2008 Mercedes-Benz SLR 722 GT

Sept 28, 2007 – Following repeated requests by motor racing enthusiasts among the SLR. CLUB members, the British motor racing specialists RML Group (Ray Mallock Ltd) have developed the new SLR 722 GT. This puristic super-sportscar is designed exclusively for the racetrack, has no approval for on-road use and will take part in the SLR. CLUB Trophy, a competition series forming part of the SLR. CLUB racetrack programme in Europe.

Compared to the series-production version, the SLR 722 GT has been uniquely and comprehensively re-engineered by RML, especially with respect to the suspension, braking system, aerodynamics, interior and exhaust system. More than 400 components were redesigned. The key data of this edition limited to 21 two-seaters – kerb weight 1390 kilograms, maximum output 500 kW/680 ps at 1.75 bar boost, and maximum torque of 830 Newton metres to guarantee maximum racetrack performance.

The SLR 722 GT already makes a powerful impression at standstill: new body components such as the front apron with front splitter, wide wings, prominent side skirts, the large rear diffuser and the fixed rear spoiler are obvious indicators of outstanding racetrack performance and extensive aerodynamic development work.

The likewise redesigned bonnet conceals a supercharged AMG 5.5-litre V8-engine uprated by RML to develop a peak output of 500 kW/680 ps and a maximum torque of 830 Newton metres. A racing air filter and a new exhaust system ensure outstanding responsiveness and an even more striking engine sound. Dispensing with numerous comfort features means that the SLR 722 GT tips the scales at a kerb weight of just 1390 kilograms. The result is a favourable power-to-weight ratio of 2.0 kg/ps and an acceleration time of 3.3 seconds from standstill to 100 km/h. The maximum speed is 315 km/h.

Fast lap times are guaranteed by the newly developed suspension: a new wheel location system at both front and rear provides improved kinematics and lateral dynamics. A modified stabiliser at the front axle reduces roll when cornering, while an adjustable wheel camber combined with shock absorbers with variable compression and rebound characteristics allow the suspension to be set up for different racetracks. 18-inch lightalloy wheels with central locks allow fast tyre-changes during a race – which is also assisted by the pneumatic jacking system.

Power is transferred by a five-speed automatic transmission with steering wheel shift paddles, which has been adapted to racing conditions. A mechanical locking differential with a locking effect of 70 percent under acceleration and 80 percent on the overrun ensures traction without loss of power. Highly efficient, faderesistant braking is provided by the new racing brakes complying with FIA GT regulations, which feature a modified cooling airflow and adjustable balance. The interior of the SLR 722 GT is characterised by the functional atmosphere of a thoroughbred racing car. Eye-catching details include a rollover cage, aredesigned instrument panel with a racing display, a racing steering wheel and bucket seats with six-point seat belts.

Development, production and sales of the SLR 722 GT are in the hands of the renowned British motorsport and automotive specialists RML Group. A maximum of 21 vehicles will be produced. Servicing and participation in racing events is also under the aegis of RML in collaboration with the SLR.SAFETY & SPEED ACADEMY.

The owners of cars already ordered are all members of the SLR. CLUB – a highly exclusive community which organises events relating to the SLR and is chaired by Dr. Dieter Zetsche, Chairman of Daimler AG and CEO of Mercedes-Benz Cars. The SLR.SAFETY & SPEED ACADEMY forming part of the SLR. CLUB offers special driver training courses, and enables customers to acquire a national Category A racing licence. Prominent, highly-skilled instructors for the SLR. CLUB include David Coulthard, Klaus Ludwig, Jochen Mass, Chris Goodwin and Christina Surer. The central focus of SLR. CLUB events is on automotive passion, professionalism and perfection.

Only 21 examples of the GTR are planned to be made and each costs upward of 750 000 Euros. We hope that a race team will pick up the model to race in FIA GT1, but that will depend on ambitious motivation to race a front engine car against the much more suitable Maserati MC12.

722 GTR #1 was spotted at a Mercedes-Benz dealer in Germany by forum user HDennis. Many thanks to Basman007 and HDennis for making this happen.

Story by Supercars.net

In Detail

submitted by	Richard Owen
released at	2007 Essen Motor Show
built at	Wellingborough, England, German
coachbuilder	Crosby Composites
production	21
price $	$ 775 000 Euros
engine	90 Degree AMG V8 w/Dry Sump
position	Front-Mid Longitudinal
aspiration	Screw-Type Compressor w/Two Charge-Air Coolers
valvetrain	SOHC, 3 Valves per Cyl
displacement	5439 cc / 331.9 in³
bore	97 mm / 3.82 in
stroke	92 mm / 3.62 in
compression	8.8:1
power	500.36 kw / 671 bhp @ 6500 rpm
specific output	123.37 bhp per litre
bhp/weight	482.73 bhp per tonne
torque	830 nm / 612.17 ft lbs
body / frame	Carbon Fibre Body w/Competition Wing, Diffuser, Wider Wheel Arches, FIA Roll Cage
driven wheels	RWD w/Drexler Differential
wheel type	18-Inch Light-Alloy Center Lock
front tires	Michelin
rear tires	Michelin
front brakes	Carbon Discs w/Brembro 8-Piston Calipers, ESP, SBC
rear brakes	Carbon Discs w/Brembro 8-Piston Calipers, ESP, SBC
steering	Rack & Pinion w/Speed Sensitive Assist
f suspension	Double Wishbones w/Öhlins Dampers, Eibach Springs
r suspension	Double Wishbones w/Öhlins Dampers, Eibach Springs
curb weight	1390 kg / 3064.95 lbs
wheelbase	2700 mm / 106.3 in
front track	1638 mm / 64.5 in
rear track	1569 mm / 61.8 in
length	4656 mm / 183.3 in
width	1908 mm / 75.1 in
height	1261 mm / 49.6 in
transmission	5-Speed Auto w/Speedshift System
gear ratios	3.56:1, 2.19:1, 1.41:1, 1.00:1, 0.831:1
top speed	~315 kph / 195.62 mph
0 – 60 mph	~3.3 seconds