2008 PORSCHE 911 GT2 fuel

· 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.

· 59 · · 58 ·
The 911 GT2 |Safety
The 911 GT2 is equipped as
standard with the Porsche
Ceramic Composite Brake (PCCB)
that has already demonstrated
its performance credentials on
the racetrack, for example, in the
vehicles of the Porsche Mobil 1
Supercup.only much harder than metal, it
is also more resistant to heat.
Even at high temperatures, the
thermal resistance of the PCCB
disc ensures exemplary dimen-
sional stability. The ceramic
material is totally resistant to
The large disc diameter (380 mm
front and 350 mm rear) adds sig-
nificantly to brake performance.
The ceramic discs are made from
a specially treated carbon-fibre
compound that is silicated in a
high-vacuum process at 1,700 ºC.
The material thus produced is notcorrosion and offers excellent
acoustic damping properties.
The pads are mounted in six-piston
monobloc aluminium fixed calipers
at the front, with four-piston units
at the rear. The resulting brake
forces are not only extremely
high, they are also exceptionally
consistent. The pedal response
is fast and precise with only
moderate input required.
PCCB enables shorter braking
distances in even the toughest
road and race conditions. Excel-
lent fade resistance ensures
greater balance when slowing
from racetrack speeds.
The key advantage of PCCB is
the total weight saving of approxi-
mately 50 % over comparable
metal discs. The mounting bells
on both front discs are made
from weight-saving aluminium. As
well as enhancing performance
and fuel economy, there is a major
reduction in both the unsprung
and rotating masses. This, of
course, improves comfort and
road-holding on uneven road
surfaces as well as general
handling and agility.
Please note that circuit racing,
trackday use and other forms of
performance driving can signifi-
cantly reduce the service life of
even the most durable 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.
Porsche Ceramic Composite Brake (PCCB)
When it comes to brake technology, we demand nothing but the best.
Porsche Ceramic Composite Brake (PCCB).

· 69 · · 68 ·
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.

· 85 · · 84 ·
The 911 GT2 |Environment
Here, all technological developments
are carried out with environmental
protection in mind. The aim: pure
performance – but not at the
expense of the environment.
You can find more information
about environmental matters in the
separate brochure ‘Porsche and
the Environment’, or on our website
www.porsche.com.
Exhaust emission control.
The 911 GT2 easily meets the strin-
gent emissions standards for the
EU4 regulations in Europe and
LEV II regulations in the USA. This
demonstrates that even high per-
formance sports cars can achieve
moderate emissions values in their
respective categories. The 911 GT2
is not only one of the most power-
ful cars around, but also one of the
cleanest. One pair of sensors is
used to monitor the oxygen levels
in each of the twin exhaust tracts.
An additional pair of sensors* –
again, one on each tract – is
located downstream from the cat-alytic converters. This information
is used by the engine management
system to monitor the efficiency of
the catalysts.
Fuel.
The current Porsche sportscar
model range is already compatible
with fuels that have an ethanol
content of up to 10 %. A ‘biofuel’
made from naturally replenishing
materials, ethanol has a positive
impact on the carbon dioxide bal-
ance since the plants grown for its
production also absorb carbon
dioxide from the atmosphere.
Fuel system.
In the fuel supply system, we’ve
minimised the evaporation of
hydrocarbons. This is achieved
through a combination of active
carbon filter and special fuel-tank
coating. All fuel lines are made
from aluminium, while those
carrying vapours are made from
multi-layer plastic.
* Not featured in markets with leaded fuel.
Noise.
The 911 GT2 complies with all
noise regulations in the respective
markets. Rather than resorting
to engine encapsulation, we’ve
eliminated noise at source. All that
remains are the powerful acoustics
you’d expect from a thoroughbred
Porsche.
Servicing.
Longer service intervals are not
only easier on resources, they also
reduce ownership costs.
For service intervals of the 911 GT2,
please refer to the price list.
In an era of intensifying debate
about CO
2emissions, every auto-
motive manufacturer is considering
how to deal with the question of
fuel consumption. Our answer has
long been the same: maximum
efficiency.
Porsche reduces the CO2emissions
of its vehicles annually by an aver-
age of 1.7 %. In relation to engine
power, Porsche is already among
those manufacturers achieving the
lowest CO
2emissions. This has
been achieved through an efficient
drive concept, optimised aero-dynamics, low rolling resistance
and lightweight construction.
This high degree of environmental
responsibility is clearly demonstrated
by our approach to environmental
management at the Porsche
development centre in Weissach.
Powerful performance needn’t cost the earth.
Environment.

