What is a restirckter plate they keep talking about in nascar?

Question

What is a restirckter plate they keep talking about in nascar?

Answer 1

basically what they said and the reason they keep talking about it in nascar is two-fold:

1) there are two restrictor plate racetracks in the cup series schedule (daytona and talledega).  restrictor plates were put into use after bill elliot ran the fastest lap ever at one of those tracks (over 212 mph) and after bobby allison had an accident where his car got airborne and nearly flew into the crowd.

2) "tapered" spacers have been introduced into the nationwide series to suck some of the power out of the engines, hopefully equalizing them and improving the racing overall.

watching a restrictor plate race is a totally different experience than any other as the cars all run along in two, three, or four wide packs, at nearly 200mph, inches from each other.

Answer 2

A Restrictor plate or air restrictor is a device installed at the intake of an engine to limit its power. This kind of system is occasionally used in road vehicles (e.g., motorcycles) for insurance purposes, but mainly in automobile racing, to limit top speed and thus increase safety, to provide equal level of competition, and to lower costs.

Answer 3

a plate with 4 small holes in it

boy all of a sudden a bunch brainheads show up

Answer 4

A Restrictor plate or air restrictor is a device installed at the intake of an engine to limit its power. This kind of system is occasionally used in road vehicles (e.g., motorcycles) for insurance purposes, but mainly in automobile racing, to limit top speed and thus increase safety, to provide equal level of competition, and to lower costs.

NASCAR's Sprint Cup and Nationwide Series currently uses restrictor plates at Daytona International Speedway and Talladega Superspeedway. NASCAR routinely states that the Sprint Cup restrictor plate reduces engine power from approximately 750 hp to approximately 430 hp.

The device limits the power output of the motor, hence slowing both the acceleration and the overall top speed obtainable on the tracks where the cars are so equipped. An undesired effect, however, is that all drivers tend to form very large "packs" of cars that run closely (there may only be one second separating the entire field at times) together for the majority of the race. These large packs reduce air resistance which allows the cars to run faster and makes drafting easier. These restrictions are supposedly in the interest of driver and fan safety, although many members of both of these groups feel that the closeness of cars and their inability to achieve separation may actually make the racing at these tracks more dangerous, as there are often massive and frightening multi-car pileups during races. Such a crash is dubbed "The Big One" by drivers and fans. At Daytona and Talladega, most races are marred by at least one occurrence of such a crash as cars rarely become separated. Talladega is considered the more likely track for these instances to occur as the track is wide enough to have three to four distinct lines of racing, compounding the chances of a mistake by a driver.

Reason for restrictor plates

There have been three reasons that NASCAR used restrictor plates in its history.

The first use came in 1971 as part of NASCAR's plans to reduce the size of engines from 427 cubic inches (7.0 L) to 358 cubic inches (5.8 L). In order to allow teams with smaller budgets to race the larger engines, NASCAR made mandatory the use of a restrictor plate to be placed on larger engines to equalize performance with smaller engines. The transition ended in 1974, when NASCAR banned the larger engines, and went to the 358 cubic inch engine (a compression limit would be implemented in 1996). This was a transitional process and, as not every car used restrictor plates, this is not what most fans call "restrictor plate racing."

The second use came following the terrifying crash of Bobby Allison at the 1987 Winston 500 at Talladega Superspeedway. Allison's Buick LeSabre blew a tire going into the tri-oval and flew tail-first into catch fencing early in the event, injuring spectators (although not actually entering into the grandstands). After a summer where the two subsequent superspeedway races were run with aids to prevent cars from flying, and smaller carburetors (390 cubic feet per minute instead of 750 cubic feet per minute) proved to be inadequate to sufficiently slow the cars, NASCAR imposed restrictor plates again, this time at the two fastest circuits, both superspeedways: Daytona for all NASCAR-sanctioned races and Talladega for Cup races. The Automobile Racing Club of America also enforced restrictor plates at their events at the two tracks. In 1992, when the Busch Series began racing at Talladega, the plates were implemented.

In some tracks, NASCAR's concerns with speeds because of power-to-weight ratios result in restrictor plates at other tracks. The Goody's Dash Series (known now as the ISCARS series with its new ownership) used restrictor plates at Bristol during at least the last years of the series' existence when the cars were using six-cylinder engines (compared to the traditional four cylinder engines), in addition to their Daytona races.

However, restrictor plates are not used for Craftsman Truck Series trucks. Rather, air intake, aerodynamic, and, eventually, a tapered carburetor spacer were implemented for those races. Combined with the aerodynamic disadvantage of the trucks, this allows NASCAR to avoid the use of such equipment for the trucks.

The third use came in 2000. Following fatal crashes of Adam Petty and Kenny Irwin, Jr. at the New Hampshire International Speedway during the May Busch Series and July Cup Series races, NASCAR adopted Modified rules featuring a one-inch (2.54 cm) restrictor plate to slow the cars headed towards the tight turns as part of a series of reforms to alleviate stuck throttle problems which were alleged to have caused both fatal crashes. For the Cup race, it was used just once at the 2000 Dura-Lube/Kmart 300, allowing Jeff Burton to dominate by leading all 300 laps in the ensuing race. Due to the lack of passing and the addition of an automatic kill switch in the case of a stuck throttle, the use of restrictor plates, intended as an emergency measure pending a more permanent replacement in any event, was discontinued at New Hampshire for the following race for Cup only. However, the Modifieds still use a restrictor plate, especially with the numerous deaths of star drivers in the history of the Whelen Modified Tour, yet no driver has died in the WMT at NHIS.

MY FINGERS HURT!

Answer 5

A flat plate that bolts  to the engine before the carburetor bolts on. The 4 air holes in the plate are smaller than the holes in the carburetor and limits (restricts) the amount of airflow the engine gets. This decreases the horsepower and slows the car down a little so the cars don't go so fast they fly up into the crowd.

Answer 6

What "Spinner" said. It was designed to keep real racing non-existent.

Answer 7

a restrictor plate track its a really fast track and , they put a restrictor plate, in the car, to avoid big wrecks, now the plate slows the cars , down, this leads to everyone running, at the same speeds, and now everyone wants to win so they draft, making the races really really unique

Answer 8

Man all fantastic answers why all the thumbs down??

Answer 9

Its a Plate that goes between the carb and the intake

to restric the Air and Fuel Follow

Better to see Pictures and see more read more Link....

http://benchracing.typepad.com/bench_rac...

How they work

http://sports.espn.go.com/rpm/news/story...

They come in different styles for different things But we are Talking Nascar here...

Answer 10

As per Wikipedia:::::

A Restrictor plate or air restrictor is a device installed at the intake of an engine to limit its power. This kind of system is occasionally used in road vehicles (e.g., motorcycles) for insurance purposes, but mainly in automobile racing, to limit top speed and thus increase safety, to provide equal level of competition, and to lower costs.

Some like it some don't.  Dale Jr. is the "king" of restrictor plate racing.  Well he likes them anyway. Doesn't seem to be winning any races though it what? Two years?

WOW.  DID I TICK PEOPLE OFF WITH THAT DALE JR. REMARK OR WHAT???  LOL

Answer 11

a resrictor plate is a thin piece of metal with four holes in it about the size of a quarter. it's placed over the carburetor to restrict the amount of air it can intake. it slows the car down. they use it at super speedways because if they didn't, the cars would have no limit to how fast they go. they could probably get up to 300 mph if they don't have one on. and that would be unsafe.