systems allow the ECU to modulate throttle position to keep engine speed in a safe range. This is by far the safest method of limiting engine speed and is used on most modern production cars, as they don't use a throttle cable.

Hard-cut vs. soft-cut limiters

Hard-cut limiters

Hard-cut limiters completely cut fuel or spark to the engine. These types of limiters activate at the set rpm and "bounce" off of it if throttle is applied. This phenomenon is referred to as hysteresis. The

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