The Manthey Racing Team will make ready couple of Type 997-based Porsche 911 GT3 RSRs. Built on the latest Porsche 911 GT3 RS, the new Porsche RSR’s 3.8 liter six-cylinder is makes 485 horsepower at 8,400 RPM with a pair of mandatory 30mmm air restrictors in place. Torque peak is 435 Nm at 7,250 rpm.
Technical description: Porsche 911 GT3 RSR
Concept
Single-seater, near-standard racing sportscar
Basis: 911 GT3 RS
Homologation: Spa 24 Hours Group 2 (national championship), respectively spring 2007 (A.C.O., IMSA, FIA GT)
Suitable for competition in international GT events
Not approved for road use
Bodywork
Coup??, monocoque structure
Basis 911 GT3 RS
Lightweight, all-steel bodyshell hot-galvanised on both sides
Front apron, rear bumper and sideskirts made of carbon-fibre, aerodynamically optimised
Rear-lid, panelling and doors made of carbon-fibre
Extended wheel arches made of carbon-fibre
Side and rear windows made of plastic
Adjustable rear wing made of carbon-fibre
Flat underbody complying with A.C.O. and FIA regulations
Welded-in safety cage (30 metres of seamless steel tubing)
Racing bucket seat with fire retardant upholstery
Six-point seat harness, HANS compatible
Electric fire extinguishing system
Air-jack system
Aerodynamics
Adjustable through rear wing and ride height
Engine
Six-cylinder, water-cooled boxer engine, aluminium engine block and cylinder heads, four valves per cylinder, oil cooler with water-oil heat-exchanger, variable valve timing (VarioCam), hydraulic valve-play compensation, intake system with two restrictors each 30.3 mm for A.C.O. 1,225 kg-version, single-throttle butterfly valve, dry-sump lubrication with separate oil tank, oil and cooling water refilling system, exhaust gas treatment: two Metalits with PE Design???, stereo lambda sensor-control, electronic engine management system MS 4.0, six coil electronic ignition, sequential multi-point injection
Bore 102.7 mm ??
Stroke 76.4 mm
Displacement 3,795 cc
Compression ca. 14.5:1
Max. power 357 kW (485 hp) at 8,500 rpm
Max. torque 435 Nm at 7,250 rpm
Power output 99.2 kW per litre
Max. revs 9,000 rpm
Fuel type RON 98 to RON 102
Exhaust system in the basis version following A.C.O.-spec: Tubular headers with muffler system (113 dB pass-by)
Alternative exhaust systems available:
1. Tubular headers following FIA regulations (110 dB standing noise)
2. Tubular headers with open exhaust
3. Tubular headers with exhaust incl. catalytic converters homologated for DMSB and Spa 24 Hours Belcar category
Electrical System
12 Volt
Motec display with data recording
Battery capacity 45 A-h
Alternator 140 A-h
Optional:
Bosch Memory Card
Traction control
Power Train
Transmission via dual constant velocity joint driveshafts on the rear axle
Manual sequential six-speed dog type transmission, “inline” shift mechanism
Sensor controlled ignition interruption
Oil-water heat-exchanger
Single-mass flywheel with triple-disc fibre race clutch
Clutch diameter 4.5 inches (114.3 mm)
Limited slip differential 40/60 percent (or alternative)
Suspension
Front axle: Strut type suspension (optimised by Porsche) with unibal joints and corresponding modifications of kinematics, independent wheel suspension on transverse control arms, longitudinal arms and spring struts, double coil springs (master and auxiliary) adjustable in different positions, ZF-Sachs gas pressure dampers (Through Rod System), separated track control arms, adjustable front blade-type roll bar, wheel mounts with double damper clamps, electrically-powered power steering
Rear axle: Multilink rear suspension with unibal joints and corresponding modifications of kinematics, independent wheel suspension (five arms), rigid suspended subframe, double coil springs (master and auxiliary) adjustable in different positions, ZF-Sachs gas pressure dampers (Through Rod System), separated track control arms, rear axle tie rod strengthened and continuously adjustable, adjustable blade-type roll bar
Adjustable geometry suspension (height, camber, track)
Brakes
Two-circuit brake system with front/rear circuit separation and brake-power distribution by bias bar system, no ABS, six aluminium monoblock callipers at the front, four-piston aluminium monoblock callipers at the rear, cross-drilled, internally vented brake discs measuring 380 x 35 mm diameter/width at the front and 355 x 32 mm diameter/width at the rear
Rims/Wheels
Front axle: 11J with Michelin slicks 27/65-18
Rear axle: 13 J with Michelin slicks 31/71-18
Weight
1,225 kg following A.C.O and FIA GT regulations
Power-to-weight ratio: 3.3 kg/kW (2.5 kg/hp)
Measurements
Length 4,439 mm +/- 5 mm
Width 1,957 mm +/- 5 mm
Height maximum 1,250 mm
Wheel base 2,373 mm
Track width
Front 1,565 mm (3.5 degree camber)
Rear 1,620 mm (3.0 degree camber)
Tank capacity 100-litre safety fuel cell with quick refuelling system
Quantity for 2007 35
