964 oil pump output Specs at what RPM

[944s4me]

According to BA (Page 64); the 964 pump delivers 65 liters of oil per minute and the scavenge pump has 1.84 times the capacity of the pressure pump.

At what engine RPM are these rated specs ?

65 liters (volume) per minute for the pressure pump.
119.6 for the scavenge pump.

65 liters is roughly 68 quarts that the pump will be able to potentially pump at the relief valve pressure per minute.
The scavenge pump has the capacity to move 125 quarts , 31.25 gallons which is a gallon per second, and there is no relief pressure valve.

I have a 964 pump in my motor, and want to make sure the oil thermostat and the oil cooler / cooler lines have enough volume capacity to handle the potential volume output.
I know some of the scavenge volume will be air which can be compressed.

I want to avoid trying to send more oil from the scavenge side of the pump than the lines, thermostat, cooler and static losses can handle.

Any help and or, real applications that have worked is appreciated.

[Walt Fricke]

I understand your theoretical concern, but in practice -12 lines and fittings (which would include the Mocal Tstat) work fine for the pressurized part of the oil cooling system using the 930 pump, and the GT3 pump, so should be adequate for the 964.

The chart I saved from some Pelican discussion - maybe what you found - didn't give RPM info. But the port on the engine is only so large, and doesn't seem to have changed even as engines and pumps grew larger.

With a remote (as in smubbler's box) oil tank, many use a -16 return line, because it is a suction line, not a pressure line. Some use -16 up, and -20 back. But for the pressure side, including back to an oil tank in the stock location, -12 works fine.

So I think you are imagining a problem which doesn't, in practice, exist, despite the impressive volumes.