2015 BMW M4 Coupe MotoGP Safety Car - Main

BMW will be using a specially-prepped BMW M4 Coupe as the safety car for the upcoming 2015 MotoGP season, just like it did last year. Light bar, livery and upgraded aerokit aside, the performance coupe comes with a new water injection technology, which will be included in future production models.

While the M4’s 3.0-litre inline-six engine delivers a hefty 425 hp and 550 Nm of torque, the twin-turbo unit is still exposed to extreme heat, which could lead to knocking hence loss of power. To overcome this, BMW has fitted a water injection system that injects a fine spray of water into the collector to reduce the temperature of the air that’s coming into the combustion chamber.

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As a result, the cooled air doesn’t only reduce the engine’s tendency to knock, it also lowers thermal strain on internal parts such as pistons, exhaust valves, catalytic converters as well as turbochargers, preventing costly damage.  Not only that, the performance and torque are also said to improve by up to eight percent thanks to the higher level of oxygen in the cool air.

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Of course, the whole water injection technology also includes a five-litre water tank as well as water pump, sensors and valves – all stored in the boot. According to BMW, the pump feeds the water to the injectors at a pressure of ten bar, while the volume supplied depends on load, engine speed and temperature for an effective water consumption.




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