Historical:
996 GT3:
The first version of the Porsche 911 GT3 was presented at the Geneva Motor Show in 1999, when a no-frills ClubSport Gray Glacier model (no leather pack, no air conditioning) is presented in parallel to the 911 GT3 SuperCup. It is then equipped with a boxer 6 cylinders of 3.6 L of 360 ch DIN1. The car is popular with the press and the customers of the brand, which push Porsche to produce it in 3 successive runs over 2 model years (2000 and 2001).
A promotional video clip entitled 911 GT3 Nürburgring Nordschleife: 7.56,33 min. Presents the features of the car while showing Walter Röhrl bucking a lap in 7: 56.33 on the Nürburgring North Loop. The GT3 will then be considered the first production car to fall below 8 minutes in this exercise.
It is presented in issue 278 (May 1999) of the brand magazine, Christophorus.
In total, 1,858 copies of the 996 GT3 MKI are produced, of which 308 are with right-hand drive. It is assembled within the Motorsport department in Weissach.
Bodywork :
The body of the 996 GT3 MKI was already pre-tested before the presentation of the model, due to the Supercup model as well as various models featuring the Porsche Exclusive / Porsche Tequipment accessories ("Aerodynamic Kit"). Compared to a standard 996 Carrera, there are:
A more enveloping front bumper, with a protective plastic blade (to be considered consumable because of the height of the box).
Profiled sill panels.
A fixed rear hood, on which is mounted a biplane "banana" or "crab claw", which is adjustable in 6 positions.
The case itself is a mix between the Carrera and the Carrera 4, however, due to the lightweight optics of the model, the anti-corrosion protection under the body is not so advanced.
Colors :
Its official presentation color is the Red Zanzibar (L1A8 - Orangerot Perl Metallic / Zanzibar Red), it is the color present most often on the advertisements of the time as well as on the cover of maintenance books. It is also officially presented in other colors (press photos): Gris Glacier (L92U - Arktissilber / Arctic Silver Metallic), Indian Red (L84A - Indischrot / Guards Red) and Yellow Speed (L12H - Speedgelb - Speed Yellow). The French press will most often try a copy painted in Indian Red.
Engine :
It is the competition department, Porsche Motorsport, which drives the management of the plant to develop a real engine with dry sump. Derived from the engine of the Porsche GT1, the M96 / 76 engine finally sees the day, and has the following main characteristics:
6 cylinders flat, total cylinder capacity 3 600 cm3
4 valves per cylinder, DOHC distribution per chain, Porsche VarioCam
Bore × stroke: 100 mm × 76.4 mm
Maximum power (kW / hp): 265/360 at 7,200 rpm
Maximum torque: 370 Nm at 5,500 rpm
Multi-point sequential injection Bosch DME / Motronic M 5.5.5.
Ignition sequence: 1-6-2-4-3-5
Transmission :
Box Getrag G 96/90 derived from the box of the 993 GT2. 6 interchangeable mechanical ratios (spline mounting) + reverse gear with traditional H-box control. The box control has often been denounced by the press which would have preferred a rod drive instead of the cabled control mounted on it model. The 2001 model year brings changes to the synchros that are now made of steel for the 3/4/5 ratios (the synchros are originally made of bronze). Growth of reports:
1st: 3.82
2nd: 2.15
3e: 1.56
4e: 1.21
5th: 0.97
6th: 0.83
Reverse: 2.86
Axle Ratio: 3.44. Many owners took advantage of a change of clutch to raise a "short bridge", which in fact corresponds to the bridge ratio of the Cup / Supercup model.
Limited slip differential: 40% / 60%
Moving trains :
The 996 GT3 MKI is supplied as standard with 3-piece BBS wheels in 8x18 for the front (225/40/18) and 10 × 18 for the rear (285/30/18) and mounted in Pirelli P- Zero Red. This will push Michelin to update its Pilot Sport tire (which becomes the OEM mount on the GT3 MK2) and even to develop a specific tire very typical track: the Pilot Sport Cup.
The body height as well as the camber are fully adjustable, as are the anti-roll bars.
The brakes are Brembo with monoblock calipers with 4 front and rear pistons, which pinch ventilated drilled steel discs of 330 mm × 34 mm at the front and 330 mm × 28 mm at the rear. A Bosch 5.3 ABS system comes in assistance, it is the only electronic assistance present on the car.
On the 996 GT3 MKII, the main modification is the larger rims (8.5 × 18 and 11 × 18) and now monoblock, brake calipers that move to 6 pistons at the front, as well as suspensions adjustments again reviewed More firm.
The Clubsport preparation M003 :
The option code "003" implies the following modifications to the 911 996 GT3 MKI:
Preparation of the body for the installation of a roll bar.
Removing side airbags (in doors).
