From 1990 to 2019, Porsche has already produced over 4,200 units of the 911 GT3 Cup and each of them...
This was the fourth version of the 991 RSR - the first two came with the rear engine, then the first mid-engine version was launched (all 4.0-litre) and finally the mid-engined RSR 4.2 with the largest 911 engine ever made. The increase in the engine capacity is a question mark as on production models the capacities are decreased and turbochargers are used. The 991 RSR 4.2 didn't have anything in common with the production cars anymore. No change in terms of power-to-weight ratio.
Two decades after the different 911 GT1 cars the mid-engined 911 is back! In order to install a proper diffuser under the rear end of the 991, the engine had to make room for it and the engine/transmission unit was rotated 180 degrees. The extended rear diffuser, a top-suspended rear wing and the new side mirrors help to increase downforce with reduced drag. The FIA rules meant no turbo was needed due to power limits, so the normally aspirated 4-litre flat-6 was taken from the 991 GT3 R.
The rear of the world’s most-produced GT racing car now houses a 4-litre, six-cylinder flat engine for even more drive. Thanks to thoroughbred motorsport technology, the compact engine with direct fuel injection delivers peak performance of 357 kW (485 hp). A range of innovative details also improve efficiency in addition to engine performance, ensuring even better durability of the naturally aspirated engine in racing mode and reduced maintenance costs.
The 911 GT America was based on the 991 GT3 Cup. It was built exclusively for the United Sports Car Racing (USRC) series and its GT Daytona class for 2014. While the GT3 Cup had a 3.8-litre engine at the time, the GT America was fitted with a 4.0-litre unit developing 351 kW. The main visual difference is the rear spoiler made to fit the USRC rules. Like the GT3 Cup, the GT America has 380 mm steel brake rotors at the front axle with 6-piston fixed calipers.
The new Porsche 911 GT3 Cup is powered by a 3.8-litre six-cylinder flat engine. It generates 460 hp (338 kW) at 7,500 revs, surpassing the predecessor by 10 hp. A six-speed dog-type gearbox developed by Porsche Motorsport which is operated via shift paddles at the steering wheel for the first time in a Porsche brand trophy race car transmits the power to the rear axle. The single piece race wheels with centre mount were also new.
As the rules do not permit higher output engines, the engine for the 991 RSR was taken from the 997 GT3 RSR 4.0 and the development work focused on the chassis, body, aerodynamics and the gearbox. A wishbone front suspension replaced the McPherson struts used in 997. A new development was the lightweight gearbox. One of the priorities in the development was the more evenly balanced weight distribution. The centre of gravity was lower, too.
Following the Porsche 911 GT3 Cup, Porsche AG, Stuttgart, is entering yet another racing car in the 2010 motorsport season: The 911 GT3 R will be raced in series based on the international FIA GT3 regulations, thus succeeding the 911 GT3 Cup S. The main focus in developing this new model was on even better drivability and even easier handling. The 911 GT3 R is powered by a four-litre six-cylinder boxer engine delivering maximum output of 480 bhp (353 kW) transmitted to the rear axle by a sequential six-speed dog gearbox.
To a large extent, the 3.6-litre boxer engine is identical to the power unit used in the Porsche Mobil1 Supercup and the international Carrera Cup championships. Power output has increased by 20 horsepower to now 440 hp (324 kW) at 8,000 rpm. Maximum torque is up by ten Nm to 430 at 7,250 revs per minute. The power increase results from optimised engine electronics and a modified exhaust system. In contrast to the GT3 Cup, the body of the Cup S is not based on the road-going GT3 but on the GT3 RS.
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) and was launched in late 2006. 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. The new car is built in accordance with the ACO LMGT2 Regulations and the FIA Article 257.
The Porsche 997 GT3 Cup was a series of race cars created by Porsche to enter the Fédération Internationale de l’Automobile (FIA) Group GT3 racing class. Replacing the 996 GT3 Cup, the 997 Cup's 3.6 litre engine is rated at 294 kW (400 PS; 394 hp) and was mated to a six-speed sequential transmission. In 2009, the GT3 Cup received several 997.2 updates including a new 3.8 litre engine with an output of 331 kW (450 PS; 444 hp).
Based on the road-going 996 911 GT3 RS, the GT3 RSR features improvements to its predecessor in all key areas. The vehicle is available in an ACO (Automobile Club de l'Ouest) version for competing in Le Mans and in the American Le Mans Series as well as in a FIA specification. The 911 GT3 RSR features a modified front which improves downforce at the front axle. The 3.6-litre, six-cylinder boxer engine delivers 445 hp at 8,250 revs. Maximum torque is now 405 Nm at 7,200 rpm, with top revs reached at 8,500 (for the FIA specification with two 30.8 mm air restrictors). Race cars never got more exciting than this.
