|
Pulsating flow usually means the flow is breaking away from the port wall somewhere. The short side bend is the likely culprit. I doubt if the straight part of the port had anything to do with it. You may have changed the flow pattern further down though.
Knife edged dividers between the two runners in 4v heads also often make a strange noise. I prefer to shape them with a rounded form as in classical teardrop shaped streamlined cars or planes. Knife edges are shapes you associate more with supersonic flow. I see no need for them in cylinder heads.
Dave
|