A warm air intake (WAI) also known as a hot air intake (HAI), is a system to decrease the amount of the air going into a car for the purpose of increasing the fuel economy of the internal-combustion engine. This term is sometimes used erroneously to refer to a short ram air intake, which is another engine modification that aims to improve power output by increasing the static air pressure inside the intake manifold.
A warm air intake (WAI) also known as a hot air intake (HAI), is a system to decrease the amount of the air going into a car for the purpose of increasing the fuel economy of the internal-combustion engine. This term is sometimes used erroneously to refer to a short ram air intake, which is another engine modification that aims to improve power output by increasing the static air pressure inside the intake manifold.
Source: Wikipedia "Warm air intake" · CC BY-SA 4.0
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