300 degree COOLANT

[Gary Derian]

Non-Aqueous Propylene glycol undergoes nucleated boiling in hot spots, that
means there is minute local boiling that quickly recondenses.  This is great
stuff for good cooling.  It also uses no radiator pressure.  There are some
drawbacks. First it has a low specific heat so the coolant itself has a high
temperature rise as it flows through the engine.  The second is that it has
a much higher viscosity than normal coolants.  Therefore for optimum cooling
performance, special water pumps, lines and a radiator are needed.  All
these are available from Evans.  I think the Callaway turbo Corvette used
this coolant to improve engine life.  I don't know which cooling system
modifications they used, if any.

Regular propylene glycol, mixed with water, is available in auto parts
stores.  Sierra brand which is non poisonous.
>>
>>has anyone heard of a special type of coolant which
>>boils at 300 degrees F instead of 212-250 degrees?
>>
>>I have a 400CI chevy smallblock with heads from a
>>different engine, which don't have steamholes.. so
>>I need to run this stuff.  Any information would be
>>appreciated.
>>
>>thanks,
>>-Jake
>>
>I'm looking for this stuff as well.  I gather that Propylene Glycol is
>what to look for, (as compared to normal Ethylene Glycol).  Can anyone
>confirm that this is the case?
>
>thanks,
>--
>Chris Morriss