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The post extending from the roofline of a race car to the base of the rear window to the top of the deck lid.
- Browse Related Terms: A-post, B-post, C-post, Cowl, Greenhouse, Quarter-panel, Rear clip, Spoiler, Window net
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The amount a tire is tilted in or out from vertical. Described in degrees, either positive or negative.
- Browse Related Terms: 200 mph tape, Camber, Give-up, Handling, Heat cycle, High heat, Lapped traffic, Lead lap, Loading, Splash 'n' Go, Toe
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A rotating shaft within the engine that opens and closes the intake and exhaust valves in the engine.
- Browse Related Terms: Air filter, Axle, Bell housing, Bleeder valve, Blown motor, Bore, Camshaft, Crankcase, Crankshaft, Cylinder head, Engine block, Flywheel, Gasket, Gears, Harmonic balancer, Hauler
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A device connected directly to the gas pedal and mounted on top of the intake manifold that controls the air-fuel mixture going into the engine.
- Browse Related Terms: Alternator, Carburetor, Compression Ratio, Fan, Front clip, Ignition, Oil pump, Piston, Restrictor plate
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The steel structure of frame of the car.
The shell of the race car itself including the floorboard, interior and roll cage. The chassis is loosely based off of standard manufactured cars. NASCAR has rules that all chassis' must conform to in order to keep the races as even as possible.
- Browse Related Terms: Bodywork, chassis, Fabricator, Firewall, Frame, Roll cage, Roof flaps, Safety shield, Template
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A racetrack straightaway.
- Browse Related Terms: Chute, Cut tire, Intermediate track, Interval, Pit road, Ride height, Short Track, Superspeedway, Tri-oval, Victory Lane
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A formula or "recipe" of rubber composing a particular tire. Different tracks require different compounds. "Left-side" tires are considerably softer than "right-side" tires and it's against the rules to run left sides on the right. There are four basic components: rubber polymers, carbon blacks, oils and curatives.
- Browse Related Terms: Apron, Bias-ply, bite, Blister, Compound, Contact patch, Slick, Stagger, Stickers, Uniformity
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Amount that the air-fuel mixture is compressed as the piston reaches the top of the bore. The higher the compression, the more horsepower produced.
- Browse Related Terms: Alternator, Carburetor, Compression Ratio, Fan, Front clip, Ignition, Oil pump, Piston, Restrictor plate
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All > Recreation > Sports > NASCAR
The portion of the tire that makes contact with the racing surface. The size of each tire's contact patch changes as the car is driven.
- Browse Related Terms: Apron, Bias-ply, bite, Blister, Compound, Contact patch, Slick, Stagger, Stickers, Uniformity
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A removable metal scoop at the base of the windshield and rear of the hood that directs air into the air box.
- Browse Related Terms: A-post, B-post, C-post, Cowl, Greenhouse, Quarter-panel, Rear clip, Spoiler, Window net
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The area of the engine block that houses the crankshaft.
- Browse Related Terms: Air filter, Axle, Bell housing, Bleeder valve, Blown motor, Bore, Camshaft, Crankcase, Crankshaft, Cylinder head, Engine block, Flywheel, Gasket, Gears, Harmonic balancer, Hauler
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The rotating shaft within the engine that delivers the power from the pistons to the flywheel and from there to the transmission.
- Browse Related Terms: Air filter, Axle, Bell housing, Bleeder valve, Blown motor, Bore, Camshaft, Crankcase, Crankshaft, Cylinder head, Engine block, Flywheel, Gasket, Gears, Harmonic balancer, Hauler
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The size of the engine measured in cubic inches.
- Browse Related Terms: Cubic-inch displacement, Dyno, Gauge, Horsepower, P&G, RPM
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A slice or puncture of the tread or sidewall due to high-speed contact with debris on the racetrack or by contact with part of another race car.
- Browse Related Terms: Chute, Cut tire, Intermediate track, Interval, Pit road, Ride height, Short Track, Superspeedway, Tri-oval, Victory Lane
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Made of aluminum, it is bolted to the top of each side of the engine block. Cylinder heads hold the valves and spark plugs. Passages through the heads make up the intake and exhaust ports.
- Browse Related Terms: Air filter, Axle, Bell housing, Bleeder valve, Blown motor, Bore, Camshaft, Crankcase, Crankshaft, Cylinder head, Engine block, Flywheel, Gasket, Gears, Harmonic balancer, Hauler