Adding antifreeze to your water will enhance the cooling capabillities. I used to run nothing but straight water in my T-Bird in the summer (I did this because it leaked and we had a lot of pets running around our neighborhood). On really hot days it would overheat. Adding antifreeze would remedy the situation. It doesn't take alot of it either.

__________________
green 85 300SD 200K miles "Das Schlepper Frog" With a OM603 TBO360 turbo ( To be intercooled someday )( Kalifornistani emissons )
white 79 300SD 200K'ish miles "Farfegnugen" (RIP - cracked crank)
desert storm primer 63 T-bird "The Undead" (long term hibernation)

http://ecomodder.com/forum/fe-graphs/sig692a.png