Sorry, doesn't really apply (to any measureable degree).NewTune wrote:Consider the way a typical air conditioning system works. The high pressure gas passes through an orifice tube or an expansion valve to the low pressure side where it sheds latent heat in the evaporator. I think the same thing takes place in a cars cooling system, however on a much smaller scale.
The heat transfer in an HVAC/regrigeration setup is due to the compression and expansion of gases.
Just like how nitrous, propane, or CO2 comes out of a bottle freezing cold. Because they get to expand a BUNCH as they go from liquid to gas.
The coolant in your engine and radiator is supposed to stay liquid (unless it boils). Therefore, it isn't compressible (to any meaningful degree). So, you don't get that benefit that you do w/ the refrigerant system or bottled gas.
My money would be on the trestrictor causing a bit more backpressure in the block which reaises the boiling temp inside the engine - forcing coolant to stay liquid instead of steam (and preventing the 'water drops dancing on the hot skillet' effect that keeps a hot spot from getting cooled.
-Bill
