David Vizard - Which to prioritize - PORT FLOW or PORT VELOCITY?

273 said
At 20:00 he gives formulas for velocity, but they don't seem to work.

Peak rpm = port velocity (ft/sec) x port area (sq in) x 360 / cid

Port velocity = cid x rpm / port area ( sq in ) x 360

Eg.. 320 ft/sec x 2.14 sq in x 360 / 360 cid = 685 rpm ? That's pretty far off

360 cid x 6500 rpm / 2.14 sq in x 360 = 3037 ft/sec ? Same way off