The software does complete cycle simulation of the whole internal combustion process including the gasdynamics in the pipes/ducts, ports and plenums (air boxes, boost bottles, exhaust boxes etc.) using the GPB-method for pipe flows.
It has successfully been used to simulate a range of engines from small glow plug engines to kart and motorcycle competition engines, to Formula 1 V6 powerboat engines, to boxer layout micro light engines etc.