Horsepower Lab 1D

Description of Horsepower Lab 1D program from Softdepia.com:

A software package for numerical simulation of gasdynamics phenomena in pipelined systems.
Horsepower Lab 1D makes specific emphasis on modeling piston engines gas-exchange based on prediction of wave action in engine ductings and can be used to help analyze tuned pipe design of piston engines.
Runs on Windows 95/98/ME/2000/XP/2003.

Horsepower Lab 1D is a "Free to try" program. You can download and try it for an evaluation period.