Installation of an interior cut-off system (switch on the front of the box control) and outside ("pull" at the front cover and windscreen junction on the left side of the car).
Installation of a 6-point bolted cage arch (supplier: Matter GmbH, then IVM Automotive).
Installation of a powder fire extinguisher in front of the passenger seat (supplier: A.Werner GmbH).
The bucket seats are now covered with flame retardant fabrics (supplier: Recaro Automotive GmbH).
Schroth Profi II-6 6-point safety harness (supplier: Schroth Safety Products GmbH)
Installation of a lightweight flywheel (single-mass balancing).
On the 996 GT3 MKII, the M003 modifications are less advanced: the side airbags are still present, the single-mass flywheel disappears, and the circuit breakers are no longer fully assembled (the central and internal battery cutters were Delivered in a box with the car). The 996 GT3 RS must be waited for to get a level of preparation identical to the MKI.
Apart from the Clubsport preparation, the car radio as well as the air conditioning system could be de-optioned to order.
996 GT3 MKII (2003-2005) :
In 2003, the 996 GT3 returns in a "Phase II" version, which includes the following modifications:
The case includes the optics of the 996 Carrera 4S, Turbo and GT2.
The aerodynamic kit sees its modified style.
The engine power increases from 360 to 381 hp.
The throttle is no longer in direct drive with cable, but of the "eGas" type.
Like the MKI produced in 2001, the box incorporates reinforced steel sync on the 3/4/5 ratios.
The suspensions are revised with even firmer tar- gets.
The brakes go to 6-piston clamps at the front, the ceramic brake option becomes available in 2004 (PCCB, option M450).
The monobloc rims increase in width, they wear 235/40/18 in the front and 295/30/18 in the rear.
The cabin now offers a glove compartment.
It is now produced on the main production line in Zuffenhausen. Its distribution is greater and the car is now approved for the North American market (although the car is not sold with buckets, and option M003 is not available).
Mécanique:
The current engine is a liquid-cooled flat-six, with a cylinder capacity of 3.8L developing 475 hp (320 kW) at 7,500 rpm. Capable of reaching a maximum speed of 9,000 rpm, this one is an evolution of the block of the 991 Carrera S, unlike the older generation of GT3 which they had disposed of the block Mezger coming from the GT1 of Le Mans. This block weighs 25 kg less than the previous one, thanks in particular to aluminum pistons, valves controls by oscillating levers or titanium rods.
Engine:
Number of cylinders: 6
Displacement: 3 797 cm3 (3 996 cm3 for the version 4.0 L)
Engine design:
rear engine
Power: 475 hp (320 kW) at 7,600 rpm (500 hp at 8,250 rpm for the 4.0 L version)
Maximum torque: 430 Nm at 6,250 rpm (460 Nm at 5,750 rpm for the 4.0 L version)
Compression ratio: 12.0: 1 (12.6: 1 for the version 4.0 L)
Load cycle: variable intake system with double resonance valve
Performances :
Maximum speed: 315 km / h (310 km / h for the version 4.0 L)
Acceleration from 0 to 100 km / h: 4.1 s (3.9 s for the version 4.0 L)
Recovery (80-120 km / h) on the penultimate report: 5.9 s (5th report) (4.8 s for the 4.0 L version, 5th report)
Transmission:
Design of transmission: propulsion
Manual gearbox: 7-speed pdk gearbox
Dimensions:
Length: 4,465 mm
Width: 1,808 mm
Height: 1280 mm
Wheelbase: 2,355 mm
Coefficient of Penetration (Cx): 0.32
Unladen weight (DIN): 1,395 kg
Curb weight (EC): 1,470 kg
Total weight allowed: 1,680 kg
Tank volume: 67 liters, standard
Consumption Announced :
Urban Cycle (100 L / km): 19.2 L / 100km
Extra-urban cycle (100 L / km): 9 L / 100km
Mixed cycle (100 L / km): 12.6 L / 100km
CO2 emission (g / km): 298 g (combined cycle)
Modèl hybride:
A model of hybrid competition will be presented at the 2010 Geneva Motor Show. In addition to its internal combustion engine, it boasts an SREC system consisting of two electric motors of 60 kW each, powered by a flywheel capable of rotating at 40 000 rpm during the braking phases. The system could provide up to an additional 164 bhp for periods of 6 to 8 seconds6. The technology was developed by the British Williams Hybrid Power7, a subsidiary of the Formula 1 Williams F1 team. The car will be hired to compete for the 24 hours of the Nürburgring 20106.
On May 28, 2011, the winner of the fourth race of the VLN championship season was the Porsche 911 GT3 R Hybrid, led by Richard Lietz, Marco Holzer and Patrick Long. This is the first victory of a hybrid car in a major car competition8.
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