Aren't these types of oil
pumps considered positive displacement pumps? In other words, they
displace a certain volume with every turn. If that's the case, it would
seem that a higher volume pump would be a good thing for cooling. The
extra volume would get bypassed at the regulator, and would get sucked
right back out of the pan and sent back to the oil cooler. Just seems
like this would be a way to get more cooling out of a given cooler
size. It might not quite work that way in reality, but I'm just
trying to think of anything that could help oil temps. Not likely
I'll be changing oil pumps.
A higher flow rate can help, but for the
same core, all it can do is decrease the delta T inlet to outlet (ignoring 2nd
order effects like changes in heat transfer coeficient. For the same oil
temp out of the engine, decreasing the delta T will increase the average
rejection temp, thereby increasing the total heat rejected. If the system
is air-side limited, and the delta T is already small, more flow isn’t
going to help much.
Al