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The mkiv Supra Owners Club

has anyone used 'water wetter' in the car?


D8MOA
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Used the Redline Water wetter, especially on 300zx tt's, also on 7MGTE mk3 supras as they need all the help they can get in the cooling department, but never seen a real need on the mkiv as the cooling system is actually quite a good one, though it may be something to consider coming into the Summer.

Its no replacement for an under effeciecent cooling system, and i have known people to use it to try and cover up other problem areas.

 

http://www.redlineoil.com/products_coolant.asp?subCategoryID=4

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lol it says a max of 20'c drop in temp? can it really drop it that much?

 

It can, but what they don't tell you is that to get this benefit you have to have a car that has an undersized cooling system to start with (which the MKIV hasn't).

 

AND to get the claimed benefits you have to use it with water only..... no antifreeze!

 

The reason it works (and hence its claims and name) is that it breaks down the surface tension of the water. This gives a LITTLE more cooling ability as the water as the molecules do not 'pack together' at the surface, but spread out along the surface of the metal allowing easier and free movement of the molecules against the hot metal.... so more molecules can reach the metal surface and then move away carrying heat.

This is only a very small improvement in the cooling capacity of plain water, and added to antifreeze will probably not do much as antifreeze probably has additives to break surface tension anyway.

 

The real benefit is it has anti-corrosion additives that allow plain (distilled or de-ionised) water to be used. This is an advantage because the heat capacity of water is much better than a water & antifreeze mix, so the water can carry more heat away.

You can't use plain water in a cooling system due to the corrosion it will cause, but stick in a bottle of water wetter & it will work fine....... for summer only though ;)

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