engine PORSCHE 911 CARRERA 2011 6.G Information Manual

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Switchbacks, hairpins, zigzags, S-bends...
There are countless reasons for having intelligent all-wheel drive.
The new 911 Carrera 4S.
Steadfastness. Another apparent Porsche
contradiction. But whilst it ’s true that
sports cars are all about movement, about
surging forwards, it ’s even more impor­
tant to stay calm at all times, to act with
composure and never rashly. So it ’s re ­
assuring that you can rely on the handling
characteristics of the new 911 Carrera 4S.
Particularly dependable is the enhanced
Porsche Traction Management (PTM)
active all­wheel­drive system, especially
when driving the car at the limits of per­
formance. To achieve this, our engineers
have travelled right to the physical
boundaries – and extended them.
PTM now ensures that the car is even
more poised and balanced and really
comes into its own when adopting
a sport y driving st yle or travelling in
extreme weather conditions.
At the rear, the car is the personification
of road holding, with its 44 mm wider
body, wider track and road­hugging
305 mm wide rear wheels. The seamless
horizontal taillight strip continues the
same st yling language. The all­wheel­
drive model is also recognisable from the
front thanks to its dynamically accentuat­
ed cooling air intakes in the front end. Though the car is practically at one with
the ground, it cannot keep still. This is
unsurprising when it is powered by a
3.8­litre engine developing 294 kW
(400 hp) at 7,400 rpm. When combined
with Porsche Doppelkupplung (PDK),
this power unit can accelerate the car to
62 mph in just 4.3 seconds. And contin­
ue up to a maximum speed of 184 mph.
This hasn’t come at the expense of fuel
consumption and CO
2 emissions either.
Figures for the new 911 Carrera 4S are
up to 13 % lower than those of its prede­
cessor. Fuel­efficient technologies, such
as electrical system recuperation, auto
start /stop – both fit ted as standard – and
the ‘coasting’ function of PDK, prove that
Porsche is continually resolving conflict­
ing aims through Intelligent Performance.
Where safety is concerned, the mono­
bloc fixed brake calipers at the front
have six pistons instead of four, whilst
the brake pads are 10 % larger. The
result is even shorter braking distances.
Proof that, at Porsche, safet y is an
integral part of performance, not its
polar opposite.
Steadfast through and through.
Corner after corner.
For fuel consumption and CO
2 emissions, please refer to pages 139/141.
Strength | The new 911 Carrera 4S

3233
engine developing 257 kW (350 hp) at
7,400 rpm, which displays superlative
performance.
The 0 to 62 mph sprint is
completed in 5.1 seconds, for example.
And it boasts a top speed of 175 mph.
Equally superlative are the fuel consump­
tion and CO
2 emissions figures which
are up to 16 % lower than those of the
previous model.
When it comes to traction, however,
composure and reason prevail in the
form of the further enhanced Porsche
Traction Management (PTM) active all­
wheel­drive system. Working together
It may come as a surprise to you, but
our engineers are very emotional people.
And clear thinkers. There is no conflict
bet ween these t wo traits. On the contrary,
they are ideal qualifications for those

tasked with the development of a cabrio ­
let that is more than just a fair­weather
car: the new 911 Carrera 4 Cabriolet.
Entirely without contradiction, it com­
bines the thrills of open­top driving with
outstanding road holding.
May we now appeal to your emotions?
Here goes. The new 9 11 Carrera 4
Cabriolet is powered by a 3.4­litre flat­six
Strength | The new 911 Carrera 4 Cabriolet
There’s a lot of emotion in engineering.
Such as that unique cornering feel.
The new 911 Carrera 4 Cabriolet.
with Porsche Stabilit y Management (PSM),
PTM ensures excellent levels of stability
and safet y. So you can give free rein to
your emotions. Even in the wet and snow.
The new hood of the
9 11 Carrera 4
Cabriolet is able to adapt to the weather
and your mood in precisely 13 seconds.
That ’s all the time it needs to open or
close at road speeds of up to 31 mph.
Magnesium support elements make the
hood light weight, yet extremely rigid and
robust. An integral wind deflector is fit ted
as standard. Electrically powered, it
extends in just t wo seconds. There’s a feeling of pride that the fabric
hood creates the same elegant silhouet te
as that of the
9 11 Coupé models. The
powerful proportions – the body that is
44 mm wider at the rear, the wider rear
track and 295 mm wide rear t yres – are
characteristic of all­wheel­drive design.
All this combines to create that unique
Porsche cornering feel.
We think that it ’s bet ter to play out your
emotions than to conceal them. Because
only a weak character shows no feelings
at all. The new
9 11 Carrera 4 Cabriolet.
For fuel consumption and CO
2 emissions, please refer to pages 139/141.

