We do as Bill does, we have accusumps on many of our motors. But only to prelube before start up. We use one on the dyno also. You will find that there is indeed air trap in the container. Remove the intake and or watch at the rockers and you will see aeration. And Bill is correct in that the hydo dynamic wedge is lost if engine is running. You will need to make a decision which is worse, a drop in pressure as a result of starvation in the pan or aereated oil. Both are killers of engines. My opinion.
racear