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Thread: Difference in STFT's..

  1. #21
    Advanced Tuner
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    Jun 2011
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    Quote Originally Posted by mrgillies View Post
    If you have an air leak before or just after the O2's you will notice the STFT's being really erratic and not smooth curves at lower RPM's (idle - 1000 rpm), they get better (smoother) when more air flow is achieved.

    Ask me how I know.... LG Superpros have a slip on connector that passes air if not adjusted prior to install
    Thanks for the thoughts, but trust me. I have checked everything 100 times. No leaks, exhaust or vacuum.
    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. #22
    Tuner TimC's Avatar
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    Jun 2009
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    Near GR, MI
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    This is common on the STS-V as well. I see variations up to 10 percentage points all the time. It happens mainly cruising. Under WOT the variation in narrow bands is 0-15 mV.
    1971 Corvette-LS3 swap with custom cam. Stainless headers and sheet metal intake built by the owner. 442rwhp.

    2007 STS-V-Billet Precision 67mm turbo swap. 563rwhp@15psi.

    1991 Camaro-6.0 swap with LS6 heads and custom cam. Headers and other swap bits fabricated by myself (wife's car)