Flathed Ford Oil Flow (gph) ?

Simple question - what is the flow in gallons per hour of the oil in a flattie?

There's not a simple answer, I suspect, but let's ***ume 40 psi hot and 0.002" clearance in all crank bearings (don't know about cam bearings - say 0.001").

Some oil may be pushed past the pressure relief valve straight back to the sump pan but what I'm looking for is a figure for the bearings lubrication flow.

Anybody know for sure?

 

How about what grade oil, and rpm to factor into the equation?? any other factors?? Oh and then where are you measuring the flow? many many factors I would think but am curious as to what you find out.

 

Good questions.
Flow would be measured at the input to the lubricaion system - at the output of the pump but after the pressure relief valve on the pump.
If the pressure is maintained at 40 psi, I think rpm doesn't matter.
Let's say 20W-50 oil.