2011 PORSCHE 911 CARRERA fuel

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A widely held belief about motorsport is
that power is the only thing that mat ters.
From experience, we know bet ter. Extra
horsepower alone has never been enough
to win a single race. Much more important
to us are ideas – ideas that inspire more
intelligent vehicle concepts and more ef fi-
cient drive systems. The same applies on
the road. It ’s about get ting the most out
of what you’ve got. select neutral and release the clutch
pedal. In cars with Porsche Doppel
kupplung
(PDK), the engine switches off whenever
you stop and leave your foot on the
brake pedal.
All audio and communication systems
remain switched on and the climate con -
trol continues to maintain your selected
temperature. The only differences you
will notice are the silence at the rear and
the fuel saving. As soon as you operate
the clutch or release the brake, the
engine will restart swiftly and smoothly.
The auto start/stop function may remain
inactive under particular circumstances,
extreme outside temperatures, when the
SPORT but ton is selected or if bat tery
charge is low. It is also possible to deacti -
vate the function manually using a
separate but ton on the centre console.
Thermal management.
The new thermal management system
regulates the temperature in the engine
and gearbox through the intelligent
manipulation of heat flow.
In this way, the engine and gearbox reach
their optimum operating temperature
sooner. As a result, fuel consumption is
reduced through increased combustion
efficiency and lubrication performance.

Electrical system recuperation.
The new 911 models are also equipped
as standard with fuel-saving electrical
system recuperation technology.
The vehicle bat tery is recharged by the
alternator, predominantly under braking.
Under acceleration, on the other hand,
the power draw of the alternator is limit -
ed to increase the engine output availa -
ble for driving. The electrical systems
are supplied by the electrical energy
stored during the recharging process.
Temperament | Engines
Auto start/stop function.
The auto start/stop function is standard
in the new 911 models.
In cars with the manual gearbox, the
engine switches off automatically when,
for example, you stop at traffic lights,
Not as thirsty as you might think.

Efficiency- enhancing measures.
For fuel consumption and CO2 emissions please refer to page 129.

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DFI delivers fuel directly into the combustion
chamber with millisecond precision. The
spray and cone angles of the new multi-
hole injectors have been optimised for
torque, power output, fuel consumption,
emissions and ef ficient combustion.
With direct injection, the engine manage-
ment system regulates injection timing
individually for each cylinder as well as
the injection rate for each cylinder bank.
This optimises the combustion process
and fuel economy. operation to the prevailing conditions.
This results in instant acceleration,
extremely smooth running and an
extraordinary level of tractive power,

but with a comparatively low level of
fuel consumption.
For faster heating of the catalytic converters
after a cold start and optimum torque in
the upper load range, up to three injection
pulses take place per combustion cycle.
DFI improves the internal cooling of

the combustion chamber by having the
mixture prepared directly in the cylinder.
This allows for a higher compression
ratio, which helps to deliver more output
at the same time as enhanced engine
efficiency. Injection is regulated by the
electronic engine management system
and emissions are monitored by the
Lambda sensors.
Temperament | Engines
VarioCam Plus System.
VarioCam Plus is a two-in-one engine
concept for adjusting the intake
camshafts and switching the lift of the
intake valves.
The system first dif ferentiates bet ween
driver inputs that typify normal,
everyday driving and those inputs
that demand maximum performance.
The electronic engine management
system then seamlessly adapts valve
What lies between your home and Le Mans?
Advanced engineering as standard.

Direct fuel injection (DFI).
For fuel consumption and CO2 emissions please refer to page 129.

