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Thread: Custom OS#5

  1. #321
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by whackem04 View Post
    Whats the best way to populate the TPS map at the hard to reach, low TP high RPM area?
    Eyeball extrapolation.

  2. #322

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    I've read the tutorials and every thread related to OS5.
    I cannot figure out how the table "Commanded Fuel vs RPM (Normal) should be set or it's function. {B3647}
    I am setting up my PCM for simple nitrous spark retard. I think I have told the new OS to ignore TPS VE (Disable)
    The tutorial talks about B3647 a bit and suggests initial settings. But I have not read on here that anyone has modified this table and or if it should just be set to 1.0
    Any tips?
    the B3647 has me stumped.
    I don't have B3660
    My original OS was 12212156
    thanks,
    Karl Ellwein
    www.EllweinEngines.com
    Personal cars:
    95 impala SS running on an old Speed Pro PCM (Budget 355 LT1)
    Customer cars:
    96 impala SS, LT1-395ci, 4L60E, Stock LT1 PCM
    96 impala SS, LT1-399ci, 4L60E, BP Harness to 0411 PCM and 24x EFI Connection components
    95 impala SS, LT1-395ci, 4L60E, Re-Pinned stock harness to 0411 PCM and 24x EFI Connection components

  3. #323
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    Quote Originally Posted by Ellwein Engines View Post
    I've read the tutorials and every thread related to OS5.
    I cannot figure out how the table "Commanded Fuel vs RPM (Normal) should be set or it's function. {B3647}
    I am setting up my PCM for simple nitrous spark retard. I think I have told the new OS to ignore TPS VE (Disable)
    The tutorial talks about B3647 a bit and suggests initial settings. But I have not read on here that anyone has modified this table and or if it should just be set to 1.0
    Any tips?
    the B3647 has me stumped.
    I don't have B3660
    My original OS was 12212156
    thanks,
    Karl Ellwein

    send me your email addr, I'll send you a copy of my tune setup for nitrous, OL, No Trims, No MAF. It will give you an idea. BTW, I would leave 3647 alone unless you are VE tuning.
    07 Silverado DMax Classic
    02 Z06 LS3 416, 805rwhp, TFS245, Wiseco, Callies Crank/Rods, Iskendarian Lifters, Crower Rockers, FAST102/90, ATI Damper, 1-7/8 Kook's LT, QkTime Shield,Tolle-Fab 8pt
    Old Engine: 1/4mile = 9.6/146 New Engine:?

    EFI Live Tune/Scan v7.5.27, EFI Live Scan and Tune v8.2.23, build 276, BootBlock 2.07.06, FirmWare 2.07.52, 512K RoadRunner (12.14.R), Innovate Serial LC2x2


    COS5/12212156 For 2002 Z06 Manual Vette

  4. #324

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    Quote Originally Posted by TFZ_Z06 View Post
    send me your email addr, I'll send you a copy of my tune setup for nitrous, OL, No Trims, No MAF. It will give you an idea. BTW, I would leave 3647 alone unless you are VE tuning.
    Thanks, the comparison will help a lot.

    karl@ellweinengines.com
    www.EllweinEngines.com
    Personal cars:
    95 impala SS running on an old Speed Pro PCM (Budget 355 LT1)
    Customer cars:
    96 impala SS, LT1-395ci, 4L60E, Stock LT1 PCM
    96 impala SS, LT1-399ci, 4L60E, BP Harness to 0411 PCM and 24x EFI Connection components
    95 impala SS, LT1-395ci, 4L60E, Re-Pinned stock harness to 0411 PCM and 24x EFI Connection components

  5. #325
    Joe (Moderator) joecar's Avatar
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    B3647 is the OL fueling table, it is used only in OL. If PE enables during OL then the richest of the two is selected (at the current operating cell).

    B3647 is not used when you go from CL to WOT as in this case the residual LTFT is applied to WOT (i.e. in this case WOT is a reduced CL mode where even tho trims are not updated and applied, the last residual trim is applied).


