Engine Running too Cool?

This is a great thread! i love playing with cooling systems. There is lots of great information in these posts. Engines do make power at 200 degrees, one of the first automotive lessons I ever learned. One of these guys mentioned the 95% rule as to when damage occurs, he's correct. The argument between 180 and 200 degrees is bunk though. One thing I havent seen in this thread is that there are several points within an engine and cooling system to measure temp. Who or where creates the baseline?...YOU do...Also hardly any measuring equipment are gonna measre the same at different points. Simple math tells you if your motor dont register 170 minimum, you are inefficient. And when you go over around 225 with a 22 lb or lower cap, you got issues. Weather, ambient temp, fan cfm, radiator capacity, driving style, other air conditions, etc all affect the results.