Porsche Announces 718 Cayman GT4 Clubsport

A new season means a new Porsche race car. Meet the Porsche 718 Cayman GT4 Clubsport, the latest track-ready version of their mid-engined sports car.

This new car will be available in two different flavors–think of them as spicy as well as even spicier. Both are powered by a 425-horsepower flat-six backed by a six-speed PDK transmission. Other standard features include a “swan neck” rear wing, welded-in roll cage, carbon noses and six-piston front brakes.

Something new and different, as spelled out in the Porsche release: “The driver and co-driver doors and the rear wing are made of an organic fiber mix, which are sourced primarily from agricultural by-products such as flax or hemp fibers and feature similar properties to carbon fiber in terms of weight and stiffness.”

The Trackday model is aimed at “ambitious amateur racing drivers,” Porsche says, and gets non-adjustable dampers, fixed brake bias and a hand-held fire extinguisher.

Porsche offers the Competition model for GT4-level racing, which in the States includes the IMSA Michelin Pilot Challenge GS class as well as Pirelli GT4 America, the series formerly known as World Challenge. The Competition model receives adjustable dampers, adjustable brake bias, fire-suppression system and increased fuel capacity. Its quick-release steering wheel comes from the 911 GT3 R.

Pricing for the Competition is $189,000. The price for the Trackday version will be announced later.

Look for the cars to make their U.S. track debut this weekend at the Roar Before the Rolex 24, IMSA pre-season test at Daytona International Speedway.

Technical description, Porsche 718 Cayman GT4 Clubsport (Type 982)

Concept:
• Single-seater, near-standard production-based race car, not road homologated

Engine:
• Aluminum six-cylinder mid-positioned boxer engine with rigid mounting
• 3,800 cc; stroke 77.5 mm, bore 102 mm
• Max. power: 313 kW (425 hp) at 7,500 rpm
• Max. rpm: 7,800 rpm
• Max. torque: 425 Nm at 6,600 rpm
• Compression ratio: 12.5:1
• Racing optimized water cooling with thermal management for engine and gearbox
• Four-valve technology with adjustable camshaft phasing and variable valve timing VarioCam Plus
• Fuel quality: Super Plus unleaded, minimum 98 octane
• Racing optimized electronic engine management (Continental SDI 9)
• Integrated dry sump lubrication
• 100-cell metal catalytic converter complying with DMSB specifications

Transmission:
• Rear wheel drive
• 6-speed PDK gearbox with rigid suspension and electronic control unit optimized for racing
• Reinforced dual mass flywheel
• Internal pressure oil lubrication with active oil cooling
• Differential lock optimized for racing

Bodywork:
• Lightweight body in aluminum-steel composite construction
• Welded-in roll-cage, certified according to FIA Art. 277
• Front bonnet with quick release fasteners
• Rear hood with quick release fasteners
• Fixed rear wing with “swan neck” mount made of natural-fiber composite materials, including the side blades, black aluminum wing supports with integrated carbon fiber Gurney flap
• Driver and co-driver doors of natural-fiber composite materials
• Roof including escape hatch, certified according to FIA Art. 275a
• Recaro race bucket seat with longitudinal adjustment and padding system, adjustable to the individual needs of the drivers (in accordance with FIA Standard 8862/2009 – the latest FIA requirements)
• Three-piston air jack system (“Competition”)
• Pre-installed mounting points for three-piston air jack system (“Trackday”)
• Provision for safety net
FIA-certified towing loops, front and rear
• Motorsport center console with enhanced functionality and adapted usability
• Six-point safety harness
• 30.3 gallon (115-liter) FT3 safety fuel cell with “Fuel Cut Off” safety valve complying with FIA regulations (“Competition”)
• 21.1 gallon (80-liter) FT3 safety fuel cell with “Fuel Cut Off” safety valve complying with FIA regulations (“Trackday”)

Suspension:
Front axle:
• MacPherson suspension strut, adjustable in height, camber and track
• Forged suspension links: optimized stiffness, double shear mounting, high-performance spherical bearings
• 5-bolt wheel hubs
• Racing 3-way shock absorbers with rebound and 2-stage compression adjust-ment, high and low speed (“Competition”)
• Fixed shock absorbers (“Trackday”)
• Electromechanical power steering with variable steering ratio
• Anti-roll bar, 3-hole design

Rear axle:
• MacPherson suspension strut, adjustable in height, camber and track
• Forged suspension links: optimized stiffness, double shear mounting, high-performance spherical bearings
• 5-bolt wheel hubs
• Racing 3-way shock absorbers with rebound and 2-stage compression adjustment, high and low speed (“Competition”)
• Fixed shock absorbers (“Trackday”)
• Adjustable blade-type anti-roll bar

