Swapping a 180 degree T-stat for a 160 degree T-stat

Any one pick up any E.T. switching from a 180 degree T-stat to a 160 degree T-stat? I should also ask, what engine temp do you like to see at the starting line?

Ryan,I run a 160* thermostat...runs cooler than when I had a 180 in it. I like to pull to the line at about 150*-160* RandyB