[Bruce Edwards]

The early cars first cars ever made did not have water pumps but used only coolant to keep the engine cool. This was done by using a larger rad and letting the cooler water flow into the engine by the hot water rising to the top. Running the fans after engine shut down will do the same thing till the stat starts to close if you run it that long. We set up our cars to run till the temp sensor on the fan drops below the pre set temp and breaks the relay.
Helps cool the engine for easier starts and does cut down on boiling fuel out of the carb on those hot Florida days.
The way we set them up you drive the car, shut it of after your trip and if the engine is to hot the fan will run till it cools off. Jump back in after your visit and go with a engine that is not heat soaked.