ESP PORSCHE 911 GT3 2013 6.G Information Manual

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VarioCam.
The upgraded VarioCam system is an
engine timing concept that distinguishes
bet ween various engine speeds and
load states so that timing can be adapted
to suit the current power demand. It
regulates not only the adjustment of the
intake camshafts but also the exhaust
camshafts in order to deliver increased
power and torque.
Adjustments are controlled imperceptibly
by the new electronic engine manage ­
ment. The results are extremely smooth
running, better fuel economy, low emis ­
sions and, above all, high power and
torque across the entire engine speed
range.
Dry-sump lubrication.
The engine oil supply is vital at the limits
of sporty performance, especially
in the presence of the powerful lateral
and longitudinal forces that can be
experienced on the racetrack.
Two oil scavenge pumps per cylinder
head and t wo scavenge pumps in the
crankcase return the engine oil quickly
and efficiently to the external tank.
In conjunction with the electronically
controlled oil pressure pump, this means
that the engine has a reliable supply
of oil to the crankshaft drive and both
cylinder banks. The new 911
GT3 is factory ­filled with
Mobil 1 fully synthetic high ­performance
oil. The excellent lubrication properties of this oil ensure a reliable cold start, even
at ver y low temperatures, and contribute
not least to the durabilit y of the engine.

1. Cylinder head
2. Intake camshaft
3. VarioCam intake and exhaust
camshaft controller
4. Timing chain
5. Valve spring
6. Intake valves
7. Follower
8. High-pressure injector
(direct fuel injection)
9. High-pressure pump
(direct fuel injection)
10. Crankshaft
11. Cylinder with Alusil liner surface
12. Forged aluminium piston

13. Forged titanium connecting rod
14. Variable intake manifold
15. Resonance flap
16. Electronically controlled
throttle valve
17. Air-conditioning compressor
18. Water pump
19. Water thermostat

20. Separate engine oil tank
(dry-sump lubrication)
For fuel consumption, CO2 emissions and efficiency class, please refer to page 91.
911 GT3: 350 kW (475 hp) at 8,250 rpm, 440 Nm at 6,250 rpm
360
340 320
300 280260 240
220
200 18 016 0
14 0
120 10 0 8060
40
1000 15 0 02000 25003000 35004000 45005000 55006000 65007000 7500 80008500 9000 950010000 520
500
480 460
440 420
400 380360
340 320
300 280260 240
220
200
Torque (Nm) Power (kW)
Engine speed (rpm)
440 Nm
350 kW (475 hp)
20 I Thrust

Intake manifold.
In interaction with the sports exhaust
system, the plastic variable intake manifold
helps to ensure efficient gas cycles and
high throughput.
To guarantee high torque and power
across a broad engine speed range,
the conventional distributor pipe in the
new 911 GT3 is supplemented by a
resonance pipe with resonance flap. This is opened or closed depending on
the engine speed. For optimum cylinder
charge.
This results in an impressive torque
curve, a high maximum torque and
ultimate power output across a broad
engine speed range.
Sports exhaust system.
The sports exhaust system of the new
911
GT3 has t wo front silencers, t wo
catalytic converters and one rear silencer,
which discharges into the central twin ­tract
tailpipes. The large volume of the exhaust
system reduces exhaust backpressure and
thus increases power output.
The t wo Lambda sensors of the stereo
Lambda control circuitry regulate the composition of the exhaust gas separately
in each exhaust tract, while another

pair monitors pollutant conversion in the
respective cataly tic converters.
Thrust I 23
For fuel consumption, CO2 emissions and efficiency class, please refer to page 91.

