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The section of a race car that begins at the base of the rear windshield and extends to the rear bumper. Contains the car's fuel cell and rear suspension components.
- Browse Related Terms: A-post, B-post, C-post, Cowl, Greenhouse, Quarter-panel, Rear clip, Spoiler, Window net
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A car in which the steering components are located behind the front axle.
- Browse Related Terms: Air Dam, Draft, Drafting, drag, Front steer, Panhard bar, Rear-steer, Slingshot, Sway bar
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The waving of the green flag after a caution period.
- Browse Related Terms: Adhesion, Bear grease, Binders, Brake caliper, Deck lid, Donuts, Esses, Factory, Flat-out, Happy Hour, Head wrench, Pole Position, restart, Scuffs, Silly Season, Sponsor, Stick, Trading paint, Wrench
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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 make the races safer (hopefully). It has the negative in that all the cars tend to run the same speed and they tend to bunch up causing massive wrecks in some cases.
A thin metal plate with four holes that restrict airflow from the carburetor into the engine. Used to reduce horsepower and keep speeds down. The restrictor plates are currently used at Daytona International Speedway and Talladega Superspeedway, the two biggest and fastest tracks in NASCAR.
- Browse Related Terms: Alternator, Carburetor, Compression Ratio, Fan, Front clip, Ignition, Oil pump, Piston, Restrictor plate
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The distance between the car's frame rails and the ground.
- Browse Related Terms: Chute, Cut tire, Intermediate track, Interval, Pit road, Ride height, Short Track, Superspeedway, Tri-oval, Victory Lane
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The steel tubing inside the race car's interior. Designed to protect the driver from impacts or rollovers, the roll cage must meet strict NASCAR safety guidelines and are inspected regularly.
- Browse Related Terms: Bodywork, chassis, Fabricator, Firewall, Frame, Roll cage, Roof flaps, Safety shield, Template
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A key safety feature in NASCAR race cars, the flaps are placed on the roof of the car and pop up when a car is running backwards to keep the car on the ground during wrecks. Prior to roof flaps being a required feature many cars would fly into the air when they spun backwards at high speeds, causing horrible wrecks.
- Browse Related Terms: Bodywork, chassis, Fabricator, Firewall, Frame, Roll cage, Roof flaps, Safety shield, Template
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Slang term for a way of making chassis adjustments utilizing the race car's springs. A wrench is inserted in a jack bolt attached to the springs, and is used to tighten or loosen the amount of play in the spring. This in turn can loosen or tighten the handling of a race car.
- Browse Related Terms: Aerodynamics, Air Pressure, Dirty air, Downforce, Equalized, Neutral, Push, Round, Setup, Tight, Track bar, Wedge, Wedge, round of
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Short for revolutions per minute, the measurement of the engine's crankshaft.
- Browse Related Terms: Cubic-inch displacement, Dyno, Gauge, Horsepower, P&G, RPM
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