flat tire PORSCHE 911 GT2 2008 5.G Information Manual

· 20 ·· 21 ·The 911 GT2 |
Drive
At Porsche, our aim is not to
increase power – except through
increased efficiency. Which is
why we began with the 911 Turbo
when developing an engine for
the 911 GT2. Its power is com-
bined with rear-wheel drive for
racing-car driving dynamics. But
how is it possible to improve onan engine that is already so close
to perfection? How did we introduce
even greater potential – and the
character of a racing engine? The
answer: by increasing efficiency.
This was mainly achieved by four
crucial components, one of these
being the six-cylinder twin-turboboxer unit with flow-optimised
turbines featuring Variable Turbine
Geometry (VTG, see page 28)
and larger compressors on the
intake side. Together with
VarioCam Plus (see page 26), they
boost performance while reducing
emissions over the entire engine
speed range. Also with the innovative expansion intake system
which works on highly efficient
principles that are contrary to all
previous methods (see page 32).
In addition, the new lightweight
rear silencer made from titanium
enhances performance by producing
less back-pressure through the
exhaust system.
Oil is evenly distributed under all
load conditions (e.g., high-speed
cornering) thanks to a dry-sump
lubrication system with external
tank. After passing through the
engine, the oil is cooled by means
of a dedicated oil-water heat
exchanger. Both of these systems
are proven in competition use.
The water-cooled flat-six twin-turbo
engine with four-valve technology
in the rear of the 911 GT2
generates a mighty 390 kW
(530 hp) from a 3.6-litre
displacement at 6,500 rpm.
Maximum torque of 680 Nm is
achieved at low rpm and sustained
across much of the engine
speed range. It is available
between 2,200 and 4,500 rpm
and the resulting acceleration is
quite literally breathtaking.
300 500 550
600
650
700 750 800
850
280 300 320 340 360
380
400
2000 3000 4000 5000 6000 7000
350 400
450
1000
Power (kW)
Engine Speed (rpm)
180 200 220 240 260 420
900
Torque (Nm)
390 kW (530 hp)
680 Nm
The benchmark sprint to 100 km/ h
(62 mph) is completed in
3.7 seconds; 200 km / h (124 mph)
requires just 11.2 seconds.
Maximum speed – if you really
want to put it to the test – is
329 km / h (204 mph). Even more
impressive is the power-to-weight
ratio of 361 hp per tonne and
the specific power output of
147 hp per litre. Fuel economy
is also exceptional for a car
with such high performance.
There is nothing ordinary about
the 911 GT2 and it exceeds even
the highest expectations. In
other words: everything you’d
expect from the most powerful
road-going 911.
911 GT2 : 680 Nm from 2,200 to 4,500 rpm, 390 kW (530 hp) at 6,500 rpm 3.6-litre twin-turbo boxer engine
The greatest strength comes from within.
Engine.