Carburetors with vacuum lines are still found on classic vehicles and small-displacement engines — but what is the vacuum actually used for? Let's take a look.

Right up there with "What cam should I run?" is one of the most asked questions to ever come up at any bench racing session. "Which carburetor should I use?" Today there are way too many choices to ...

Ah yes, the carburetor. A humble device that mechanically mixes fuel and air, which gets sucked down the intake manifold and into the cylinders to feed the internal combustion process. The carburetor, ...