I'm installing the RTP oil cooler cooling fan and want to use a thermostatic switch to control it. I've seen summit racings adjustable units with relay, temp probe, and wiring harness, but I would rather keep it simple and use a screw in or in line style. I need to figure out a good temperature range for on/off so I can purchase the correct switch. Anyone know? I tried various searches on the internet with no luck. Thanks in advance.