Thought this was pretty cool, and an option for making educated guesses about what performance changes you could expect to see with whatever mod you were thinking of.

Anybody ever use one of these before?

http://www.proracingsim.com/desktopdyno.htm

For $50, seems like a bargain compared to guessing when you consider the price of most mods.

Also, any one know what it takes to dyno one of these motors?

That does look pretty cool if it actually works. Maybe 50hp will chime in.

i think it would be worth a try ive pissed away more then that on dumb crap
just my .02 worth

im not doing it right awa but maybe ill waste some money this spring or summer what the hell