BMW Z4 GT3 Update

April 9, 2011 at 10:25 am

The 2011 version of the BMW Z4 GT3 has been revised and upgraded in hope to have a better racing career this season. The goal of the latest modifications was primarily to improve aerodynamic efficiency by tweaking its massive aero kit.

BMW Motorsport engineers have also fine-tuned the aerodynamics of the BMW Z4 GT3 for the new season, improving the car’s performance in this area. The GT3 car is powered by a race spec 4.4-litre eight-cylinder engine instead of the road car’s straight-six and features a six-speed, sequential gearbox. Gearshifts are now initiated using two paddles. When it comes to electronics, the private teams can look forward to innovative BMW solutions with two different ECUs.

BMW Z4 GT3 Update z4 gt3

The modern ECU408 takes over the engine management, while the Power400 electronic control unit is responsible for controlling all the actuators. The power is transmitted through a six-speed, sequential gearbox. Gearshifts are now initiated using two paddles.

The BMW Z4 GT3, which was launched in March 2010, achieved its greatest success to date in January 2011. Claudia Hürtgen (DE), BMW works driver Augusto Farfus (BR), Tommy Milner (US) and Edward Sandström (SE) won the Dubai 24 Hours for Team Schubert. This was the first outright victory for the BMW Z4 GT3 at a marathon race of this scale, having already proven its potential with wins in its debut season in the FIA GT3 European Championship.

BMW Z4 GT3 – Technical specifications.

Width:2,010mm

Height:1,210mm

Wheel base: 2,510mm

Tank capacity: 100 litres

Price:315,000 Euros (excl. VAT)

Chassis/body:Unitary construction steel body with welded safety cell made of extremely rigid, precision steel tubing, safety fuel tank in CFRP sandwich tray, pneumatic four-stamp jack system

Aerodynamics:Front wings, rear apron, bonnet, roof, boot lid, rocker panel, doors, front wings and flared rear wheel arches made of carbon fibre, rear wing made of aluminium compound

Transmission:Sinter clutch operated by hydraulic central slave cylinder; six-speed sequential racing transmission with straight-cut, unsynchronized gears; additional oil/air cooler; quick shift system with ignition cut-out controlled by shifting force; mechanical differential lock and additional oil/air cooler

Front axle: Double-joint thrust bar axle, with increased wheel caster angle, enlarged track width and enhanced wheel camber compared to production version; five-way adjustable shock absorbers; tubular stabiliser bar

Rear axle: Longitudinal link axle with two transverse control arms, with enlarged track width and enhanced wheel camber compared to production version; five-way adjustable shock absorbers, tubular stabiliser bar

Front brake system: Six-piston aluminium brake callipers, inner-vented grey-cast iron brake disks 378 mm in diameter

Rear brake system: Four-piston aluminium brake callipers, grey-cast iron brake disk, 332 mm in diameter

Steering:Rack and pinion steering with electro-hydraulic power

Wheels:Aluminium rims, front axle: 12×18 inches, rear axle: 13×18 inches

Cockpit:Free programmable LCD Display with integrated shift indicators

Steering wheel: Quick release multi-function steering wheel with integrated display unit; integrated shifting paddle

Energy management: Electric energy management and monitoring with BMW Motorsport POWER400 control unit, networking through two bus systems

Engine type: Eight-cylinder, V-configuration

Capacity:4,361cc

Bore x stroke: 92x82mm

Max. engine speed: 8,500rpm

Cylinder block: Aluminium cylinder block construction with bed plate lower section

Crankshaft:Steel crankshaft

Pistons:Forged skirt pistons

Conrods:High-performance steel

Cylinder head: Aluminium DOHC (Double Over Head Camshaft); four valves per cylinder

Valve train: Four overhead chain-driven camshafts, valve actuation via rocker arms

Intake system: Eight throttle valves

Exhaust system: High-performance header, silencer

Fuel system: Single cylinder multi-point injection

Lubrication: Dry sump lubrication

Cooling: Water/air cooler and oil/water heat exchanger

Engine management: BMW Motorsport ECU408 with two high-performance micro-processors; individual cylinder injection; pit speed limiter; quick Shift function; EML; integrated traction control; VANOS control; engine data memory system

Wiring harness: Weight-optimised

Ignition coil: Eight high-performance pencil coils with integrated ignition drivers

Spark plugs: High-performance spark plugs

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