Thrust I 27
This is how it works. PDK is essentially
t wo gearboxes in one and thus requires
t wo clutches. This double clutch
arrangement provides an alternating,
non­positive connection between the
t wo half gearboxes and the engine by
means of t wo separate input shafts.
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. Highly responsive and especially sport y – just as you would
expect of the 911
GT3.
That in itself has consequences, not least
for acceleration, for overall performance
and for fuel economy. Positive conse ­
quences in fact. Driving feels even more
dynamic and agilit y is increased.
What about the gear changes them ­
selves? You’ll feel them and you’ll hear
them. Just like before, or indeed more
than ever. The electronic gearbox control logic of the Intelligent Shift Program (ISP)
offers more immediate and faster traction
­
induced upshifts and throttle ­blip down ­
shifts on overrun. In PDK SPORT mode,
downshifts under braking are more
aggressive while, under acceleration, the
shift points are raised even further. So
changing up a gear becomes a physical
experience – and an emotive one.
Shift fast without a moment ’s hesitation.
Just like the professionals.
For fuel consumption, CO
2 emissions and efficiency class, please refer to page 91.

30 I Ideal line
Chassis.
The chassis of the new 911 GT3 has
been engineered to meet the challenging
demands of motorsport – and for this
reason it also provides extremely sport y
day ­to ­day driving. The ride height of the
new 911 GT3 is 30 mm lower than that
of the 911 Carrera. In conjunction with
a series of specifically tuned chassis
components, this offers extraordinary
agilit y, a high degree of driving safet y and
stable handling, particularly in corners.
The independent front suspension
combines McPherson ­type struts with
Being proactive, not reactive. Being there now, not soon.
Instantaneous, not immediate. There is no room for hesitation at the limit.
longitudinal and transverse links. The
rear axle has a multi ­link suspension,
following the LSA (Light weight, Stable,
Agile) concept. Height, camber, track
and the anti ­roll bars can be individually
adapted for use on the racetrack.
Additional ball joints on the front and
rear axles help to establish a particularly
firm connection between the chassis
and the body.
An optional lift system at the front axle
raises the front end by 30 mm. Operable
up to a speed of approximately 50 km/ h, it minimises the risk of grounding on
kerbs, ramps and car park entrances.
Rear-axle steering.
Fit ted as standard, the new rear
­axle
steering combines performance and
everyday practicality. An electromechani ­
cal adjustment system at each rear wheel
enables the steering angle to be adapted
based on the current driving situation,
steering input and vehicle speed.
The advantage for day ­to ­day driving:
during low ­speed manoeuvres, the

system steers the rear wheels in the
opposite direction to that of the front wheels. This has the virtual effect of
shortening the wheelbase. The turning
circle is reduced to make it easier to
park. The advantage for sport y driving:
during high
­speed manoeuvres, the sys ­
tem steers the rear wheels in the same
direction as that of the front wheels.
Driving stabilit y is increased by the virtual
extension of the wheelbase and agilit y
is enhanced by the simultaneous steering
of the front and rear axles, especially
during overtaking manoeuvres on the
racetrack.

Ideal line I 33
Dynamic engine mounts.
Simply responding at the limit means that
you’ve already lost. On sport y drives in
particular, it is essential not to underesti­
mate the unforgiving forces of physics.
Instead, they should be exploited in the
interests of dynamic per formance. This is
what we do with dynamic engine mounts.
The electronically controlled system
minimises the oscillations and vibrations
of the entire drivetrain, especially the
engine, and combines the benefits of a hard or soft engine mounting arrange
­
ment.
A hard engine mounting delivers optimum
dynamic performance because it offers
the highest degree of handling precision
possible. Soft engine mounts, on the other
hand, minimise oscillations and vibrations.
While comfort is improved on uneven
road surfaces, this comes at the expense
of dynamic performance. Our engineers have solved this problem
by enabling the engine mounts to adapt
their stiffness and damping performance
to changes in driving st yle and road sur
­
face conditions. This has been achieved
by use of a fluid with magnetic properties
in interaction with an electrically gener­
ated magnetic field.
Handling is perceptibly more stable under
load change conditions and in fast cor ­
ners. The dynamic engine mount system
also reduces the vertical oscillations of the engine when accelerating under

full load. The results are greater and
more uniform drive force at the rear
axle, increased traction and better
acceleration. Whenever a less assertive
driving st yle is adopted, the dynamic
engine mounts automatically soften to
provide a greater level of comfort.
Pushing to the limit is one thing. Staying
there is another.

