Indeed, there are some very real benefits to be gained from using natural engine vacuums (in either the intake manifold or the header collectors) to evacuate the crankcase, but unfortunately, many ...

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 ...

The volumetric efficiency table is crucial for understanding ECU performance. The vertical axis represents engine load ...