The engine of the 996 GT3 set it apart from most of the other Porsche 996 models, although it shared the same basic design of the standard so-called "integrated dry sump flat-six engine. The engine is naturally aspirated and based on the unit used in the Porsche 962 and Porsche 911 GT1 race cars. That engine was known as the 'Mezger' engine, after its designer Hans Mezger. The engine uses the original air-cooled 911's versatile dry-sump crankcase, with an external oil reservoir. The 996 GT3 has 360 PS (265 kW; 355 hp), compared to the 300 PS (221 kW; 296 hp) of the regular Porsche 996. In GT3 configuration, this so-called "split" crankcase (meaning the parting line of crankcase is on the crankshaft centreline) uses, instead of a fan and finned cylinders, separate water jackets added onto each side of the crankcase to cool banks of three cylinders with water pumped through a radiator. Thus, the GT3 engine is very similar to the completely water-cooled Porsche 962 racing car's engine, which is based on the same crankcase. The 962 differs, however, by using six individual cylinder heads while the GT1/GT3, like the air and water-cooled Porsche 959, uses two cylinder heads, each covering a bank of three cylinders. The GT3 engine could thus also be thought of as similar to a 959 engine, but with water-cooled cylinders. Up to early model year 2004 996 GT3 production, the basic casting used for the crankcase of the GT3 was the same as the air-cooled engine. The "964" casting number was visible on the bottom of the crankcase, and on areas normally machined in air-cooled applications, but not in water-cooled ones. The crankcase casting was changed in mid-2004 to a "996" casting number crankcase to eliminate these external air-cooled remnants, but internally it was the same.
Because the 911 air-cooled crankcase uses the Porsche 356 engine to transmission mounting flange configuration, the 996 GT3 used a manual gearbox also of air-cooled 911 heritage. This gearbox has interchangeable gear ratios and is more durable making it more suitable for racing than the standard 911 type 996 gearbox.
To bring the vehicle's track-prowess to the maximum level, Porsche endowed the GT3 with enlarged brakes, a lowered, re-tuned suspension system, lighter-weight wheels and a new front bumper with matched rear spoiler to help increase downforce, thereby increasing grip.
Porsche offered a no-cost option for the GT3 called the 'Clubsport' package. This option replaced the standard electrically adjustable leather front seats with manually adjustable racing buckets finished in fire-retardant fabric, single mass flywheel, bolt-in half-roll cage, 6-point drivers racing harness (also replacing the standard side airbags), fire extinguisher (mounted in the front passenger footwell) and preparation for a battery master switch. The Clubsport option was never offered to US customers, ostensibly due to the additional DOT crash testing that would have been required to allow US sales.
Porsche made significant updates to the GT3 for 2004 using the 2002 996 facelift including headlights that were differentiated from the Porsche Boxster. The 2004 version is commonly known as the 996.2 GT3. Horsepower was raised to 381 PS (280 kW) and torque to 284 lb⋅ft (385 N⋅m), 80% of which was available from 2,000 rpm. The braking setup was upgraded, now featuring 6-piston calipers on the front (rears remained 4-piston), and the Porsche Ceramic Composite Brake system was offered as an option.
In track testing by American automotive journals, the GT3 managed a 0-60 mph (97 km/h) time of 4.5 seconds and a quarter mile time of 12.0 seconds at 118 miles per hour (190 km/h). During skidpad testing the vehicle posted 1.03g.
Porsche's official test-driver Walter Röhrl completed the Nürburgring Nordschleife with the 996 GT3 in 7 minutes 56 seconds, a feat which was used by Porsche to promote the car.
It gives us great pleasure to present to you this formidable 42,000 miles, 2004, Porsche 996.2 GT3. The outside is finished in the stunning Black with the full GT3 Body Kit and GT3 specific 18-inch Alloy Wheels. Inside finds the electric Sports Seats trimmed in the GT3 Leather and the suede GT3 steering wheel. The specification of this race car obviously has weight in mind, however there are some luxury items that have been added - a Porsche CD Radio and Air Conditioning are two highlights.
This epic car has extensive documented history and is in incredible condition.
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- LayoutRear Engined
- Size3,600 cc
- AspirationNormally Aspirated
- Power381 bhp
- Torque284 lbs/ft
- Top speed190 mph
- Acceleration0 to 62 in 4.5 secs
- Driven WheelsRear Wheel Drive
- Economy21.9 mpg
- Body typeCoupe
- Emissions315 (g/km)
- Vehicle height1,275 mm
- Vehicle width1,808 mm
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