Porsche 911 GT3 RS User Handbook Manual page 44

A real paradox:
The lower the intervention, the more dynamic the drive.
Porsche Stability Management (PSM).
To contribute towards safety and
driving stability within the dynamic
range, the 911 GT3 and new
911 GT3 RS are fitted for the first
time with Porsche Stability Manage-
ment (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 calcu-
late the actual direction of travel.
If the vehicle deviates from its
course, Stability Control (SC)
might initiate selective braking on
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individual wheels to stabilise the
vehicle within the limits of its
driving dynamics.
Traction Control (TC), with its inte-
grated automatic brake differential
(ABD), anti-slip regulation (ASR)
and engine drag-torque control
(EDC), regulates the longitudinal
dynamics of the car. This sports-