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'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 ...

There's no end to the theories regarding carburetion, performance, and fuel efficiency. Just about everyone has a belief they stand by when it comes to carburetors. Fatten the mixture. Lean the ...