![]() Once you get past the marketing hype and internet mythology and look at the science behind both, you can make an informed choice which type will work better for you and your car in your climate. For some engines, cooling systems, and climates it may not be an issue, and for some, they'll run hotter than before. With the right additive packages the disadvantages of water based coolants can be mitigated, however nothing can be done to the Evans coolant to improve its specific heat capacity. but water has the highest specific heat capacity of any heat transfer fluid, so it's excellent at transferring heat from the engine to the radiator. ![]() Water based coolants have all the issues of corrosion, microbubbles, possibility of cavitation, etc. That's why engines with marginal (and sometimes even with upgraded systems as INTMD8 mentioned) cooling systems tend to run hotter with it. With the proper flow rate the colder coolant will cycle thru and close the thermostat and the cycle starts over.Įvery coolant has its advantages and disadvantages and compromises.Įvans has all the advantages that Scott mentioned, however it's not that effective at removing heat because of its low specific heat capacity. What needs to be kept in mind is that the thermostat is what regulates the engine temp, the t-stat cycles open/close when it's closed the coolant in the system on the radiator side needs to be getting cooler so that when it cycles open the exchange is made. reducing the surface tension of water is the goal of most all coolants, while also preventing freezing at low temps.Įvans is unique in that it does not require pressure to raise the boiling point, that reduces the stress on older systems.įrom what I've noticed it that it is far more efficient at keeping an engine in it's proper heat range then water/glycol mixes. The cooling system of an engine is more then just a pot of water getting hot, thermal transfer and flow. Not to mention straight water lacks lubricants for the water pump seals. ![]() While water does indeed have a higher specific heat capacity it's not useful when it forms micro bubbles and steam pockets. Click to expand.The big positive is electrolytic corrosion is no longer an issue, Al and steel make nice batteries with traditional coolant. ![]()
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