Cylinder Head Exhaust Flow

[SSDiv6]

Airflow is not linear.

Velocity and behavior of the port is more important than flow numbers.
When flowing heads, a quiet port will make more power than a loud port.
There will always be some turbulence in the port, and many times, necessary.

In addition to the flow numbers, the performance and power is dictated by the camshaft events. If possible, flow the intake and cylinder head as a system.

Like Alan and I recommended earlier, contact a reputable cam manufacturer and share all the numbers including the depression that it was tested at. they should be able to grind a camshaft to maximize the flow curve.