51st Grand Prix Macau - Guia Race - Technical specifications BMW 320i ETCC 2004

Technical specifications BMW 320i ETCC 2004.
Vehicle.
Length: 4,490 mm
Width: 1,809 mm
Height: approx. 1,415 mm
Wheelbase: 2,742 mm
Vehicle weight: 1,140 kg (with driver)
Tank capacity: approx. 45 litres

Chassis/body: unitary construction steel body with welded safety cell made of
highly rigid precision steel tubing;
safety fuel tank made of CFRP sandwich;
pneumatic three-stamp rapid jack system
Aerodynamic
package: front apron, rear apron, rear wings, front wings and flared rear
wheel arches made of CRFP/GFRP
Transmission: single-disc carbon-fibre clutch operated by a
hydraulic central
slave cylinder;
five-speed racing transmission with straight interlinked unsynchronised wheel
sets based on the production gearbox and additional oil/air cooler;
quick-shift system with ignition suppression controlled by shifting force;
production rear axle differential with mechanical limited-slip differential
and additional oil/air cooler
Front axle: single-pivot strut suspension with increased wheel caster angle,
enlarged track width and enhanced wheel camber compared to the production
version;
four-position adjustable shock absorbers;
tubular stabiliser bar
Rear axle: central link-arm axle with double wishbone, with enlarged track
width and enhanced wheel camber compared to the production version;
four-position adjustable shock absorbers;
stabiliser

Brake system, front: four-piston brake callipers made of aluminium;
inner-vented grey cast iron brake discs of 295 mm diameter
Brake system, rear: two-piston brake callipers of aluminium;
grey cast iron brake discs of 280 mm diameter
Steering: rack-and-pinion steering with electric-hydraulic power assistance
Wheels: aluminium rims, 9 x 17 inches
Tyres: Michelin race tyres, 24/61-17 (front and rear)

BMW P54 engine.
Type: six-cylinder in-line
Capacity: 1,990 cc
Bore x stroke: 80 x 66 mm
Compression: 11 : 1
max. output: approx. 270 bhp at approx. 8,800 rpm
max. torque: approx. 230 Nm at approx. 7,000 rpm
max. engine speed: 9,000 rpm (as per regulations)

Cylinder block: single-cylinder block construction made of aluminium with
inserted grey cast iron liners
Crankshaft: steel crankshaft with reduced bearing diameters
Pistons: forged skirt pistons
Conrod: high-performance steel
Cylinder head: aluminium construction with parallel drive valve arrangement;
four valves per cylinder
Valve drive: two overhead chain-driven camshafts;
mechanical bucket tappets
Intake system: single-throttle valve (64 mm, as per regulations); air box made
of CFRP/GFRP with load change-optimised ram tubes
Exhaust system: high-performance header, silencer and catalytic converter
Fuel system: single-cylinder multipoint injection with one injection valve per
cylinder; injection pressure 5.0 bar
Lubrication: wet sump lubrication with optimised oil sump/oil suction system
Cooling: water/air cooler and oil/water heat exchanger
Flywheel: steel, weight-optimised to 4 kg
Fuel: standard fuel, Super Plus unleaded

Electrical system/electronics.
Engine control: BMW Motorsport ECU 12A-R6 engine control unit with three
high-performance microprocessors;
individual cylinder injection and ignition;
pit speed limiter function, quick shift function;
engine data memory system
Coil: high-performance pencil coils with integrated ignition drivers
Spark plugs: Champion high-performance spark plugs
Cockpit: programmable LCD display with integrated indicators
Steering wheel: quick-release multifunction steering wheel with integrated
display control

Press contact: Heike Bartsch, BMW Corporate Communications Motorsport,
Mobile: +49 (0)172 84 85 998, tel. office: +49-(0)89-382 33115,
heike.bartsch@bmw.de

BMW press releases and photos for media use are available at www.press.bmw.com.