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Thread: EBL P4 Flash Tuning a 92 Sonoma GT with a Turbo 4.3

  1. #1
    Carb and Points!
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    EBL P4 Flash Tuning a 92 Sonoma GT with a Turbo 4.3

    I just recently bought Sonoma GT #3 and am in the process of upgrading the suspension with the newer S10 ZQ8 sport suspension to lower it 2" and upgrade the brakes to the 98+ Blazer 4 wheel disk brakes and an 8.5 rear axle with 3.73 and a true trac posi. Engine is getting 96+ vortec heads, vortec marine intake manifold, cam upgrade and the base CR will be about 9.1:1, so wont be running more than about 8-10 PSI at first thru a custom water/air intercooler.

    I will also be swapping out my original CPI 4.3 engine harness and ECM for a Sy engine harness with the 7749 ECM and have ordered the EBL P4 Flash setup just waiting to get my ECM back from Dynamic EFI.

    I pretty much have the engine build taken care of except or what size turbo to run and cam choice. I know alot of the SyTy guys run the comp 412 cam that is 260/266 adv dur and 206/210 dur@.050 with .500/.500 lift on a 112LSA. I have a 2200 stall converter, and with this truck being RWD i don't want full boost way down low cause it will just blow to tires off, looking more for a mid range screamer where i have half a chance to keep traction. My max RPM will be 5500 due to stock bottom end with cast pistons for now.

    I was also looking at a few Lunati voodoo cams that are 262/270 adv dur 211/219 dur@.050 with .507/.515 lift on a 112LSA or the one im leaning towards is 270/278 adv dur 219/227 dur@.050 with .515/.530 lift on a 112LSA. I like the second one cause its very close to the GM LT4 Hot Cam, which Ive read is a decent cam to run with forced induction.

    looking for some thoughts and advice. Thanks
    1992 GMC Sonoma GT
    #492 of 806 Built
    Moth Balled Since 2003

    1992 GMC Sonoma GT
    #003 or 806 Built
    Turbo 4.3
    In Progress

    2000 Tahoe Limited
    Daily Driver
    454/4L80e Swap in Progress

  2. #2
    Super Moderator dave w's Avatar
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    I like the planning you have put into your Sonoma GT project.

    Posting information about tuning the EBL P4 is a very challenging topic. Dynamic EFI clearly states "Do Not Post On Any Board" on all the software I've seen and used. Myself and other gearhead-efi.com members have, and will continue to honor Dynamic EFI's request on what is acceptable to post on a public forum.

    dave w

  3. #3
    Carb and Points!
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    Well i understand about the posting of tune files and bins, but the only bin dynamic has for me is a stock engine bin, and mine will be far from stock so im just looking for some better bins to start with.
    1992 GMC Sonoma GT
    #492 of 806 Built
    Moth Balled Since 2003

    1992 GMC Sonoma GT
    #003 or 806 Built
    Turbo 4.3
    In Progress

    2000 Tahoe Limited
    Daily Driver
    454/4L80e Swap in Progress

  4. #4
    Super Moderator dave w's Avatar
    Join Date
    Feb 2011
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    Most of the EBL tunes I've worked on required modifications to the stock timing table. For example; I tuned a Vortec 350 engine using TBI fuel injection, with a Vortec 350 timing table, not the TBI table provide by EBL.

    dave w

  5. #5
    Carb and Points!
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    Aug 2013
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    Conroe, Tx.
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    I guess that is the main thing that i need is the vortec head timing table so it gives me a place to start. Preferably a timing table setup for boost, and the rest of the info i can put in and go from there with the auto tune feature.

    Where do i get the vortec V6 timing table?
    1992 GMC Sonoma GT
    #492 of 806 Built
    Moth Balled Since 2003

    1992 GMC Sonoma GT
    #003 or 806 Built
    Turbo 4.3
    In Progress

    2000 Tahoe Limited
    Daily Driver
    454/4L80e Swap in Progress

  6. #6
    Super Moderator dave w's Avatar
    Join Date
    Feb 2011
    Posts
    3,300
    One option for timing tables would be to download the demo version of EFI Live: http://www.efilive.com/latest/cat/download-efilive

    and get the 4.3 files from tunefiledepot:http://www.tunefiledepot.com/index.p...Type=P&Stock=Y

    Maybe you can copy / paste the timing tables to / from an Excel spreadsheet?

    dave w

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