When I see the cold water temp on the dyno sheet I know to knock the power number down a little. Not very many bracket guys are set up with a cooling system that lets them pull to the line cold.
We dyno everything at 180 degrees water temp since that is typically what the cars run at. Boat motors get run at colder temps since they'll run colder water in the cooling system.
Guys running E-85 can pull to the line at 160* or less but it was said if its hotter it ran quicker
