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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
Reserves I 43
Porsche Ceramic Composite Brake
(PCCB).
From the start, Porsche has been synony
mous with motorsport. Ever since 1948,
we have pushed the boundaries of
dynamic performance on the racetrack.
We have taken the experience we have
gained and applied it directly to the road.
The optional Porsche Ceramic Composite
Brake (PCCB) is a fine example. In numer
ous race series, including the Porsche
Mobil 1 Supercup, it has been proven to
withstand the harshest demands of the
track.
Nevertheless, resting on our laurels isn’t
our st yle. That ’s why we have also adapt
ed PCCB dimensions to match the perfor
mance capabilities of the new 911 GT3. The cross
drilled ceramic brake discs are
now 410 mm in diameter at the front
and 390 mm at the rear for even more
formidable braking performance.
The use of six piston aluminium mono
bloc fixed brake calipers on the front
axle and four piston units at the rear –
all finished in yellow – ensures extremely
high brake forces which, crucially, are
exceptionally consistent.
PCCB enables shorter braking distances
in even the toughest road and race
conditions. Excellent fade resistance
provides greater balance when slowing
from racetrack speeds.
The key advantage of PCCB is the
extremely low weight of the ceramic
brake discs, which are approximately
50 % lighter than standard discs of a
similar design and size. As well as
enhancing performance and fuel econ
omy, this represents a major reduction
in unsprung and rotating masses.
This results in bet ter road holding and
increased comfort, particularly on uneven
roads, as well as greater agilit y and
improved handling.
Please note that circuit racing, trackday
use and other forms of performance
driving can significantly 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.
Driver and passenger airbags.
We use advanced airbag technology in
the form of full size driver and front pas
senger airbags, which are inflated in t wo
stages depending on the severit y and
t ype of accident (e.g. frontal or offset
frontal). In less serious accidents, the air
bags are only partially inflated, thereby
minimising discomfort to the occupants.
Porsche Side Impact
Protection System (POSIP).
POSIP, fit ted as standard, consists of
side impact protection beams in the
doors and t wo side airbags on each side:
an integral thorax airbag is located in
each seat side bolster and an upwards
inflating head airbag is incorporated
within each door.
Additional safety features include the
headrests which form an integral part of
each seat, an energy absorbing steering
column, three point seat belts with pre
tensioners and force limiters and energy
absorbing elements in the dashboard.
