What is a rev limiter?

A rev limiter, also known as a RPM limiter, is a device used in vehicles to prevent the engine from over-revving or going past a certain RPM (revolutions per minute) limit. This safety feature is typically found in performance cars, motorcycles, and other high-performance vehicles.

The rev limiter works by cutting off the fuel or ignition system to the engine when the RPM reaches a predetermined limit set by the manufacturer. This helps to protect the engine from damage caused by excessive revving, such as valve float, piston damage, and potential engine failure.

In addition to preventing engine damage, rev limiters can also help improve the longevity of the vehicle's drivetrain, improve fuel efficiency, and ensure a smoother and more consistent performance.

Overall, rev limiters are an important safety feature in high-performance vehicles, helping to protect the engine and ensure optimal performance.