Running hot.. Can't figure out why.. Please help.

I found removing the T-Stat drops the temps a little more. I know, they say the coolant runs though too fast and maybe your type of rad matters but its just a $2 gasket to remove it and see what happens. My motor runs around 170 to 190 in the summer--with no T-stat. I gotta be getting one soon up here for the cool fall weather.