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Propylene glycol
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Absolutelu true. The problem with running only water is corosion and =
vaporization which leads to hot spots in the head, hence knocking.Using =
WaterWetter seems to help with that.Factory likes to use antifreeze to =
avoid frozen engines, but they admit more than 50% results in =
overheating.Propylene glycol absorbs heat better than ethylene glycol , =
it's a surpising auto companies did not make the substitution yet ( =
maybe propylene glycol is more expensive? ). Another thing to consider =
is the higher viscosity of 100% glycol in the cooling system. It will =
lubricate the water pump, but it might wear it out faster.
----- Original Message -----=20
From: Larry=20
To: DEMETRIS RAPTIS ; scirocco-l@scirocco.org=20
Sent: Wednesday, June 26, 2002 11:23 PM
Subject: Re: Propylene glycol
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>Absolutelu true. The problem with =
running only=20
water is corosion and vaporization which leads to hot spots in the head, =
hence=20
knocking.Using WaterWetter seems to help with that.Factory likes to use=20
antifreeze to avoid frozen engines, but they admit more than 50% results =
in=20
overheating.Propylene glycol absorbs heat better than ethylene glycol , =
it's a=20
surpising auto companies did not make the substitution yet ( maybe =
propylene=20
glycol is more expensive? ). Another thing to consider is the higher=20
viscosity of 100% glycol in the cooling system. It will =
lubricate the=20
water pump, but it might wear it out faster.</FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-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 title=3Drocco16v@netzero.com =
href=3D"mailto:rocco16v@netzero.com";>Larry</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Draver@prodigy.net=20
href=3D"mailto:raver@prodigy.net";>DEMETRIS RAPTIS</A> ; <A=20
title=3Dscirocco-l@scirocco.org=20
href=3D"mailto:scirocco-l@scirocco.org";>scirocco-l@scirocco.org</A> =
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Wednesday, June 26, 2002 =
11:23=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: Propylene =
glycol</DIV>
<DIV><BR></DIV>
<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=20
a higher ultimate boiling point. The higher the ratio of AF to =
water,=20
the worse the cooling. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Can't say for sure if this is true, =
since I've=20
not 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"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-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 title=3Draver@prodigy.net =
href=3D"mailto:raver@prodigy.net";>DEMETRIS=20
RAPTIS</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dscirocco-l@scirocco.org=20
href=3D"mailto:scirocco-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=20
it was running cooler than usual around 80-83C water temp and oil =
temp at=20
95C steady!! I figured it will be a loose ground so I poped the hood =
.=20
Grounds were fine , but coolant was leaking from the sensor on top =
of the=20
plastic coolant reservoir. I fixed the seal temporary so the system =
holds=20
pressure and 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=20
glycol. 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=20
size=3D2>Demetri</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>
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