I've been using the search function over an hour now using various words like software and desktop dyno without luck.

I am looking for a free or inexpensive dyno software. I want to evaluate different cam options on my Small Chevy with carb. Basically I want to be able to modify the cam specs, and see the (computer based) results.

Suggestions? I did not find any links, only a few sofware suggestions for $80+.