The tech lets the limited-run BMW run an even more aggressive engine tune.

A new BMW ad from China uses the beautiful words of Bruce Lee as the perfect way to showcase the power of the M4 GTS’ water injection system. The spot takes excerpts from a classic interview with the martial arts icon where he explains the power of water to both flow and crash.

BMW M4 GTS Uses Water-Injection System to Make Track-Day Power

The Bosch-derived water injection system in the M4 GTS sprays a fine mist of water into the intake manifold. The liquid vaporizes, which cools the chamber and allows the turbo to run at higher boost. The tech allows the 3.0-litre biturbo inline-six engine to produce 494 horsepower and 442 pound-feet of torque. When the 5.0-litre tank runs out, the powerplant's computer dials back the power output, until the owner refills it. BMW estimates the water should last around 2,896 kilometres between refills.

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BMW sold just 803 units of the M4 GTS to customers, plus 27 more of them for promotional purposes. In addition to the power upgrade, engineers shaved off 62 kilograms from the standard model, which brings weight down to 1,510 kg. The coupe gets to 100 kilometres per hour from a standstill in 3.8 seconds and to a top speed of 305 km/h.

The ad communicates the system’s benefits by showing an M4 GTS sliding in slow motion through shallow water. By kicking up huge rooster tails, the spot gives power to Lee’s words.  

BMW and Bosch intend to roll out the water-injection system to less exclusive models eventually. The company intends to use the tech for improving fuel economy and lowering CO2 emissions.

Video Source: Christopher Catchpole via YouTube, BMW Blog

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