boldstep

hi guys

I tried researching this but didn't get anything definitive. What is the difference in stability control between the 997.1 gt3 and 997.2 gt3?
thanks

Fisher

There has been considerable confusion about GT3 nanny systems. PASM on a 7.1 is not the same as PSM on a 7.2. Maybe you could get someone familiar with the 7.2 to explain PSM.

Speaking only of the 7.1:

The 'Sport' button on the center console is a separate system and has to do with the selection of a more sensitive computer throttle response and the opening of exhaust valves at idle and above 4K RPM.

The button to the left of the Sport button is labeled with a shock absorber symbol and controls whether you are in Normal or Sport PASM. According to official documents, Porsche Active Suspension Management (PASM) is an active damping system that offers continuous adjustment of individual damping forces based on current road conditions and driving style. If 'Sport' mode is selected, the suspension is automatically set to a harder damper rating. If the quality of the track surface falls below a certain threshold, the system immediately changes to a soft rating within the 'Sport' setup range. When the quality improves, PASM automatically returns to the harder rating.

Traction Control (TC), the button to the far right, is derived from the Carrera GT. It combines ABD, ASR and MSR functionality. Specifically configured for optimum sports performance, the benefits of Traction Control include a reduction in wheelspin under full acceleration which could otherwise destabilise the rear of the car. The standard trigger threshold is purposely so high that it is rarely exceeded during normal road driving in the dry. It is possible to raise the threshold higher still by pressing the 'Sport' button on the center console. For maximum involvement, the system can be fully disabled using the separate 'TC OFF' switch.

I hope you detected the nuances of the switch labeling and functioning. Like when the TC button is lit, TC is OFF. Also, the button labeled 'Sport' does not select the Sport PASM Mode, rather the button to its left does. In the description of TC by Porsche, where they say "pressing the 'Sport' button on the center console," I am certain they mean the button marked with a shock absorber (PASM Sport) rather than the button marked 'Sport'.

Confused enough yet?

This is maybe half the reason why there is trouble getting "anything definitive."

757driver

I was under the impression the 7.1 didn't have stability control. It only became available on the 7.2 cars. Both gens have traction control however.

MJSpeed

997.1 No stability control. It does have Porsche's Active Suspension (PASM) which doesn't do much more than stiffen the dampers. It also has traction control.

997.2 Has Porsche's Stability Managem (PSM), Porsche's Active Suspension PASM, and traction control.

On both the TC can be turned off and the sport button is for exhaust valves and throttle response.

Spyerx

Guys the 997.1 do have traction control, they do not have stability control.

The TC on these cars basically: cuts power to rear wheels under slip conditions. maybe it brakes them too, dunno.

I turn it off, slows you down on the track and the only thing it'll save you with is power on over steer.

Fisher

More confusion on definitions:
https://www.google.com/url?sa=t&rct=...52479541,d.cGc