    You could do any of these:

    a. set B3647 to EQR 1.0 everywhere (and make sure PE enables and is suitably rich at EQR 1.175 for NA).

    b. set B3647 to EQR 1.0 below 75 kPa, and then ramp it up to EQR 1.175 (regardless of whether PE has enabled yet).

    For NA you could have either PE and/or the high MAP columns of B3647 provide high load fueling.

    For boost, you would enable PE at 105 kPa and set PE fuel suitably rich for boost.


    Using B3647 means you will have to play with the OL ECT correction table A0008 (introduced by the COS in the A segment).
    Last edited by joecar; January 25th, 2016 at 01:24 PM. Reason: added id of OL ECT correction table

  6. #326

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    thanks a lot. That helps. Thanks Joecar and thanks TFZ_ZO6 for the file to let me compare.
    www.EllweinEngines.com
    Personal cars:
    95 impala SS running on an old Speed Pro PCM (Budget 355 LT1)
    Customer cars:
    96 impala SS, LT1-395ci, 4L60E, Stock LT1 PCM
    96 impala SS, LT1-399ci, 4L60E, BP Harness to 0411 PCM and 24x EFI Connection components
    95 impala SS, LT1-395ci, 4L60E, Re-Pinned stock harness to 0411 PCM and 24x EFI Connection components

  7. #327

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    One more question:
    If you had an OK tune for B3647 for the car prior to installing the custom OS5 then would you paste that old table into new OS5 B3647 table as a starting point?
    www.EllweinEngines.com
    Personal cars:
    95 impala SS running on an old Speed Pro PCM (Budget 355 LT1)
    Customer cars:
    96 impala SS, LT1-395ci, 4L60E, Stock LT1 PCM
    96 impala SS, LT1-399ci, 4L60E, BP Harness to 0411 PCM and 24x EFI Connection components
    95 impala SS, LT1-395ci, 4L60E, Re-Pinned stock harness to 0411 PCM and 24x EFI Connection components

  8. #328
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by Ellwein Engines View Post
    One more question:
    If you had an OK tune for B3647 for the car prior to installing the custom OS5 then would you paste that old table into new OS5 B3647 table as a starting point?
    The GM OS does not have table B3647...

    When you install the COS, it replaces B3605 (which is ECT x MAP) with B3647 (which is RPM x MAP), and it retains the old data that B3605 contained...

    so your new B3647 looks like the old B3605, but because the vertical axis now RPM (instead of ECT), the data in this table is not completely sensible, you have to edit it (see my suggestions above).



    i.e. B3647 occupies the same space as B3605, but it changes the vertical axis from ECT to RPM, so the ECT x MAP data is not valid, you have to edit it into sensible RPM x MAP data.

  9. #329

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    Quote Originally Posted by joecar View Post
    The GM OS does not have table B3647...

    When you install the COS, it replaces B3605 (which is ECT x MAP) with B3647 (which is RPM x MAP), and it retains the old data that B3605 contained...

    so your new B3647 looks like the old B3605, but because the vertical axis now RPM (instead of ECT), the data in this table is not completely sensible, you have to edit it (see my suggestions above).



    i.e. B3647 occupies the same space as B3605, but it changes the vertical axis from ECT to RPM, so the ECT x MAP data is not valid, you have to edit it into sensible RPM x MAP data.
    AhHa! that makes it even more clear. Thank you so much joecar.
    www.EllweinEngines.com
    Personal cars:
    95 impala SS running on an old Speed Pro PCM (Budget 355 LT1)
    Customer cars:
    96 impala SS, LT1-395ci, 4L60E, Stock LT1 PCM
    96 impala SS, LT1-399ci, 4L60E, BP Harness to 0411 PCM and 24x EFI Connection components
    95 impala SS, LT1-395ci, 4L60E, Re-Pinned stock harness to 0411 PCM and 24x EFI Connection components

  10. #330
    Joe (Moderator) joecar's Avatar
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    No worries let me know how it goes.

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