service PORSCHE 911 GT2 2010 5.G Information Manual

21 |
Porsche Ceramic Composite
Brake (PCCB).
Being in awe also means knowing
when
to brake – when necessary.
The new 911 GT2 RS is equipped
as
standard with the Porsche
Ceramic
Composite Brake (PCCB).
This braking technology has already
demonstrated its performance
credentials on the racetrack,
for example, in the vehicles of
the Porsche Mobil 1 Supercup.
Its
ceramic brake discs have a
diameter of 380 mm at the front
and 350 mm at the back – for
excellent braking power. The ceramic discs are made from
a specially treated carbon-fibre
compound that is silicated in a
high-vacuum process at approxi-
mately 1,700 °C. The resulting
brake discs are much harder and
therefore more resistant to exces-
sive temperatures than cast iron
discs. Typical of PCCB, the low
thermal expansion prevents defor-
mation under heavy braking. Fur-
thermore, the ceramic brake discs
are totally resistant to corrosion
and offer bet ter noise-damping
properties.The use of six-piston aluminium
monobloc fixed calipers on the front
axle and four-piston aluminium
monobloc fixed calipers on the
rear axle ensures a very high and,
above all, constant braking pres-
sure. The brake response is much
faster and more precise and
requires only moderate input.
All the necessary ingredients are
there for short braking distances,
especially in tough conditions.
And safety is also increased when
braking from high speeds, thanks
to the excellent fade resistance
of PCCB.
The key advantage of the ceramic
brake system is in the extremely
low weight of the brake discs: they
are approximately 50% lighter than
cast iron discs of similar design and size. In the new 911 GT2 RS
the calipers on the front and rear
axles are made from light weight
aluminium giving an additional
weight saving of approx. 4.8 kg
compared with stainless steel
calipers. This doesn’t just have
a positive effect on driving per-
formance and fuel consumption.
Above all, it means that the
unsprung and rotating masses
are reduced.
The result is improved road-

holding and comfort, especially on
uneven roads. As well as greater
agilit y and even bet ter handling.
Please note that circuit racing,
trackday use and other forms
of performance driving can sig-
nificantly reduce the service life
of even the most durable pads
and discs. As with conventional
high-performance braking sys-
tems, we recommend that all
brake components be profession-
ally inspected and replaced where
necessary after every track event.
Safety means being able to rely on the
systems working in the background.