2009 PORSCHE 911 air condition

Expansion intake manifold.
More power for less fuel. What
sounds absurd is sometimes
quite simple. You just have to
have the nerve to question
prin ciples that are seemingly
writ ten in stone.
The 911 Turbo and 911 Turbo S
models have an innovative expan -
sion intake manifold that was
used for the first time on the latest
911 GT2. Its unique operating
principle is unlike any thing ever
featured on existing induction
systems. Our ‘expansion’ intake
manifold is a radical development
that is the polar opposite of the
resonance principle used on con -
ventional turbocharged engines.
A resonance manifold increases
engine output by forcing addi
tional
air into the combustion chambers.
To do this, the manifold is designed
in such a way that the air – which
vibrates due to the action of the
valves – is in a compression phase
as it passes through the inlet ports.
Unfortunately, compression not
only increases air volume, it
also increases air temperature
and this has a negative effect
on ignition.
Our expansion manifold simply
turns that principle around. The
internal geometry is radically
different from that on a resonance
intake system. Key modifications
include a longer distributor pipe,
with a smaller diameter, and
shorter intake pipes. As a result,
the air is in the expansion phase
as it enters the combustion

chambers. Since expansion always
cools, the air/fuel temperature is
lower and ignition is significantly
improved – thereby increasing
performance.
Of course, the amount of air that
enters the engine under expan -
sion is less than it would be under
compression. To compensate
for this, we’ve simply increased
the boost pressure. The resulting
increase in temperature – again
through compression – is immedi -
ately offset by the uprated inter -
coolers. Instead of hot compressed air
entering the combustion

chambers, we now have cooler

air generating more power and
torque. As a consequence, there
is a major improvement in engine
efficiency and therefore lower fuel
consumption even under heav y
loads and at high revs.
As we said, sometimes you just
have to question established
ideas.
Exhaust system.
The exhaust system is made
from stainless steel. Its cataly tic
converters are extremely heat-
resistant, yet quick to reach
temperature – and thus optimum
performance – when the engine
is started from cold.
Advanced exhaust gas technology
ensures compliance with stringent
emissions standards, e.g. Euro 5
in EU markets, LEV II/ LEV in the
USA.
Servicing.
The 911 Turbo and 911 Turbo S
models are designed for a long
life. A self-adjusting belt drives
the generator, power-steering
pump and air-conditioning com -
pressor. Valve clearances are
adjusted hydraulically, thus avoid -
ing the need for any adjustment
work. The camshafts are driven
by timing chains that require
no maintenance and the ignition
system, with the exception of
the spark plugs, is also mainte -
nance-free. The cars come with
a t wo -year unlimited mileage
w a r ra n t y.
The long service intervals (see
separate price list) keep costs
and labour times down and save
resources, since fewer service
products and consumable parts
are used.
Performance | Engine
911 Turbo engine and exhaust system
· 40 ·· 41 ·

The second function is the
‘motorsport-derived gearshift
strategy’. Using this, Porsche
Doppel
kupplung (PDK) is geared
up for the shortest possible
shif t times and optimum shif t
points for maximum acceleration
– ideal for the racetrack.
A key component of the Sport
Chrono Package Turbo with
dynamic engine mount system is
the stopwatch mounted on the
dashboard. Porsche Communica -
tion Management (PCM, page 86)
has a special performance display
to view, store and evaluate lap
times or other driving times. It
shows the total driving time, lap
distance, lap number and the
lap times recorded so far. You can
view the current fastest lap and
the remaining range until empt y.
Travelled distances can be
recorded and benchmark times
defined. The personal memory function of
the Sport Chrono Package Turbo
can also be used to store person
-
alised set tings for a range of
systems, including the orientation
lighting or air conditioning.
Operation of the dynamic
engine mount system.
Stiffness and softness as required.
That ’s the principle behind the
dynamic engine mount system
now being of fered for the first
time as part of the Sport Chrono
Package Turbo. Essentially, it ’s an
electronically controlled system
for controlling the stif fness of the
engine mounts.
The engine is bolted to the body
using t wo mounts and follows
New ton’s law of inertia, namely
that a body will continue to move
in a uniform straight line unless it is made to change its direction
by a force acting upon it.
Put more simply: when you are
driving into a bend, the vehicle will
follow your steering but, at first,
the mass of the engine won’t. This
means that the rear of the vehicle
is pushed out wards because of
the inert forces from the engine’s
mass acting on it.
The dynamic engine mount

