Not Ranked
I use the type that has a relay, thermoswitch and circuit breaker. The thermoswitch has a 3/8 inch NPT that screws into the intake manifold water jacket. This makes for a cleaner set up. Here in the US several companies sell it. At Summit racing there Electric Fan Thermostat Kit is about $46. The thermoswitch has a fixed on off. You can get it with various temperature ranges.
The original fan switch on my car had a thermoswitch that screwed into the bottom of the radiator overflow tank and did not have a relay. It just acted as a switch to ground when it got to a certain temperature and then opened up as the temperature came down. Very similar to the above but without the relay. I replaced it once but then couldn't find a replacement when it failed the second time. As I remember it was sourced from a 65 or 66 Ford or Mercury.
|