Hi,

 

Just Browsing the Mustang forum for a mate who has just bought one!

 

I saw a post on there saying that antifreeze does not have as much thermal capacity as water and if you want your car to run cooler you are better off using the lowest ratio of antifreeze to water!! Weather permitting of course!!!!

 

I admit to being puzzled as it usually says on the tin summer coolant and antifreeze??????????

 

Answers on a A4 piece of paper please!

Originally posted by TopLess

Hi,

 

Just Browsing the Mustang forum for a mate who has just bought one!

 

I saw a post on there saying that antifreeze does not have as much thermal capacity as water and if you want your car to run cooler you are better off using the lowest ratio of antifreeze to water!! Weather permitting of course!!!!

 

I admit to being puzzled as it usually says on the tin summer coolant and antifreeze??????????

 

Answers on a A4 piece of paper please!

I read around 1/3rd antifreeze to ratio of water?

but i have read loads of others lol, defo not use all antifreeze.

You also get a substance called "wetter water">? thats supposed to cool aswell.

Yep Redline do Water Wetter, it lowers the surface tension of the coolant so it 'sticks' better to the walls of bores, head etc so the heat is transferred more efficiently to the coolant.

 

http://www.redlineoil.com/redlineoil/wwti.htm

 

I think most antifreeze these days does contain water weting agents, hence advertised as Anitfreeze/Summer Coolant.

 

It depends what climate you live in and how much freeze resistance you want but I generally use about 30% AF, it aslo stops the block from rusting.

yup... you're right.. 1/3 coolant is about right.... Coolant has got 2 critical properties 1) a higher flash/pour point compared to Water & 2) anti-rust properties.

 

The following table provide a typical general guide of density:

Concentration Density at

20*C 60*C

25% (1:3) 1.039 1.020

33 1/3% (1:2) 1.057 1.034

50% (1:1) 1.080 1.057

 

 

Typical freezing point values are given below for in de-mineralised water. However, cooling below these values does not immediately produce a solid mass and protection against frost in practice extends below the defined freezing point.

 

Concentration First Crystal Formation

25% 1:3 -14°C

331/3% 1:2 -20°C

50% 1:1 -39°C

 

Hence, its all about ensuring a good balance between coolants & water...

Hi Rai,

 

Can I ask what you mean by flash point/pour point?

Hi TopLess,

 

in simple terms

 

"Flash point" means the minimum temperature at which a liquid gives off vapor within a test vessel

(ie Water evaporates at 100deg C)

 

"Pour Point" is the point when a particular liquid hardens & stops flowing (ie water solidifies at Odeg C)

 

hope that explains :)