system minimises this effect.
The steering angle longitudinal
and lateral acceleration values
are constantly recorded by
sensors and the stif fness of the
t wo engine mounts is changed
automatically according to the
driving st yle. This is achieved
using a magnetisable (magneto -
rheological) fluid and an electri -
cally generated magnetic field.
The magnetisable particles align
with each other and the fluid’s viscosit y changes. This alters the
stif fness and absorption of the
engine mounts: sof ter for greater
comfort and less vibration when
driving normally, harder for a
more direct driving feel when

driving more sportily.
The dynamic engine mount

system also reduces the vertical
oscillations of the engine when
accelerating under full load. The
result: greater and more uniform
force on the rear axle, increased
traction and bet ter acceleration.
All this means t wo things: percep -
tibly more stable handling under
load change conditions and in fast
corners and a step closer to the
ultimate sport y drive – combined
with enhanced levels of comfort.

Performance | Chassis
· 60 ·· 61 ·

Brakes.
On a 911 Turbo, there is one thing
above all else that both the accel-
erator and brake pedals deliver
when you press them – and that ’s
excitement.
The standard braking system of
the 911 Turbo models features
six-piston fixed calipers at the
front and four-piston fixed calipers
at the rear. The red-painted calipers have a
monobloc (one-piece) aluminium
construction of fering greater

stabilit y, bet ter ‘bite’ characteris -
tics under heav y braking and a
further reduction in unsprung
weight. The brakes are quick to
apply and release, whilst the
pedal travel is short and the bite
point precise and consistent.
The front and rear discs have a
generous diameter of 350 mm.
All four discs are cross- drilled for
bet ter performance in the wet.
The distinctive drill-hole pat tern
enables a faster response by
allowing rapid dispersal of the
water vapour generated under
braking.
The discs are also internally
vented for bet ter heat dispersal.
The result: excellent stabilit y in
all conditions. Cooling air is
directed onto the brakes to further
improve performance. A powerful
9-inch tandem brake booster unit
enables easier pedal inputs.
Braking distances are further
reduced with the aid of t wo
functions in the standard Porsche
Stabilit y Management (PSM):
electronic brake prefill and brake
assist (page 57). The new 911 Turbo S models
come equipped with the Porsche
Ceramic Composite Brake (PCCB,
see following pages) as standard.
Standard front brake (911 Turbo)
Responsibility
| Safet y
· 66 ·· 67 ·

Interior.
Efficient ergonomics is the guid-
ing theme for the interior. The
steering wheel of fers 40 mm of
adjustment for both height and
reach. A multifunction steering
wheel – with or without steering
wheel heating – is available on
request. The distinctively designed gear lever (for the six-
speed manual gearbox) and PDK
gear selector are easy to operate.
Porsche Communication Manage
-
ment (PCM) with a touchscreen is
fit ted as standard, as is the inte -
gral GPS navigation module with
hard drive navigation (page 86).
The new 911 Turbo S models come equipped with an integrated
six- disc CD/ DVD autochanger

and cruise control as standard.
The air- conditioning system with
an active carbon filter is fully
automatic. The leather finish on the seats,
dashboard, doors and rear
side panels is pleasing to the
touch. Available exclusively for
911 Turbo S models as standard
is the choice of t wo -tone leather
interior in either Black and Cream
or Black and Titanium Blue.
The centre console and door
storage compartments provide
storage space for personal items.
Below the passenger airbag are
t wo cup holders and below these
is the glove compartment with
CD storage.
Two 12-volt sockets (including the
cigaret te lighter) provide power
for a range of electrical devices.
Instruments.