The 996 GT3 Cup served as the basis for the 996 GT3 road car, featuring a 3.6 litre engine with 355 hp. For the 1999 season the engine output was increased to 365 hp. For the 2001 season the GT3 Cup received modified aerodynamics including an enlarged rear wing and improved cooling. For 2002, the GT3 Cup received several changes, adopting facelift 996.2 features such as Turbo-style headlights. The new body significantly improves aerodynamics and cooling. Engine output was increased to 380 hp. For 20003 onward, the power was hiked once again, with the engine now pumping out 385 bhp @ 7250 rpm and of torque 288 ft lbs @ 6500 rpm.
The 1998 GT1 car was a totally rethink and vast upgrade versus the prior year car. 1998 Le Mans 24-hour race In the 1998 jubilee year, the Porsche team celebrated its 16th overall victory in Le Mans with a double win for the 911 GT1 98. On 6th/7th June, the winning car was driven by Laurent Aiello, Allan McNish and Stéphane Ortelli. It was almost 50 years to the day on which the first Porsche sports car saw the light of day.
Towards the end of the 1996 season, Porsche made revisions to the 911 GT1 in preparation for the 1997 season. The front end of the car was revised including new bodywork which featured headlamps that previewed the all-new generation of the (996) Porsche 911 which would be unveiled in 1997. It had the same engine as the previous version, but new aerodynamic elements allowed the 1997 version to be considerably faster than the 1996 version. At Le Mans the works cars led the race but did not last the full distance; a privately entered 1996 specification GT1 managed 5th overall and third in its class.
In spite of its 911 moniker, the car actually had very little in common with the 911 of the time, only sharing the front and rear headlamps with the production sports car. Designed and developed to compete in the GT1 class of sportscar racing, which also required a street-legal version for homologation purposes. It was powered by a twin-turbo flat 6 that was good for 600 bhp. The 1996 911 GT1 clocked at a top speed of exactly 330 km/h (205 mph) on the legendary Mulsanne Straight.
With the 1993 Carrera 2 as the starting point, Porsche had to make at least 50 roadgoing cars in order to qualify this new model for the Carrera ADAC GT Cup, which served as the basis for a motor racing variant to come, the Carrera RSR 3.8. The RSR 3.8 was nothing short of an all-out race car that could be delivered to the track in a ‘just add driver’ form. The Porsche Carrera RSR 3.8 racked up a catalogue of impressive international race results right from the outset, winning overall at the Spa 24 Hours, Suzuka 1000km, and the 24 Hours of Interlagos.
For race teams and track day customers Porsche prepared a small number of the 964 Cup cars according to the FIA NG-T regulations. Officially called the Competition model, these custom-ordered cars were an intermediary step between the Carrera Cup option (M001) and the standard tourer (M002). This M0003 option was available directly from Porsche as a road-going model. These cars had almost all the Carrera Cup modifications including the new suspension. This lowered the car by 40mm in the rear and 50mm in the front. It also included fitting of the larger 930 Turbo disc brakes and adjustable anti-roll bars.
Introduced in 1989 (the year of the 911’s 25th anniversary), the 964 Carrera 4 was a significant new model for the company, but the 4-wheel drive system was deemed unsuitable for the company’s racing series. Manufactured alongside the Carrera 4 at the same time was the more traditional rear-wheel drive Carrera 2, but this model’s launch was only planned for a year later, in the hope that it would not detract from potential sales of the Carrera 4. The 1990 season was the first season that saw the 911-based model become the pillar on which the Porsche Carrera Cup series has been established.
For the 1974 racing season 911 Carrera RSR 3.0 (246 kW) and RSR Turbo 2.1 (338+ kW) were created - the 3.0L for the customer teams and the 2.1 turbo for Porsche’s own team. The Carrera RSR 3.0 was made in small numbers for racing. The 3.0 RSR would go on to become the most successful Group 4 racing car of its time thanks to its combination of low weight, immense Porsche 917 brakes, impeccable handling, and a 330+hp naturally aspirated flat-6.
For 1974 both the 911 Carrera RSR 3.0 and RSR Turbo 2.1 were created - the 3.0L for the customer teams and the 2.1 turbo for Porsche’s own team. The 911 Carrera RSR Turbo 2.1 developed 338-368 kW in power, but as the engine was small, the turbo lag was big and it wasn’t as easy to drive out of the corners as it was with the 3-litre normally aspirated car. Weight reduction measures included plastic hoods, fender flares and doors and an aluminium safety cage.
To homologate the 1968 911 for competition purposes, Porsche began with the Spartan 911 T which were a full 54 kg (118 pounds) lighter than their 'S' siblings. Porsche offered clients the opportunity to buy a 911 T outfitted with competition equipment directly from the factory, and the resulting cars have become known as the 911 T/R. They were built in low quantities to a range of specifications depending on their intended competition purposes.
Based on the 911S, the 911 R was produced by Porsche to compete in the FIA’s GT 2.0 category. To make it competitive, the 911R was powered by a flat-six engine, Type 901/22 from the Porsche 906, capable of 210 hp. It went on a diet too, with weight savings coming from everywhere, getting the 911 R down to just 1,800 pounds dry. Four prototypes were constructed after which Porsche had coachbuilder Karl Baur build another 20 customer cars. In the end, because of the modifications to the 911R, the FIA refused to homologate the car.
