Like HowStuffWorks on Facebook!

Auto | Under the Hood | Engine Performance

In the Engine Performance section, learn about horsepower, carburetors, the difference between turbochargers and superchargers and even how nitrous oxide boosts engine performance.

Featured
How Fuel Injection Systems Work

As concerns about vehicle emissions and fuel efficiency have grown, fuel injection systems have risen to the forefront of auto technology. Trying to keep up with new environmental laws, carmakers began installing these systems in all new models.


Quiz: What has more horsepower?

Quiz: What has more horsepower?

The mission of this quiz is simple: to put vehicles head to head to see which has more horsepower. Give this quiz at HowStuffWorks your best shot. See more »

Will new motor mounts increase engine response?

Will new motor mounts increase engine response?

Is it possible for something as simple as new motor mounts to increase engine response in your car or truck? Find out at HowStuffWorks. See more »

How does engine placement affect handling?

How does engine placement affect handling?

There's a lot of talk about how engine placement affects handling; but does engine placement really matter all that much? Find out at HowStuffWorks. See more »

Do exhaust cutouts increase horsepower?

Do exhaust cutouts increase horsepower?

Adding an exhaust cutout is a simple way to free-up some additional horsepower in your car or truck. Learn more at HowStuffWorks. See more »

How much horsepower does a cold air intake add?

How much horsepower does a cold air intake add?

How much horsepower can you really expect to gain by adding a cold air intake? Find out at HowStuffWorks. See more »

How much horsepower does a performance muffler add?

How much horsepower does a performance muffler add?

Will replacing your car's stock muffler with a performance muffler actually increase horsepower? Find out at HowStuffWorks. See more »

5 Cheap Ways to Increase Horsepower

5 Cheap Ways to Increase Horsepower

If you're searching for a few cheap ways to increase your car's horsepower, we have just what you're looking for. Learn more at HowStuffWorks. See more »

How much horsepower does a supercharger add?

How much horsepower does a supercharger add?

How much horsepower does a supercharger add? Learn more about superchargers and engine performance at HowStuffWorks. See more »

Does a dual exhaust system improve your car's performance?

Does a dual exhaust system improve your car's performance?

Does a dual exhaust system really improve your car's performance? Find the answer at HowStuffWorks.com. See more »

How much horsepower is enough?

How much horsepower is enough?

How much horsepower is enough? Keep reading to learn about horsepower and car engines. See more »