4AG oil pump info...

[oldeskewltoy]

a friend in Canada had this, I thought it appropriate.

[af300e]

I needed pump output figures when I was building a race sump and nobody was able to help with even a rough estimate.
Great info.

[allencr]

I was going to write 'thanks' but after a little look, it's little funny to me.
Where/What did it come from, some sort of Toyota TSB?

It doesn't know the difference between drive & driven and the numbers just don't seem right. A 10 fold increase in RPM makes well over 10 times the output but only 50% more pressure, and that pressure is still 1 bar or kg/cm below the relief opening. The pump isn't exactly positive displacement, but the 6000rpm numbers should be higher unless they're running water or something even thinner through it.

[oldeskewltoy]

I'm no engineer....

could the specs be measured without it being on an engine?

that would explain the apparant excess pressure relief valve - no engine/filter cause backpressure, and the volume to pressure disparity, would it not???

[oldcorollas]

Nissan RB series pumps
Nitto
rpm - L/min (stock) upgrade
750 - (4.6) 6.5
2200 - (15.3) 20.2
7000 - (46.5) 64.8

and for JUN (stock) upgrade
600 - (4.4) 5.5
2,000 - (15.2) 19.5
6,000 - (46.7) 58.9

and Greddy
rpm - KPa - L/min (stock) upgrade
800 - 100 - (4.4) 5.5
2000 - 300 - (15.2) 19.7
6000 - 400 - (46.7) 59.0

not that far from the 4A specs?

I think you will find that the 4A pump specs above, are flow AT the given pressure for the given rpm (like the Greddy). and probably use a fixed viscosity as set out in a JIS standard somewhere.
ie, same as when fuel pumps are rated at 40psi or 60psi or whatever.
When restricted by the motor, of course it will not maximum amount of oil, as the engines oil consumption should be less than what the pump can provide above maybe 3-4000rpm