3839
Temperament
|
Engines
Integrated dry-sump lubrication.
Integrated dr y-sump lubrication ensures
a reliable supply of oil even when a
sport y driving st yle is adopted. It also
has additional cooling functions.
The oil tank is located in the engine,
thereby eliminating the need for an
external oil tank, which saves both space
and weight. To reduce power loss and
increase efficiency, an electronically con -
trolled oil pump supplies the lubricating
points inside the engine as and when
required. This results in optimum supply
of oil, low fuel consumption and, there -
fore, lower exhaust emissions.
Air intake system.
The resonance intake system increases
the intake volume by exploiting the fact
that air oscillates as it passes through
the intake manifold. The system can
adjust to engine speed. Benefits of this
include higher torque at low engine
speeds and a flat ter torque curve.
The
911 Carrera S models operate a t wo -
stage
system.
The entire intake system is made from
light weight plastic. In the new 911 Carrera
model range, the resonator volume of the
air filter housing varies with engine speed
to bring added character to the engine
sound, which becomes much more power -
ful at higher rpm.
Exhaust system.
The exhaust system of the new 911
models has been completely redesigned,
acoustics included.
The stainless-steel exhaust system com -
prises t wo distinctive and independent
exhaust tracts. The cataly tic converters
heat up rapidly for effective emissions
reduction.
A selectable t win -tube sports exhaust
system featuring distinctive polished
stainless-steel tailpipes is available as an
option. Activated by a but ton, it produces
an even more intensive sports car sound.
911 Carrera S with sports exhaust system
Engine management system.
The EMS SDI 9.1 engine management
system ensures optimum engine perfor -
mance at all times.
It controls, for example, the position
of the electronic throt tle valve (ETC) –
a prerequisite for compatibility with the Porsche Stabilit y Management (PSM),
which comes as standard. It also regulates
all engine-related functions to achieve
optimum fuel consumption, emissions and
power output whatever the driving st yle.
Another function is the cylinder-specific
knock control. Since the cylinders never all
work under exactly the same conditions, the knock control function monitors each
one separately. The ignition point is shifted
individually, as and when necessary, to
protect the cylinders and pistons at high
engine speeds.
For compliance with EU standards, the
on - board diagnostics detect any faults
and defects that may occur in the exhaust and fuel systems and then notify the

driver immediately. This also prevents
increased pollutant emissions and
unnecessary fuel consumption.
Twin tailpipe of the sports exhaust system Single-tube tailpipe on the 911 Carrera
Twin-tube tailpipe on the 911 Carrera S
For fuel consumption and CO2 emissions please refer to page 129.

4041
Temperament
|
Transmission
The long and winding road is where you’d like to be.
Sometimes, it pays to take the direct route.

Transmission.
The new 7-speed manual gearbox.
Pure, direct, precise. Short shif t move -
ments and an optimum transition from
one gear to the next. That ’s exactly what
you would expect of a Porsche manual
gearbox.
What you might not have expected is a
7-speed manual gearbox that combines
a high level of sport y performance with
an equally high level of efficiency and
offers extra comfort for longer journeys. It’s an exceptional innovation, and not
only in the sports car segment.
The design of this manual gearbox is
based in principle on that of Porsche
Doppelkupplung (PDK). Gears 1 to 6 have
a sports ratio and top speed is reached
in 6th gear. The additional 7th gear,

however, has a long ratio, which reduces
torque and helps to reduce fuel consump -
tion. Lower engine revs at fast driving
speeds also ensure a high level of com
fort
on long stretches of road. In addition
, a gear indicator in the rev counter reminds
you which gear has been selected. The
upshift indicator in the instrument cluster
helps you actively conserve fuel.
Thanks to the elevated centre console,
the gear lever is within easy reach –

ideal for sport y gear changes.
Whether you select a sporty or comfortable
gear, the way you reach your destination
is in your own hands.
For fuel consumption and CO
2 emissions please refer to page 129.

462135
7R
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Porsche Doppelkupplung (PDK).
Available as an option for the new 911
models is 7-speed PDK, featuring manual
and automatic modes. This double - clutch
transmission has been further refined and
enables extremely fast gear changes with
no interruption in the flow of power, which vastly improves acceleration at the
same time as reducing fuel consumption.
In total, PDK has seven gears at its disposal.
Gears 1 to 6 have a sports ratio and top
speed is reached in 6th gear. 7th gear has
a long ratio and helps to reduce fuel

