There all fluids, correct, air or liquid work
Think about water flowing down a drain tube or toilet, doesn't it swirl as it enters the smaller part of the tube, venture, or exit work scope
That being said every production 460 Ford head and 351 C motors had round ports in them, correct shruggy

Last edited by Cab_Burge; 08/28/18 04:55 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)