Brake system:
Front axle:
• Aluminum, mono-bloc six-piston racing calipers with “Anti Knock Back” piston springs
• Steel brake discs, multi-piece, ventilated and grooved, 380 mm diameter
• Racing brake pads
• Brake balance adjustment via a balance bar system (“Competition”)
• Brake booster (“Trackday”)

Rear axle:
• Aluminum, mono-bloc four-piston racing calipers with “Anti Knock Back” piston springs
• Steel brake discs, multi-piece, ventilated and grooved, 380 mm diameter
• Racing brake pads
• Brake balance adjustment via a balance bar system (“Competition”)
• Brake booster (“Trackday”)

Electronics:
COSWORTH instrument cluster ICD with integrated data logger
• Upgraded fault diagnosis with PIWIS motorsport tester
• Porsche Track Precision Race App
• Integrated lap trigger via GPS signal
• Electronic throttle system
• Lightweight lithium-ion (LiFePo) battery, 60 Ah, leak-proof, mounted in passenger footwell (“Competition”)
• Battery 12 V, 70 Ah (AGM), leak-proof, mounted in passenger footwell (“Trackday”)
• Emergency cut-off switch in cockpit and outside left of the windscreen
• Driving stability system PSM (Porsche Stability Management) with ABS, Traction Control (TC) and Electronic Stability Control (ESC), able to be completely deactivated
• Tire pressure monitoring system (TPMS)
• Central fire extinguishing system in accordance with FIA regulations (“Competition”)
• Handheld fire extinguisher (“Trackday”)
• Air conditioning
• Electric wing mirror adjustment
• Multifunctional CFRP motorsport steering wheel with pit speed limiter and quick release coupling (“Competition”)
• Multifunctional motorsport steering wheel with pit speed limiter (“Trackday”)
• Centre console with map switch to adjust the ABS, ESC, TC and switch be-tween preset tire circumferences

Weight/dimensions:
• Total weight: 2,910 lbs (1,320 kg)
• Total length: 175.43 inches (4,456 mm)
• Total width: 70 inches (1,778 mm)
• Total height: 48.74 inches (1,238 mm)
• Wheelbase: 96.69 inches (2,456 mm)

Wheels/Tires:
Front axle:
• One-piece light-alloy forged wheels in new weight-optimized rim design, 9J x 18 offset 28 with 5-bolt mounting
• Delivered with Michelin transportation tires, dimension: 25/64-18
• Michelin slick/wet tires, dimension: 25/64-18

Rear axle:
• One-piece light-alloy forged wheel in new weight-optimized rim design, 10.5J x 18.5 offset 53 with 5-bolt mounting
• Delivered with Michelin transportation tires, dimension: 27/68-18
• Michelin slick/wet tires, dimension: 27/68-18

Colors:
• Water-based paint
• Exterior: white C9A
• Interior: white filler-coat, without lacquer

Delivery:
Germany from February 2019 – North America, Calendar Week 35

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Comments
View comments on the GRM forums
secretariata
secretariata SuperDork
1/3/19 4:07 p.m.

Single seater with a "co-driver" door?  Is the co-driver moveable ballast like the sidecar racers at Isle of Man? Porsche might want to clarify their press material... ;)

David S. Wallens
David S. Wallens Editorial Director
1/4/19 9:40 a.m.
secretariata said:

Single seater with a "co-driver" door?  Is the co-driver moveable ballast like the sidecar racers at Isle of Man? Porsche might want to clarify their press material... ;)

Maybe it's something like this.

David S. Wallens
David S. Wallens Editorial Director
1/4/19 9:44 a.m.

Also, look for a little extra Cayman GT4 editorial in the near future. Our friends (and neighbors) at BGB Motorsports already have one. 

The cars come from Porsche "ready-to-race," but the team still has some work to do before the Rolex weekend: mainly add driver cooling, wrap the graphics, add the IMSA position lights. We'll stop by their shop and report back. 

z31maniac
z31maniac MegaDork
1/4/19 9:47 a.m.

I find the 6spd PDK interesting. 

Every Porsche/Audi/BMW dual-clutch transmission I've seen has been a 7 spd?

David S. Wallens
David S. Wallens Editorial Director
1/4/19 9:57 a.m.

The previous GT4 also received a six-speed PDK. (I just checked because, to be honest, I couldn't remember for sure.)

David S. Wallens
David S. Wallens Editorial Director
1/4/19 10:11 a.m.

Also, hope that at least someone here appreciated the Cannonball Run clip. 

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