I'm looking for some software that will help me make some decisions on the coming mod fest. I've looked at DynoSim (free demo) and Desktop dyno 2000 version 3.10. Neither quite offers all of the options I need. I'm looking for something that allows me to enter both the Seat-to-seat duration and the .050 duration in order for the program to determine the exact ramp rate. Also, I'd like to be able to enter the combustion chamber volume. Neither of the above software packages allows me to do both of these items.

Any help would be appreciated.

Michael