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Thread: LS2 GTO L92/L76 swap

  1. #1
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    Default LS2 GTO L92/L76 swap

    Newbie to forum and EFILive, looking for info on correcting injector size in 2006 GTO with L92 head/L76 intake swap. I believe stock injectors are 33lb units and all the info I have found states L76 intake delivered with the new 2007 Z06 40 lb injector, can anyone confirm this info?
    Also were in the tune software do I change the injector sizing? Is it Injector Flow Base?
    Any help or guidance would be greatly appreciated.

    Rob

  2. #2

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    Welcome to the forum!

    The stock injector for the LS7 are rated at 40 lbs/hr. Not sure of the L76 injectors.

    Howard

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  3. #3
    EFILive Distributor dfe1's Avatar
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    In the LS2 world, Injector Flow Base is the injector flow rate-- table B1215. Keep in mind that these rates for systems with a pressure regulator that is not referenced to manifold pressure. If you change the fuel system and incorporate an aftermarket pressure regulator, there's no need to scale flow rate. Also, you can build a conversion table to display in pounds per hour. Copy the injector flow base table to the clipboard, click on Conversions in the main calibration window, the click "Create New Table" and convert from grams per second to pounds per hour.
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    Once I create this table, how do I plug in the correct numbers for the Z06 40lb injectors.

    Great info guys I thank you for the help.

    Rob

  5. #5
    EFILive Distributor dfe1's Avatar
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    If you create the table in lbs/hr, convert it to grams per second, then copy with labels and paste with labels into B1215. The values for 40-pound injectors are (in grams/second):
    Injector Flow Base (mg/ms)
    kPa Value
    0 5.040000
    5 5.071400
    10 5.102600
    15 5.133700
    20 5.164500
    25 5.195200
    30 5.225600
    35 5.255900
    40 5.286100
    45 5.316000
    50 5.345800
    55 5.375400
    60 5.404900
    65 5.434200
    70 5.463300
    75 5.492300
    80 5.521200

    In lbs./hr.

    0 40.000000
    5 40.249881
    10 40.497504
    15 40.744334
    20 40.988782
    25 41.232437
    30 41.473711
    35 41.714191
    40 41.953878
    45 42.191184
    50 42.427695
    55 42.662620
    60 42.896751
    65 43.129295
    70 43.360251
    75 43.590413
    80 43.819782
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    Thanks, that worked great. The car starts and runs much better. Now when I start fine tuning air fuel do I use another table? Also when correcting for improved air flow do I adjust the VE table or is this done in another table?

    Thanks so much for the valuable advice I couldn't do this job without your help.

    Rob

  7. #7
    EFILive Distributor dfe1's Avatar
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    Quote Originally Posted by robo1
    Thanks so much for the valuable advice I couldn't do this job without your help.

    Rob
    Glad to hear it worked out. Now all I need is an address so I can send you a bill.
    DigitalEFI- EFILive US Distributor
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  8. #8
    Lifetime Member SSpdDmon's Avatar
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    Quote Originally Posted by dfe1
    Glad to hear it worked out. Now all I need is an address so I can send you a bill.
    That's a good line... I wish I would have thought of that earlier. I'd be a hundred-aire by now. :lol:

  9. #9
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    Hi guys, new to the forum.

    This topic caught my eye because i'm planning on doing the L92 head/L76 intake swap on an 6.0L, LQ9 (truck version of the LS2 engine). right now i haven't done any mods because i am weary of the tuning and electrical. i downloaded the demo efi live version and i understand some things but when i got further into the program i lost myself. right now i have plans layed out for a 6.0L swap/project but i don't want to proceed unless i know i can do atleast some simple tuning. i've heard that some guys have tuned the stock LQ9 and got almost 50 more hp out of it! has anyone done a tune similar to this one? it would be nice if i could "simulate" this tune on the demo so i have an idea of what to do when the engine is in the truck.

    cheers

  10. #10
    EFILive Reseller ringram's Avatar
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    Check out the tutorial section and read the custom os and autotune guides. Thats the easy bit.
    Then do a search for RAFPN tuning and idle tuning.
    At that point you should have some good strings in your bow.
    Get EFILive in europe (http://www.efilive.eu).
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    2014 VF SV LS3 Maloo.

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