Pulley Diameters

I had already shut the engine down & left the electric fans running when I remembered to grab the IR gun, so it had been several minutes before I checked temps.

I "think" top was 205* & bottom 160*. I need to do this test again....

Also, I've never seen you say, but does the temperature cool down once at highway speed?

AND......how close is your temperature sending unit to the thermostat? I also am too lazy to read back and see what temperature thermostat you have.......which one is it?