Originally Posted by RacerCutie
I bought a bottle just yesterday.
I'll add it when I get home.
Why the hell are you not running a EG, PG mix? If you absolutly need to put water in there then you better add some water wetter for corosion inhibitance and lube. Heres why:
Why use a Coolant?
----The main purpose of mixing glycol with water is to lower the freezing point and to raise the boiling point of the coolant mixture. Glycol also improves
the anti-corrosion properties of the water. But glycol affects the heat transfer characteristics adversely, to a small extent. Pure ethylene glycol has a thermal conductivity coefficient only 40% that of water. Its thermal diffusivity, a measure of a substance's ability to absorb heat, is about 50% that of water. So, used alone, it is not a very good heat transfer fluid. It is also quite viscous (hard to pump). When glycol is mixed with water, say in the usual ratio of 50:50, the heat transfer capacity of the mixture is reduced, but only about 15% compared to pure water. Everything else being the same, you would have to circulate 15% more coolant volume to get the same cooling effect as water. Conversely, replacing your antifreeze solution with water would improve cooling by 15% or so. A system properly designed for glycol mix should obtain sufficient cooling. But if the heat exchanger (radiator) has been damaged, or has become fouled, then switching to water or a lighter glycol mix could restore some performance. There are not any choices for coolant for service at normal engine temperatures (~200F) that are as benign, cheap and effective as water/glycol mix. Various oils can be used at much higher temperatures Oil plays at least a part in cooling all engines. Some motorcycle engines have oil cooling passages in the head or cylinder walls. Light oil has about the same heat transfer characteristics as pure glycol
Also....Running straight water, regardless of whether it's tap or distilled, usually isn't too good of an idea. Water and the air that will inevitably be mixed in with it will always be corrosive in a cooling system. Also, water pump seals need some sort of lubrication or they'll fail. Never heard of head gasket problems related to pure water, but who knows. Maybe their composition doesn't get along with pure water for some reason. Antifreeze has rust inhibitors in it and acts as a lubricant for the pump seals. These are the exact reasons that companies like Redline came up with products like Water Wetter. Tracks don't allow antifreeze and something needed to fill the gap for corrosion resistance and seal lubrication when running straight water.