Carburetors with vacuum lines are still found on classic vehicles and small-displacement engines — but what is the vacuum ...

One of the most difficult tuning problems to overcome is the seemingly ever-present engine vacuum leak. Vacuum is an important component of the internal-combustion process because it controls basic ...

If you've taken a trip through the pits at a major drag race lately, you may have noticed that many of the Pro Stock, Gasser, Modified Production and Super Stock cars have begun sprouting unfamiliar ...

Question: why is vacuum so important on a vehicle? Answer: Vacuum is created when each piston moves down the cylinder with the intake valve open. It will change as the engine is running at different ...

We may receive a commission on purchases made from links. No matter the type of car you drive, whether a diesel truck, a hybrid SUV, or a turbocharged sedan, a vacuum system is really important. The ...

If there is a classic bolt-on for a small-block Chevy, it has to be the aluminum intake manifold swap. This story is aimed at the first-time bolt-on artist, and we’ve chosen CHP’s My Generation ’87 ...

We've really been enjoying project C3 Triple-Ex, especially now that we've installed our 427ci "LS7 Killer" small-block, but we've recently encountered an issue common to street engines with ...

For any of those DIY auto veterans who’ve had to deal with a vacuum leak on older rides, we all join you in gratitude for engine control advancements that have pretty much made these diagnostic ...