CSL. The last time BMW applied these three-character production cars was the E46 M3 CSL, which debuted in 2003. It’s been 19 years since then, and in 2022, BMW is celebrating the 50th anniversary of its famous M division. Welcome to the new G82 BMW M4 CSL.
Coming to production at the BMW Group Plant Dinglefing from July 2022, the M4 CSL is the fastest series production BMW lapping Nürburgring Nordschleife (proof below), setting a time of 7 minutes 15.677 seconds in the track version that is traditionally used for comparison. Purpose, whose length is 20.6 km. On the long 20.832-km circuit, the time was recorded as 7 minutes 20.207 seconds.
The key to M4 CSL’s impressive lap time is its enhanced firepower. While the 3.0-liter twin-turbo Straight Six produces 510 PS (503 hp) and 650 Nm of torque in regular M4 competition, the M4 CSL packs an additional 40 PS (40 hp) with 550 PS (543 hp) and the same peak torque output.
The benefits of increasing the charge pressure of two mono-scroll turbochargers range from 1.7 to 2.1 bar, including the use of a low-temperature circuit and an indirect intercooler supplied by a specially designed compressor.
Through a dual-branch exhaust system featuring a titanium rear silencer and two electrically controlled flaps the engine sends its emissions outward, the latter making the exhaust note more clearly heard when controlled driving is not a priority.
To get power down on the road, the rear wheels have an eight-speed M steptronic transmission with drivelogic to drive the channel exclusively. In terms of performance, the M4 CSL takes just 3.7 seconds to accelerate from 0-100km / h, and sprints at 200km / h from permanent start in 10.7 seconds – 0.2 seconds and 1.8 seconds faster than the M4 competition. Respectively the maximum speed is 307 km / h electronically limited – 17 km / h higher than the M4 competition with the M drivers package.
In addition to the added grant, the M4 CSL also thanks to the 100 kg lighter weight-saving system compared to the 1,625 kg M4 competition. These include the Fitting M carbon full bucket seat which shaves 24 kg, the rear seats are discarded and the amount of soundproofing cuts a further 21 kg and 15 kg respectively. Many interior components, including the center console, are made entirely of CFRP (carbon-fiber-reinforced polymer).
Externally, the weight is reduced by about 21 kg using M Carbon ceramic brakes (400 mm front disc, 380 mm rear disc), light alloy wheels, springs and struts. The M4 Competition has already brought a roof made from CFRP, and in the M4 CSL, the material is used to cut an additional 11 kg for bonnet, splitter and boot cover.
You will also notice the skeleton-like grille, which is specific to the special-edition model and weighs 0.5 kg. Remember that titanium rear silencer from before? Well, it’s 4.3 kg lighter than a conventional steel equivalent silencer.
After improving the engine and incorporating the M4 CSL into the diet, BMW engineers focused on improving the chassis. First, a more robust engine with a 1,000 N / mm spring rate is mounted, which is higher than the M4 Competition with 580 N / mm on the left and 900 N / mm on the right.
Similarly, the transmission mount has a noise hardness standard of 55 instead of 49, while at the bottom of the bonnet, newly-improved front-end strut braces made of cast aluminum help increase body stiffness for better agility and steering accuracy.
The front double-joint spring strut axle and rear five-link axle have an adaptive M suspension with electronically controlled damper, electromechanical M servotronic steering with variable ratio and an M-specific version of the integrated braking system.
Adjustable axle kinematics with increased strength and low weight have been restored, while wheel camber settings, dampers, new auxiliary springs and anti-roll bars have also been optimized. BMW also states that the M4 CSL is eight mm shorter than the M4 competition to lower its center of gravity. It adds that the front axle’s fake swivel bearings have more camber and the rear axle gets four extra ball joints instead of a rubber mount.
Drivers can adjust the drive-related system features by pressing the M setup button, which allows them to select different drive modes (road, sport and track) or assign personalized settings to the two M buttons on the steering wheel. There is also an M traction control system related to the vehicle’s dynamic stability control, with one to 10 steps allowing control over the threshold for wheel slip limitation – allowing a maximum slip.
Once all the mechanical upgrades were done, the BWM designers went to work to make sure the M4 CSL looked exactly the same. The obvious gifts when viewing the car from the front include a large splitter, new grille and carbon bonnet, but a good help with the red accent and classic BMW motorsport badge, followed by the blue, purple and red parts surrounding the BMW Roundle.
Specified with the optional BMW laserlight headlamp, as seen here, you’ll get the signature of a running light during a yellow day instead of white like the F90 M5 CS. On the back, the taillight covers have light threads woven, which are illuminated using laser technology to make the L-shaped contour more distinct.
The M4 CSL comes with 19-inch front (with 275/35 profile tires) and rear 20-inch (with 285/30 profile tires) wheels as standard and is offered in just three colors: Frozen Brooklyn Gray, Alpine White and Sapphire. Black. As an alternative, “BMW M 50 Jahre” symbols can be added.
For the interior, we’ve already mentioned full bucket seats and carbon trim, but there are other changes. The M Alcantara steering wheel, for example, features a red center marking at 12 o’clock and has carbon inlays, lots of red accents, stitching and CSL badges, as well as two reusable helmets to accommodate the space behind the vacated rear seats.
In terms of equipment, the M4 CSL comes standard with the BMW Live Cockpit Professional system that includes a 12.3-inch digital instrument cluster and a 10.25-inch infotainment touchscreen. There is also a head-up display and M Drive Professional, which includes M Drift Analyzer and M Laptimer.
Given its Nürburgring achievements and capabilities, the M4 CSL will probably be much sought after, though you’ll want to hurry because production is strictly limited to just 1,000 units. BMW says the most important sales markets for its special-edition models will be the United States, Germany and the United Kingdom, so it is going to be a shock to get allocations to other markets.