Porsche's New GT3 RS Cup Racer

Carrera cup car based on GT3 RS for the first time

Porsche has revealed the latest iteration of its 911 GT3 cup race car - and, for the first time, it's based on the GT3 RS rather than the 'stock' GT3.

The new GT3 Cup car will make its debut in the 2011 Carrera Cup GB series, and now basks in the title of 'best-selling race car of all time', with Porsche having shifted 1400 examples of it and its predecessors since 1998.

Thanks to its link to the GT3 RS road car, the new racer gets the 44mm-wider 911 bodywork, and the 3.8-litre flat-six. That gives the car 444bhp, 29bhp more than last year's 3.6-engined model, but the same as the road car.

The power is transmitted to the rear wheels via a sequential six-speed manual gearbox and a limited-slip differential, and the whole lot is 170kg lighter than the GT3 RS road car, so it should be pretty sharp on the track.

If you fancy a GT3 Cup, Porsche will sell you on for £94,600 plus VAT and deliveries to customers will begin in early 2011
2011 Porsche 911 GT3 Cup race car

Techspec
Body: Monocoque, hot-galvanised lightweight steel bodyshell; carbon-fibre doors with mirrors made of synthetic material; carbon-fibre rear lid; carbon-fibre rear wing, adjustable; welded-in safety cage; bucket racing seat; six-point seat belt; air jack; fire extinguisher with electronic release unit.

Engine: water-cooled, six-cylinder boxer engine; four-valve technology; bore 102.7mm; stroke 76.4 mm; 3,797 cc; compression ratio: 12.2:1
Output: 331 kW (450 hp) at 7,500 rpm; specific power output: 87.1 kW/litre (118.4 hp/litre); Max. engine speed 8,500 rpm.
Fuel: Super Plus unleaded
Electrical system: Motec ADL2 dashboard with integrated data recording; 12 volt battery (50 Ah); 15 A alternator; defect diagnosis/recognition; multi-point fuel injection (sequential); electronic Bosch MS 3.1 engine management; four-stage resonance intake manifold; racing exhaust system with regulated
Emitec racing catalytic converter; dry sump lubrication.

Transmission: Sequential six-speed dog-type gearbox (G97/63) with active oil cooling and splash oil lubrication; mechanical rear axle differential (37% / 52%); single mass flywheel; ZF Sachs racing clutch; hydraulic centre release mechanism; oil/water heat exchanger.

Suspension
Front: Spring strut axle (McPherson design, height adjustable); wheel bearing with double clamp; dual coil springs in race set-up; ZF Sachs gas pressure fixed-position dampers; front axle control arm with six-point suspension; two-piece lower control arms for camber adjustment; forged supporting Unibal mounts; longitudinal control bar; double blade type adjustable anti-roll bar (seven settings); tie-bar reinforced and infinitely adjustable; electro-hydraulic rack-and-pinion steering.

Rear: Multi-arm axle with axle supports fixed in position; spring struts adjustable for height; modified wheel bearings; dual coil springs with race set-up; ZF Sachs gas-pressure fixed-position dampers; two-piece lower control arms for camber adjustment; forged supporting Unibal mounts; longitudinal control bar; double blade type adjustable anti-roll bar (seven settings); tie-bar reinforced and infinitely adjustable.

Brakes: Two separate brake circuits, adjustable via a balance bar system; steel brake discs (compound molding); optimised brake air ducting.
Front: Brembo six piston aluminium fixed callipers; inner-vented discs measuring 380 mm in diameter; Pagid race brake pads.
Rear: Brembo four-piston aluminium fixed callipers; inner vented discs measuring 355 mm in diameter; Pagid race brake pads.

Wheels and Tyres:
Front: BBS 9.5J x 18 ET 37 with central bolt; Michelin racing tyres 24/64-18.
Rear: BBS 12J x 18 ET 30 with central bolt; Michelin racing tyres 27/68-18.

Weight: ca. 1,200 kg

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Matt UK

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