[Steve C.]

Information regarding the BBC oil pump was for interest, not intended to be a direct comparison.

Again, "We've never seen a noticeable performance loss from the added load," says Butler. "Racers will sometimes run a 60-psi pump to reduce parasitic drag and free up a few horsepower. While that's acceptable in a dedicated race engine that's frequently torn down, it's certainly not something we recommend for all engines."

So how much is that 'few', want to guess.


.

[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

Calculate HP to Drive Oil Pump

http://www.wallaceracing.com/oil-pump-hp-calc.php

Too simple ? Influenced by engine RPM, weight of oil, temperature, etc ? ?


.

[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.