display PORSCHE 911 GT2 2008 5.G Information Manual

· 37 · · 36 ·
The 911 GT2 |Drive
benefits, such as optimum econ-
omy, emissions and performance
in all driving scenarios.
One of the most important tasks
performed by the engine manage-
ment system is cylinder-specific
knock control. By preventing pre-
ignition at high engine speeds
and loads, this function can avert
costly damage to the pistons and
cylinders. Since temperatures
tend to vary across the engine,
each cylinder is monitoredseparately. If a risk is detected,
the individual ignition timing is
adjusted.
The on-board diagnostics system,
designed to European standard,
quickly detects any faults in the
exhaust and fuel system and
displays them during driving
via the car’s instruments. The
benefits include active prevention
of harmful emissions as well
as consistent rates of fuel con-
sumption.Input data Used to regulate /control
Digital engine electronics
(ME7.8.1 control unit)
Engine load
Pressure upstream from throttle
Throttle-valve angle
Engine speed (from crankshaft)
Inlet camshaft phase angle
Throttle-pedal position
Oxygen sensor signals
Knock sensor signals
Ignition
Fuel injection
Throttle valve
Heating elements in oxygen sensors
Fuel pump
Fuel-tank venting
CAN interface to transmissionMoment interface to Porsche
Stability Management (PSM)
VarioCam Plus
– camshaft phase angle
– valve lift control
Electronic controller for
Variable Turbine Geometry (VTG)
Recirculation valve
Secondary air injection
Engine-bay fan
Starter
On-board diagnostics
Air-conditioning compressor
Interface to instrument cluster
Radiator fans (front control unit via CAN)
Vehicle speed
Air-conditioning settings
Engine immobiliser status
Clutch pedal switch
Ambient air pressure
Temperatures
– coolant
– air upstream from throttle
– engine oil
– air in engine compartment
– ambient air
Exhaust-gas temperature
Engine management system.
The Motronic ME7.8.1 engine
management system facilitates
optimum performance at all
times. This high-precision ECU
controls all engine-related func-
tions and assemblies (see
dia-
gram), such as Variable Turbine
Geometry, VarioCam Plus and
the electronic throttle, one of the
key prerequisites for the standard
Porsche Stability Management
(PSM). This produces various

· 39 · · 38 ·
The 911 GT2 |Drive
The six-speed manual gearbox in
the 911 GT2 is specifically
designed for the high engine
performance. The individual ratios
are carefully matched to the spe-
cific characteristics of the engine.The gear-lever throw is short and
precise, enabling fast and
accurate gearshifts.
A typical feature of the 911 GT2
is the Launch Assistant – for maximum acceleration from a
standing start. The clutch and
accelerator are depressed when
the vehicle is stationary.
When a
boost pressure of approximately
0.9 bar is displayed in the instru-ment
cluster, release the clutchas
quickly as possible and maximum
a
cceleration automatically ensues.
Normally on a turbocharged vehicle
with manual gearbox, the boost
pressure under acceleration from
a standing start is relatively low.
The turbo effect is delayed as
the engine gathers speed and
the boost pressure starts to build.On the 911 GT2, this initial delay
is reduced. While the car is still
stationary, the fuel injection is
modified to help the engine reach
maximum output earlier. The boost
pressure is significantly increased
and the engine readied for a faster
start.
A specially designed traction
control system adapts the acceler-
ation procedure automatically
in the ECU to ensure optimum
traction. The clutch remains
engaged. This reduces load and
prevents high clutch wear. The
power is transmitted directly to
the road via the rear axle.
The gearbox is combined with
a cable linkage and dual-mass fly-
wheel offering added comfort and
precision. The close ratio spread
enables powerful acceleration
within the optimum engine power
band.
Steel baulk rings on gears two to
five ensure a precise gearshift
action even under extreme loads.Cooling is provided by an add-
itional oil-to-water heat exchanger
and spray lubrication. Both of
these features are essential for
durability in endurance racing
conditions.
Other standard features include
a limited-slip differential with
asymmetrical lock factor. Offering
better traction and handling
when exiting a corner, it applies a
higher proportion of drive torque
to the loaded outer rear wheel.
The term ‘asymmetrical’ means
that one lock factor is applied
when cornering under power
(28 %), and another when braking
for a corner (40 %).
Maximum response to minimum effort.
Transmission.

