#59 Brumos Racing Porsche 911 GT3 Rolex Cup – 2011 Grand-Am Rolex Series
The development of the new 2011 Porsche 911 GT3 GRAND-AM Rolex Cup car, available for the first time since 2009, has been a unique collaboration between Porsche engineers at the factory in Germany (Porsche AG) and the technical experts at Porsche Motorsport North America (PMNA).
The objective was to create a competitive new car that provides longevity, versatility and a degree of flexibility for the customers planning to compete in the GRAND-AM Rolex Sports Car Series presented by Crown Royal Cask No. 16. This car has some significant improvements compared to its predecessor, the 2009 GRAND-AM Rolex Cup car, such as fully adjustable suspension to optimize handling and tire wear. The brake system was upgraded and includes an endurance brake cooling package for long-distance races. Furthermore, the exhaust system received a substantial weight reduction.
Porsche 911 GT3 Cup – 2009 Grand-Am Rolex Series
The latest version of sports car racing’s most dominant competitor. Taken to its highest level.
The Grand-Am version of the GT3 Cup is modified to maximize its performance on the North American tracks that make-up the Rolex series.
Unique aerodynamic changes enable the car to excel on everything from the tight road course at Lime Rock to the high banking of Daytona. With all competitors running the same spec tire manufactured by Pirelli, suspension settings are a key element to success in the series.
Specifications:
Engine:
- water cooled flat six-cylinder boxer engine
- 3,598 cc; stroke 76.4 mm; bore 99.98 mm diameter
- max. power: SAE 425 PS
- max. torque: 420 Nm
- four valves per cylinder
- dry-sump lubrication
- two-stage resonance intake manifold, central inlet air duct
- electronic engine management system MS 3.1
- sequential multi-point fuel injection
- required fuel quality: 98 octane ROZ, unleaded
- race exhaust system in accordance with the GrandAm Series Regulations
Transmission:
- six-speed sequential dog-type gearbox
- gear ratios: ring & pinion gear 8/32 i = 4.00 1st gear 12/38 i = 3.16 2nd gear 15/32 i = 2.13
3rd gear 18/31 i = 1.72 4th gear 20/28 i = 1.40 5th gear 23/26 i = 1.13 6th gear 29/27 i = 0.93
- pressure-oil lubrication
- oil-water heat exchanger
- single-mass flywheel
- hydraulic clutch centre-release mechanism
- 5 1/2 in triple-disc sintered-metal clutch
- limited slip differential 40/60 %
- differential case similar to 911 GT3 RSR (997)
- rear-wheel drive
Bodywork:
- self-supporting body shell made out of galvanized sheet steel
- carbon fiber rear lid
- wing supports for the GrandAm standard rear wing
- welded-in roll cage incl. shoulder- and door bar
- air jack system with controllable discharge
- aerodynamically optimized front bumper and front spoiler edge
- carbon fiber front and rear bumpers
- carbon fiber fenders
- racing seat (driver side only) with fire retardant upholstery
- six-point seat belt (optimized for HANS)
- removable steering wheel (with quick-release coupling)
- electric fire extinguishing system
- wiper system similar to 911 GT3 RSR (997)
- preparation for additional oil tank
- 100 liter FT3 fuel tank
Suspension:
Front axle:
- McPherson strut-type axle
- all struts supported by Unibal
- adjustable trailing arms
- Sachs gas pressure shock absorbers
- double coil springs (main spring and helper spring)
- two-piece lower control arms for camber adjustment
- blade-type anti-roll bar
- damper mounted to upright with twin-clamp system
- power steering with electro-hydraulic pressure feed
Rear axle:
- multilink rear suspension with solidly mounted sub frame
- all struts supported by Unibal
- adjustable trailing arms
- Sachs gas pressure shock absorbers
- double coil springs (main spring and helper spring)
- two-piece lower control arms for camber adjustment
- reinforced, continuously variable rear axle track rod
- blade-type anti-roll bar
- suspension continuously variable (height, camber, track)
Brake System:
- Brake system with adjustable bias bar
Front axle:
- aluminum six-piston calipers in accordance with the 2008 GrandAm Rolex Series Regulations
- internally vented brake discs, 380 mm diameter, race brake pads
Rear axle:
- aluminum four-piston calipers in accordance with the 2007 GrandAm Rolex Series Regulations
- internally vented brake discs, 355 mm diameter, race brake pad
Rims/Tires:
Front axle:
- three-piece BBS aluminum rims (10J x 18)
Rear axle:
- three-piece BBS aluminum rims (12J x 18)
Porsche 911 GT3 RSR
The most potent 911-based race car ever.
