Turbo Tweaks Boost BMW M3 CS Power Output

BMW has launched the latest iteration of its special-edition performance M3 CS model claiming 542bhp from its six-cylinder in-line gasoline engine.

With lightweight construction, the new BMW M3 CS features carbon fiber-reinforced plastic (CFRP) components, increased engine power and a bespoke chassis setup. The car will be built in a limited run at BMW Group Plant Munich, with a market launch commencing from March 2023. Prices in the UK will start from £115,900 ($143,077). Along with the UK, the US, Germany, and Japan are the most important markets for this new special model.

The car’s engine is teamed with an eight-speed M Steptronic transmission and the M xDrive intelligent all-wheel-drive system. These combine to produce a claimed 0-to-62 mph time of 3.4 seconds and on to an electronically limited 188 mph top speed. Claimed fuel economy is up to 28mpg (23.31mpg US) combined consumption on the WLTP rating and as little as 229g/km of CO2 emissions.

It uses a modified version of the high-revving 3.0-liter six-cylinder in-line engine, with M TwinPower Turbo technology, developed for the BMW M3 and BMW M4. The modifications result in a power boost of upgrade of 39bhp in peak output compared with the BMW M3 Competition Saloon.

The power increase is achieved through targeted revisions to the engine’s turbo charging technology. The adjustments primarily involve raising the maximum charge pressure of the two mono-scroll turbochargers from 1.7 to 2.1 bar and making some model-specific tweaks to the engine management. A specially designed engine mount, with increased spring rates, was also designed to create an extremely rigid connection between the power unit and the vehicle’s structure. This results in an even sharper engine response and direct transmission of its power to the drivetrain. Peak torque of 479ft-lbs is produced between 2,750 and 5,950rpm and maximum output arrives at 6,250rpm. The engine revs to a maximum 7,200rpm.

Enhancing the soundtrack is the dual-branch exhaust system, featuring electrically controlled flaps and a titanium rear silencer with weight-minimizing design. In customary M fashion, it features two pairs of matt black tailpipes which help produce the emotionally rich soundtrack.

— Paul Myles is a seasoned automotive journalist based in Europe. Follow him on Twitter @Paulmyles_

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