WTCC Macau, The Final Round
The good people at Chevrolet flew the Oneshift all the way up north to Macau for an exclusive opportunity to mingle with the Chevrolet team, and watch the race in comfort. We bring you some of the action and girls from ground zero
Chevrolet’s team weapon, the Lacetti, isn’t very different from the Optra available for sale in our local market. This modified Optra comes under the Group N rule book in the FIA. To qualify, a minimum of 2500 cars of the said competing model variant must be built within a year, out of a 25,000 total for that model range.
The cars are then modified to the prevailing Super 2000 rules, which basically limit modifications to 280hp, and a maximum engine displacement of 2 litres (no forced induction allowed). The transmission must be of a 6-speed sequential type, with control specifications from either Sadev, Xtrac or Ricardo and no electronics are allowed in the differentials.
The suspension type usually is of the McPherson setup for both front and rear. There are to be no electronic driver aids, and the car must be of a 1.8 metre maximum width. The maximum selling price of the car must not exceed 168,000 Euros.
Wheel base: 2,620 mm
Length: 4,500 mm
Width: 1,809 mm
Height: 1,360 mm
Front track: 1,560 mm
Rear track: 1,560 mm
Curb weight: 1,140 kg
Fuel capacity: 50 litres
Frame: Steel unitary structure with FEA optimised rollcage
Body: Steel/composite with Motorsport aerodynamic front splitter and adjustable rear wing Fender and rear quarter panels widened to 1809mm
Front suspension: MacPherson Strut, coil springs, gas-filled dampers and anti-roll bar
Rear suspension: Dual link, coil springs, gas-filled dampers and anti-roll bar
Wheels and tyres: 9” x 17” aluminium racing rims, Advan Competition tyres
Front brakes: 4-piston aluminium calliper, 332 x 32mm ventilated steel disc, air cooled
Rear brakes: 2-piston aluminium calliper, 280 x 7 steel disc
Cylinders: 4
Mounting: Transverse
Engine management: Motec
Displacement: 1,998 cc (88 mm bore X 82 mm stroke)
Intake system: 64mm throttle, individual injection, plenum with internal trumpets
Valve train: 2 overhead camshafts; 16-valve, direct-mech tappet, 35 mm inlet & exhaust valve diameter, coil spring
Compression ratio: 12:1
Power: 280 hp @ 8,500 rpm
Torque: 267 Nm @ 5,800 rpm
Top Speed: approx. 254 km/h depending on gearing & final ratio
Transmission: Hewland 6-speed sequential shift Mechanical linkage
Clutches: Single disc/Mechanical limited slip differential
Credits: Text and Photos by Amery Reuben
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