Which is better 180* thermostat or the 160*

super302 said:
put in the 180*, it's around the ideal engine operating temp...just make sure it doesn't get to 210+, the water will boil away :(
not quite. water at sea level boils at 212. a 50/50mix will raise the boiling point about 10*. when the system has 14-16 psi of pressure, the boiling point is raised 40-50*. :)