Restrictor

We say that the rate of water flow through an aperture restrictor is proportional to the difference in water pressure across the restrictor.

A height restrictor, referred to as a ‘goal post’ would also be put in place as part of the reshaping of the location, to deter oversized vehicles.

A restrictor plate uses adjustable plates inside of a housing to limit airflow into the vehicle’s carburetor, thereby limiting performance.

Little do the people of Panaca know that a native to the small farming town is revolutionizing the racing world with a simple air restrictor and a dream.

Like at last weekend’s Xfinity race at Pocono, NASCAR used a restrictor plate package.

That could very well be the result of this package that includes horsepower-sapping restrictor plates.

Earnhardt swept both races for the year at Talladega, leading some to conclude that Earnhardt's talent had become limited to the restrictor plate tracks, which require a unique skill set and an exceptionally powerful racecar to win.

In the August race at Michigan, Earnhardt led laps late in the race and nearly pulled off his first win on a non-restrictor-plate track since 1996.

It is one of the four restrictor plate races on the Sprint Cup schedule.

NASCAR eventually adopted a restrictor plate to limit top speeds for the 7.0L engine as teams switched to small-block 358 cu.in. (5.9L) engines.

The R8s (which were built to old LMP900 regulations) received a narrower air inlet restrictor, reducing power, and an additional convert of weight compared to the newer LMP1 chassis.

This later became known as restrictor plate racing.