Engine Performance Quiz
by Staff
Can you tell the difference between a camshaft and a stick shift? You will once you take the engine performance quiz. See if you know what makes your car get up and go.

Bolt-on accessories that make it easier for your engine to push exhaust gases out of the cylinders are called:

  • headers
  • footers
  • mufflers

If you're using an exhaust header with a four-cylinder engine, how many exhaust pipes will you have?

  • one
  • two
  • four

Why do properly inflated tires improve fuel efficiency?

  • they decrease the force of friction
  • they counteract the force of gravity
  • they're lighter

During the exhaust stroke, many engines lose power through:

  • exhaust manifolds
  • back pressure
  • exhaust headers

Nitrous oxide improves engine performance by providing more what?

  • nitrogen
  • oxygen
  • hydrogen

What other benefits does nitrous oxide provide?

  • a cleaner-burning fuel
  • a cooling effect
  • a quieter performance

Why do cars normally carry only a few minutes worth of nitrous oxide?

  • it's difficult to find
  • it's expensive
  • it's fairly bulky

How much faster can the turbine in a turbocharger spin when compared to a regular car engine?

  • 10 times faster
  • 20 times faster
  • 30 times faster

How many valves per cylinder do dual overhead camshafts typically have?

  • just two
  • at least four
  • six or more

Three fundamental causes can keep your engine from running. Which of the following is not one of them?

  • bad fuel
  • lack of compression
  • worn-out ball bearings

Which of the following is considered an improvement in engine performance?

  • better fuel economy
  • louder exhaust sounds
  • more impressive revving noises

What does the engine need to go faster?

  • more nitrous oxide and a better turbocharger
  • less air and more fuel
  • more air and more fuel

How much power does a supercharger add?

  • 25 percent more
  • 50 percent more
  • 200 more horsepower

How fast does a supercharger spin on its own?

  • 25,000 rpm
  • 50,000 rpm
  • 150,000 rpm

Which of the following projects can be a DIY job for a beginner?

  • installing a supercharger
  • machining the valves
  • performing a drivetrain swap

How does an air filter improve performance?

  • It heats the air.
  • It adds special chemicals to the air.
  • It improves air flow.

Which of the following aftermarket performance parts are designed to be washable and reusable?

  • bearings
  • air filters
  • nitrous injectors

How does a cold air intake kit improve performance?

  • It improves the air-fuel mixture.
  • It helps the engine spin faster.
  • It takes pressure off the radiator.

Which of the following projects is the easiest?

  • installing a turbocharger
  • installing a hood scoop
  • installing a performance chip

What does a performance chip do?

  • adds more memory to the car’s computer
  • helps the engine run without as much gas
  • alters the engine programming in the car’s computer

What’s a free way to improve a car’s performance?

  • take out the headliner and interior door panels to save weight
  • make a spoiler out of junkyard scraps
  • trade your car for someone else’s

Which of the following parts are easy to swap for lighter-weight alternatives?

  • subframe
  • transmission
  • wheels

Which of the following statements is true?

  • Glass windows are lighter than acrylic windows.
  • Disc brakes are lighter than drum brakes.
  • Original body panels are lighter than carbon fiber body panels.

What is drive line lash?

  • hitting the gas so hard that the driveshaft cracks
  • hitting the gas so hard that your head snaps back
  • wasted torque from natural engine movement

How can drive line lash be improved?

  • Install firmer motor mounts.
  • Install softer motor mounts.
  • Install racing harnesses.

How much horsepower does a cold air intake add?

  • 10 percent
  • 25 to 50 horsepower
  • 5 to 7 horsepower

How does a cat-back exhaust improve performance?

  • The pipes are curved.
  • The pipes are straighter.
  • The pipes are insulated with cat fur.

One car part is notable for its strict environmental regulations, meaning that it’s illegal to replace it unless it’s broken. Which part?

  • the tires
  • the catalytic converter

True or false: an engine flush is recommended to improve performance.

  • false, always
  • true, always
  • true, in older cars

What might cause a car to run at less-than-factory performance?

  • a buildup of crud on the engine
  • a radio that was removed to save weight
  • the perfect mix of air and fuel