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2003 GT3 RS specfications

Concept

Porsche 911 GT3 RS
single-seated, near-standard race vehicle
2003 Vehicle Description accordance with ACO-Regulations or the 2001 FIA-Regulations
basis: 911 GT3

Engine

flat six-cylinder boxer engine
water-cooled 3.598 cc, stroke 76.4 mm, bore 99.99 mm dia.
max. torque: 395 Nm at 7,200 rpm
max. power: 320 kW (435 BHP) at 8,250 rpm with 2 x 30.8 mm dia. restrictors in FIA version (power ratings in ACO version: at request)
max. rpm: 8.500 rpm four-valve technology
oil-cooler (oil-water heat exchanger)
dry-sump lubrication under pressure oil and cooling water refilling system
intake manifold with single throttle valve, with 2 x 30.8 mm dia. restrictor
electronic engine management system MS 3.1 Bosch MS 3.1 fuel injection with ignition control
required fuel quality: 98 octane ROZ, unleaded
race exhaust: multiple pipe manifold, open exhaust, no catalytic converter (rear exhaust muffler retrofit)

Power Train

six-speed manual transmission
gear ratios (as delivered):
ring & pinion gear 7/35
1st gear 13/41
2nd gear 20/40
3rd gear 25/39
4th gear 29/36
5th gear 32/33
6th gear 35/30
oil-water heat exchanger
single-mass flywheel with douple-disc race clutch
limited slip differential 40/60 per cent
rear-wheel drive

Bodywork

weight optimized and widened 911 chassis with fiberglass rear fender flares (front end, front lid, front fenders, doors, rear lid, rear window anddade and rear end made out of carbon/cevlar fibre) welded-in roll cage three-point air jack system
aerodynamically optimized front and rear part
aerodynamically optimized side sills adjustable rear wing racing bucket seat (driver side only) with fire retardant upholstery
six-point seat belt
removable steering wheel (quick-connect coupling)
fire extinguishing system 100 litre FT3 safety fuel tank with quick refuelling system

Vehicle Weight

approx.. 1,100 kg

Suspension

McPherson front axle with ball joints and corresponding changes of kinematics (according to ACO or FIA-Regulations) front roll bar, adjustable lever arm system power steering multilink rear suspension with ball joints and corresponding changes of kinematics (according to ACO or FIA-Regulations) rear roll bar, adjustable lever arm system double coil springs in front and rear adjustable in four different positions front and rear struts with adjustable Sachs shock absorbers suspension continuously variable adjustable (heights, camber, track)

Rims/Tires

Front axle: three-piece BBS light alloy rims (10J x 18 ET 1,5) with central, self-locking wheel nuts
Michelin rain tyres 24/64-18
Rear axle: three-piece BBS light alloy rims (11J x 18 ET 16) with central, self-locking wheel nuts
Michelin rain tyres 27/68-18

Brake System

without ABS, brake force balance adjustable by brake balance bar
four-piston fixed brake caliper in the front, internally vented discs, brake disc diameter: 380 mm, race brake pads
four-piston fixed brake caliper in the rear, internally vented discs, brake disc diameter: 355 mm, race brake pads

Electrics

Bosch MS 3.1 engine management Motec display with integrated data recording
battery: 12 Volt, 50 Ah
additional ventilation for driver (fan)
120 Ah generator

Production Figure - 20 cars

2003 GT3 RS

very similar to the previous 2002 model car. It came out of the box running.

The car pictured above won the 2003 Daytona 24 Hours overall. Pictures are from the race.

Driven by:

Schrom/Buckler/Bergmeister/Bernhard

2003 GT3 RS door

the most visable change to the car was this one piece door, the windowframe, and door were incorporated into one. Similar to the 993 GT2 Evo door.

2003 GT3 RS engine

very familiar GT3R. the addition of a light weight cooling system was adapted to the 3.6 L. An alternator change, water system attached to the engine was also modifed. Air cleaner was mounted in the decklid/tail from this point forward.

2003 GT3 RS frontal area

As the GT3 R as matured so have the details, actual ducting for the center radiator, is apparent. Also note the front bumper mounts made from metal, as the earlier cars were supplied with modified 996 street plastic brackets.