1. Air splitter
   Deck-lid wing
2. Engine

You've got it. The stock car is an engineering achievement, but the most engineered part of a stock car is the engine. It's a design achievement that no one car deny.

1. Engine
   Aerodynamics
2. Suspension

What all NASCAR folks know for certain is that the engine is the heart and soul of a good race car. Aerodynamics and suspension are important as well, but it's the engine that wins races.

1. Autopsy
   Teardown
2. Rebuild

At the end of each NASCAR race, a car goes through a teardown, or dismantling. They sometimes totally disassemble the engine in order to inspect it.

1. Using its full power
   An exploding engine
2. A damaged engine

"Blowing an engine" refers to damaging an engine part enough to make it useless for the rest of the race. This kind of damage can be minor or it can be severe, as in cracking the engine block.

1. Cast iron
   Reinforced steel
2. Exotic metal alloys
   All of the above

A stock car engine can be made from all the above materials. It represents the very finest in engine technology.

1. Heat
   Pressure
2. Miles
   All of the above

Extreme heat, pressure and miles are what damage the stock car engine. Many racetrack designs also lead to engine volatility and failure.

1. Daytona
   Pocono
2. Springfield​

Pocono is considered one of the most difficult raceways in the world, due to its tri-oval-shape. Pocono Raceway is located in Long Pond, PA.

1. Pace cars
   Restrictor plates
2. Fines and fees

Restrictor plates were introduced to slow down speeds. Due to the incredible speeds that these engines can reach, it can be unsafe for both the driver and the audience.

1. Air
   Fuel
2. Both

Restrictor plates reduce the amount of air and fuel that can go into the engine. They're made of aluminum, and they have four holes which create the restriction.

1. Next Generation
   Combustion
2. MAHLE

The MAHLE Engine Builder Showdown features two-person teams that build Ford Sprint Cup engines. The faster one to do it wins the contest. You need to watch this on television, by the way.

1. NASCAR
   Formula One
2. Speed Deck

NASCAR is the main governing body for stock car racing in the U.S. Engines used in NASCAR are considered to be some of the best in the world.

1. Coups
   Sedans
2. Muscle cars

Stock cars are basically late-model sedans. They're designed to be far superior in speed and power than any other machine you'll find on the road.

1. 100 mph
   150 mph
2. 200 mph

Stock car engines allow race cars to reach speeds over 200 mph. Restrictor plates are used at Talladega and Daytona Speedways.

1. 1
   2
2. 3

NASCAR runs three national series. These are the Monster Energy NASCAR Cup Series, the XFINITY Series, and the Camping World Truck Series.

1. White
   Green
2. Blue

A green flag initiate a NASCAR race, while yellow signifies that there is debris on the track or that an accident has occurred. White means that there is one lap remaining in the race.

1. Double HEMI
   Pro Stock
2. V12

The Pro Stock engine is the powerful monster behind drag racing cars. They are capable of producing intense power and speed.

1. Large
2. Small

Bigger is always better when it comes to a Pro Stock engine. These engines are capable of 1,500 horsepower and 12,000 rpm.

1. V-6
   V-8
2. V-12

NASCAR engines are V-8 engines. To be exact, they're cast Iron 358 cubic inch (max) V-8 with aluminum cylinder heads.

1. 450
   650
2. 850

A typical NASCAR Sprint Cup engine boasts of 850 horsepower at 9,000 rpm. They also have 550 feet per pound of torque.

1. 30%
   60%
2. 90%

Stock car V-8s are set at 90%. This is not dissimilar to normal cars that drive on American roads.

1. Plane
   Boat
2. Street-car

Stock car engines began as modified versions of street engines. Today, you'll find custom-made 850-hp 358-cubic-inch thoroughbreds.

1. Carburetors
   Pushrods
2. Both

NASCAR engines are required to use pushrods, but no longer carburetors. They also need two valves per cylinder and a wedge-shaped combustion chamber.

1. 3
   8
2. 5
   12

The NASCAR flagman communicates with racers by waving any of eight flags, an needed. The eight flags are green, yellow, red, black, black with a diagonal white stripe, blue with a diagonal yellow stripe, white, and checkered.

1. High
2. Low

Race cars need to run at high rpm. This produces maximum power for a short time.

1. Yes
2. No

In truth, stock car engines are better than normal engines because they have an unlimited budget! They also don't have to worry about fuel economy and emissions.

1. Wedge
   Disk
2. Oval

Stock cars use a wedge combustion chamber with intake and exhaust aligned in the same place. This is actually an older model of engine.

1. Cams
   Pits
2. Rolls

Single long pushrods aren't ideal for performance, race cars use cams to shorten the length of these pushrods. They're mounted high in the block of the engine.

1. Diamond-like carbon
   Titanium nitride
2. Both

The materials that coat the components of the engine are highly important. Since a stock car engine gets so stressed, the parts and pieces must be protected.

1. Roller tips
   Cylinders
2. Groove pouches

Roller tips are usually used to protect the cam lobes from friction. These are not allowed in NASCAR vehicles, and therefore car builders rely on surface coating.

1. Good
2. Bad

Carburetors​ have always been good for racing engines, although NASCAR no longer allows them. They're known for their efficiency and durability.

1. Lightweight
2. Heavy

The block of a stock engine is designed with lightness in mind. Unfortunately, this affects long-distance durability.

1. High
2. Low

Stock cars are designed with the camshaft sitting high on the V. This shortens the length of the pushrods and leaves more room around the crankshaft for air to flow freely.

1. Aluminum​
   Iron
2. Wood

Stock car engines are built with iron blocks. This is actually graphite iron. Standard engines are built with aluminum blocks.

1. Free flow
   Dry sump
2. Wet box

Stock cars use a dry sump system in order to collect oil. This system catches the oil as soon as it reaches the crankcase. It's then sucked out of the engine by pumps and sent to the oil tank.

1. Crankcase
   Cylinders
2. Carborator

Stock cars keep oil in an external tank in order to free up the crankcase. In other words, the crankcase can move through clean air, boosting power by as much as 10 to 20 horsepower​.