Reserves I 41
Brakes.
At the limit, you need one thing above all:
reserves. Not only for power, but for
safet y, too. This is possible only with a
race­proven technology on which the
driver can depend at all times. Only this
can free up extra room for manoeuvre,
especially in the red zone.
The new 911 GT3 is therefore equipped
with a particularly powerful yet light ­
weight brake system with a specifically
Driving at the limit.
But never beyond.
matched brake booster. The red six ­piston
aluminium brake calipers on the front axle
and the four ­piston equivalents at the
rear are designed as monobloc units. This
makes them tougher and enables a more
rapid response and release of the brake,
even under heav y loads.
That’s not all. The brake dimensions on
the new 911 GT3 have been enlarged to
cope with the increase in engine power.
The brake discs are 380 mm in diameter not only at the front but now also at

the rear. Thanks to their t wo ­piece
construction with cast iron brake discs
and aluminium brake chambers, they
reduce weight and thus the unsprung
and rotating masses. The brake discs
are cross ­drilled and internally vented
for powerful braking even in adverse
weather conditions. Or when pitted
against the challenges of motorsport.

Cockpit I 57
Porsche Communication Management
(PCM) including navigation module.
Available as an option, Porsche Communi­
cation Management (PCM) is your control
centre for audio, navigation and commu ­
nication functions. The main feature is
the intuitive seven ­inch touchscreen.
Radio functions include up to 42 memory
presets and an FM dual tuner with RDS
diversit y. The CD/ DVD drive plays CDs
and audio DVDs and is MP3 ­compatible.
With the universal audio interface (USB)
in the glove compartment, you can con ­
nect your iPod
® or any other compatible
audio source of your choice. By means
of the USB socket, it is also possible
to download data from the performance display of the Sport Chrono Package, as
well as data from the electronic logbook.
In the opposite direction, you can trans
­
fer up to 10,000 tracks in MP3 format to
the internal hard drive of PCM and create
your own jukebox.
The navigation module of PCM with high ­
speed hard drive allows you to choose
bet ween a 2D display and a 3D perspec ­
tive. In some regions, even terrain can be
displayed in 3D. The navigation module
also features dynamic route guidance,
which recalculates the route in response
to of ficial traf fic messages (TMC) and
information from traffic flow sensors
(TMC Pro).

Sport Chrono Package.
A precision instrument at the limit: the
optional Sport Chrono Package, com­
prising an analogue and digital stopwatch
on the dashboard. It is operated by the
control stalk for the on ­board computer
and presents timed hours, minutes and
seconds in analogue format. Seconds,
tenths and hundredths of a second
appear on the stopwatch display screen
and are also duplicated on a digital
display in the instrument cluster.
In conjunction with Porsche Communica ­
tion Management (PCM), Sport Chrono
Package functionalit y is enhanced with a
performance display and the abilit y to
display, store and evaluate recorded lap
times. In this way, the driver can view the
current lap time and distance, number of
laps completed and other times achieved
so far. It is also possible to view the
current fastest lap and range until empt y.
Any travelled distances can be recorded
and benchmark times defined. After all,
you can’t push the limit in just one day.

66 I Pit stop
Porsche Sport Driving School.
At Porsche, we are working not only on
the evolution of the sports car, but also
on the development of the drivers. Safe
driving on the road may be second
nature, but what about mastering control
of a sports car at the limits of sport y
performance? We will help you to perfect
your driving safet y as well as your
advanced skills and techniques step by
step.
Under the supervision of our experienced
Porsche instructors in your own car or
in one provided by the Porsche Sport
Driving School, you can refine your ability on
­road or off ­road, on international race ­
tracks or on ice or snow. We will be by
your side from the start and, if it is your
aim, we will accompany you through
every training level on the way to obtain ­
ing your motorsport licence.
To find out more, please call
+49 (0)711 911 ­23364 or go to
w w w.porsche.de/sportdrivingschool.
Porsche Sports Cup.
2013 saw the ninth season of the
Porsche Sports Cup. Six events on
five racetracks, including renowned
Formula 1 circuits such as the Nürburgring, Hockenheimring and Circuit
de Spa
­Francorchamps, deliver exhilarat ­
ing excitement. Various t ypes of race are
open for entry. From regularit y rallies to
sprints, you can compete in the Porsche
Sports Cup by bringing your own road ­
approved Porsche or even a Porsche car
that has been race ­modified.
To find out more, please call
+49 (0)711 911 ­12359 or go to
w w w.porschesportscup.de
Porsche Clubsport.
Porsche Clubs organise a variet y of
one ­off competitions or full series in
which drivers compete in various classes.
Founded in 1952, today there are
640 clubs in 75 countries with a total
membership of approximately 181,000
and the numbers keep growing. The
Porsche Club Organisation is one of
the largest and longest established
automotive associations in the world.
To find out more, please call
+49 (0)711 911 ­23252 or go to
www.porsche.com/clubs.

