Running port velocity.
In most cases higher velocity will reduce cam size for a set displacement and RPM.
An exception, when velocity is extremely high for a limited CSA - like Super Stock etc.
A nice formula -
FPS = ( Flow_CFM * 2.4 ) / Average_CSA
But a running engine is not a flowbench. So how does the engines piston demand interact with componets (intake, head, cam)..??
Last edited by pastry_chef; 09-03-2020 at 09:17 PM.
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