· 47 · · 46 ·
The 911 GT2 |Chassis
The 911 GT2 runs on one-piece
19-inch GT2 wheels with anti-
theft protection and wheel
centre caps featuring the GT2
logo. The wheels are extremely
light for their size due to their
special lightweight construction.The resulting reduction in unsprung
masses improves driving dynamics
and performance. Thanks to the
generous internal diameter of the
wheel, large brakes can be fitted
on the front axle. The wheels run
flush with the exterior of the carand come with special sport tyres
as standard.
The wheel dimensions are
8.5J x 19 ET 53 with 235/35 ZR 19
tyres (front) and 12J x 19 ET 51
with 325/30 ZR 19 tyres (rear).The 19-inch sports tyres provide
a large road contact patch.
They offer greater traction
under acceleration and braking,
greater precision in both handling
and manoeuvrability, as well as
higher cornering speeds on dry
road surfaces. In short: even
greater driving pleasure. Note:
increased risk of aquaplaning due
to lower tread profile.Tyre Pressure Monitoring (TPM),
included as standard equipment,
provides early warning of tyre
pressure loss. The driver is
informed via the on-board com-
puter display as well as a separate
indicator light. A tyre repair system
consisting of tyre sealant and
compressor with separate tyre
pressure gauge is also standard.19-inch GT2 wheel
Less weight. More road contact.
Wheels.

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The 911 GT2 |Comfort
the rev counter. A centrally placed,
clearly visible arrow indicates the
latest time to change gear.
On-board computer.
The integral on-board computer
gives information on boost pres-
sure, average fuel consumption,
speed, remaining distance andexterior temperature. It can also
be used to view data from the
standard Tyre Pressure Monitoring
(TPM) as well as the timing system
featured in the optional Chrono
Package Plus (see page 75).
The computer is operated using
a control stalk on the steering col-
umn, with information displayed in
the instrument cluster.
Instruments.
The sporting credentials of the
911 GT2 refer not only to engine
and chassis, it also boasts a sporty
interior designed around the driver.A car like the 911 GT2 requires
an ergonomically efficient driving
environment with unhindered
access to all key information.
Clearly visible at the centre of
the cluster of five instruments is a large rev counter with GT2
logo and titanium-coloured dial.
The needles and markings in the
instrument cluster are yellow.
For optimum acceleration, you
can view the upshift display in Other standard features include
automatic air conditioning with
active carbon filter.
We’ve demanded your respect. Now have ours.
Interior.

· 75 · · 74 ·
The 911 GT2 |Comfort
‘Welcome Home’ lighting.
This standard lighting function
provides comfort and safety at the
push of a button. The low-beam
headlights are automatically
illuminated when the car is locked
or unlocked using the key remote.
The lights remain illuminated for
a predefined period, lighting your
way to or from the car. This delay
is user-adjustable via Porsche
Communication Management
(PCM) on vehicles with the optional
Sport Chrono Package Plus.
ParkAssist.
This optional parking aid is auto-
matically enabled whenever you
select reverse gear. Move too
close to a stationary object and a
warning signal is emitted. Continue
to reverse and the tone increases
in frequency. The distance is
measured by ultrasonic sensors
which are neatly concealed in the
rear bumper.
Cruise control.
This convenient option has an
effective range of 30 – 240 km / h
(19 – 149 mph). The system is
operated using a switch in a
separate control stalk on the
steering column and can even
be used in first gear.
HomeLink®
(garage door opener).
This optional garage door opener
is freely programmable and inte-
grated within the cockpit. It offers
remote control for up to three
garage, gate, home lighting and/or
alarm systems and is compatiblewith almost all garage and exterior-
door systems.
Automatically dimming interior
and exterior mirrors.
An auto-dimming function is
available as an option for the
911 GT2 for interior and exterior
mirrors. The package also includes
an integrated rain sensor for the
front wiper system.
Luggage compartment.
The volume of the luggage
compartment in the 911 GT2 is
105 litres. The entire compartment
is lined with high-quality, scratch-
resistant materials. The bulkhead
panelling conceals the amplifier
of the optional BOSE
®Surround
Sound System and the DVD drive
for the optional navigation module.
The additional 205-litre rear load-
space inside the car is easily
accessible thanks to the folding
sport bucket seats.
Anti-theft protection.
The 911 GT2 has an engine
immobiliser with in-key transpon-
der as well as a powerful alarm
system featuring contact-sensitive
exterior protection and radar-
based interior surveillance as stan-
dard. The alarm system is
activated and deactivated by a
remote control function in the
ignition key.
Vehicle tracking system.
The 911 GT2 can also be equipped
with an optional factory-fitted
preparation enabling future
installation of a vehicle trackingsystem obtainable from Porsche
Tequipment. This system allows
a stolen vehicle to be traced
throughout most of Europe, and
requires the installation of a
special wiring loom and a high-
capacity battery.
Chrono Package Plus.
The optional Chrono Package Plus
combines a dash-mounted
analogue/digital timer with a range
of useful functions. Lap or journey
times can be viewed, stored and
analysed using the performance
display in PCM. The information
available includes time elapsed
and distance travelled on the cur-
rent lap, as well as the number
oflaps completed and their
respec-
tive times. You can also view the
current fastest lap and remaining
range till empty. Driving times can
be recorded for any stretch of
road, and benchmark times can be
defined. Other useful
features
include a personal
memory func-
tion, controlled via PCM, which
stores personal preferences for a
range of systems, including lights,
wipers, door locks and air condi-
tioning.
Luggage compartmentChrono timer

