General Cylinder Head Flow Numbers discussion

[HawkBrosMav]

Originally Posted by SSDiv6

Port velocity and optimize the valve opening and closing events.

Curious what you man by "optimize the valve open and closing events" when it comes to the valve job or flow characteristics of the cylinder head. Maybe I'm just completely naive, but wouldn't this been completely controlled by camshaft design after you already know the flows and velocities of the ports?