[DOC] [TLE] Restrictor plate - Wikipedia [PAR] 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 to provide equal level of competition, and to lower ... NASCAR's Sprint 
Cup and Xfinity Series have used restrictor plates at... [DOC] [TLE] Horsepower reduction among 2015 rules package ... - NASCAR.com [PAR] Sep 23, 2014 ... CONCORD, N.C. -- A reduction in horsepower, a shorter rear spoiler and an ... 
format unveiled this year could see some minor tweaks going forward. ... in part 
through the use of tapered spacers, which are currently used in the ... 
Stefanyshyn said speeds will likely decrease by no more than 3-4 mph in most... [DOC] [TLE] Twenty NASCAR terms you need to know | NASCAR.com [PAR] Aug 13, 2015 ... Restrictor plate: A thin metal plate with four holes that ... [DOC] [TLE] Plate change serves up slower speeds for Daytona ... - NASCAR.com [PAR] Feb 16, 2011 ... In its continuing quest to reduce the speeds of Sprint Cup cars this week at ... felt 
was coming -- ordering the use of a carburetor restrictor plate with a smaller 
opening. ... by about 10 horsepower and that officials hoped would reduce the ... 
is the difference in how teams approach a race versus practice. [DOC] [TLE] Glossary of Racing Terms | NASCAR Home Tracks [PAR] Aug 17, 2010 ... Bleeder valve: A valve in the wheel used to reduce air pressure in tires. ... The 
higher the compression, the more horsepower produced. ... due to high speed 
contact with debris on the race track or by contact with part of another race car. ... 
Firewall: A solid metal plate that separates the engine compartment... [DOC] [TLE] R - Ford Performance [PAR] The plate, used exclusively in NASCAR racing is designed to reduce the flow of 
air ... engine's combustion chamber, thereby decreasing horsepower and speed. [DOC] [TLE] NASCAR: Glossary of Terms and Definitions - Ducksters [PAR] Kids learn the basic terms and glossary for NASCAR and racing. Types of tracks, 
cars, and settings. ... Restrictor Plate - An aluminum plate designed to reduce the 
flow of air and fuel into the engine's combustion chamber. This decreases the 
horsepower and speed of the car and is used on certain NASCAR race tracks to... [DOC] [TLE] Jayski's NASCAR Silly Season Site - Restrictor Plate Chart [PAR] NASCAR shrinks restrictor plates at Talladega: NASCAR will reduce the size of 
the ... the hole teams used during the spring race, creating 75 to 80% more 
horsepower. .... To compensate for the increase in power and speed, the rear 
spoiler, which ... Some Daytona 500 stuff: According to Winston Cup Director, 
John Darby... [DOC] [TLE] Restrictor Plates - How NASCAR Safety Works | HowStuffWorks [PAR] Restrictor Plates - A restrictor plate slows a car down by reducing the amount of 
air ... are placed between the carburetor and the intake manifold to reduce the 
flow of ... the engine's combustion chamber, thus reducing horsepower and 
speed. ... Some believe that if restrictor plates weren't used, NASCAR cars could 
race on... [DOC] [TLE] NASCAR - Sprint Cup, Nationwide Series, Truck Series - CBSSports ... [PAR] Find the latest NASCAR news, race results, schedules and standings for Sprint ... 
Bleeder valve: A valve in the wheel used to reduce air pressure in tires. ... 
especially at higher speeds, because the car needs less horsepower to move ... 
Firewall: A solid metal plate that separates the engine compartment from the 
driver's... [DOC] [TLE] Eliminating Restrictor Plates?  Building Speed [PAR] Oct 5, 2012 ... Every return to a restrictor plate track brings suggestions about how we might ... 
curve above, it's evident that the engine is designed to run at its peak horsepower
. ... Note that NASCAR cars are not allowed to use any gear that increase the ... If 
you forced a NASCAR engine to race at 3500-4500 rpm, the car... [DOC] [TLE] Here's some help to

Question: Some NASCAR races use this kind of "plate" designed to decrease horsepower & speed
Answer: a restrictor plate