TCS - what does it restrict?
 

Hi guys,

curious to know what the TCS restricts when loosing traction? Talking about when both wheels spin - not the single spin system which applies brakes.

Must cut ignition, fuel, close throttle or something else, anyone know which one(s) it does?

Regards,
Sam

Anyone know?

i can only speak for GM cars...they cut throttle to limit spin

I was thinking it couldn't be that on a car with a throttle cable. , but then it does have cruise control, so I guess it's possible?

No one knows how this works on the boxster?

Sam

I found some information, but I'm not sure how it relates to early cars without electronic throttle actuation. For one wheel slippage, the brakes are applied to that wheel. When both wheels slip, a combination of reduced throttle, fuel, and timing is used. One interesting tid-bit, one rear tire slip during deceleration ( trail throttle while turning, or a bad down-shift ) , PSM will add throttle to stabilize the car.

I have an "after sales training" pdf with lots of good information, but it's too large to attach here. I could send it to your personal email if you want.
Steve

Thanks - that sounds great. Will PM my email.

Sam

EDC...GM calls it engine drag controll

Porsche speak: Engine Drag Torque Control
Automatic Brake Differential
Automatic Slip Regulation

maybe off topic..but stephen can you or some one breakin to po,s ECM and make "adjustments" i,m close to road testing a NOS system but the auto tranny is the road block....i need to firm up and quicken shifts....i need full command of throttle....i need to wire in a "window" [rpm] switch... crank signal is ? i,ve got gm time but i,m a FNG on po ..tanks

No, I'm afraid I don't have any way to make adjustments. I'm not sure if there is any readily available method.

The early cars use a combination of brake and cutting the ignition. I forget which it does first but if that doesnt work then it goes into second phase.

chris