Virtual engine has a lot of features that might be kinda fun - for a few minutes. Do you really want a 3d picture of the engine you're planning on building? Do you plan on working with sport compact engines? In other words, do you plan on really using all of that bundle?
I use Desk Top Dyno:
ProRacing Sim Individual Simulation Pacakges The cost is a little bit more than the package you quoted, $50. But you're getting ONLY the dyno software. If one restaurant sells one hamburger for $8, and another sells 4 burgers for $8, how good would you expect the $2 burger to be, compared to the $8 burger?
This program has been around for many years, and is frequently updated. No computer simulation is ever going to be dead accurate. There are too many variables in manufacturing, assembly, and tuning. But DTD has a good reputation for being pretty close.
The purpose of a good simulation is to allow you to plug in a variety of specs, and see what happens with various changes. Compare one cam against another, change cam timing, change compression, change head specs, etc. It can be very educational - and a real time waster, too.
