I don't like the idea of hard-wiring a fan. I got my Zetec down to the lower 1/3 of the operating range by installing the infamous 165 degree t-stat, some fresh coolant and a couple bottles of water-wetter.
I live in Florida & the only time the car gets beyond 1/3 is when I'm sitting in traffic. At some point in the upper 1/2 of the temp range, the high speed fan kicks on automatically. Once I get moving for a few minutes the temp drops to the lower 1/3 again.