I just put a Walker Z-Cool radiator in my truck (350sbc w/350TH) and a 16" electric fan ... 190* thermostat and a temp sensor that turns the fan on at 190* and off at 170*.

The fan comes on at 190*, as expected, and after 20-30 seconds the temp goes down to around 150* and shuts off. I have AC with a large condenser in front of my radiator ... even with the AC on the temp NEVER goes over 190*


~~ Alan Horvath
1954 Chevy Pickup
Singing his praises in the
Passing Lane