Re: [Chrysler300] Freezing, boiling, glycol & etc.

["Roger Schaaf" <obiwan10@xxxxxxxxxxx>]

Rich

Great information..  Someone who knows all that makes me understand why you
are looking only for a B.

Just changed the coolant in my 33 year old Corvette.  I do this every couple
of years even though I seldom drive the car anymore.  Radiator nor heater
have ever been replaced or even flushed(have changed one water pump and all
hoses twice) except with water when changing coolant and still looks as new
from what I can see when I look into radiator with a flashlight.  Regular
maint is good as I have seen some cars at 5 years of age with destroyed
radiators.

This has nothing to do with coolant, but the AC on this car has only had
perhaps a pound of freon added in 33 years(no other service or repairs at
all) and still works perfectly.  Who knows why, I am not complaining.

Roger Schaaf
300 B California
----- Original Message ----- 
From: "Rich Barber" <barber@xxxxxxxxx>
To: "Ray Jones" <hurst300@xxxxxxxxxxx>
Cc: "Charlie Valentine" <cross.ram@xxxxxxxxxxx>; <greektruck@xxxxxxx>;
<Chrysler300@xxxxxxxxxxxxxxx>
Sent: Saturday, June 12, 2004 6:15 PM
Subject: [Chrysler300] Freezing, boiling, glycol & etc.


Just a couple of approximate values for reference:
None of these relationships are very linear over wide ranges.

Atmospheric pressure=14.69-0.43*(Elevation/1000)  Sea level=14.69 psia,
Pikes Peak=8.63 psia, Denver-about 12.1 psia
Boiling Point of pure water=211.86-1.84*(Elevation/1000)  Sea
level=211.9 degrees F., Pikes Peak=186.1 degrees F,  Denver-about 202.4
degrees F

Dow shows these properties for ethylene glycol solutions and indicates a
64 degree increase in BP for 50-50 mix.  There was no indication of any
specific pressure cap.
30%: FP= +3F, BP=265F
40%: FP= -13F, BP=270F
50%: FP=-35F, BP=276F

 From an efficiency standpoint, the hotter an engine runs, the more
efficient it can be.  The tradeoff is efficiency vs. part life.
Emissions come into play as higher temperatures can generate more NOX.

Engineers develop efficiency curves for engines at various RPM and
torque.  It would be interesting to compare the charts for a 1955 C300
and a 2005 300C.  Computer-controlled fuel injection and ignition reduce
the compromises required for carbureted engines with ignition timing a
function of RPM & vacuum.

Sorry for the engineering rant.  I hope it sheds some light.

Rich Barber

Ray Jones wrote:

>Years ago, and maybe still now, the recipes on baking packages had
>instructions for high elevations. This was because the pressure was loweer
>above 5K feet, and it lowered the boiling point to the 190's, and changed
>all the cooking characteristics.
>As the operatation of modern engines changed, the need for higher temps
>raised the cap pressures. The actual temp of today's engines is way higher
>than the sealevel boiling point.
>
>But the most likely culprit is the guage/sender being inaccurate, and
giving
>a high reading.
>
>Hot (90's) in Arkansas, Ray
>
>





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