Cayman GT4 Clubsport
Securing four victories in the hotly-contested IMSA Continental Tire SportsCar Challenge, the new Cayman GT4 Clubsport celebrated a successful maiden season on the most demanding racetracks of America. The new clubsport racer from Weissach, which has also underlined its potential in other racing series, was added to the broad range of Porsche racing vehicles in 2016.
With the near-standard vehicle positioned just below the 911 GT3 Cup, the production-based Cayman GT4 Clubsport caters for ambitious amateur racing driver as well as hobby racers, for whom the joy of competing on the racetrack stands in the forefront. The 283 kW (385 hp) mid-engine racer for motorsport novices is not road homologated and is based on the successful street-legal Cayman GT4. Like its race-worthy production sibling, the Cayman GT4 Clubsport is powered by a 3.8-litre flat-six engine mounted directly behind the driver’s seat. The racing version exclusively features a modified six-speed Porsche double clutch transmission with shift paddles on the steering wheel and a mechanical rear-axle locking differential specifically for racing.
The lightweight strut front axle is taken from its big 911 GT3 Cup brother, which is campaigned in Porsche’s 20 one-make championships around the world. Working at the rear is an enhanced lightweight strut suspension with transverse arms adopted from the 911 GT3 Cup. The impressively dimensioned racing brake system features 380-millimetre steel brake discs all round. Fitted at the front are one-piece, six-piston aluminium fixed callipers, with a four-piston equivalent at the rear. The anti-lock brake system can be adjusted in twelve stages. The Electronic Stability Programme has been adapted for slicks. The power steering is operated electro-mechanically.
An uncompromising lightweight
Tipping the scales at just 1,300 kilograms, the Cayman GT4 Clubsport, delivered ex-works with a welded-in safety cage, a racing bucket seat as well as a six-point harness, is truly lightweight. The basic version is equipped with a 90-litre standard tank, with an optional 70-litre or 100-litre FT3 safety tank available. Mounted at the front axle are 18-inch five-bolt forged rims with Michelin tyres (25/64-18), with 18-inch five-bolt forged rims at the rear with 27/68-18 tyre dimensions.
The new Cayman GT4 Clubsport, which is available from 111,000 euro plus country-specific VAT, can be ordered from Porsche Motorsport in Weissach. For the 2017 season, the vehicle will be campaigned in racing series such as the VLN Long Distance Championship Nürburgring, the SRO GT4 series, the Pirelli GT3 Cup Trophy USA, the Ultra 94 GT3 Cup Challenge Canada and in club races run by the Porsche Club of America, as well as other club-level meetings around the world.
|Engine||Aluminium six-cylinder mid-mounted boxer engine, rigid mounting; 3,800 cc; stroke 76.4 mm; bore 102.7 mm; max. power: 283 kW (385 hp) at 7,400 rpm; max. rpm: 7,800; max. torque: 420 Nm at 4,750 – 6,000 rpm; compression ratio: 12.5 : 1; water cooling with thermal management for engine and gearbox; four valves per cylinder, adjustable camshaft phasing and variable valve timing VarioCam Plus; sequential multi-point fuel injection; fuel quality: minimum 98 octane, unleaded; dry-sump lubrication; electronic engine management (Continental SDI 9); 100-cell metal catalytic converter complying with DMSB specifications; rear silencer with central tailpipes; variable intake system with adjustable resonance butterflies; twin pipe sport exhaust system featuring two central tailpipes.|
|Transmission||Rear wheel drive; rigidly mounted six-speed PDK-gearbox (DCT, dual clutch transmission); limited slip differential optimised for racing; dual mass flywheel.|
|Bodywork||Lightweight bodywork with aluminium-steel composite construction; fully integrated roll-cage complying with FIA Homologation Regulations for safety cages; front bonnet with quick release fasteners; rear deck with quick release fasteners; fixed carbon rear wing with side blades, black aluminium wing support with integrated Gurney flap; modified Cayman GT4 cockpit: Porsche motorsport steering wheel, Alcantara covered, integrated shift paddles; motorsport centre console with typical Porsche switch layout; crash protected, lightweight battery and optimised ECU position; OMP racing bucket seat with longitudinal adjustment (in accordance with FIA requirements); six-point safety harness; FIA-certified towing loops at front and rear; portable fire extinguisher; pre-installed mounting points for on-board three-piston air jack; preparation for central fire extinguisher system. Optional: 70 litre FT3 safety fuel cell with ‘Fuel Cut Off’ safety valve according to FIA regulations. Optional: 100 litre FT3 safety fuel cell with ‘Fuel Cut Off’ safety valve according to FIA regulations. Optional: Recaro racing bucket seat with longitudinal adjustment and individual padding system (in accordance with FIA standard 8862/2009 – latest FIA requirements).|
|Suspension||Front axle: McPherson suspension strut; forged suspension links: Optimised stiffness; double shear mounting; high-performance spherical bearings; 5 bolt wheel hubs; Motorsport shock absorbers, adjustable ride height (rebound/compression characteristics fixed); reinforced track rods; electro-hydraulic power steering with variable steering ratio and steering impulse; modified anti-roll bar.
Rear axle: McPherson suspension strut; forged suspension links: Optimised stiffness; double shear mounting; high-performance spherical bearings; 5 bolt wheel hubs; Motorsport shock absorbers, adjustable ride height (rebound/compression characteristics fixed).
|Brake system||Front axle: Aluminium, mono-bloc six-piston racing callipers with ‘anti knock back’ piston springs; ventilated and grooved 380 mm steel brake discs; Motorsport brake pads; optimised brake cooling duct layout.
Rear axle: Aluminium, mono-bloc four-piston racing callipers with ‘anti knock back’ piston springs; ventilated and grooved 380 mm steel brake discs; Motorsport brake pads; optimised brake cooling duct layout.
|Rims/Tyres||Front axle: One piece forged alloy rims, 9J x 18, offset 28 mm, 5 bolt mounting; Michelin transportation tyres; dimensions: 25/64-18.
Rear axle: One-piece forged alloy rims, 10.5J x 18, offset 53, 5 bolt mounting; Michelin transportation tyres; dimensions: 27/68-18.
|Electrics||Porsche GT4 instrument cluster including typical motorsport display elements; Porsche Track Precision Race App with provision for a lap trigger; drive-by-wire throttle system; battery 12 V, 70 Ah (AGM), leak-proof, mounted in passenger footwell; electric windows; emergency switch in cockpit and exterior emergency switch at lower left of windscreen frame. Lighting system: Main headlights with H7 technology; LED rear lighting system; electronic dynamic stability system PSM (Porsche Stability Management) with ABS, traction control and electronic stability control can be deactivated. Tyre pressure monitoring system (TPMS). Optional: air conditioning.|
|Weight/Dimensions||Total weight: approx. 1,300 kg; total length: 4,438 mm; total width: 1,817 mm; total height: 1,266 mm; aerodynamic drag coefficient: cw = 0.32; wheelbase: 2,484 mm.|
|Colours||Water-based paint; exterior: white C9A; interior: white filler-coat, without lacquer.|