Malossi Manifold D 21x24 angled for kit 1610943 F Morini

The Malossi Ø 21x24 inclined intake manifold is an essential component. 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 entering the combustion chamber and the engine displacement. One of the main influences on volumetric efficiency is the friction encountered by the mixture as it travels from the air filter to the combustion chamber. The intake manifold plays a fundamental role in this process, as it must allow the passage of the mixture with minimal loss.

In addition, the intake manifold acts as a reservoir for the fresh charge, allowing the mixture to accumulate and compress against the reeds when the reed valve closes. Each manifold has a specific range of RPM in which it achieves maximum efficiency (tuned manifold).

The manifold also serves to connect the carburetor to the engine crankcase or cylinder and can dampen vibrations transmitted from the crankcase to the carburetor, preventing fuel and air emulsion in the carburetor float bowl.

With its many years of experience in the field of engine fuel systems, Malossi has developed a new line of rubber and aluminum alloy manifolds for the next generation of scooters. These manifolds have been tested and developed by the Malossi R&D 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 construction ensures a rigid attachment to the crankcase and good elasticity of the manifold body.