How Much Do You Know About Stock Car Engines?


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About This Quiz

They're the fastest, most awesome cars on the planet, but do you know​ the inner workings of a stock car? This is the ultimate quiz for gearheads that have a need for speed.

What is the most engineered part of a stock car?

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.

The ___ is the heart of a race car.

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.

What happens after a car wins a NASCAR race?

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.

What is "blowing an 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.

A stock car engine is made of what?

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

What damages a stock car engine?

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

Which of these is a difficult raceway?

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.

To slow speeds down, what did NASCAR introduce?

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.

Restrictor plates reduce the _____ that can go into the engine.

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.

What is the famous stock car engine building contest?

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.

What is the main governing body for stock car racing in the U.S.?

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.

Stock cars are late model ______.

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.

A stock car engine can reach speeds exceeding ______.

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

How many national series does NASCAR run?

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

What color flag initiates a NASCAR race?

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.

What kind of engine is used for drag-racing cars?

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

Pro Stock engines are ________.

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

NASCAR vehicles use ______ engines.

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

How much horsepower does the NASCAR Sprint Cup engine have?

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

Stock car V-8s are set at what percentage?

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

Stock car engines began as modified versions of _____ engines.

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

NASCAR engines must use what?

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

How many different flags does a NASCAR flagman manage?

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.

Race cars run at _____ rpm.

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

Are stock engines better than street-car engines?

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.

What kind of combustion chamber is on a stock engine?

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

How do race engines shorten the length of their pushrods?

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.

Which surface coating protects the highly stressed components of the engine?

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.

What protects the cam lobes in normal cars?

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.

Carburetors have traditionally been ______ for racing engines.

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

The engine block of a stock car is _____.

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

The camshaft sits ______ in the valley of the V.

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.

Stock car blocks are made from _____.

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

In terms of oil, stock cars use a ______ system.

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.

Keeping oil in an external tank frees up which part?

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​.

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