HomeTechnologyM4 LSC. This is the fastest BMW (limited...

M4 LSC. This is the fastest BMW (limited to 1000 units)

CSL abbreviates competition, sport Y Lightthree ingredients with which BMW seasoned the M4, proposing a lighter and more powerful version, capable of delighting those who enjoy thrills behind the wheel or track days. But with a certain exclusivity, because the main limitation of this special edition is that it foresees only a thousand units, whose production will begin next July.

Perfect to commemorate 50 years of BMW M, the sports department of the Bavarian manufacturer, the new M4 CSL debuts the acronym in this range as a coupé, since the most aggressive special version that has existed so far was the GTS, in 2016. However, six years ago, it was left at 500 hp and a power/weight ratio of 3.17 kg/hp. Much better than the 360 ​​hp and 3.84 kg/hp of the 2004 M3 CSL, but far from the figures intended by the new M4 CSL, a “machine” with room for only two that was given a diet and a vitamin contribution of mechanics to deliver 40 CV more than the M4 Competition, losing more than 100 kg with respect to it. In other words, with 550 hp and 1,625 kg, the German sports car can boast a power-to-weight ratio of 2.95 kg/hp. The M4 CSL is also the fastest production BMW to complete a lap at the legendary Nürburgring Nordschleife in Germany, where it completed a lap in 7:20.2.

To lighten the weight, BMW stripped it of the rear seats (21 kg less) and replaced the front ones with bucket seats with a carbon fiber reinforced plastic structure (24 kg less), a solution that was extended to many other components, in interiors. and outdoors Then he changed the soundproofing to a lighter material, saving another 15 kg. The diet also included other items, from carbon-ceramic brakes to light alloy wheels, including springs, suspension brackets, grills, lights, floor mats, among many others. But no matter how many carbon-fiber-reinforced plastic (CFRP) components BMW has used, including the roof, bonnet, boot lid and center console, as in a conventional M4, there seem to be creature comforts worth the money. they weigh. At least, that is what they make us believe in view of the fact that this CSL does not dispense with the comfort associated with the dual-zone climate control (optional, automatic air conditioning is standard) or the wireless charger for the mobile phone, elements that are not very useful, usual in proposals aimed at the track and, by table, “stripped” of certain privileges to be more effective. The focus on the essentials is also on the driving aids, as the Driving Assistant and Parking Assistant systems are available as an extra, with parking assistance sensors, forward collision alert, lane departure warning and reading and display of the speed limit.

In any case, after having managed to lose more than a hundred kilograms compared to the M4 Competition, the manufacturer concentrated on extracting more power from the 3.0-liter twin-turbo inline six-cylinder, with a displacement of 2,993 cm3 and double supercharging. The “trick” was essentially to increase the maximum charge pressure on the two turbos, jumping from 1.7 to 2.1 bar. That and engine mapping tweaks allowed it to gain that 40 hp, at the same revs as the M4 Competition, at 6250 rpm. The available “force” also changes, not in absolute terms, because the maximum torque remains at 650 Nm, but because it is available in a wider rev range. Both the M4 Competition and this CSL version offer 650 Nm from 2,750 rpm, but the latter “stretches” the power to 5,950 rpm (compared to 5,500 rpm in the Competition). All this vitality is transferred to the rear wheels through an eight-speed M Steptronic automatic gearbox with torque converter, although the driver can also take advantage of the 550 hp of the M4 CSL using the carbon fiber paddles behind the wheel and the two steering wheel buttons. steering wheel to memorize the settings of the systems that influence the vehicle dynamics.

Capable of accelerating from 0 to 100 km/h in 3.7 seconds, the new German coupé only needs 10.7 seconds to reach 200 km/h, and can then continue “on the go” to 307 km/h. , the maximum speed to which it is electronically limited.

When it comes time to literally take the reins, the driver of the new M4 CSL can rely on 15.7-inch fixed-caliper six-piston brake discs at the front, while the rear wheels have a floating caliper and a single piston. . As for the tires, Michelin Pilot Sport Cup 2 R 27535 ZR19 (front) and 285/30 ZR20 (rear) were naturally needed, mounted on 19-inch and 20-inch wheels, respectively.

In technical terms, BMW has also tried to lower the adaptive suspension by 8 cm compared to the Competition version, also fine-tuning the regulation (the shock absorbers are electronically controlled). According to the brand, the rigidity of the chassis has been increased and, as it is a model designed to maximize driving pleasure on the track, there is no lack of “details” to better serve the driver, from the six-point seat belt. anchors to the passenger compartment to store helmets (instead of the rear seats), without forgetting the possibility of removing the head restraints of the front seats, to drive with a helmet. Equally important, given the vocation of this CSL, is the M Mode button, which activates the Road, Sport and Track settings. The standard equipment includes the M Drive Professional system, with M Drift Analyzer and M Laptimer, functions accessible from the central 10.25-inch screen. Directly in front of the driver, another 12.3-inch screen displays the instrumentation.

Source: Observadora

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