A Custom intake the Create for your Vehicle for Restoration or Racing.
The primary function of the intake manifold is to evenly distribute the combustion mixture (or just air in a direct injection engine) to each intake port in the cylinder head (s). Even distribution is important to optimize the efficiency and performance of the engine. It may also serve as a mount for the carburetor, throttle body, fuel injectors and other components of the engine.
Due to the downward movement of the pistons and the restriction caused by the throttle valve, in a reciprocating spark ignition piston engine , a partial vacuum (lower than atmospheric pressure ) exists in the intake manifold. This manifold vacuum can be substantial, and can be used as a source of automobile ancillary power to drive auxiliary systems: power assisted brakes , emission control devices, cruise control , ignition advance, windshield wipers , power windows , ventilation system valves, etc.
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