Well I just I just finished installing a Dodge Dakota electric fan from a V8 model. At idle it turned on at about 200. I also hooked up a switch just in case. I had a 14" fan that would not turn on. I figure I put the sensor too low. This time I put it right under the top radiator hose. I also wound up putting in a new radiator as I accidently cut a tube with the pliers while trying to remove the 14" fan. The Dodge fan is about 16" or 18". I priced a Linclon Mark VIII at $125 at the local junk yard. I may look around for a Taurus or a Thunderbird fan. The 14" was just way too small and I was running 210 on the highway. I will find out tomorrow how well the Dodge fan does. I'll post the result Saturday.