For 2009, Porsche has manged to improve the car that won it all in 2008, including the Manufacturer’s Championship.
Specifications:
Engine:
- Capacity: 3996 cc (stroke 80.44 mm, bore 102.7 mm diameter)
- Max. power: 450 hp at 7900 rpm (restrictor change)
- Max. torque: 450 Nm at 7250 rpm
- Max. 9000 rpm
- Restrictor: 2 x 28.6 mm diameter
- Required fuel quality: 98 octane ROZ, unleaded
- Dry-sump lubrication
- Race exhaust system and rear muffler with twin-branch exhaust tailpipe centered in accordance with ACO or FIA
- Sequential multi-point fuel injection
Power Train:
- Porsche six-speed sequential gearbox (G97/70) with active oil cooling and internal pressure-oil lubrication
- Gear ratios: Bevel crown wheel 9/26 i = 2.889 1st gear 13/41 i = 3.154 2nd gear 16/39 i = 2.438
3rd gear 18/36 i = 2.000 4th gear 22/36 i = 1.636 5th gear 24/33 i = 1.375 6th gear 25/29 i = 1.160
- Limited slip differential 40/60 per cent
- Single-mass flywheel
- Racing clutch (5.5 triple-disc carbon clutch / hydraulic clutch center-release mechanism)
- Oil-water heat exchanger
- Rear-wheel drive
Rims / Tires:
Front axle:
- Three-piece BBS light aluminum rims 11J x 18 offset 34 mm with central locking wheel nuts
- Michelin rain tires 27/65-18
Rear axle:
- Three-piece BBS light aluminum rims 13J x 18 offset 12.5 mm with central locking wheel nuts
- Michelin rain tires 31/71-18
Bodywork:
- Weight-optimized through add-on parts (carbon/kevlar fiber) widened 911 GT3 RS bodywork
- Aerodynamically optimized front bumper and front spoiler edge
- Optimized air routing in the nose area
- Carbon fiber doors with window frame and plastic rear-view mirrors
- Carbon fiber rear lid with adjustable rear wing
- Optimized adjustment range of the rear wing
- Optimized carbon fiber rear bumper (modified for air exhaust)
- Air-jack system
- Reinforced welded-in roll cage
- New air-conditioning system / redesigned features
- Air intake luggage compartment
- Driver compartment – Bulk head (carbon fiber)
- Optimized interior ventilation
- Underfloor optimization
- Racing seat /driver side only) with fire retardant upholstery
- Six-point seat belt (red), optimized for use with HANS system
- Removable steering wheel (with quick-decoupler)
- Electric fire extinguishing system
- 90 liter fuel tank (FT-3 safety fuel tank)
- Restyled aerodynamics for 2009
Suspension:
Front axle:
- Height-adjustable McPherson strut-type axle with adjustable spring mount and damper setting
- Sachs gas pressure shock absorbers (Through Rod)
- Double coil springs (main spring and helper spring)
- Front axle link for camber adjustment
- Bilateral blade-type anti-roll bar
- Reinforced front axle cross rail
- Power steering with electro-hydraulic pressure feed
- Forged supporting mounts
Rear axle:
- Height-adjustable multilink rear suspension with solidly mounted subframe and adjustable spring mount and
damper setting
- Sachs gas pressure shock absorbers (Through Rod)
- Double coil springs (main spring and helper spring)
- Forged, two-piece lower control arms for with camber adjustment
- Reinforced, continuously variable rear axle track rod
- Bilateral blade-type anti-roll bar
Brake System:
- Brake system with adjustable bias bar
Front axle:
- Single-piece aluminum six-piston caliper
- Steel brake discs with aluminum pot, 380 mm diameter
- Race brake pads
Rear axle:
- Single-piece aluminum four-piston caliper
- Steel brake discs with aluminum pot, 355 mm diameter
- Race brake pads
Electronics:
- Motec display with integrated data recording
- Motec PDM – programmable multifunctional on-board electrics control box
- Motec SLM – multifunctional display with integrated shift-point control
- Bosch Memory Kit (without license)
- Battery: 12 Volt, 50 Ah
- 140 Ah generator
- Lightweight wiring harness
Vehicle Weight: Approx. 1225 kg ACO / 1200 kg FIA
Vehicle Measurements:
- Length: Approx. 4443 mm
- Width: Approx. 1957 mm
- Height: Approx. 1300 mm (chassis clearance 70 mm minimum)