I have it and use if often.
If you use basically unmodified parts, just as they come out of the box, the Desktop Dyno 2000 program is pretty close up to about 500 horse power.
After 500 horse power, tuning plays such a large part in horse power output that the program can't take into account all of the variables, and just assumes you know how to '**** tune' the engine.
Under 500 horsepower we find it to generally be with in 5 to 10%
We use it a lot to change around cam specs.
The 2000 version lets you enter any cam specs you want, so we enter all of the manufacturers specs, and we can change cams in a few clicks...
It's usually pretty close to what we actually get on the dyno...
Usually the program is a little conservative. I don't know if we just get more out of an engine than the normal Joe would, or they stayed conservative just to be cautious.
We may just know enough little tricks to get 'A little more' than most people...
Who is to say...
I haven't committed a crime. What I did was fail to comply with the law...