Re: No Evans,,,,,,,,,,,RE: S Car antifreeze

[Igor Kessel <four_rings@worldnet.att.net>]

You wrote:

> There is also the fact that Evans has MUCH less heat transfer ability
> than standard coolant.  Is too thick for most water pumps to be able to
> flow well, and was specifically designed for the corvette originally.

Let's see the facts.

Propylene glycol C3O2H8.
If 50% water solution, @90°C:

1. Density, g/cm^3: 0.977
2. SPECIFIC GRAVITY: 1.04
2. Viscosity, cp: 0.70
3. Thermal Conductivity, cal/cm*s*K: 9.7*10^-4
4. Specific Heat, cal/g*°C: 0.92
5. BOILING POINT, °C: 188
7. FLASH POINT (CLOSED CUP), °C: 99

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Ethylene glycol C2O2H6.
If 50% water solution, @90°C:

1. Density, g/cm^3: 1.017
2. SPECIFIC GRAVITY:  1.12
2. Viscosity, cp: 0.65
3. Thermal Conductivity, cal/cm*s*K: 9.9*10^-4
4. Specific Heat, cal/g*°C: 0.87
5. BOILING POINT, °C: 197
7. FLASH POINT (CLOSED CUP), °C: 111

> The corvette used to run too COOL, and they needed a type of coolant that
> would be able to let the car heat up MORE and they designed this kind of
> coolant.

>From ARCO Chemical:
<<<<<<<<<<<<
Work of Branchi, Bhowmick, McAssey et al (SAE 970940) and Ambrogi,
McAssey
et al (SAE 971827) at Villanova University, PA, concluded that under
typical
operating conditions, the metal temperatures using either EG or PG are
essentially the same.
[...]
The more efficient heat transfer under extreme conditions can result in
lower
coolant temperatures. Operators of racing saloon cars and other vehicles
prone
to over-heating, report significantly reduced temperatures when using PG
coolants.
>>>>>>>>>>>>> 

> Oh yeah, there is also the fact that it is combustable around 400
> degrees.  The race cars that use it usually end up as one big fireball if
> a bit of it leaks.

Both the EG and PG are combustible well below 400°(you meant Farenheit,
I am assuming).
For 96% PG: 210°F
For 96% EG: 232°F 

-- 
Igor Kessel
Three turbo quattros