www.kingmotorsports.com
This thermostat has the operating temperature set lower than normal. It prevents engine power loss by minimizing rapid water-temperature rises under harsh conditions such as during circuit driving. The use of a flow-control-type valve prevents hunting, thereby achieving rapid stabilization of the water temperature (the engine warms up within a short period).
Operating temperature: 68°C (STD.: 76~80°C)
Full-throttle acceleration temperature: 83°C (STD.: 90°C)
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Activates cooling fan at 80°C instead of the stock 93°C. Requires use of Mugen low-temp thermostat.
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looks like all it does is work to lower the engine temp, as well as heat it up faster. it might be worth it, depending on certain factors. but oh well...