Malossi Intake Manifold D 20x24 angled for PHBG carburetors

The Malossi Ø 20x24 inclined intake manifold for PHBG carburetors is an essential component for the proper functioning of the engine. This intake manifold allows the air-fuel mixture to enter the combustion chamber through the reed valve.

The overall performance of the engine depends on various factors, including volumetric, thermodynamic, and mechanical efficiency. Volumetric efficiency represents the ratio between the amount of mixture introduced into the combustion chamber and the engine displacement.

To achieve high volumetric efficiency, it is important to minimize friction losses that the mixture encounters during its path from the air filter to the combustion chamber. The intake manifold plays a fundamental role in this process, as the mixture must pass through it without significant losses. Therefore, it is important to avoid sudden increases in section and sharp edges along the mixture's path.

In addition to promoting volumetric efficiency, the intake manifold also acts as a reservoir for the fresh charge. When the reed valve closes, the mixture accumulates in the manifold, compressing against the reeds. Each manifold has a range of engine speeds in which it expresses maximum efficiency.

The intake manifold also serves to connect the carburetor to the engine crankcase or cylinder and dampen vibrations transmitted from the crankcase to the carburetor. This prevents the phenomenon of fuel and air emulsion in the carburetor float bowl.

Thanks to its many years of experience in engine fuel systems, Malossi has developed a new line of rubber and aluminum alloy manifolds for the new generation of scooters. These manifolds have been tested and developed by the Malossi research department, both on the road and on race circuits.

Malossi rubber manifolds feature a composite structure, with an aluminum insert embedded in a plastic material resistant to oils and fuels. This ensures a rigid attachment base to the crankcase and good elasticity of the manifold body. Thanks to these characteristics, Malossi manifolds offer optimal and long-lasting performance.