The classic Porsche grouping of
five round instruments offers a
clear overview of all key informa -
tion.
The digital display in the centre-
left dial (speedometer) provides
main and trip odometer readings.
The central rev counter, featuring
the ‘turbo’ ‘or turbo S’ logo,
includes the standard on-board
computer display. This multi -
pur
pose field contains a perma -
nent digital speedometer as well
as the upshif t display on manual
models. The following optional information can also be displayed:
boost pressure, average speed,
average fuel consumption, t yre
pressure, current radio station,
navigation instructions and
remaining range till empt y. When
‘Sport ’ mode is selected on

the Sport Chrono Package Turbo
in a 911 Turbo model equipped
with dynamic engine mount
system, the temporary increase
in maximum torque is clearly
indicated by an arrow symbol in
the boost pressure display.
The third display, in the centre-
right dial, shows the time and
outside temperature.
Why do you need huge gestures
when the signs are clear?
Comfort.
An expressive design.
Well conceived technology.

A consistently sporty style.
No gimmicks. Why should the
rules for performance be
any different for the interior?
Personality | Comfort
Instruments in the 911 Turbo with PDK
Interior of the 911 Turbo in natural leather Carrera Red
· 80 ·· 81 ·

Index
Option Page
A
Air conditioning 81
A irbags 71
All-wheel drive 48
Aluminium Look 101
Anti-theft protection 84
Audio interface 88
Audio system 86
A xle concept 52
B
Bodyshell structure 70
BOSE
® Surround Sound
System 88
Brakes 66
C
Cabriolet 22
Carbon 101
CD/ DVD autochanger 86
Ceramic brake 68
Chassis 52
Child seats 83
Colours, exterior 92
Colours, hood 93
Cruise control 85
D
Design 16
Direct fuel injection (DFI) 32
Dry-sump lubrication 33
Dynamic cornering lights 65
Dynamic engine mount
system 60
E
Electronic engine
management 38
Engine 30
Engine management 38
Environment 74
Exhaust emission control 75
Exhaust gas turbocharging 36
Exhaust system 41
Expansion intake manifold 40
Exterior 16
Exterior mirrors 84
F
Factory collection 97
Fuel system 76
G
Glass rear screen 24
GPS navigation system 86
H
Hardtop 25, 99
Headlight cleaning system 64
Headlights 64
HomeLink
®
(garage door opener) 84
Hood 24
I
I numbers 98
Ignition 39
Instruments 81
Interior 80
L
Launch Control 59
Lighting 65
Lighting system 64
Light weight design 34
Luggage compartment 84
M
Manual gearbox 46
Model range 18
MP3 88
Multifunction steering wheel 44
N
Navigation 86
O
Oil supply 33
On-board computer 81
P
Pa rk A ssist 85
Personalisation 90
Porsche Active Suspension
Management (PASM) 53
Porsche Ceramic Composite
Brake (PCCB) 68
Porsche Communication
Management (PCM) 86
Porsche Doppelkupplung
(PDK) 42Porsche Side Impact

Protection System (POSIP) 72
Porsche Stabilit y
Management (PSM) 56
Porsche Torque Vectoring
(PT V) 50
Porsche Traction
Management (PTM) 48
Power and performance 110, 112
Power steering 54
R
Radio 86
Recycling 76
Roll-over protection 72
Roof transport system 84
S
Safet y 64
Seats 82
S e rv ic i n g 41
SPORT but ton 58
Sport Chrono Package Turbo 58
Steering 54
Steering wheels 44
T
Technical data 110
Touchscreen 86
Transmission 42
T V tuner 87
Tyre Pressure
Monitoring (TPM) 55
U
Universal audio interface 88
V
Variable Turbine Geometry
(V TG) 36
VarioCam Plus 38
Vehicle tracking system 84
Voice control system 87
W
Wheels 54
Wind deflector 25
Wood, macassar 101
Index
· 114 ·· 115 ·