· 77 · · 76 ·
The 911 GT2 |Comfort
scans for the best signal for
the selected station, and up to
four radio antennae for optimum
reception.
The integrated single CD/DVD
drive, in combination with the
optional BOSE
®Surround Sound
System, can now replay music
from audio and video DVDs in
5.1 Digital Surround Format. As
an option, a six-disc CD/DVD auto-
changer can also be integrated in
the PCM.
A TV tuner, available as an option,
receives analogue and digital tele-
vision broadcasts.
Navigation module.
The optional GPS navigation
module now has a hard drive
with map data for most European
countries,allowing for faster
route calculation
with a choice
of three alternative routes.
A tou
chscreen allows rapid
destination input and gives
information
on traffic or special
points of interest (POI) by simply
touching the symbols on the
map. Route diversions can be
easily and quickly included in
the current route guidance.
When viewing a map, it is possi-
ble to select either a new 3
D
perspective or the familiar 2D dis-
play. At motorway exits, graphical
turn indications are displayed for
better orientation. In split screen
The latest Porsche Communication
Management (PCM).
The 911 GT2 is fitted with the latest
PCM as standard. As the central
control unit for audio, navigation
and communication, it is now even
more powerful and versatile buteasier to operate, while retaining
the basic logic of the menu system.
The main feature is the new
6.5-inch touchscreen for intuitive
control. Naturally, you can also
choose to operate the PCM via
the button controls. The screen
display is very clear with a maximum
of five list entries per page. A help
function is displayed at the foot of
the screen.
For radio listeners, there are up
to 48 memory presets, an FM twin
tuner with RDS which constantlymode, you can choose to display
not only the current map overview,
but also a list of icons that repre-
sent dynamic route guidance.

· 79 · · 78 ·
The 911 GT2 |Comfort
pairing is complete, the mobile
phone’s aerial is switched off to
conserve battery charge and the
phone operates via the car aerial.
Depending on the mobile phone
model, this gives access not only
to the numbers on the SIM card
but also to the phone’s internal
memory. Also, depending on the
phone, it can be controlled using
the PCM, the multifunction steering
wheel or the voice control system,
without it ever leaving your pocket.
Mobile phone preparation.
As an option, the mobile phone
preparation kit (with or without
cradle) is available for Bluetooth
®
connection of mobile phones
which only support the hands-free
profile (HFP). For connection by
HFP, the PCM acts merely as a
hands-free system. Here, too, the
mobile phone can remain tucked
away. Only the basic phone func-
tions can be operated using the
PCM. The GSM connection is
established via the aerial of the
mobile phone.**
Universal audio interface.
With this optional feature, the
storage compartment in the centre
console will contain three connec-
tions: one for your iPod
®, one
for a USB stick/MP3 player and
one as an AUX interface for any
chosen compatible audio source.
The iPod
®or USB stick can be
operated conveniently and safely
via the PCM, the multifunction
steering wheel or the voice control
system. The USB connection can
also be used to download data
from the performance display of
the Sport Chrono Package Plus
and the electronic logbook.
Sound Package Plus.
Fitted as standard is Sound Pack-
age Plus. A separate amplifier with
a total rated output of 235 Watts,
combined with nine speakers,
ensures a perfect sound for the
interior.
Electronic logbook.
The optional electronic logbook
allows automatic recording of
mileage, distance covered, date
and time, starting point and desti-
nation on each trip. Once you
have downloaded the logbooks
from the PCM via Bluetooth
®or
via the optional USB interface,
the data can be analysed on
your home PC using the software
supplied. The software complies
with all statutory requirements
for automatic logbooks as speci-
fied by the German revenue
authorities.
TV tuner.
A TV tuner, available as a option,
receives analogue and digital
television broadcasts (DVB-T) to
provide entertainment between
journeys. For your safety, the
TV picture cannot be displayed
while the vehicle is in motion.
Voice control system.
Almost all of the functions of the
PCM can be controlled via the
latest optional voice control sys-
tem. The menu item is read aloud
exactly as it is displayed on thescreen and the voice control
system recognises commands or
number sequences, irrespective
of the speaker. It gives audible
feedback and guides you through
the functions. There is no need to
‘train’ the system. Phone book
entries can be retrieved, a radio
station selected or the navigation
destination entered directly by
speaking whole words, rather than
dictating one letter at a time.
Telephone module.
The optional GSM telephone
module offers convenience and
excellent reception. By inserting a
SIM card directly into the PCM’s
integral SIM reader, calls can be
made using either the hands-free
facility or the optional cordless
handset. For even more conve-
nience, the Bluetooth
®capability
of a mobile phone can be used
to make calls via the SIM Access
Profile (SAP)*. Once automatic
TV tuner*/** Note: see page 97.