Nice to see some empirical testing. The pressure drop doesn't seem significant.
I am curious about the small difference in oil temperature between all the configurations. It's very small. Does that mean that the factory oil cooler is not very efficient or that the test was not sufficient to see how the temperature would vary under real world circumstances(street driving)?
Lastly, what do you do to the pump. I bought a modified one from you guys and compared it (externally) to a spare one I had lying around. They looked identical. I could see no difference in hole size.