Pretty sure everyone would agree on what the normal oil pressure range should be although perhaps differences of opinion on the minimum acceptable on an older engine.
Another question that has come up is regarding how long it should take for pressure to come up at the gauge, and that has been covered also.
So what I got to thinking about is that the pressure gauge is at the end of the loop so to speak as is best practice for locating a gauge. What is different though from (almost all) automotive applications is that the oil line tees off to the (partial flow) oil filter.
So in reality, aren't we measuring to a large degree the flow resistance through the oil filter on the return? To illustrate, if you disconnected the line to the filter would not the gauge read nearly zero psi ? Likewise if you plugged the line then you would be reading the pressure that the relief valve (assuming it could handle the flow) was controlling, with all other return flow to the pan going past the bearings, etc.
I wonder also if a badly clogged filter would potentially increase the pressure reading at the gauge ?
Another question that has come up is regarding how long it should take for pressure to come up at the gauge, and that has been covered also.
So what I got to thinking about is that the pressure gauge is at the end of the loop so to speak as is best practice for locating a gauge. What is different though from (almost all) automotive applications is that the oil line tees off to the (partial flow) oil filter.
So in reality, aren't we measuring to a large degree the flow resistance through the oil filter on the return? To illustrate, if you disconnected the line to the filter would not the gauge read nearly zero psi ? Likewise if you plugged the line then you would be reading the pressure that the relief valve (assuming it could handle the flow) was controlling, with all other return flow to the pan going past the bearings, etc.
I wonder also if a badly clogged filter would potentially increase the pressure reading at the gauge ?