Is this right? - Mishimoto Racing Thermostat

M.Bonanni

It also throws a CEL. Just an FYI. The CEL is a sign that the car isn't getting up to 180 degrees which might put the car into constant warm-up mode in which it might run rich trying to build up heat so it might not be a good idea.

Aside from that, in theory, it does work well for the track though, but it all depends on how efficient your cooling system is. Until your thermostat opens, your car's cooling system is not working at 100% efficiency since it is blocking flow to the radiator. Just for the sake of simplicity I will use round numbers. Say your radiator is efficient enough to keep temperatures in check enough to see a maximum gain in water temp of 10% above the temperature in which your thermostat opens under racing conditions. If your thermostat opens at 180 degrees your max temp would be 198 degrees. If your thermostat opens at 160 degrees then your max temp would be 176 degrees.

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