[Tom Vaught]

Originally Posted by Steve C.

Maximum oil flow on a Pontiac stock-type 60- or 80-psi pump with a stock pickup screen is usually 12-13 gallons per minute (gpm).
Source: Jim Butler
.

I believe I got that info at one time from the Melling Engineers, and possible could have passed it on to Jim. This was many years ago when Marty Palbykin was researching trying to increase the pump volume by adding a extra section on the gears and a cast iron spacer below the normal plate location.

I believe that the experiment did not work out at the time.
Melling sent me several pumps to look at the different Gear drive options available.

Tom V.