consumption by keeping engine revs low.
Porsche Doppelkupplung (PDK)
PDK is essentially t wo gearboxes in one
and thus requires t wo clutches. 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.
T emperament | Transmission
The effect is instant. Driving feels even
sportier and more dynamic, and agility
is increased. Depending on the gearshift
programme (SPORT button activated
or deactivated), the gear change is opti -
mised for comfort or for sport y driving.
With the optional Sport Chrono Package,
PDK is enhanced by the ‘Launch Control’
and ‘motorsport- derived gearshif t strategy’
functions (p. 58).
Coasting.
The ‘coasting’ function available with
Porsche Doppelkupplung (PDK) enables
you to save even more fuel where the
situation allows. The engine is decoupled
from the transmission to prevent
deceleration caused by engine braking.
In this way, optimum use is made of the
vehicle’s momentum, allowing it to coast
for longer distances. For example, you may want to slow down
from 100 to 80 km/ h (62 to 49 mph) in
anticipation of the change of speed limit
ahead. As soon as you release the accel-
erator pedal, PDK deselects the current
gear auto
matically and you begin to coast
in neutral until you have reached your
desired speed. The moment you engage
the accelerator or brake pedal, PDK
PDK remains ready to respond as swiftly
and precisely as you would expect.
In short, driving in coasting mode makes
a real impact on fuel consumption without
any need for compromise on comfort or
sporty performance.
selects the appropriate gear smoothly
and seamlessly within a fraction of a sec
-
ond.
Another way to reduce fuel consumption is
to utilise the coasting function on downhill
gradients that are gentle enough for you
to maintain a constant speed. Efficient on
long journeys, such as on the motorway,
For fuel consumption and CO2 emissions please refer to page 129.

4647
Temperament

| Chassis and body
Engineered design.
The new 911 fulfils two structural design
requirements thanks to its completely new
bodyshell: first, excellent driving dynamics
due to the body’s extremely high rigidit y;
second, a vehicle weight saving of up to
60 kg primarily as a result of the intelligent
lightweight construction.
To meet the second requirement,
we employed innovative and precise
techniques for combining various materials
in order to utilise specific material
properties exactly where they are needed.
For the bodyshell, therefore, we used
very thin, but nevertheless extremely
rigid, sheets of steel. Aluminium and magnesium were used extensively in
areas such as the roof, underbody, front
end, doors, rear wings and engine com
-
partment and luggage compartment lids.
Magnesium, which is a particularly light -
weight material, was also selected for
the cockpit and centre console support
beam and, in the Cabriolet models,
the hood shell elements. Such material efficiency is key to reducing the overall
weight and, as a result, fuel consumption
of the vehicle.
For the driver, this intelligent blend

of materials reduces the weight of the
vehicle and offers a high level of comfort
thanks to excellent vibration-damping
characteristics and particularly high com -
posite rigidit y, an increase in dynamic
torsional stiffness of up to 25 % compared
with that of the previous model, and
even
sportier handling despite a further
improvement in the weight to power ratio.
The 100 mm longer wheelbase improves
comfort as well as straight-line accuracy
and driving stabilit y at high speeds and in
fast corners.

Front and rear axles.
The redesigned independent suspension
at the front features a light weight spring-
strut axle with longitudinal and transverse
links and cross members that have been
refined for stiffness. Each front wheel
is precisely located, ensuring excellent directional stability, superior handling
and reduced pitching under braking, and
the wider track optimises turn-in.
The rear axle is equipped with a

motorsport-derived multi-link suspension
and chassis subframe. Refined axle kine -
matics for improved longitudinal damping
reduce acceleration squat and increase comfort. Light weight spring struts further
enhance agility.
The high proportion of aluminium used in
the construction of the axles reduces the
weight of the vehicle and of the unsprung
masses, helping to improve fuel economy,
comfort and agility.
Rear axle of the 911 Carrera S
Front axle of the 911 Carrera S
Aluminium
Deep-drawn steels
Multiphase steels
Super-high-strength micro-alloyed steels
Boron-alloyed steels

