2008 PORSCHE 911 GT2 lock

· 26 ·· 27 ·
The 911 GT2 |Drive
VarioCam Plus
Engine cooling.
The engine of the 911 GT2 features
cross-flow water cooling with fully
integrated coolant management.
This technology ensures a consis-
tent flow of coolant to each of
the engine’s cylinders. Waste
heat from the oil is transferred to
the coolant via two oil/water heat
exchangers. The coolant is routed
through twin radiator modules
ahead of the front wheels and a
centrally placed unit in the nose.
VarioCam Plus.
VarioCam Plus is a variable valve
timing system on the inlet side
which also features two-stage valve
lift. The benefits it provides include
greater power and torque at all
engine speeds, as well as excellent
running characteristics, better fuel
economy and fewer emissions.
Essentially, VarioCam Plus makes
two engines out of one. The first is
geared for normal road driving, thesecond for high-performance use.
The system switches seamlessly
between the two as the driver
inputs change. All operations
are controlled by the engine
management system. The results:
emphatic acceleration and
smoother running.
The two-stage lift mechanism
on each inlet valve consists of an
electro-hydraulically switchable
tappet. Each of the 12 tappets con-
sists of two concentric parts – anouter ring and a central shaft –
which can be locked together by
means of a pin. The system can
then vary the valve lift by using
two large profile cams on the outer
ring or a smaller cam lobe on the
central shaft. The timing of each
valve is steplessly controlled by
means of an electro-hydraulic
rotary vane adjuster at the head
of the corresponding camshaft.
To improve responsiveness during
warm-up in cold weather, VarioCam
Plus will select the higher valve
lift setting and retard valve timing.
At medium revs and low engine
loads, the lower valve lift setting
is activated and timing advanced in
order to reduce fuel consumption
and emissions. The economy of
the engine is particularly enhanced
at lower engine speeds. For maxi-
mum power and torque, the higher
lift setting is selected and the tim-
ing of the valves is advanced.This results in copious torque
and exceptional fuel economy,
particularly in comparison with
much larger engines offering
similar power output.

· 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.

· 51 · · 50 ·The 911 GT2 |
Chassis
Some things never change,
including driver expectations of
a 911 GT2 : sports-oriented
performance, a direct response
and impressive power.
So Porsche Stability Management
(PSM) has been specially adaptedfor the 911 GT2. In addition to
ABS, the package includes two
automatic driver aids: stability
control (SC) and traction control
(TC).
Stability control (SC), which is
responsible for lateral dynamics,uses a range of sensors to moni-
tor the direction, speed, yaw
velocity (speed of rotation around
the vertical axis) and lateral
acceleration of the car. Using
this information, it is possible to
calculate the actual direction of
travel at any given moment. If thecar begins to oversteer or under-
steer, selective braking is applied
on individual wheels to restore con-
trol in critical driving scenarios.
Traction control (TC), with its
integrated ABD (automatic brake
differential), ASR (anti-slip regula-
tion) and EDC (engine drag-torque
control) functions, is responsible
for the longitudinal dynamics of the
car. Configured for sports-oriented
driving, traction control improveshandling under acceleration on
surfaces with inconsistent grip.
It also prevents the rear from
‘stepping out’ if a wheel loses
traction under full power. The
trigger threshold is relatively high,
which means it is rarely employed
in normal dry conditions.
A unique feature of PSM on
the 911 GT2 is that the control
interventions are delayed and
can be disabled completely in
two stages – for deliberate per-
formance handling.
Stage 1 disables the stability con-
trol (SC) via the ‘SC OFF’ switch in
the centre console. In ‘SC OFF’
mode, the control system does
not intervene if the car goes off-
course in the lateral direction,
which means the throttle can
be used to help steer the car.
Traction control (TC) is still active
in this mode.
Stage 2 disables the traction con-
trol as well via the separate
‘SC+TC OFF’ switch, giving the
driver full command of the vehi-
cle. Another unique feature is the fact that stability control
remains disabled in stages 1 and
2 even when the ABS is required
under braking. Specially develop-
ed for the 911 GT2, this revised
system strategy means the car
can also be enjoyed to maximum
effect on the racetrack.
The anti-lock braking system
(ABS 8.0) is integrated in PSM
and remains active, irrespective
of which settings have been
selected. ABS ensures a relatively
short braking distance and thus
enhanced safety.
It’s good to know who’s in control.
Porsche Stability Management (PSM).

