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Propylene glycol
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I've heard (can't remember where) that pure water has better cooling =
characteristics than any antifreeze, even though the AF has a higher =
ultimate boiling point. The higher the ratio of AF to water, the worse =
the cooling. =20
Can't say for sure if this is true, since I've not experimented along =
these lines...
take it for what it's worth (maybe nothing)
Larry=20
----- Original Message -----=20
From: DEMETRIS RAPTIS=20
To: scirocco-l@scirocco.org=20
Sent: Wednesday, June 26, 2002 12:42 AM
Subject: Propylene glycol
I noticed something peculiar the other day. It' been very hot lately =
around 90-93F. i was driving my 16V and I noticed that it was running =
cooler than usual around 80-83C water temp and oil temp at 95C steady!! =
I figured it will be a loose ground so I poped the hood . Grounds were =
fine , but coolant was leaking from the sensor on top of the plastic =
coolant reservoir. I fixed the seal temporary so the system holds =
pressure and gave it another ride. It ran at normal temps abit warmer =
than earlier.
Now, everybody knows propylene glycol (Sierra) has better thermal =
conductivity and higher boiling point than ethylene glycol. What if I =
run 100% Sierra in a pressurized system?
in theory it should run cooler. Mecca cooling systems claims so.
Any input?
Demetri
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<DIV><FONT face=3DArial size=3D2>I've heard (can't remember where) that =
pure water=20
has better cooling characteristics than any antifreeze, even though the =
AF has a=20
higher ultimate boiling point. The higher the ratio of AF to =
water, the=20
worse the cooling. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Can't say for sure if this is true, =
since I've not=20
experimented along these lines...</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>take it for what it's worth (maybe=20
nothing)</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>Larry </FONT></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: =
0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A href=3D"mailto:raver@prodigy.net"; =
title=3Draver@prodigy.net>DEMETRIS RAPTIS</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A=20
href=3D"mailto:scirocco-l@scirocco.org"=20
title=3Dscirocco-l@scirocco.org>scirocco-l@scirocco.org</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Wednesday, June 26, 2002 =
12:42=20
AM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Propylene glycol</DIV>
<DIV><BR></DIV>
<DIV><FONT face=3DArial size=3D2>I noticed something peculiar the =
other day. It'=20
been very hot lately around 90-93F. i was driving my 16V and I noticed =
that it=20
was running cooler than usual around 80-83C water temp and oil temp at =
95C=20
steady!! I figured it will be a loose ground so I poped the hood . =
Grounds=20
were fine , but coolant was leaking from the sensor on top of the =
plastic=20
coolant reservoir. I fixed the seal temporary so the system holds =
pressure and=20
gave it another ride. It ran at normal temps abit warmer than=20
earlier.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Now, everybody knows propylene glycol =
(Sierra)=20
has better thermal conductivity and higher boiling point than ethylene =
glycol.=20
What if I run 100% Sierra in a pressurized system?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>in theory it should run cooler. Mecca =
cooling=20
systems claims so.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Any input?</FONT></DIV>
<DIV><FONT face=3DArial =
size=3D2>Demetri</FONT></DIV></BLOCKQUOTE></BODY></HTML>
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