ANY oil pressure at idle hot is fine. Our 500" inline 6 cyl CNG buses barely register @ idle hot and have NO issues, dragging around 33K pound transits running 21psi boost. The big diesels are the same lot's of boost and hardly any hot idle oil pressure- 10 psi/1000 rpm just works, more than that you are throwing away power and overheating your oil by pumping it past the bypass back into the crankcase.
If you don't run any spring pressure. The higher the spring pressure, the harder the low oil pressure at idle is on cam bearings, pushrod cups, adjusters and rockers and shafts. Anything over 120 on the seat and you need more idle oil pressure.
Roller cam bearings have more than one person.
