[magicmerll]

I can't believe that nobody has mentioned the obvious....100% water? Why no ethylene glycol?

Antifreeze/Coolant raises the waters ability to store heat, thus reducing temperature and boiling point. Try a conservative 70/30 mix of water to coolant. Underdriven pulleys get blamed for cooling problems more often than they should, and of course the water pump manufacturer wants you to spin their pump as fast as you can.

Also, if you're fan is less than 18" diameter, and you have any serious engine mods, you are simply not getting enough air! Notice how the car cools once you get down the road? That's because it's moving more air!!! Don't put the power-sucking factory fan back on this car. Simply upgrade to a larger fan, or try installing a 'pusher ' fan on the opposite side of your radiator.

I have had these cars going 12's with the stock cooling system. There is no reason to have cooling problems, period.