Timing W/ Vec3

Discussion in 'Gen III' started by Shandon, May 8, 2007.

  1. Shandon

    Shandon Viper Owner

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    Dec 18, 2006
    Location:
    Northern Kentucky
    Has anyone here had much experience tuning with the Vec 3 system yet? Would like to see what kind of timing changes you have made on what octane gas?
     
  2. DAMN YANKEE

    DAMN YANKEE Guest

    Not a single answer in over a week? Well, thats not good!
    I have a GEN2 and will be coverng that subject for Gen2s soon in their tuning thread.
    Keep an eye out for it and let me know (PM) if you have questions.
     
  3. Flyntgr

    Flyntgr Viper Owner

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    Nov 1, 2000
    Location:
    Franklinton, LA USA
    See my thread in performance modifications. Lots of time, work and money, and the VEC3 will be removed. Your results might be better than mine, but yours could NOT be worse. I'd suggest a reflash of your stock CPM (or of a spare CPM), based on dyno runs and A/F ratios you would send to DC Performance. Without the dyno runs with A/F ratios, they would just be guessing-not good. Reflash will also get you the skip-shift elimination.
     
  4. Flyntgr

    Flyntgr Viper Owner

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    388
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    Franklinton, LA USA
    P.S. Your name is mispelled. Damnyankee is ONE word. Hehehehe. JohnnyReb.
     
  5. PowerKraus

    PowerKraus Enthusiast

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    Location:
    Texas
    On a GenII with your standard cottonKN filters and opened up exhaust (no cats) with bullets only, my ignition and fuel table adjustments are below:

    Ignition load table Fuel load table
    Volt -in_PSI Deg Volt -in_PSI ms
    0.00 -30.0 0.0 0.00 -30.0 -4.0
    0.16 -27.5 0.0 0.16 -27.5 -4.0
    0.31 -25.0 0.0 0.31 -25.0 0.0
    0.47 -22.5 0.0 0.47 -22.5 0.0
    0.63 -20.0 0.0 0.63 -20.0 0.0
    0.78 -17.5 0.0 0.78 -17.5 0.0
    0.94 -15.0 0.0 0.94 -15.0 0.0
    1.09 -12.5 0.0 1.09 -12.5 0.0
    1.25 -10.0 0.0 1.25 -10.0 0.0
    1.41 -7.5 0.0 1.41 -7.5 1.2
    1.56 -5.0 6.0 1.56 -5.0 3.2
    1.72 -2.5 6.0 1.72 -2.5 3.2
    1.88 0.0 6.0 1.88 0.0 3.2
    2.03 1.1 0.0 2.03 1.1 0.0
    Fuel rpm table Ignition rpm table
    RPM % RPM %
    000 00 000 00
    500 00 500 00
    1000 33 1000 00
    1500 63 1500 41
    2000 72 2000 52
    2500 56 2500 25
    3000 42 3000 13
    3500 31 3500 50
    4000 100 4000 100
    4500 100 4500 81
    5000 100 5000 23
    5500 100 5500 30
    6000 100 6000 00
    6500 100 6500 00
    7000 100 7000 00
    7500 00 7500 00



    I am still tuning, and have room to bump up the timing load table from 6 to a 8. Also, with the fuel table above, the injectors are basically running static. And appear to actually be a little rich, while the increased timing will burn some extra fuel, I plan to reduce the fuel load table by 1ms +/-, along with zeroing out the 1.2ms fueling at -7.5 vacuum. So far, no detonation and a seat of the pants increase from 3000 rpm and north. Further, wideband readings were perfect for NA hovering around 12.5:1

    This is with 93 pump gas here in north Texas, along with one step colder plugs. Hope that helps!
     

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