14.9 City L/100km 10.4 Hwy L/100km
An emphasis was put on reducing weight – The M3 CSL features numerous lightweight components, as well as a list of drivetrain, chassis and cosmetic enhancements over the standard M3.
Structural weight reduction measures include the use of glass-reinforced plastics in various structural points in the car, a roof constructed from carbon fiber reinforced plastic (CFRP) , reducing curb weight by 7 kg (15 lb) and more importantly, lowering the centre of gravity. Body panels were constructed from carbon fiber reinforced polymer and thinner glass for the rear window. The front bumper support is also constructed by CFRP with a uniquely shaped front airdam and a single air intake on the left hand side. The lower rear valance is also made of CFRP while the reshaped trunk lid is made of sheet molding compound. The CSL discarded a large proportion of the M3s sound insulation, the electric seats and navigation system. The interior includes fibreglass front racing bucket seats, a fibreglass backing for the rear seats, and carbon fiber for the center console & door panels. The steering wheel has just a single button which activates the M track mode. The CSL retained the 50:50 weight distribution of the standard M3.
BMW claimed that the CSL has a curb weight of 1,385 kg (3,053 lb), 110 kg (243 lb) lighter than the standard M3.
The wheels were increased to 19 inches in diameter. The brakes were upgraded with larger floating rotors at the front and larger pistons at the rear. The suspension system was revised with stiffer springs, upgraded shock absorbers and a quicker ratio for the steering rack (14.5:1 vs 15.4:1 on regular M3).The electronic stability control was retuned and an “M track mode” was added, allowing higher thresholds before the system intervened.
The 3,246cc S54 inline 6 cylinders engine used in the CSL had increased output over the regular M3 by 13 kW (17 hp) and 5 N⋅m (4 lbf⋅ft). This is due to the use of sharper profile camshafts, a bigger air intake with carbon fiber manifold, a refinement of the exhaust manifold, and slightly different exhaust valves plus a high performance lightweight exhaust system. The only transmission available was the 6-speed SMG II automated transmission.
Only 841 Left hand drive model were ever produced.
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