The 911 | Chassis
Two different modes.
One driving feel: 911.
Porsche Active Suspension Management (PASM).
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.
At the push of a button, 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 comfort-
able than the standard chassis of
models with the 3.6-litre engine.
The PASM control unit evaluates
the driving conditions and modi-
fies 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.
PASM sports chassis with
mechanically locking rear
differential.
The PASM sports chassis is
available as an option for Coupé
models and only in conjunction
with 19-inch wheels.
The body is 20 mm lower than
the standard suspension of the
3.6-litre engine models, and
10 mm lower than 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 a
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 inter-
venes less often.
Rebound in ‘Normal’ mode –
working piston and bypass,
sporty-comfortable tuning
Compression in ‘Normal’ mode –
working piston and bypass,
sporty-comfortable tuning
Rebound in ‘Sport’ mode –
working piston only, sporty-hard
tuning
Compression in ’Sport’ mode –
working piston only, sporty-hard
tuning
