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Thread: What is needed for a 2/3 bar tune for LS3

  1. #1
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    Default What is needed for a 2/3 bar tune for LS3

    OS: 12637084
    Cal: 12635862

    I've changed B2101 and B2103 for the 3bar MAP.
    {B2101} MAP Sensor Scaler 312.500000 scaler
    {B2103} MAP Sensor Offset -11.250000 kPa

    Since I'll be less than 14 lbs of boost I will be using the 2bar VVE table
    [{B8103} "Virtual VE Table, 2bar Forced Induction"]

    So what else is needed?
    {B8021} "Operating Zone MAP Boundaries"
    {B8034} Estimated MAP Maximum

    I've been looking over the LSA tune, but dont know how it is configured physically vs a whipple.

    Thanks
    Last edited by opcode; June 17th, 2016 at 07:29 AM.

  2. #2
    Joe (Moderator) joecar's Avatar
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    How much power are you expecting to make, and what injectors do you have...?

  3. #3
    Joe (Moderator) joecar's Avatar
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    You will need to do this:
    - disable/remove MAF (but retain IAT), requires a MAF DTC to show up.
    - disable CL/LTFT/STFT.
    - set up PE to provide sufficient/safe fueling.
    - log data wideband lambda data.


    If engine/ECM is outside of their orginal car, you will need to disable VATS ("Remove VATS" patch and correctly setting VATS parameters).

  4. #4
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    Quote Originally Posted by joecar View Post
    How much power are you expecting to make, and what injectors do you have...?
    All stock LS3 w/ LS9 cam, 2.9L Whipple w/ 4' pully, TSP 2" LT's and CAI.
    The injectors are Siemens 63lb Deka Injectors that come w/ the 2.9L Whipple (60 lbs/hr at 3 BAR (43.5 PSI), running at 59PSI)
    I'm looking for 600HP at sea level to the wheels or as near as I can get.

    Quote Originally Posted by joecar View Post
    You will need to do this:
    - disable/remove MAF (but retain IAT), requires a MAF DTC to show up.
    - disable CL/LTFT/STFT.
    - set up PE to provide sufficient/safe fueling.
    - log data wideband lambda data.


    If engine/ECM is outside of their orginal car, you will need to disable VATS ("Remove VATS" patch and correctly setting VATS parameters).
    This is more for tuning and would be reenabled after correct?

  5. #5
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by opcode View Post
    All stock LS3 w/ LS9 cam, 2.9L Whipple w/ 4' pully, TSP 2" LT's and CAI.
    The injectors are Siemens 63lb Deka Injectors that come w/ the 2.9L Whipple (60 lbs/hr at 3 BAR (43.5 PSI), running at 59PSI)
    I'm looking for 600HP at sea level to the wheels or as near as I can get.


    This is more for tuning and would be reenabled after correct?
    Yes, correct... altho many people ditch the MAF after playing with scaling.

    Which year/model/vehicle is your E38 from (I don't have the OS id's handy at the moment)...?

    If it's earlier than 2009 then the injector tables are limited to 63 lb/hr so will need MAF/VE/IFR scaling; later than 2009 they are 127 lb/hr.

    There are MAF/ETC sanity tables to be looked at also.

    Usually after scaling is tried, MAF is typically thrown away.

    Do you have a stock LS9/LSA tune file for reference...?

  6. #6
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    Quote Originally Posted by joecar View Post
    Yes, correct... altho many people ditch the MAF after playing with scaling.

    Which year/model/vehicle is your E38 from (I don't have the OS id's handy at the moment)...?

    If it's earlier than 2009 then the injector tables are limited to 63 lb/hr so will need MAF/VE/IFR scaling; later than 2009 they are 127 lb/hr.

    There are MAF/ETC sanity tables to be looked at also.

    Usually after scaling is tried, MAF is typically thrown away.

    Do you have a stock LS9/LSA tune file for reference...?
    I have a 2013 ZL1 and 2012 CTS-V automatic tunes to reference.
    It for a 2010 Camaro SS (LS3)

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