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Thread: Seeking Base Tune - 03Z with LS2 402 / V3Ti

  1. #1
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    Default Seeking Base Tune - 03Z with LS2 402 / V3Ti

    My LS6 ate a lifter and cracked the block, so I had an LS2 402 built which I am picking up this weekend.

    This is a 58x build, so I believe I will need to use the LPE signal conversion box for cam and crank position sensors. I'll be mounting the knock sensors (LS1 style) to the block exterior.

    It's a simple street build.
    402 @ ~10.5:1
    Arun Jam Cam
    LS7 TB w/ harness adapter
    FAST 92
    (not sure which MAP sensor is on this car currently)
    Siemens Deka #60 injectors
    no MAF
    and a V3Ti w/ 3.8" pulley for now

    Any help getting it started would be appreciated.

  2. #2
    Joe (Moderator) joecar's Avatar
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    Will your engine builder tune your PCM...? He will run the engine on his dyno, get him to run your PCM (and the LPE CKP/CMP converter).

  3. #3
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    No, he is a pro machinist who has been building race engines for years for various track sports. I have a few tuners near me of great experience for dialing it in tightly. For now, a functional idle will suffice. In the long run I don't know if I will stick to factory ecu or one of the aftermarket units.

  4. #4
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    TRG for the win... works rather well.
    "All that is needed for the triumph of evil is that good men do nothing..."

  5. #5
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    Trg?

  6. #6
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    Figured it out after, lol.

    Any suggestions on places to look for an approximate base tune to get the car to idle?

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