6061
Wheels.
On the new 911, the wheels have been
enlarged by one inch over the previous
model. Not only do the larger wheels
improve dynamic performance, they
also look more imposing.
The new 911 Carrera models are
equipped with 19-inch Carrera wheels as
standard. These are lightweight
alloys featuring a classic sport y design.
Tyre sizes are 235/40 ZR 19 and
285/35 ZR 19 at the front and rear
respectively.
The S models are equipped with light-
alloy 20 -inch Carrera S wheels as
standard. The visual effect is sport y and
dynamic. The t yres are slightly wider to cope with the increased power output
of these models: 245/35 ZR 20 at the
front, 295/30 ZR 20 at the rear.
The larger t yre size improves both ride
comfort and track performance. The

rolling resistance of the t yres
has been
reduced by up to 7 % to improve
fuel
economy, while t yre weight and dry brak -
ing distances have also been reduced. A selection of 20-inch wheels is available in
our range of options.
Tyre Pressure Monitoring (TPM).
Tyre Pressure Monitoring (TPM) is available
on request. This safet y system sends
warnings to the on-board computer’s
display screen in the event of low t yre
pressure or a gradual or sudden loss
of pressure. The individual pressures
in all four t yres can be displayed in the
instrument cluster.
Porsche Stability Management (PSM).
As standard, the new 911 models

are equipped with enhanced Porsche
Stabilit y Management (PSM), which
maintains stability even at the limits of
dynamic driving performance. Sensors
continuously monitor the direction,
speed, yaw velocity and lateral acceleration
of the car. Using this information, PSM is able to calculate the actual direction
of travel at any given moment. If the car
begins to oversteer or understeer, PSM
applies selective braking on individual
wheels to restore stabilit y.
Under acceleration on wet or low-grip
road surfaces, PSM improves traction
using the automatic brake differential
(ABD) and anti-slip regulation (ASR). When the SPORT PLUS mode of the
optional Sport Chrono Package is selected,
the PSM threshold is raised to allow a
sportier driving st yle.
For an even more dynamic experience,
you always have the option to deactivate
PSM. It is automatically reactivated,
for your safet y, only if you brake harder
and either of the front wheels (in SPORT
PLUS mode, both of the front wheels)
requires ABS assistance. ABS and ABD,
however, remain active at all times.
PSM therefore offers a high level of
driving stability and safety combined
with extraordinary agilit y. It ’s an
apparent contradiction in terms, but an
intrinsic part of the Porsche identit y.
19-inch Carrera wheel (standard on the 911 Carrera)
20-inch Carrera S wheel (standard on the 911 Carrera S)911 Carrera S with 20-inch Carrera Classic wheels
Temperament | Chassis and body

6869
From the start, Porsche has been
synonymous with motorsport. Ever since
1948, when we found our identit y on
the racetrack, we have taken the experi -
ence we have gained and applied it to
the road. The optional Porsche Ceramic
Composite Brake (PCCB) is a fine example.
This brake system has already had to
cope with the harshest requirements of
Composure | Safet y
motor racing and is fit ted in cars that
compete in demanding events such as
the Porsche Mobil 1 Supercup.
The cross-drilled PCCB ceramic brake
discs for the new 911 have a diameter
of 350 mm front and rear for even more
formidable braking performance.
The use of six-piston aluminium monobloc
brake calipers on the front axle and four-
piston units at the rear – all finished in
yellow – ensures extremely high brake
forces which, crucially, are exceptionally
consistent. What we’ve discovered from over 28,000 racing victories:
Brake later, finish sooner.

Porsche Ceramic Composite Brake (PCCB).PCCB enables shorter braking distances
in even the toughest road and race
conditions. Excellent fade resistance
ensures greater balance when slowing
from racetrack speeds.
The key advantage of PCCB is the
extremely low weight of the ceramic
brake discs, which are approximately
50 % lighter than standard discs of similar
design and size. As well as enhancing
performance and fuel economy, this
represents a major reduction in unsprung
and rotating masses. The consequence
of this is bet ter road holding and increased comfort, particularly on uneven
roads, as well as greater agilit y and
improved handling.
Please note that circuit racing, track

day use and other forms of performance
driving can significantly reduce the
service life of even the most durable
brake pads and discs.
As with conventional high-performance
braking systems, we recommend that
all brake components be professionally
inspected and replaced where necessary
after every track event.