I enter the water at 160, launch about 170, end of run 180, and it starts cooling as soon as I hit the return road. On alky of course!
Leave fan and pump on for approx. 5 mins back in pit back under 160

When I ran gas you could add 20* to those #'s and 10-15mins extra cooling. And that was while being towed up and back for 1/4mile run