Contour Enthusiasts Group Archives Forums Modifications 3.0L Duratec 3.0L Running Temps???

There is no appreciable difference in heat generated between 2.5 and 3L engines under normal load and idle.
Only under full throttle where the increased intake charge causes some increased heat would I be concerned about it. I haven't heard of any other SVT 3L setups having difficulty with heat, starting with myself and I toured around phoenix visiting my friend all the time.

I'm beginning to think your radiator may have become less efficient due to sediment buildup or perhaps the cooling fins are full of dust.
Think about all the normal 2.5L that do fine in AZ temps with the smaller radiator and ATX. The SVT radiator only really comes into play under track/racing conditions of continuous full throttle. It should be more than sufficient for any 3L.