Ideally, a cooling fan switch needs to be adjustable. Fan switches for recently-manufactured vehicles are usually set to turn on at 220 degrees, and switch off at 200. Since the average stovebolter gets an attack of the vapors if the temp gauge gets up to 200, the fan will never come on. Even using a 7 lb. radiator cap raises the boiling point of the coolant to 233 degrees, so most of that concern is misplaced, but there's no sense arguing with someone with the attitude "My mind is made up- - - -don't confuse me with facts!" With a high pressure rated radiator and heater core, a 14 lb. cap brings the boiling point up to 257 degrees!
If the coolant temp rises much above the thermostat setting, there's either not enough radiator, an incorrect fan position, or a dirty cooling system. Running an electric fan is like taking a big dose of aspirin for the headache caused by a brain tumor- - - - -you're treating the symptom, not the cause of the problem!
Jerry
