WestCoast Racing

The Cars

BMW 320 Si E90 S2000 STCC/WTCC

Dimensions
length: 4535 mm
width: 1845 mm
wheelbase 2763 mm
minimum weight: 1170 kg including the driver.

Engine
4-cylinder in line, longitudinally installed
distribution: two overhead camshafts, 16 valves
displacement: 1999 cc
bore x stroke: 86 x 86 mm
compression ratio: 11:1
maximum output: 275 bhp @ 8300 rpm
maximum torque: 242 nm @ 7250 rpm
engine management: BMW Motorsport ECU 404
lubrication: wet sump.

Transmission
Rear-wheel-drive
gearbox: 5-speed H-box
clutch: carbon-fibre single-plate
differential: mechanical limited slip differential.

Brakes
Dual circuit system with adjustable brake balance
front brakes: 4-piston calipers, 332 mm steel ventilated discs
rear brakes: 2-piston calipers, 291 mm steel discs.

Chassis
Front suspension: double-joint strut, coil springs, gas-filled dampers, anti-roll bar
rear suspension: five-arm multi link axle, coil springs, gas-filled dampers, anti-roll bar
steering: power assisted rack and pinion.

BMW Z4 GT3 2011

Chassis:
Modified steel bodyshell with integrated safety rollcage.
Complete bodywork made of carbonfibre composites.
Heated Macrolon windscreen, macrolon side and rear windows.

Aerodynamics:
Front: splitter and front winglets
Rear: Double element rear wing and diffusor

Dimensions:
Width: 2012 mm
Length: 4387 mm
Height: approx. 1210 mm
Wheel base: 2509 mm
Ground clearance: 40-70mm
Minimum weight: 1210 kg (excl. driver and fuel)
Tank capacity: 105 litres

Engine:
Engine type: V8, naturally aspirated
Construction: aluminium block and head
Capacity: 4361 cc
Bore x stroke: 92 x 82 mm
Oil system: Drysump lubrication
Maximum engine speed: 8.500 rpm
Max. power output: over 520hp
Max. Torque: approx. 500 Nm at approx. 5,500 rpm

Transmission:
Sachs 3-disc sinter clutch
Xtrac 6-speed sequential gearbox operated with electro-pneumatic paddle-shift system.
BMW limited slip differential.

Brakes:
Adjustable brake balance and racing ABS-system
Front: 378x32mm ventilated steeldiscs, 6-piston caliper
Rear: 355x28mm ventilated steeldiscs, 4-piston caliper

Suspension:
Front: Double wishbone MacPherson suspension
Rear: Longitudinal link axle
Dampers: Öhlins 4-way adjustable
Springs: Eibach
Anti-roll bars: Tubular with adjustable blades

Wheels:
Front: Centre-lock BBS rims 12×18″ with Michelin 30/68-18″
Rear: Centre-lock BBS rims 13×18″ with Michelin 31/71-18″

Electronics:
Adjustable traction-control (ASC)
Adjustable stability-control (DSC)
Racing ABS-system
2D data-logging system with multifunctional display and integrated shiftlights