Traction Control

[SV8346]

Does anyone know if its possible to edit or adjust the traction control levels in the E98? With it on it just continuously wipes out the throttle on take offs or hill climbs but if you have it turned off it just turns tires everywhere. Would be nice if it was adjustable as to the level of traction control?

[GMPX]

I'm not sure about that, do you know if the system on the Colorado uses the brakes too or purely throttle (well, fuel) control?

[SV8346]

Throttle control of some sort. So would need to be a fuel cut in someway which makes me thing that somewhere along the line it would be controllable by the ECU?

Quite possibly also has some style of brake traction control for the ESC and also when driving offroad i believe it possibly could be brake controlled?
But what i have found is that when i take off from standing start and it wheel spins it definitely feels like it fuel cut as the throttle is non responsive for a second or 2 and also boost drops to near on nil.

[SV8346]

Any luck with this yet?

[GMPX]

I was away all of last week

[SV8346]

I was away all of last week

All good, i'll check back in in a week or so and see if any update on this.

[HOWQUICK]

All good, i'll check back in in a week or so and see if any update on this.

are you just turning off traction control or ESP as well?

[SV8346]

Have tried with both. As soon as i turn off TC it turns tyres hard off the line. Would be pretty awesome to be able to take off hard without turning tyres yet still having as much power as possible to still keep traction. At the moment as soon as it starts to turn them it just basically shuts off the throttle and leaves you with a foot full of nothingness haha. Hopefully there is a way of being able to adjust the level of throttle control within the traction control. I know it can be done with the older LS1's so i was hoping(fingers crossed) it could be done with these computers as well.

[HOWQUICK]

Have tried with both. As soon as i turn off TC it turns tyres hard off the line. Would be pretty awesome to be able to take off hard without turning tyres yet still having as much power as possible to still keep traction. At the moment as soon as it starts to turn them it just basically shuts off the throttle and leaves you with a foot full of nothingness haha. Hopefully there is a way of being able to adjust the level of throttle control within the traction control. I know it can be done with the older LS1's so i was hoping(fingers crossed) it could be done with these computers as well.

It was never a tunable deal in the older LS1...all the traction control hysteresis are reactive...ie it needs to see the wheels spin before it removes power. How aggressive it is at removing power is adjustable but so is the throttle position!

Reckon you are in the world of it is a hinge not a switch...no traction control device is ever going to be able to predict the amount of slip you will get at any given set of circumstances. If you are in limited traction situations...try setting up some stuff in a DSP4 selectable calibration.

[SV8346]

It was never a tunable deal in the older LS1...all the traction control hysteresis are reactive...ie it needs to see the wheels spin before it removes power. How aggressive it is at removing power is adjustable but so is the throttle position!

Reckon you are in the world of it is a hinge not a switch...no traction control device is ever going to be able to predict the amount of slip you will get at any given set of circumstances. If you are in limited traction situations...try setting up some stuff in a DSP4 selectable calibration.

You're right it wasnt the LS1's it was the LS3's that we used to do it in.
You're also right, its not actually a prediction of traction loss but more of a calculation of traction loss due to torque produced. Its a torque limit that can be altered in specific gears at specific throttle amounts at specific rev ranges. IE; if you know that in 1st gear at 80% throttle at 1400rpms it produces 440nm of torque but at 260nm it starts to wheel spin then you can limit that specific point to 255nm of torque so that you are always right on the edge of wheel spin without actually turning tyres. See below for where we use to alter the TCS in the older ls3's


21301

[HOWQUICK]

You're right it wasnt the LS1's it was the LS3's that we used to do it in.
You're also right, its not actually a prediction of traction loss but more of a calculation of traction loss due to torque produced. Its a torque limit that can be altered in specific gears at specific throttle amounts at specific rev ranges. IE; if you know that in 1st gear at 80% throttle at 1400rpms it produces 440nm of torque but at 260nm it starts to wheel spin then you can limit that specific point to 255nm of torque so that you are always right on the edge of wheel spin without actually turning tyres. See below for where we use to alter the TCS in the older ls3's


21301

yeah naah. Do it in the throttle response tables. None of that is going to work once you mess with the torque models.

[Tre-Cool]

Have tried with both. As soon as i turn off TC it turns tyres hard off the line. Would be pretty awesome to be able to take off hard without turning tyres yet still having as much power as possible to still keep traction. At the moment as soon as it starts to turn them it just basically shuts off the throttle and leaves you with a foot full of nothingness haha. Hopefully there is a way of being able to adjust the level of throttle control within the traction control. I know it can be done with the older LS1's so i was hoping(fingers crossed) it could be done with these computers as well.

I have my power at low throttle only ramped up a bit more & as i like a nice linear pedal to power ratio, so as howquick said you need to get into your pedal demand tables and play with it.

From my own testing, I'm not impressed by the way the engine drops all power & goes all limp when a bit of wheel slip occurs either. So i did some experimenting.

Since traction is monitored via the abs system, when it sees wheel slip it will transmit to the ecu to kill power & does brakes as part of the ESP. Which is why it's annoying as shit when your in 2wd high on dirt roads. So i tested turning the traction control settings off with my other cable in the tune so that it essentially ignores the data coming from the system...

Anyway this morning we had a fairly good down pour of rain and when exiting a roundabout, i got sideways at a fairly substantial angle. enough to pucker up the old bung hole, since i wasn't expecting it. but it let me power through it. i could however still feel the abs pulsing through the steering wheel. It did this with TC/ESP not disabled.

Traction control button still works to turn off additional ESP nannies too.