Being that I normally build and race pump gas street and strip motors I have my oil temps between 160 and 200 F and the water temps between 160 and 180 F on all my dyno testing. I've been told by more than one dyno operator, including Jason Pettis, that most motors they test will make more power with colder water temps than what I test with Mine normally don't
As already pointed out more than once, the engine dyno is a tool to measure changes, nothing else
We don't race dynos yet, do we