To contribute towards safety and driving stability within the dynamic range, the new GT3 is fitted for the first time with Porsche Stability Management (PSM). In addition to the anti-lock braking system (ABS), it includes two automatic control systems: Stability Control (SC) and Traction Control (TC).
Stability Control (SC) stabilises the lateral dynamics using sensors which constantly monitor the vehicle’s speed, yaw velocity and lateral acceleration. From this information it is possible to calculate the actual direction of travel. If the vehicle deviates from its course, Stability Control (SC) might initiate selective braking on individual wheels to stabilise the vehicle within the limits of its driving dynamics.
Traction Control (TC), with its integrated automatic brake differential (ABD), anti-slip regulation (ASR) and engine drag-torque control (EDC), regulates the longitudinal dynamics of the car. This sports-oriented traction control improves handling when accelerating on different road surfaces. It also prevents the rear of the car from oversteering if a wheel loses traction under full power. However, the intervention threshold is relatively high, which means that it is rarely employed in normal dry conditions.
A unique feature of PSM on the new 911 GT3 is that the control interventions of both systems are delayed and can be disabled completely in two stages. This enables greater driver involvement, for example, when on the racetrack. Stage 1 disables the Stability Control (SC) via the ‘SC OFF’ switch in the centre console.
In ‘SC OFF’ mode, the system does not intervene if the car goes off-course in the lateral direction. In addition to specific steering movements, the vehicle can now also be controlled with the throttle to drive very dynamically around bends. Traction Control (TC) is still active in this mode.
Stage 2 disables Traction Control as well via the separate ‘SC+TC OFF’ switch. In this mode both lateral dynamic control and the traction control functions are deactivated. The driver now has full command of the vehicle.
In both stage 1 (SC OFF) and stage 2 (SC + TC OFF), the lateral dynamic control is not reactivated again even when there is hard braking within the ABS range. This strategy enables motorsport-derived dynamics for personalised performance on the racetrack.
The anti-lock braking system integrated in PSM (ABS 8.0) remains active in all of these settings. ABS ensures that the braking distance is as short as possible for greater safety.