Nice program except it is Cubic inches...get Convert..greta little program:
Awesome free tool to have on the desktop,
(you ashould have alook for Desktop Dyno....that is impressive as well.)
The math to work it out Volumetric effiency is the actual Volume the unit pumps Divided by the theoretical volume it could pump.
It is considered to be the degree of the "inability to pump"
ie: if the engine pumps 80% of its total theoretical total..then it is missing %20 of its displacement per revoloution.
Im interested in this stuff as well....Especially Volumetric effiencys and the other math you can use to select blowers to give you yoru desiered Power.