Originally Posted by jeepsr4ever
I think you are reffering to the valving action of the crank not necessarily feeding oil constantly through 360 degrees of rotation.
Think of a chamber pressurized to some psi. Attach a series of valves to it that are all timed to open and close sequentially. If there is pressure in the chamber while these valves are cycling it would be equal throughout.
Such a chamber is in effect what the lifter galleries are. The fact that oil is not being fed through each lifter or crank bearing all the time would make no difference as to the mean pressure being equal throughout the gallery.
Why would you feel the need to restrict oil flow through the valvetrain and cam bearings at low rpm?