· 53 · · 52 ·
The 911 GT2 |Chassis
The steering system is extremely
direct and provides detailed
feedback from the road. This
high level of precision is very
advantageous in both racing and
normal road use. Thanks to the
precise front-axle kinematics andthe variable steering ratio, the
car responds to every movement
of the wheel.
An important feature of the
steering system is the variable
ratio gearing. Around the straight-ahead position, the ratio
is less direct, enabling smoother
manoeuvres, such as during
motorway driving. There is less
risk of excessive steering inter-
vention destabilising the car at
high speed. Naturally, the systemprovides excellent feedback as
well as the usual agility. As the
wheel is turned harder, the ratio
becomes more
direct and the
steering more responsive. This
variability is
particularly beneficial
in low-speed hairpin bends. The
energy-absorbing steering column
is a key safety feature since, in
the event of a front-end impact, it
enables a deformation path of
100 mm.The intermediate steering shaft is
made from aluminium, while the
protective tube and steering lock
housing are die-cast magnesium.
The standard three-spoke GT2
steering wheel features manual
height and reach adjustment.
Used in conjunction with the seat
adjustment options, it enables
every driver to find the ideal seat-
ing position.
Maximum precision, however powerful the performance.
Steering.

· 73 · · 72 ·
The 911 GT2 |Comfort
* Child restraint systems may not be used in conjunction with sport bucket seats.
Sport bucket seats.*
A car that is capable of such
extreme lateral loads requires a
seat with exceptional support. The
standard sport bucket seat has
manual fore/aft adjustment plus
two additional features rarely
encountered on comparable seat
designs: a folding backrest and
an integral thorax airbag in the
side support.The folding function enables easy
access to the rear luggage area.
The backrest pivots are positioned
high in the side bolsters, providing
optimum support for the torso,
pelvis and legs. This is the first
time ever that the lateral support
of a bucket seat has been com-
bined with a folding backrest.The backrest shell has a glass-fibre
reinforced plastic core and a
carbon-fibre surface with visible
weave pattern. This construction
provides excellent rigidity while
also reducing weight. The seat is
compatible with a six-point racing
harness.
The sport bucket seat features
black leather with Alcantara centre;
Dark Grey natural leather withAlcantara centre is also available
as an option. In conjunction with the
Clubsport package (see page 64),
it has a special flame-retardant
fabric finish for added safety.
Adaptive sports seats.
Adaptive sports seats in leather
with Alcantara centre are also
available as a no-cost option. This
alternative seat option combines
excellent comfort with first-rate
track performance. The compre-
hensive range of power adjustment
controls includes fore/aft position,
squab height, backrest angle and
lumbar support. The side bolsters
on the backrest and squab arepneumatically adjustable for the
perfect fit. This exceptional vari-
ability ensures generous comfort
on long-distance journeys or
precision support on the race-
track. A memory function includes
both exterior mirrors as well as all
seat settings on the driver’s side,
with the exception of the side bol-
sters. The adaptive sports seats
are also optionally available with
seat heating.
Storage compartments.
The everyday usability of the
911 GT2 is as important as its
performance, as evidenced by
the storage compartments in thecentre console and door panels.
Matching upholstered armrests
above the storage compart
ments
provide optimum driver comfort,
particularly on long-distance trips.
Twin cupholders for driver and
front passenger are neatly
concealed below the passenger
airbag. Underneath is a lockable
glove compartment with handy
CD storage.
Two 12-Volt sockets (including the
cigarette lighter) provide power
for all your accessories.
Sport bucket seat, folded Sport bucket seat
Adaptive sports seat Lockable glove compartment

· 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

· 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.