3435
Which vital ingredients do you need to
experience moments of true happiness?
It ’s our conviction, at least, that you need
impressive road holding. Plus safety,
reliabilit y and faith in technology that won’t
let you down when you need it most.
Because only when we have peace of

mind are we truly free.
All these ingredients have been brought
together in the 911 Carrera 4S Cabriolet.
The car, powered by a 3.8 ­litre direct
fuel injection (DFI) engine with a maximum
output of 294 kW (400 hp) at 7,400 rpm,
sprints from 0 to 62 mph in 4.7 seconds
and boasts a top speed of 183 mph.
Strength | The new 911 Carrera 4S Cabriolet
The strength of identity can be measured after all.
In moments of happiness.

The new 911 Carrera 4S Cabriolet.
Bringing additional peace of mind are the
fuel consumption and CO
2 emissions fig ­
ures of the new 911 Carrera 4S Cabriolet,
which are up to 14 % lower than those of
the previous model.
The car’s ‘happiness hub’, however,
can be found in the Porsche Traction
Management (PTM) active all ­wheel ­drive
control system which has undergone
further refinement. As a result, handling
is even more poised and balanced,
particularly when the car is being driven
at its limits.
This makes controlling the
car even easier
and driving much more
pleasurable.
The hood of the new 911 Carrera 4S
Cabriolet lets you open up to the open
road. The fabric hood featuring magne­
sium elements is light weight, yet robust
and extremely rigid. It opens in just
13 seconds at road speeds of up to
31 mph. When closed, it shows off an
aerodynamically optimised silhouette
that has a drag coefficient of just 0.31.
Which is also why you can hear hardly
any wind noise.
You can certainly hear the engine though.
The sound is – and remains – unmistaka ­
bly Porsche. Likewise the dimensions: the car is 44 mm wider at the rear, has

a wide track and is equipped with wide
rear wheels on 20 ­inch Carrera S t yres.
All evidence of that strong identit y.
It’s possible, of course, to describe
moments of happiness. But it ’s far bet ter
to experience them first hand. The new
911 Carrera 4S Cabriolet.
For fuel consumption and CO
2 emissions, please refer to pages 139/141.

3839
Temperament
|
Engines
To give more and take less.
That’s Porsche engineering.

Engines.
You could ask whether the sports car is
still relevant. It would be a good question,
but you might as well ask the same of
dreams.
The answer to both questions lies in the
future or, to be more precise, in the future
of the sports car. In the 911, the future
is already here. The highly efficient, state ­
of­the ­art engines make a considerable
contribution to the comparatively low fuel
consumption, but their sound is still
unmistakably Porsche. The 911 engines are also unmistakably
sport y thanks to the SPORT but ton fit ted
as standard. At the push of a but ton, the
engine becomes tuned for a sharper
response and engine dynamics that are
even more direct.
The 3.4
­litre engine of the 911 Carrera
models demonstrates, therefore, that
performance and efficiency need not be
mutually exclusive. Rather, the downsized
engine capacity and increased maximum
torque are the intelli
gent basis by which
power output can be increased in an
environmentally acceptable and sustain­
able way. Fuel consumption and CO
2
emissions have been reduced by up to
16 % compared with the previous model. In their search for improved efficiency,
our engineers analysed an extensive series
of engine components. Answers were
found, including rapid heating of the
engine and gearbox to normal operating
temperature after an engine start by the
thermal management system, improved
air induction and extremely effective
direct fuel injection (DFI).
The same principle applies to the 3.8 ­litre
engine in the 911 Carrera S models.
There has been no change in displace ­
ment since the previous model, but
power output has been increased while
fuel consumption has been reduced by
up to 15 %. Weight is critical to efficiency. This is

why the engines have a light­alloy
construction, making them lightweight
and yet structurally rigid. The result
is comparatively low fuel consumption
and a long service life.
The engine is the intelligent core of our
identit y. What else could the ‘Dr. Ing.’ in
our company name possibly stand for?
For fuel consumption and CO
2 emissions, please refer to pages 139/141.

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Temperament
|
Engines
Engine cross section: 3.8 ­litre boxer engine
911 Carrera S models: 294 kW (400 hp) at 7,400 rpm, 440 Nm at 5,600 rpm

