2003 BMW M3 CSL
(source: BMW) From lightweight concept to pure reality – the new BMW M3 CSL
Of the limited-run models of the M3, the M3 CSL (E46) is the most celebrated. BMW made a limited run (less than 1,400 units) of these machines between June and December of 2003. The CSL (Coupe Sport, Lightweight) received an aggressive weight reduction campaign, more power (up to 360 hp), and sharper handling characteristics than the standard M3. Weight loss was achieved via a carbon-fiber roof, a trunk floor that was practically made of cardboard, no air conditioning, and no radio. Upgraded racing seats were fitted, and the aforementioned sequential manual gearbox was made standard.
A new sports car now embodies the very core of the BMW brand in its most original style – the M3 CSL. Taking up the heritage and legendary success of BMW’s famous lightweight coupes which gained fame in touring car racing back in the ’70s, the engineers of BMW M have once again created a purist, thoroughbred sports car consistently designed and built to the highest standard of excellence.
The formula BMW M’s specialists have followed in creating this dynamic driving machine is “intelligent” lightweight technology: This means consistent reduction of weight by using the most appropriate materials at the right point. Carbon-fiber -reinforced plastic, one of the most important materials in Formula 1, for example, not only reduces the overall weight of the car (weighing approximately 243 lbs less than the standard M3, the M3 CSL has an overall weight of just 3,054 lbs), but also allows even higher speeds in bends particularly through the use of this lightweight material at the extreme ends of the car.
Focusing on their quest to reduce weight, the engineers at BMW M took a close look at virtually every component of the M3, in each case using the most suitable materials in order to save weight. As a result, the M3 CSL even comes with glass-fiber plastics otherwise used for aerospace applications such as endless-glass-fibre thermoplastics serving as the structural material for the through-loading system and on the rear bumper supports.
The Powerful Engine of the M3 CSL
The significant increase in power and performance is however not only the result of intelligent lightweight engineering. Rather, the straight-six power unit already renowned for its high engine speeds has been enhanced to an even higher standard, BMW M’s engineers boosting maximum output to 360 bhp at 7,900 rpm from 3.2 liters capacity, that is a sensational output- per-liter figure of 111 bhp. Maximum torque, in turn, is 273 lb-ft at 4,900 rpm.
M3 CSL’s Special Gearbox
It almost goes without saying that the M3 CSL comes with BMW M’s most sporting and dynamic transmission, the Sequential M Gearbox with Drivelogic. Also based on Formula 1 technology, the SMG/Drivelogic transmission ensures an ultra-fast gearshift in just 0.08 seconds on all six gears, providing a direct and consistent flow of power at all engine speeds.
With the driver being able furthermore to choose between the sequential and an automated gearshift mode and benefiting from Drivelogic, he has no less than eleven different gearshift options at his disposal. And last but not least, SMG Drivelogic has been re -designed and re -adjusted completely for the M3 CSL.
Precise and Nimble
Wider front track and modified suspension geometry give the M3 CSL a standard of dynamic driving performance otherwise only a thoroughbred racing car is able to offer. These modifications include specially made springs and dampers as well as the car’s newly aligned steering for supreme, cutting-edge handling. The brakes have also been modified for even more stopping power and faster deceleration, allowing the M3 CSL to reach a standstill from 60 mph in less than 34 meters. And for special purposes on the race track, the car is also available with sports brake linings.
The Cockpit of the M3 CSL
Inside, the M3 CSL aga in follows the concept of supreme function and minimum weight wherever it makes sense. Reflecting the purist standard of motorsport, the car does without electric seat heating or a navigation system, and both the radio and air conditioning are only available as an option. A special feature on the clear-cut dashboard is the CFP covers on top, the centre console, door and side linings also being made of the same material.
The glass-fiber -plastic bucket seats finished in a combination of Amaretta and fabric not only give the driver and front passenger optimum side support, but also tilt forwards conveniently to provide easy access to the two individually contoured seats at the rear. For reasons of weight, seat adjustment for length and height is manual.
Official Website – www.bmw.com
