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Thread: Couple of tuning questions ?

  1. #1
    Advanced Tuner
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    Couple of tuning questions ?

    I am new to tuning but have been reading tons and started on a new 2 bar OS tune for my boosted 2007 vette.
    I can not find the answers to these question after many hours of reading, logging , and searching.
    Although I am commanding 14.40 as stoich, my car always seems to hover closer to 14.7 anyways, or even a little higher. Is this normal ?
    I have done some part throttle tuning (my first time), and although I can get the VE and the maf where I want them seperately, (+/-3 trims in most areas) as soon as I turn them both on they are not as good. What can I look for to solve this.
    Thanks
    2007 Corvette C6 Vert. A6
    LME LS402, Pat G custom cam, ATI 10% OD Damper
    Circle D triple disc 2600, 3.42 Diff
    YSI, 3.0 pulley, ID 1000's
    Alky Control Meth,
    ARH 1 7/8 headers,
    1009 RWHP @ 7000, 817 RWT @ 6000

  2. #2
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    Quote Originally Posted by realcanuk View Post
    Although I am commanding 14.40 as stoich, my car always seems to hover closer to 14.7 anyways, or even a little higher. Is this normal ?
    The O2 sensors are actually lambda sensors and will always correct to 1 lambda. You could put arbitrary numbers in for your stoich values but it is going to run at 1 lambda while in closed loop.

  3. #3
    Senior Tuner
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    The value in "stoich" in your tune is so that math works everywhere else...set it equal to stoich for your fuel.
    2010 Camaro SS M6. Stock Bottom End, Heads/Cam/Intake/Headers/Exhaust.
    2005 Silverado RCSB. Forged 370 LQ9/Borg-Forced Inductions T6 S484/Jake's Stage 4 4L80E with D3 Brake/4WD.
    2023 Durango Hellcat

  4. #4
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    Thanks. That makes sense for question 1. Now to work on the other issue.
    2007 Corvette C6 Vert. A6
    LME LS402, Pat G custom cam, ATI 10% OD Damper
    Circle D triple disc 2600, 3.42 Diff
    YSI, 3.0 pulley, ID 1000's
    Alky Control Meth,
    ARH 1 7/8 headers,
    1009 RWHP @ 7000, 817 RWT @ 6000