BMW M4 GTS Uses a Very Rare Water Injection System to Make +50 Horsepower
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Yes, we know we featured Jason Fenske from Engineering Explained just yesterday but we cannot resist his incredible videos that bring together the best of mechanics and engineering. In this clip, he explores the BMW M4 GTS.
The car is one of the extremely rare production cars to be fitted with a water injection system. According to Fenske, the system is used to take the twin-turbo I6 engine from 444 Horsepower up to 493 horsepower.
The video features a description of how the complex yet very effective system works that comes directly from BMW. We added the explanation below, but we urge you to watch the video instead for Fenske's clear and direct illustration.
"Water is injected as a fine spray into the intake manifold plenum chamber where it evaporates, significantly lowering the temperature of the intake air. This reduces the final compression temperature in the combustion chamber, which also reduces the risk of knock, allowing the turbocharged engine to operate with higher boost pressure and earlier spark timing," says BMW's release.
"The result is increased power and torque, and a substantial improvement in efficiency. Despite the extra power output, thermal stress on all performance-related components is reduced. All of these features ultimately help to diminish wear and prolong engine life. The benefits of water injection can be utilized in various ways, depending on engine and vehicle type," explains BMW.
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