I know what a restrictor plate does, but what exactly IS a restrictor plate?

Question

I know what a restrictor plate does, but what exactly IS a restrictor plate?

Answer 1

It slows the car down  it gose in the carb

Answer 2

A restrictor plate is bolted between the carburetor and intake manifold and restricts the amount of air in the air/fuel mixture before the mixture enters the combustion chambers. With less air in the mixture, horsepower is reduced. It is the opposite of forced air induction (turbo or blower)

Answer 3

It is a piece of metal that is square and it has four holes drilled in it.  It is about 4" X 4".  and it is about 1/4" thick

my dementions are close, but I'm not sure if they are exact

Here is a picture http://sports.espn.go.com/rpm/nascar/ico...

Answer 4

i believe it is a peice of metal

Answer 5

It is a  thin piece of metal with 4 holes in the center that is mounted between the carburetor  and the intake manifold.  They use it in Nascar to keep speeds down for safety reasons.

It limits the amount of air that enters the engine therefore reducing the amount of horsepower of the engine which in turn slows the car down.  Like  the governor in your car.