OK I’ve think I get it. The most restrictive point controls the pressure and therefore the volume. The pump’s release valve creates an upper limit, but the most restrictive point may also.
I was focusing on the restriction and how that limited the volume but that volume must be constant...
I'm not a student. I'm a 64 year old guy trying to determine the flow change (volume) in an V-8 engine oil gallery.
The feeding gallery comes directly from the oil pump and is 7/16 inch. It ends at a 90 degree intersection with a 3/8 inch gallery. I understand the loss of volume due to the...