thermostat removal

My big block makes 525 HP, aluminum heads, intake and Stock style aluminum waterpump. I have a 22" Smiths aluminum rad, 3" tanks and 2 large 1.5" rows. My car ran warm all the time until i got rid of that waterpump, and replaced it with a Flow cooler high flow waterpump. Best money i ever spent was on that flow cooler pump. I bought a Robert shaw 180 high flow Tstat as well. Result = tstat opens at 185 on the gauge, closes at 175. Then repeat.