Porsche 911 - Manual (Page 35)

· 72 ·
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 com-
fortable 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 stan-
dard 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 accor-
dance 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.
Two different modes.
One driving feel: 911.
Porsche Active Suspension Management (PASM).
· 73 ·
The new 911 | Chassis
PASM sports chassis
with mechanically locking
rear differential.
The new PASM sports chassis is
available as an option for Coupé
models and only in conjunction
with 19-inch wheels.
Compression in ‘Normal’ mode –
working piston and bypass,
sporty-comfortable tuning Compression in,‘Sport’ mode –
working piston only, sporty-hard
tuning
Rebound in ‘Sport’ mode – working
piston only, sporty-hard tuning Rebound in ‘Normal’ mode –
working piston and bypass,
sporty-comfortable tuning
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 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.