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Thread: 2012 Caprice L77 stage 1 TSP cam

  1. #1
    Tuner in Training
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    2012 Caprice L77 stage 1 TSP cam

    I?m looking for guidance on a tune for the caprice with this cam. So far I?ve gotten just the idle to stick and looking for guidance as far as to getting the power out of the cam along with a decent lope.

  2. #2
    Tuning Addict 5FDP's Avatar
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    Read about tuning the MAF and VVE with a wideband o2 sensor.

    Don't even think about power or lope until everything outside of power enrichment is fixed. Once fueling is spot on for part throttle, medium throttle and wide open throttle, then trying to optimize spark and power can be looked into.

    Same thing with idle and "lope". Fueling has to be fixed first so you are aren't working against yourself.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  3. #3
    Tuner in Training
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    You have any pointers on where I can find more info on how to tune the MAF and VVE? Only issue is I don?t have a wideband o2 sensor

  4. #4
    Advanced Tuner
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    There's TONS of threads about MAF and VVE tuning if you do some searching.
    JTC Performance - Authorized HP Tuners Reseller
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  5. #5
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    attach file

  6. #6

  7. #7
    Advanced Tuner
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    attach your tune

  8. #8
    Advanced Tuner
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    ant senator final 386rwhp.hpt

    see attached for LS3 auto and mild cam file.

    its in 2bar SD though so you'll have to invert the VE table data if you use it for the VVE.

    without a wideband you can use STFT to tune cruise/ light throttle. its not ideal but provides an indication.

    ideally you need a wide band. set up a good scanner config. you want to disable closed loop and put it in full time open loop. you want to tune it MAF only and gather the fuel data and edit your MAF frequency table from the logs. Then disable MAF and put it in MAF fail and use the AFR data to tune the VVE.
    then turn the MAF back on set it to dynamic calibration and enable closed loop again

  9. #9
    Tuner in Training
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    Heres my current tune


  10. #10
    Tuner in Training
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    and most recent log