2007 Porsche 911 GT3 RSR
Above Images ©Image Credits - Porsche Automobil Holding SE
ATLANTA - July 13 - Using the full resources of the Porsche engineering staff at its Weissach motorsports facility, and combining the racing technology developed over 50 years of motorsports competition, Porsche has announced the introduction of the new 2007 911 GT3 RSR (type 997) for the American Le Mans Series and other world GT racing venues. The latest version of the most successful racing sports car in history is based on the street production model 911 GT3 RS (model year 2007) which will be launched in late 2006.
Featuring the body of the 911 GT3 RS, which is based on the 911 Carrera 4, the 911 GT3 RSR has wider rear fenders and rear track to improve performance capabilities over its predecessor. The car has also been developed to fit into the 1,225 kg class, which allows for two inch-wider rear wheels (14 inches), and part of the added weight has been used to lower the center of gravity. The new 911 GT3 RSR will also improve aerodynamic efficiency by seven percent and body stiffness has been increased by 10%.
The new car is built in accordance with the 2006 ACO LMGT2 Regulations and the 2006 FIA Article 257 (Technical Regulations for Series Grand Touring Cars).
More than 250 of GT3-R family of 911 race cars have been sold around the world since the introduction of the 911 GT3 R in 1999, and the car has won hundreds of professional races and championships including the 24 Hours of Le Mans, the 24 Hours at Daytona, the 12 Hours of Sebring, and 53 class wins in the American Le Mans Series. In ALMS, the Porsche teams using the GT3 R/RS/RSR have won the championship six of the series' seven-year existence.
Employing a 3.8-litre, flat six-cylinder boxer engine, the 911 GT3 RSR delivers 485 hp at 8,400 revs per minute (with two 30.0 mm restrictors). Maximum torque is now 435 Nm at 7,250 rpm.
The 911 GT3 RSR also has many notable changes from its predecessor. The sequential six- speed dog-type transmission gearbox has been redesigned to reduce the drive shaft angle which increases efficiency and improves durability. The brake master-cylinders, clutch master cylinder and pedals have been pre-mounted to a sub-frame, which is then bolted onto the floor to gain stiffness and a lower center of gravity. The re-designed electrical system optimizes serviceability by placing all relevant elements in the immediate vicinity of the driver.
The racing suspension, with McPherson struts in the front and the Porsche multi-link axle at the rear, feature new kinematics and closely corresponds to the configuration of the street- legal 911 GT3 RS. The new ZF-Sachs shock absorbers build up less friction and offer excellent response. The adjustable double coil springs, roll bars and shock absorbers ensure precise tuning to suit each circuit.
The 911 GT3 RSR features a brake system with six-piston fixed brake calipers measuring 380 mm in the front, four-piston fixed calipers measuring 355 mm in the rear.
Over the 2006/07 winter, 35 units of the new racing sportscar will initially be built.