Quote:
Originally Posted by carvesdodo
Be careful of eth-gly quantities.
Theres a lot of hoohaa about how wonderful its boilover protection is ... but as the Boiling Point table in the link below shows ... 50/50 is only a few degrees extra benefit compared to plain water. 
Then when you compare that table - with the Specific Heat table ... which shows that eth-gly is not as good as water - for losing heat in the radiator ....
The boiling point gains are a moot point. 
http://www.engineeringtoolbox.com/et...col-d_146.html
Max 50/50 mix if you want to pretend you live in the northern hemisphere ...
30/70 is ample and Aust. coolant brands even supply 30/70 pre-mixed ...
.... and I use 10/90 off the shelf pre-mix. |
Your on the money with you comments !!
The radiator pressure is the key to higher boiling points.
The heat transfer coefficients for EG/water mixes are well below that of straight water. If you have access to a copy of Chemical Engineers Handbook, the theory is explained there.
Well inhibited water is one of the best heat transfer fluids around.