· 107 · · 106 ·
The 911 GT2 |Technical data
Technical data
Engine
Cylinders6
Displacement3,600 cm3
Max. power (DIN)390 kW (530 hp)
at rpm6,500
Max. torque680 Nm
at rpm2,200 – 4,500
Compression ratio9.0 : 1
Transmission
LayoutRear-wheel drive
Manual gearbox6-speed
Chassis
Front axleMcPherson-strut suspension
Rear axleLSA multi-link suspension
SteeringVariable steering ratio,
power-assisted (hydraulic)
Turning circle10.9 m
BrakesPorsche Ceramic Composite Brake (PCCB):
6-piston monobloc aluminium fixed calipers
at front, 4-piston monobloc aluminium fixed
calipers at rear, discs internally vented and
cross-drilled
Vehicle stability systemPSM
Anti-lock braking systemABS 8.0
WheelsFront: 8.5J x 19 ET 53
Rear: 12J x 19 ET 51
Ty r e sFront: 235/35 ZR 19 (sport tyres)
Rear: 325/30 ZR 19 (sport tyres)
Weights
Unladen weight (DIN)1,440 kg
Unladen weight (EC)*1,515 kg
Permissible gross weight1,750 kg
Performance
Top speed329 km / h (204 mph)
0 –100 km / h (0 – 62 mph)3.7 secs
0 –160 km / h (0 – 99 mph)7.4 secs
0 – 200 km / h (0 –124 mph)11.2 secs
Flexibility 80 –120 km / h (50 –75 mph) 4.1 secs
in 5th gear
Fuel consumption/emissions**
In accordance with 80 / 1268 /EC as valid at the time of going to print
Urban in l / 100 km (mpg)18.8 (15.0)
Extra urban in l / 100 km (mpg)8.9 (31.7)
Combined in l / 100 km (mpg)12.5 (22.6)
CO2emissions in g /km298
Dimensions /aerodynamics
Length4,469 mm
Width1,852 mm
Height1,285 mm
Wheelbase2,350 mm
Luggage compartment volume105 litres
Tank capacity (refill volume)90 litres
Drag coefficient0.32
** Weight is calculated in accordance with the relevant EC Directives and is valid for standard specification vehicles only.
Optional equipment means greater weight. The figure given includes 68 kg for the driver and 7 kg for luggage.
** The figures given refer to vehicles with standard specification in Germany. Data determined in the NEDC (New European Driving Cycle) in accor-
dance with the EU5 (80/1268/ EEC) measurement method in the version valid at time of going to print. The figures do not relate to an individual
vehicle, nor do they constitute part of the offer. They are intended solely as a means of comparing different types of vehicle. Further information
on the individual vehicles can be obtained from your Porsche Centre.

· 109 · · 108 ·The 911 GT2 |
Index
Index
A
ABS 51
Air conditioning, automatic 69
Airbags 62
Alarm system 75
Anti-theft protection 75
Audio system 76
B
Bi-Xenon lighting system 56
Bodyshell structure 60
BOSE® Surround
Sound System 80
Braking system 58
C
Catalytic converters 34, 85
Charge-air cooling 16
Chassis 42
Chrono Package Plus 75, 92
Clubsport package 64, 92
CO
284
Colours 88
Comfort 66
Communication 76, 96
Cruise control 74
D
Design 16
Drive 18
Dual-mass flywheel 39
E
Electronic logbook 78
Engine 20
Engine cooling 26
Engine management system 36
Environment 82
Exhaust emission control 85
Exhaust system 34
Expansion intake manifold 32
Exterior 91
F
Factory collection 100
Fire extinguisher 64, 93
Front axle 44
Fuel supply 35
Fuel system 35, 85
G
Gearbox, manual 38
GSM telephone module 78
H
HomeLink®74
I
Ignition system 35
Instruments 68
Interior 68, 93
Interior materials 70, 95
K
Knock control,
cylinder-specific 36
L
Launch Assistant 38
Leather 89, 95
Lightweight design 24
Loudspeakers 79, 80
Lubrication, dry-sump 25
Luggage compartment 74
M
Mobile phone preparation 79
N
Navigation module 77
Noise 85
O
Oil supply 25
On-board computer 69
Oxygen-sensor control 34, 85
P
ParkAssist 74, 90
Personalisation 86
Porsche Active Suspension
Management (PASM) 48
Porsche Ceramic Composite
Brake (PCCB) 58
Porsche Communication
Management (PCM) 76
Porsche Side Impact
Protection (POSIP) 62
Porsche Stability
Management (PSM) 50
R
Ram air principle 17
Rear axle 45
Rear wing 17
Recycling 84
Roll cage 64, 92
S
Safety 54
Safety, active 56
Safety, passive 60
Seats 72
Seats, adaptive sports 73, 92
Seats, sport bucket 15, 72
Service 102
Servicing 85
Six-cylinder twin-turbo
boxer engine 20, 24
Sound Package Plus 79
Sport tyres 46
Stability control (SC) 14, 50
Steering 52
Steering wheel 71
Storage compartments 73
T
Technical data 106
Telephone module 78
Traction control (TC) 14, 50
Transmission 38
Turbocharger 28
TV tuner 78
Tyre Pressure
Monitoring (TPM) 47
U
Universal audio interface 79
V
Variable Turbine
Geometry (VTG) 28
VarioCam Plus 26
Vehicle tracking system 75
Voice control system 78
W
‘Welcome Home’ lighting 74
Wheels 46

The 911 GT2 |Das Konzept
The models featured in this publi-
cation are approved for road use
in Germany. Some items of equip-
ment are available as extra-cost
options only. The availability of
models and options may vary
from market to market due to
local restrictions and regulations.
For information on standard and
optional equipment, please consult
your Porsche Centre. All infor-
mation regarding construction,
features, design, performance,
dimensions, weight, fuel consump-
tion and running costs is correct
at the time of going to print.
Porsche reserves the right to alter
specifications and other product
information without prior notice.
Colours may differ from those
illustrated. Errors and omissions
excepted.
© Dr. Ing. h.c. F. Porsche AG, 2008
All text, images and other
information in this publication
are copyright
Dr. Ing. h.c. F. Porsche AG.No part of this publication may be
reproduced or transmitted, in
any form or by any means, without
prior permission in writing from Dr.
Ing. h.c. F. Porsche AG.
Porsche, the Porsche Crest,
911, Carrera, Tequipment,
PCCB, PCM and PSM
are registered trademarks of
Dr. Ing. h.c. F. Porsche AG.
Dr. Ing. h.c. F. Porsche AG
supports the use of paper from
sustainable forestry. This
catalogue is printed on paper
made from 100 % PEFC-certified
pulp (Program for the Endorse-
ment of Forest Certification).
Dr. Ing. h.c. F. Porsche AG
Porscheplatz 1
70435 Stuttgart
Germany
www.porsche.com
Edition: 03/08
Printed in Germany
WVK 235 320 09 GB/ WW