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The wide-open-throttle (WOT) switch is a voltage activated switch, most commonly used to activate a nitrous system by way of the vehicle's throttle position sensor's (TPS) signal to the engine control unit (ECU). It can be used to activate any number of things and by way of any variable DC voltage signal within the range of the unit. This includes the aforementioned TPS sensor, as well as the manifold absolute pressure (MAP) sensors, even some temperature senders. The unit is factory set to 3.6 volts, but can be adjusted by way of a potentiometer within the unit (can be preset by us here at the Factory), and has an adjustment range of 1.5-5.0 volts. The switch works by picking up a voltage on the "input" terminal, once it sees the trigger voltage, it connects the +12V terminal to the "output" terminal. The "ground" terminal is simply connected to a good chassis ground and is needed to allow the unit to function. While the unit was initially built as a means of allowing a nitrous system to be properly activated in many newer cars using a "drive by wire" throttle, it is easily adapted to many other uses, such as activating a water/alcohol injection system.
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