Cylinder head with machined intake port and process for manufacturing

摘要

A cylinder head with improved intake ports and a process for manufacturing such a cylinder head are provided. The process includes providing a cast cylinder head having a cast intake duct with an intake port that opens to a combustion side of the cylinder head and machining a first portion of the intake port so that the first portion has a cylindrical wall that extends generally perpendicular from the opening by a predetermined depth. In an embodiment, the process also includes machining an angled portion of the cast intake port so that the angled portion has a wall that extends adjacently from the first portion at an angle relative thereto. A cylinder head manufactured using the inventive process is also disclosed.