Downside of Cooler Radiator Temperature Switch?
 

On an '84.

I know it will turn on the fans sooner, but does it have any unintended consequences?

For instance, will it put a strain on the fan relay and on the fans themselves?

No not if you use the rigth one witch is 75°/70° don't go colder then that.
http://forums.pelicanparts.com/uploa...1274156726.gif

You have to match the thermostat and the fan temp switch, or the fans will just run with no coolant flow across the radiator.

+1...match them up

cooling systems are touchy things - there is such a thing as "too low" or "too cool"

a perfect system will run 5-15 degrees above the thermostat point, and will vary no more than 20 degrees, regardless of operating condition

also, gasoline engines operate best when the coolant is 190-195 degrees (though emissions are reduced if it is more like 205)

that being said, fans should operate so as to come on just before the temperature of the coolant gets to the upper end of the acceptable range, and then shut off - dual speed fans should have the high speed fan come on during any anomalous condition that exceeds that range or adds unusual load

also, shrouding plays a large part in the efficiency of a cooling system - never delete fan shrouds or belly pans - contrary to common misconception, belly pans are there to IMPROVE cooling - removing them allows too much extraneous air into the engine bay, thereby reducing the negative pressure required for optimal flow through the radiator - in a perfect world, the only air allowed into the engine bay would be required to pass through the radiator first to get there

75°/70° is too low, unless running 160° (F) T-stat, which, for all intents and purposes, would be too low anyways.

Advice? --- Stick With Stock!