VEC-3 Log Jagged A/F Curve

Discussion in 'Tuning' started by TexasPettey, Dec 2, 2008.

  1. TexasPettey

    TexasPettey Viper Owner

    Posts:
    543
    Joined:
    Jul 11, 2006
    Location:
    Austin, Texas
    I've been getting a very jagged A/F curve. Lots of spikes and dips. Are these in the normal range of what others are seeing or should I suspect something in my setup or tune? It's a bit hard to tune the RPM curves when the A/F is that jagged. Here's my A/F and MAP sensor graph from a recent pull along with my tune parameters. This is for a N/A Gen1 with a good number of top end engine mods.



    [​IMG]


    --------Tables--------
    Ignition load table Fuel load table Boost load table
    Volt -in_PSI Deg Volt -in_PSI ms Volt -in_PSI %
    0.00 -29.7 0.0 0.00 -29.7 0.0 0.00 -29.7 00
    0.16 -29.7 0.0 0.16 -29.7 0.0 0.16 -29.7 00
    0.31 -22.5 0.0 0.31 -22.5 0.0 0.31 -22.5 00
    0.47 -20.2 0.0 0.47 -20.2 0.0 0.47 -20.2 00
    0.63 -17.8 0.0 0.63 -17.8 0.0 0.63 -17.8 00
    0.78 -15.4 0.0 0.78 -15.4 0.0 0.78 -15.4 00
    0.94 -13.3 0.0 0.94 -13.3 1.0 0.94 -13.3 00
    1.09 -11.0 0.0 1.09 -11.0 1.0 1.09 -11.0 00
    1.25 -8.6 2.5 1.25 -8.6 1.8 1.25 -8.6 00
    1.41 -6.2 5.0 1.41 -6.2 2.4 1.41 -6.2 00
    1.56 -3.9 5.0 1.56 -3.9 2.4 1.56 -3.9 00
    1.72 -1.8 5.0 1.72 -1.8 2.4 1.72 -1.8 00
    1.88 0.3 5.0 1.88 0.3 2.4 1.88 0.3 00
    2.03 1.5 0.0 2.03 1.5 2.4 2.03 1.5 00
    Fuel rpm table Ignition rpm table Boost rpm table
    RPM % RPM % RPM %
    000 00 000 00 000 00
    250 00 500 00 500 00
    500 00 1000 00 1000 00
    750 00 1500 00 1500 00
    1000 03 2000 00 2000 00
    1250 11 2500 00 2500 00
    1500 11 3000 09 3000 00
    1750 11 3500 19 3500 00
    2000 14 4000 50 4000 00
    2250 16 4500 50 4500 00
    2500 19 5000 19 5000 00
    2750 27 5500 09 5500 00
    3000 31 6000 00 6000 00
    3250 33 6500 00 6500 00
    3500 33 7000 00 7000 00
    3750 25 7500 00 7500 00
    4000 42 8000 00 8000 00
    4250 58 8500 00 8500 00
    4500 56 9000 00 9000 00
    4750 56 9500 00 9500 00
    5000 63 10000 00 10000 00
    5250 58
    5500 52
    5750 42
    6000 42
    6250 33
    6500 27
     
  2. TexasPettey

    TexasPettey Viper Owner

    Posts:
    543
    Joined:
    Jul 11, 2006
    Location:
    Austin, Texas
    Quick update: I am using an Innovate LC-1 with the 'response speed' set to 'instant'. I don't want to start averaging, unless that's the right answer here.
     
  3. SYNFULL

    SYNFULL Viper Owner

    Posts:
    1,041
    Joined:
    May 11, 2005
    Location:
    Bucks Co, Pa
    My roe logs look very jagged like that. Sean say's that it is normal with the vec unless you really smooth it out.
     

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