With proper functioning radiator, waterpump and fan your car should be fine with a 180* thermostat. You may need to have your radiator recored or simply replaced. I run a stock turbo 3 row radiator with the factory fan and have no proublem with cooling. This is in Dallas with the temps getting pretty high durning most of the year but, during the summer it gets real hot. Make sure your radiator is not cloged with junk and replace the thermostat with a 180* unit from Nissan.