Environment.
We’ve already spoken about our contribu­
tion to motorsport. To be more precise,
about our responsibility for the future of
motorsport. We meet this responsibility
with intelligent technology, unconven ­
tional ideas and optimum performance.
Our approach to environmental protec ­
tion is no different. In an era of intensify ­
ing debate about global climate change
and CO
2 emissions, every automotive
manufacturer is asking what it has to
offer right now. Our answer has long
been the same: high power output
combined with high efficiency.
Porsche has managed to reduce fuel
consumption significantly across all
model ranges compared with the respec ­
tive previous model even though perfor ­
mance has been increased. This is made
possible by an efficient drive concept,
lightweight construction, optimised
aerodynamics and low rolling resistance.
The environmental management team
at the Porsche Development Centre in
Weissach aims to demonstrate a high
level of environmental responsibility. Here, technological developments are
carried out with environmental protection
in mind. The goal is to enhance perfor
­
mance – but preferably not at the expense
of the environment.
Fuel economy and recycling.
Intelligent lightweight construction has
been part of Porsche DNA since 1948 –
for both technological and ecological
reasons. And, of course, with competitive
advantages in mind. In motorsport, weight
is increasingly the number one factor
of success. Lightweight construction is
therefore the basis for low consumption
The true challenge:
not merely getting faster, but better.
values combined with outstanding
performance.
On the technical side, various compo ­
nents are made with a high proportion
of aluminium, magnesium, plastics and
super ­high ­strength sheet steel. The
materials used have been selected for
their abilit y to withstand load, yet they
are considerably lighter overall than
conventional steel.
Pit stop I 71

On the ecological side, all materials used
are meticulously selected. Each light­
weight material is easily recyclable
and all plastic components are labelled
to facilitate separation for recycling.
The
reduction in the number of plastic
variants helps to ensure more efficient
recycling. Recycled plastics are used
where they meet our exacting technical
requirements.
In short, the new 911 GT3 is around 95 %
recoverable. In addition, Porsche uses a
high proportion of environmentally friendly
water ­based paints. For us, environmental protection does not begin at the end of

a vehicle’s life. It starts at the planning
and development stage.
Emission control.
The new 911 GT3 meets the strict Euro 5
emission standard in the EU and LEV II
in the USA. Vehicles manufactured by
Porsche demonstrate that even high ­
performance sports cars can achieve
moderate emission values in their
respective category. This puts the new
911 GT3 among not only the most powerful sports cars of the future, but
also the cleanest.
This has been accomplished not least by
the t wo cataly tic converters and stereo
Lambda control circuits, which monitor
each cylinder bank separately. For each
exhaust tract, t wo Lambda sensors regu
­
late the composition of the exhaust gas.
Another Lambda sensor for each cylinder
bank monitors pollutant conversion in the
respective cataly tic converter.
Fuel.
All Porsche models – including the new
911 GT3 – are designed to operate on
fuels with an ethanol content of up to
10 %, e.g. ‘E10’. Ethanol has a positive
impact on the CO2 balance since the
plants grown for the production of
this biofuel also absorb CO
2 from the
atmosphere.
The release of hydrocarbons from the
fuel system has been minimised thanks
to the active carbon filter and the
multi ­layered material from which the
fuel tank is made. All fuel lines are
made from multi ­layered plastic, steel
or aluminium.
For fuel consumption, CO2 emissions and efficiency class, please refer to page 91.
72 I Pit stop