[leegreen]

I have dual electric puller fans on a factory AD rad in front of a 250 6. I went with dual as there was not room for a fan motor between water pump and rad.

The largest dual fans you can fit on the rad are dual 10". I have a shroud that covers the rad with only the 2 10" holes. This works OK, when the fans trigger they pull the temp down quickly.

I'm going to open the shroud up a bit more though, I think it will cool better on hot days (anything over 25C is hot for me) in moderate traffic, as it is the fans come on and off more than I'd like. They also come on quite quickly when you come off the highway. I have an override switch on the dash to just turn them on independent of the thermal switch, so I ran that on hot days last summer.

If I wire dual fans again I might go for two thermal switches so one fan comes on at a lower temp than the second, or wire two override switches so I can run one or both.