Porsche 911 GT2 Brochure page 24

It's good to know who's in control.
Porsche Stability Management (PSM).
Some things never change, for the 911 GT2. In addition to
including driver expectations of ABS, the package includes two
a 911 GT2: sports-oriented automatic driver aids: stability
performance, a direct response control (SC) and traction control
and impressive power. (TC).
So Porsche Stability Management Stability control (SC), which is
(PSM) has been specially adapted responsible for lateral dynamics,
uses a range of sensors to moni-
tor the direction, speed, yaw
velocity (speed of rotation around
the vertical axis) and lateral
acceleration of the car. Using
this information, it is possible to
calculate the actual direction of
travel at any given moment. If the
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handling under acceleration on
surfaces with inconsistent grip.
It also prevents the rear from
'stepping out' if a wheel loses
traction under full power. The
trigger threshold is relatively high,
which means it is rarely employed
in normal dry conditions.
A unique feature of PSM on
the 911 GT2 is that the control
interventions are delayed and
can be disabled completely in
two stages – for deliberate per-
formance handling.
Stage 1 disables the stability con-
trol (SC) via the 'SC OFF' switch in
the centre console. In 'SC OFF'
car begins to oversteer or under- mode, the control system does
steer, selective braking is applied not intervene if the car goes off-
on individual wheels to restore con- course in the lateral direction,
trol in critical driving scenarios. which means the throttle can
be used to help steer the car.
Traction control (TC), with its Traction control (TC) is still active
integrated ABD (automatic brake in this mode.
differential), ASR (anti-slip regula-
tion) and EDC (engine drag-torque Stage 2 disables the traction con-
control) functions, is responsible trol as well via the separate
for the longitudinal dynamics of the 'SC+TC OFF' switch, giving the
car. Configured for sports-oriented driver full command of the vehi-
driving, traction control improves cle. Another unique feature
The 911 GT2 |
is the fact that stability control
remains disabled in stages 1 and
2 even when the ABS is required
under braking. Specially develop-
ed for the 911 GT2, this revised
system strategy means the car
can also be enjoyed to maximum
effect on the racetrack.
The anti-lock braking system
(ABS 8.0) is integrated in PSM
and remains active, irrespective
of which settings have been
selected. ABS ensures a relatively
short braking distance and thus
enhanced safety.
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Chassis