Thermal conductivity is relatively unimportant for a cooling system operating under a turbulent regime. Heat transfer coefficient and thermal conductivity are the respective measurements for these parameters. Evans Cooling high performance waterless engine coolant will also eliminate corrosion and offers protection to temperatures as low as -40. The low vapor pressure reduces stress on the engine cooling system components. Specific heat is a measure of how much energy the coolant can adsorb and has no relation to how well (or fast) it may transfer to another surface or conduct heat within the fluid. This coolant has a boiling point of 375 degrees F and will not vaporize-eliminating overheating, boil-over, and after-boil.
So the temperature increased by 44oF after converting to the Evans product.īy having engine cylinder head temperatures 128oF hotter with the Evans product, a number of performance setbacks were observed: (1) the octane requirement was increased by 5-7 numbers, (2) the computerized ignition system retarded timing by 8-10o to avoid trace knock, (3) horsepower was correspondingly reduced by 4-5%, as confirmed on a chassis dyno. We saw a stabilized bulk coolant temperature of 192oF with water and No-Rosion, and 236oF with the Evans product. (No-Rosion does not alter the specific heat capacity of water.)Ĭylinder head temperatures of 115-140oF hotter with the Evans products translates to a stabilized bulk coolant temperature increase of 31-48oF, as compared to No-Rosion and water.Īs case in point, conversion of a Chevrolet LS-1 engine from No-Rosion and water to Evans Waterless Coolant resulted in an increase of 128oF at the cylinder heads. So they conduct roughly half as much heat as does water, or water with No-Rosion.
Comparatively, the specific heat capacity of the various glycol solutions in the Evans products ranges from 0.64 to 0.68. It transfers heat more effectively than any other fluid, and is therefore used as the reference fluid in the scientific measure of specific heat capacity. Water has a specific heat capacity of 1.00. The reason for hotter cylinder heads relates to the specific heat capacity of these different fluids. After proper conversion to the Evans products, the average temperature of engine cylinder heads increased by 115-140oF, versus running with No-Rosion and water.
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