1. High ­pressure pump
2. High ­pressure injector
3. Ignition rod module
4. Camshaft controller
5. Valve lif t adjustment switch valve
6. Switch tappet with integrated valve clearance
compensation
7. Intake camshaf t
8. Intake valves
9. Valve spring
10. Combustion chamber with Alusil cylinder liner
surface
11. Forged aluminium piston
12. Forged connecting rod
13. Crankshaft
14. Water pump
15. Air ­conditioning compressor
16. Power steering pump (in conjunction with PDCC)
17. Vibration damper
18. Alternator pulley with freewheel
19. Hydraulic belt tensioner
20. Resonance valve
21. Resonance distributor
22. Resonance valve actuator
23. Intake manifold with integrated sound chamber
24. Electronically controlled throttle valve
25. Oil filter
26. Electronic map ­controlled thermostat
27. Vacuum pump
28. Coolant jacket
29. Crankcase breather
30. Timing chain
31. S t a r t e r
911 Carrera 275 kW (350 hp) at 7,400 rpm, 390 Nm at 5,600 rpm
The 3.4-litre engine.
The 911 Carrera base models are
equipped with a 3.4 ­litre boxer engine
with direct fuel injection (DFI) and
VarioCam Plus. It develops 257 kW
(350 hp) at 7,400 rpm and the maximum
torque is 390 Nm at 5,600 rpm. For the 911 Carrera with 7
­speed manual
gearbox, this means acceleration from
0 to 62 mph in 4.8 seconds and a top
speed of 179 mph. The new 911 Carrera 4
accelerates to 0 to 62 mph in 4.9 seconds
and has a top speed of 177 mph.
For fuel consumption and CO
2 emissions, please refer to pages 139/141.
40 60 80
100 120 140 160 180 200 220 240 260
1500 75008000
2000 2500300035004000450050005500600065007000
1000
294 kW (400 hp)440 Nm
300
280
Power (kW)
T orque (Nm)
Engine speed (rpm)
200
280 300 320 340 360 380
400 420
220 240 260
460
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60 80
100 120 140 160 180 200 220 240 260
1500 75008000
2000 2500300035004000450050005500600065007000
1000
300
280
Power (kW)
T orque (Nm)
Engine speed (rpm)
200
280 300 320 340 360 380
400 420
220 240 260
460
440
257 kW (350 hp)
390 Nm
The 3.8-litre engine.
The 911 Carrera S models are powered
by a 3.8
­litre boxer engine with direct
fuel injection (DFI) and VarioCam Plus. It
produces 294 kW (400 hp) at 7,400 rpm
and the maximum torque of 440 Nm is
achieved at 5,600 rpm. With optional Porsche Doppelkupplung
(PDK), the 911 Carrera S accelerates
from 0 to 62 mph in 4.3 seconds

and achieves a top speed of 187 mph.
The new Carrera 4S completes the
0 to 62 mph sprint in 4.3 seconds and
boasts a top speed of 184 mph.

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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 ficient drive systems. The same applies
on the road. It ’s about get ting the most
out of what you’ve got.
Auto start/stop function.
The auto start/stop function is standard
in the 911 Carrera models.
In cars with the manual gearbox, the
engine switches off automatically when,
for example, you stop at traffic lights,
select neutral and release the clutch
pedal. In cars with Porsche Doppelkupplung
(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,
for example: extreme outside tempera
­
tures, when the SPORT but ton is selected
or if bat tery charge is low. It is also pos ­
sible to deactivate the function manually
using a separate but ton on the centre
console.
Thermal management.
The 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 911 Carrera models are also equipped
as standard with fuel ­saving electrical
system recuperation technology. The
vehicle bat tery is recharged by the alter ­
nator, predominantly under braking.
Under acceleration, on the other hand,
the power draw of the alternator is limited
to increase the engine output available
for driving. The electrical systems are
supplied by the electrical energy stored
during the recharging process.
Temperament | Engines
Not as thirsty as you might think.

Efficiency- enhancing measures.
For fuel consumption and CO2 emissions, please refer to pages 139/141.

4445
DFI delivers fuel directly into the combustion
chamber with millisecond precision. The
spray and cone angles of the multi­hole
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 improves 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 pages 139/141.

4647
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
controlled oil pump supplies the lubricat ­
ing points inside the engine as and
when required. When demand is low, the
oil pump is operated at reduced power,
thereby saving fuel.
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
9 11 Carrera S models operate a t wo ­
stage
system.
The entire intake system is made from
light weight plastic. In the 9 11 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 powerful at higher rpm.
Exhaust system.
The exhaust system of the 911 Carrera
models has been 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.
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
compati bility with the Porsche Stability
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 condi ­
tions, 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 pages 139/141.

4849
Temperament
|
Transmission
The long and winding road is where you’d like to be.
Sometimes, it pays to take the direct route.

Transmission.
The 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 pages 139/141.

462135
7R
5051
Porsche Doppelkupplung (PDK).
Available as an option for all 911 Carrera
models is 7­speed PDK, featuring
manual and automatic modes. It facili ­
tates extremely fast gear changes
with no interruption in the flow of power,
whilst at the same time improving
acceleration and fuel efficiency. In total, PDK has seven gears at its dis
­
posal. 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.
PDK is essentially t wo gearboxes in one
and thus requires t wo clutches. This
double ­clutch arrangement provides an
Porsche Doppelkupplung (PDK)
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.The effect is instant. Driving feels even
sportier and more dynamic, and agility

is increased. Depending on the gearshift
programme (SPORT button activated
Temperament | Transmission
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. 67).
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 62 to 49 mph in anticipation of the
change of speed limit ahead. As soon as
you release the accelerator 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 selects the appropri
­
ate gear smoothly and seamlessly within
a fraction of a second. In short, driving in coasting mode makes
a real impact on fuel consumption without
any need for compromise on comfort or
sporty performance.
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,
PDK remains ready to respond as swiftly
and precisely as you would expect.
For fuel consumption and CO2 emissions, please refer to pages 139/141.