Cooling fan activation at 80℃ (stock 95℃)

Cooling fan deactivation at 75℃ (stock 90℃)


There is a close relationship between the water temperature and engine power.

When the cooling water temperature reaches a certain point, in order to avoid possible risks, the ECU will make several changes including fuel increase and retarding the ignition point which will cause a reduction of engine power.


The purpose of this product is to maintain the maximum horsepower by keeping the temperature of the cooling water at around 75℃ – 80℃. It activates the fan at 80 instead of 95 and fully utilizes the water characteristics of high specific heat (Water changes temperature slowly for both upward and downward).  As a result, it works toward preventing power loss, knocking, and various thermal negative effects. It works well for all types of cooling system from the stock radiator to a multi layer racing radiator.


Furthermore, by setting the cooling fan activation point (80℃) and deactivation point (75℃) closer, it smoothes out the on-off flipping operation.



S2000 Low Temp Thermo Switch

  • Please use it along with the low temp thermostat.  When used separately, it is not very effective.


    Please use the proper tightening torque.

    After the installation, bleed the air completely.

25911 104th Ave SE Kent, WA 98030

Contact: 253.872.0872

Fax: 253.872.0778

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