> > 100% ethylene glycol cools WORSE than 50/50 EG/water mix.

What is the minimum glycol % that ensures corrosion protection? Freezing

is not

really an issue where I live.

Finn

Finn,

I'll try to look up some data in my references at work tomorrow.  But off
the top of my head I seem to recall that the corrosion protection comes more
from the additive packages than the glycol itself.  A 70/30 glycol / water
mix will give you the highest boiling temp (it actually goes down with
higher percentages of glycol), while 50/50 is a standard industry compromise
for high boiling temp with reasonable heat carrying capacity.  30/70 glycol
is about the minimum recommended for freeze/boil over protection, but it
gives a pretty high heat removal capacity.

Tom Kendall

 
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