There are several ways to improve volumetric efficiency, but a system wide approach must be used to fully realize potential.

In other words, if the flow out of a 100cc pump is 92cc (per revolution), then the volumetric efficiency is 92%.

When a single number is given for volumetric efficiency, it will typically be at the rated pressure and speed.

The engineering terminology for these benefits is greater volumetric efficiency.

High volumetric efficiency due to very large port openings.

In other words, the so-called "volumetric efficiency" of the capacitor is increased.

This design allowed for high volumetric efficiency at high engine speed.

From 1970 to 2005, volumetric efficiencies have improved dramatically.

This results in improved volumetric efficiency and helps to generate higher power output.

Additionally, a lack of dead space gives an increased volumetric efficiency.