSpdDmon's Avatar
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    Because once you have the SD part dialed in, the idea was that you log MAF Hz vs. GM.DYNAIR so that you could construct a new MAF curve.

    GM.IACDES_B (at least on an f-body) shows how much air was being let in through the IAC valve, which is done instead by the ETC on C5's. I'm not sure if it'll work for your application. If it does, it should help you with the Desired Idle Airflow table (Idle).

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    Quote Originally Posted by SSpdDmon
    Because once you have the SD part dialed in, the idea was that you log MAF Hz vs. GM.DYNAIR so that you could construct a new MAF curve.

    GM.IACDES_B (at least on an f-body) shows how much air was being let in through the IAC valve, which is done instead by the ETC on C5's. I'm not sure if it'll work for your application. If it does, it should help you with the Desired Idle Airflow table (Idle).

    But I wanna ditch the MAF...and if youre doing an SD tune isnt the MAF suposto be shutoff??? so how could you log the MAF w/it being shutoff???
    01 Z06, 4L60E CONVERSION, L92/L76 TOP END, 72# LS3 INJECTORS (THANKS FIC), DRY NITROUS, COS5

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    I believe you still have it in faillure mode, so the PCM doesn't use the MAF, but you can plug the MAF in and log the MAF Hz.

  7. #7
    Lifetime Member SSpdDmon's Avatar
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    SD only ignores the MAF for fueling since it's reported as a failure. You can still log what the MAF is reporting.

    If the MAF pid or the IAC pid doesn't make sense for you to log....then you don't have to. I was only posting what I had logged when I went OLSD. Most of those are what you're gonna want though.

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    ^^^Thanks.... Thats cool for peeps who still wanna log the MAF...

    Its getting closer Jeff.....

    Jeff do you need to do autoVE when converting to OLSD mode?? Can the VE be left stock if possible??? just curious....

    thanks
    01 Z06, 4L60E CONVERSION, L92/L76 TOP END, 72# LS3 INJECTORS (THANKS FIC), DRY NITROUS, COS5

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    Jeff where is, GM.DYNAIR located in the PID sections??? cant find it....
    01 Z06, 4L60E CONVERSION, L92/L76 TOP END, 72# LS3 INJECTORS (THANKS FIC), DRY NITROUS, COS5

  10. #10
    Lifetime Member SSpdDmon's Avatar
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    If the car is going to run in SD, then you need to dial in the VE table. The only way you could potentially get away with leaving it stock is on a bolt-ons only car running closed loop speed density. The fuel trims (once learned) would keep part throttle in check and you'd have to dial in WOT through PE. But, it's more than likely that commanded AFR wouldn't match watch the WB reports.

    GM.DYNAIR is under 'Air' in the System drop down menu.

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