The engine has a redline rev limiter set at 7,500 rpm. A limiter is an extreme type of downward compression. Maximum rudder deflection is controlled by a rudder travel limiter. This action also disengages the g limiter. The rev limiter is set to 6,150rpm. It also displays details for cruise control or the speed limiter. The rebuild also includes the installation of locomotive speed limiter (LSL), and cab signals. The car also had unique engine management software that removed the stock R/T speed limiter. Brundle reported that the car was hitting the rev limiter during the run. These locomotives also have the Ultra Cab II, locomotive speed limiter (LSL), and cab signals. As the car's speed limiter was deactivated, this modification was against the official guidelines. Modern fill valves are usually fitted with an "automatic fill limiter" (AFL) to prevent overfilling. Mopeds in the United Kingdom have had to have a speed limiter since 1977. In this situation, one can use a flux limiter. It is also rumored that the IS F can break without the electronic limiter.