Two turbochargers for extra power
|
The New Porsche 911 GT2The 911 GT2 is the new top performer in the 911 model series. Through its striking design with extra-large air intake scoops at the front and the characteristic rear wing, this fastest of all models in the 911 series clearly demonstrates its supreme performance right from the start, before even setting off.
Innovative air supply The extra power of the engine in the new 911 GT2 versus the 911 Turbo is provided by two exhaust gas turbochargers with an enlarged compressor wheel and the flow-optimised turbine housing, both of which are laid out for even higher charge pressure. A further point is that Porsche's engineers have for the first time combined the turbocharged power unit in the 911 GT2 with a so-called expansion-type intake manifold - a genuine revolution in the concept of turbocharged power units. The principle applied in this case is to use the oscillating intake air during the cooler expansion phase to prepare the fuel/air mixture, keeping the temperature of the fuel/air mixture lower than in the engine of the 911 Turbo. This ensures a significant increase in allround efficiency - more power on less fuel, with fuel consumption dropping by up to 15 per cent under full load. As a result, average composite fuel consumption in the New European Driving Cycle (NEDC) of 12.5 litres/100 km or 22.6 mpg imp is exceptionally good for a car of this class - and thanks to its new exhaust system, the new 911 GT2 also outperforms the EU4 emission standard. Extra-light exhaust system The 911 GT2 offers new developments and highlights not only on the intake manifold, but also on the exhaust side: This is the first Porsche homologated for the road to feature a rear-end silencer and tailpipes made as standard of titanium, an extra-light but stable material. Weighing approximately 9 kilos, the silencer is roughly 50 per cent lighter than a comparable component made of stainless steel. Setting off with the Launch Assistant
Specially set-up PASM damper system and upgraded PSM The chassis and suspension of the new 911 GT2 is based on the chassis of the 911 GT3, while at the same time the entire set-up is approximately 25 millimetres or 1.00" lower and firmer than on the 911 Carrera. PASM Porsche Active Suspension Management featured as standard on the new 911 GT2 has also been modified accordingly, with somewhat firmer and tauter damper action in the Normal mode, as opposed to an extra-firm and taut suspension in the Sports mode suited ideally for use on the race track. The new 911 GT2 comes as standard with PCCB brakes featuring ceramic brake discs. The exceptional features of this brake system include in particular a very fast response, enormous stability against fading, superior safety reserves, and low weight. Compared with grey-cast-iron brakes of the same size, PCCB reduces unsprung masses in the car by approximately 20 kg or 44 lb. Yet another innovative feature developed by Porsche's engineers for the new 911 GT2 is PSM Porsche Stability Management specifically tailored to the new model: Giving the driver the option to deactivate various components, this special driving stability system meets the demands of even the most sporting and dynamic motorist. To set up the system to his specific requirements, all the driver has to do is press two buttons in the front centre console: Pressing the SC OFF (SC: Stability Control) button, the driver deactivates lateral dynamic control. By additionally pressing the SC+TC OFF (TC: Traction Control) button, the driver also switches off longitudinal dynamic control, while the ABS brake system remains active at all times. Innovative sports bucket seats The high-performance concept of the 911 GT2 also includes sports bucket seats made of a very light combination of glass- and carbon-fibre-reinforced plastic (GFP/CFP) with a visible carbon surface, featured as standard on the new model. Incorporating a new type of manual adjustment, the sports bucket seats combine unusually good side stability with enhanced access to the area behind the front seats, thanks to the backrests tilting forward whenever required.
READER COMMENTS
|
HOME |
CARS AND VEHICLES |
PORSCHE-MODELS |
MOTORSPORTS |
Indeed, these design and streamlining
features so characteristic of the 911 GT2 give the car an exemplary drag
coefficient of Cd = 0.32, together with downforce on both the front and rear
axle. Available only with a manual six-speed gearbox, the 911 GT2 supersports
accelerates to 100 km/h in just 3.7 seconds and reaches a top speed of 329
km/h or 204 mph. The power unit of the new 911 GT2 is based on the flat-six
already featured in the 911 Turbo, with two exhaust gas turbochargers using
variable turbine geometry (VTG) providing the requisite supply of air. Maximum
output of 530 bhp (390 kW) from this 3.6-litre boxer engine comes at 6,500
rpm, peak torque is 680 Newtonmetres (501 lb-ft) maintained consistently
over a wide speed range between 2,200 and 4,500 rpm. And with the car's unladen
weight being just 1,440 kg or 3,175 lb, the power-to-weight ratio is 2.72
kg or 6.00 lb per horsepower.
The new 911 GT2 is likewise the first
production sports car from Porsche to feature a Launch Assistant enabling
the driver to set off with optimum performance and ensuring simple hand-ling
at all times. To activate the Launch Assistant, all the driver has to do
is press down the throttle in full with the car at a standstill, the appropriate
gear in mesh, and the clutch pedal pressed to the floor. Then the system
will automatically set engine speed to exactly the right level, the driver's
only task then being to take his foot off the clutch as quickly as possible
in order to accelerate the car with maximum speed and power. In this process
PSM Porsche Stability Management prevents the car from "twitching", with
the full power of the engine being transmitted smoothly to the road. Rear-wheel
drive on the 911 GT2 comes with an asymmetrical limited-slip differential
main-taining a locking factor of 28 per cent under power and 40 per cent
in overrun. Porsche's new supersports runs on 19-inch wheels combined with
specially developed tyres measuring 235/35 at the front and 325/30 at the
rear. Tyre pressure, finally, is supervised and maintained by sensors in
the tyre pressure control system also featured as standard.