The electronic adjustment of the suspension system actively and continuously regulates the damping force for each wheel according to the road conditions and driving style. In addition, the suspension is 10 mm lower. PASM is fitted as standard in the S models and is optional for models with the 3.6-litre engine.
The driver can select between two different modes: ‘Normal’ which is a blend of performance and comfort, and ‘Sport’ where the setup is much firmer. The two setup modes overlap slightly and so the balance between comfortable and uncompromisingly sporty is struck more effectively than with a conventional chassis. Depending on the mode selected, therefore, PASM is sportier or more comfortable than the standard chassis of models with the 3.6-litre engine. The PASM control unit evaluates the driving conditions and modifies the damping force on each of the wheels in accordance with the selected mode.
Sensors monitor the movement of the vehicle body, for example, under heavy acceleration and braking or on uneven roads. The control unit tunes the dampers to the optimum hardness for the selected mode to reduce roll and pitch, and increase contact between each individual wheel and the road.
In ‘Sport’ mode, the suspension is set to a harder damper rating. On uneven roads, PASM immediately switches to a softer rating within the ‘Sport’ setup range, thereby improving contact between the wheels and the road. When the road surface improves, PASM automatically reverts to the original, harder rating.
If ‘Normal’ mode is selected and the driver’s style becomes more assertive, PASM automatically switches to a harder rating within the ‘Normal’ setup range. Damping becomes harder, and driving stability and road safety are increased.
The PASM sports chassis is available as an option for Coupé models and only in conjunction with 19-inch wheels.
The suspension is 20 mm lower in comparison to the standard suspension of the 911 Carrera, and 10 mm lower compared with the PASM suspension of the S models. The springs are harder and shorter, and the lateral stabilisers on the front and rear axle are stiffer. In combination with PASM, it offers greater comfort than that of the conventional sports suspension.
The mechanically locking rear differential further enhances the traction of the driven rear wheels on uneven roads and, for example, when accelerating out of tight bends. Road holding at the limits of performance is even more predictable. The car holds its course better and so PSM intervenes less often.