2015 PORSCHE 911 CARRERA 4S Information Manual

Drive 49
7-speed manual transmission.
Pure, direct, precise. Short shift
movements and an optimum transition
from one gear to the next. The 7-speed
manual transmission combines a high
level of sport y performance with fast
gear changes. In conjunction with the
optional Sport Chrono Package, selecting
SPORT or SPORT PLUS mode activates
the dynamic
throttle-blip function, which
ensures the optimum engine speed for
every downshift, a more emotional
driving experience and an impressive
sound.
A gear indicator in the rev counter
reminds you which gear has been
selected. The upshift indicator in the
instrument cluster helps you actively to
conserve fuel.
Porsche Doppelkupplung (PDK).
The optimised 7-speed PDK, featuring
both a manual and an automatic mode, is
available as an option and offers extremely
fast gear changes with no interruption in
the flow of power. And that ’s with even
faster acceleration performance and a
further reduction in fuel consumption.
A first for the 911
models: in manual
mode, the shift direction simulates that
of racing cars and the 911
GT3 models –
to the rear to shift up, forwards to shift
down. For a racetrack driving experience
wherever you are. Gears one to six have a sports ratio, with
top speed being reached in sixth gear.
Seventh gear is ratioed primarily for fuel
economy.
PDK is essentially t wo gearboxes in one.
This double-clutch arrangement provides
an alternating, non-positive connection
bet ween the t wo half gearboxes and the
engine by means of t wo separate input
shafts. The flow of power from the
engine is transmit ted through one half
gearbox and one clutch at a time, while
the next gear is preselected in the
second half gearbox. During a gear
change, therefore, one clutch simply
opens and the other closes at the same
time, enabling gear changes to take
place within milliseconds.
Always a few milliseconds ahead of time.
Transmission.
1
7-speed manual transmission
2 Porsche Doppelkupplung (PDK)

Drive 51
The essential feature of all 911 all-wheel
drive models: enhanced Porsche Traction
Management (PTM).
Derived from the 911
 Turbo, the
electronically controlled and fully variable
multi-plate clutch distributes drive force
between the permanently driven rear
axle and the front axle even faster and
more precisely than ever before.
The driving state of the vehicle is
continuously monitored so that it is
possible to respond to different driving
situations. Sensors are used to collect a
range of data, including the rotational speed of all four wheels, the lateral and
longitudinal acceleration of the car and
the current steering angle.
If, for example, the rear wheels threaten
to spin under acceleration, a greater
proportion of drive force is transmit ted
to the front by a more powerful
engagement of the multi-plate clutch.
In this way, PTM, working in conjunction
with Porsche Stabilit y Management
(PSM), always ensures the appropriate
distribution of force necessary for
excellent driving performance and
particularly well-balanced handling at

the limit.
Drizzle, snow, leaves, sun.
Perfect weather for some sports action.
Porsche Traction Management (PTM).

Porsche Torque Vectoring (PTV) and
Porsche Torque Vectoring Plus (PTV Plus).
PTV (with manual transmission) or PTV Plus
(with PDK) is available as standard in
the S models and as an option for the
911 Carrera 4 models and the 911 Targa 4.
Both systems actively enhance vehicle
dynamics and stability. Operating in conjunction with a rear differential lock,
they work by intelligently braking the
rear wheels as the situation demands.

When the car is driven assertively
into a corner, moderate brake pressure
is applied to the inside rear wheel.
Consequently, a greater amount of drive force is distributed to the outside rear
wheel, inducing an additional rotational
pulse (yaw movement) around the
vehicle’s vertical axis. This results in
a direct and sport y steering action
from the turn-in point.
With PTV, the rear differential lock is
regulated mechanically, while PTV Plus is
equipped with electronic control offering
fully variable torque distribution. In
interaction with Porsche Stability
Management (PSM), the system improves

Drive 53
driving stability not least on road surfaces
with varying grip as well as in the wet
and snow.
For the driver, this means strong
resistance to destabilising side forces,
outstanding traction and great agility at every speed – with precise turn-in and
well-balanced load transfer characteristics.
What else? Tremendous fun in the corners.

Chassis

Porsche Active Suspension Management
(PASM).
PASM is fit ted as standard in all 911
models for the first time. This electronic
damping control system continuously
adjusts the damping force on each
wheel, based on current road conditions
and driving style. PASM has two modes, which can be
selected using a separate but ton on the centre console: ‘Normal’, which is a blend
of performance and comfort, and ‘Sport ’
where the setup is much firmer.
The results are tangible: increased
driving stability, improved comfort and
enhanced performance.
The road to the future has its ups and downs.
And its fair share of twists and turns.
Chassis.