Editing Restrictor plate (section)

== Rallying ==
After [[Group B]] cars were outlawed from rallying because they were too powerful (rumored to have reached 600&nbsp;hp), too fast and too dangerous, the [[Fédération Internationale du Sport Automobile|FISA]] decided that rally cars should not have more than {{convert|300|hp|abbr=on}}. For a while no special restrictions were needed for that (e.g. the [[Group A]] [[Lancia Delta#HF4WD|Lancia Delta HF 4WD]] had about 250&nbsp;hp in 1987). But with development in the 1990s, [[Group A]] cars were rumored to have reached 405&nbsp;hp or more. So the [[Fédération Internationale de l'Automobile|FIA]] mandated restrictors for [[supercharged]] and [[turbocharged]] engines in all categories ([[World Rally Car]], [[Group A]] and [[Group N]]).

This means that the rally version of a car like the [[Mitsubishi Lancer Evolution]] may have less power than the street version (the "280" hp Evo VII was believed to have more than 300&nbsp;hp, and in some markets the FQ-320, FQ-340, FQ-360, FQ-400 versions were sold, with the number representing the total horsepower).

It also means that the [[torque]] and [[Power (physics)|power]] curves of the engine are unusual. The engine produces peak torque and almost maximum power at a relatively low RPM, and from there to the [[rev limiter]] the torque drops and the power does not increase much.

In 1995 [[Toyota Team Europe]] used an illegal device to bypass the restrictor (allowing an estimated extra 50&nbsp;hp).
Due to this the team lost their results in the 1995 season and was banned from rallying until the end of 1996.