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Thread: Traction Control Tuning

  1. #11
    Junior Member NERDPWR's Avatar
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    So looking forward to giving it a go... No just the spot to get this up to scratch...

    BTW.. They Anti Hoon Legislation here in WA has a couple of tricks up its sleeve.. "Testing a vehicles performance on a public road" "Undue and Excessive acceleration".. Seriously what has the world come to...

  2. #12
    Lifetime Member Highlander's Avatar
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    I still fail to see the input speed... and I am still wondering how does the electronic throttle control kicks in... I wish there was a way to control the ETC a bit more.
    "All that is needed for the triumph of evil is that good men do nothing..."

  3. #13
    Lifetime Member swingtan's Avatar
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    Well, no logs this evening. It rained so there wasn't too much use.

    Highlander, what "input speed" are you talking about?

    I'm using an E38 controller so the tables are probably different if you are using a different controller.

  4. #14
    Lifetime Member Highlander's Avatar
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    "All that is needed for the triumph of evil is that good men do nothing..."

  5. #15
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    Quote Originally Posted by Highlander View Post
    how did you get on with this in the end?

  6. #16
    Lifetime Member Highlander's Avatar
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    Well... Never got around to testing this. There are a couple of parameters I changed, but I seemed to still have too much interference. As soon as I have my car back I will test it with road runner.
    "All that is needed for the triumph of evil is that good men do nothing..."

  7. #17
    Lifetime Member swingtan's Avatar
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    I'd forgotten all about this thread. Here's some info I posted over at http://www.ls1.com.au


    Well, it's been raining here so I did some testing in a wet concrete carpark ( no, not the local shopping center ). This shows what my current TC settings will do wen there is "significant" loss of traction.



    So, we have....

    • Yellow: Shows RPM
    • Cyan: Electronic Throttle Control Throttle Position, the actual blade position
    • Green: Accelerator Pedal Position, the actual pedal position
    • Purple: Vehicle Speed Sensor


    So what is happening.....

    1. initially, ETCTP is at the idle level of about 9% and the APP is at 0%. VSS is also 0.
    2. From habit, I blip the throttle to raise the RPM ready to take off. Manual drivers of older modified cars will understand this......
    3. Clutch is released and and throttle is fed in quickly. Note that ETCTP and APP follow each other closely.
    4. the car starts to move and quickly breaks traction, VSS rises rapidly, as does RPM.
    5. At about 30kmh wheel speed ( thge car was possible doing 10kmh ) the ECM starts pulling ETCTP opening and quickly reduces it to about 30%
    6. The rate of VSS increase drops rapidly.
    7. VSS drops from a peak of about 40kmh, to actual vehicle speed of about 20kmh.
    8. As VSS approaches actual vehicle speed, the ECM commands ETCTP back up to the pedal position.
    9. This causes a break in traction again, and as VSS passes a set threshold, the ECM drops ETCTP again to control the spin.


    All this occurred in 2.5 seconds and while there was spin and TC reduced power, forward motion was not impeded that much. Remember that this was on soaked concrete, about as bad a surface as you can expect. Sure you may get a section of road covered in diesel and water, or covered in thick ice, but not much is going to help you on that.

    Simon.
    Holden VZ SS 6Lt L76 M6, 220/224 @114, 0-100kmh < 5 seconds

  8. #18
    Lifetime Member Highlander's Avatar
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    what are those settings? care to post a file?
    "All that is needed for the triumph of evil is that good men do nothing..."

  9. #19
    Lifetime Member swingtan's Avatar
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    The basic settings are.....
    • All torque reduction control setting are set to off, except for B0517
    • B0517: TCS Torque Reduction By Thrttle Option - is set to Yes.
    • B2501: TCS Maximum Engine Torque - is set to a value over the expected peak torque. In mine it's 700 Nm
    • B2502: TCS Minimum Engine Torque - is set to the least amount of torque wanted. Mine is set to 80 Nm
    • B2503: Delivered Torque Upper Duty Cycle - set hi, 90% for me.
    • B2504: Delivered Torque Lower Duty Cycle - set medium, 35% for me. I think this helps set the control of the torque delivery when TCS is active.
    • B2514: TCS Throttle Limiter By Gear - All maxed out.
    • B2517: TCS Throttle Limiter By Input Speed -This is where it all happens. Set torque limits for each gear and RPM to suit the traction expected. The real work is done in 1st and 2nd gear. Here are my settings....
      1st Gear
      • 147.625000
      • 157.500000
      • 168.500000
      • 183.250000
      • 220.000000
      • 273.500000
      • 325.625000
      • 399.375000
      • 700.000000


      2nd Gear
      • 162.750000
      • 173.875000
      • 189.875000
      • 215.250000
      • 258.125000
      • 314.875000
      • 388.375000
      • 480.500000
      • 700.000000
      3rd and 4th are just higher settings again.
    • B2522:Torque Reduction Max - I have this set to 100 Nm


    Now, with these settings and TCS turned on ( I.E. I haven't turned it off ) taking off hard on good dry bitumen has virtually no "detectable" wheel spin when sitting in the drivers seat. You can also feel the torque management release as you go through 3000 RPM. If you check the log data though, you can see around 5 to 10 kmh of wheel spin. So there is plenty of power getting to the rear wheels, just not enough to really light up the tires.

    Simon.
    Holden VZ SS 6Lt L76 M6, 220/224 @114, 0-100kmh < 5 seconds

  10. #20
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    Quote Originally Posted by swingtan View Post
    The basic settings are.....
    • All torque reduction control setting are set to off, except for B0517
    • B0517: TCS Torque Reduction By Thrttle Option - is set to Yes.
    • B2501: TCS Maximum Engine Torque - is set to a value over the expected peak torque. In mine it's 700 Nm
    • B2502: TCS Minimum Engine Torque - is set to the least amount of torque wanted. Mine is set to 80 Nm
    • B2503: Delivered Torque Upper Duty Cycle - set hi, 90% for me.
    • B2504: Delivered Torque Lower Duty Cycle - set medium, 35% for me. I think this helps set the control of the torque delivery when TCS is active.
    • B2514: TCS Throttle Limiter By Gear - All maxed out.
    • B2517: TCS Throttle Limiter By Input Speed -This is where it all happens. Set torque limits for each gear and RPM to suit the traction expected. The real work is done in 1st and 2nd gear. Here are my settings....
      1st Gear
      • 147.625000
      • 157.500000
      • 168.500000
      • 183.250000
      • 220.000000
      • 273.500000
      • 325.625000
      • 399.375000
      • 700.000000


      2nd Gear
      • 162.750000
      • 173.875000
      • 189.875000
      • 215.250000
      • 258.125000
      • 314.875000
      • 388.375000
      • 480.500000
      • 700.000000
      3rd and 4th are just higher settings again.
    • B2522:Torque Reduction Max - I have this set to 100 Nm


    Now, with these settings and TCS turned on ( I.E. I haven't turned it off ) taking off hard on good dry bitumen has virtually no "detectable" wheel spin when sitting in the drivers seat. You can also feel the torque management release as you go through 3000 RPM. If you check the log data though, you can see around 5 to 10 kmh of wheel spin. So there is plenty of power getting to the rear wheels, just not enough to really light up the tires.

    Simon.
    These settings seemed to liven up my car.

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