How Accurate is Camquest?

I have both Desktop Dyno and Camquest. Camquest is a little more optimistic than Desktop Dyno but their close if you put in all the variables exactly the same. That's the trick. You said your heads were fully ported. What does that mean in terms of flow numbers? As for my heads that I fully ported and polished as an amateur flow 252 cfm peak at .550 lift on the intake side. Experienced head techs can get allot more out of the same head because they know exactly what to do which I didn't. So if you just choose fully ported in their head directory you can easily come up with a bunch more hp than your engine is really making. Same goes for the compression ratio. If you don't' know EXACTLY that can affect the outcome. One half point can make 10 hp difference.

In other words Camquest is like most other computer programs. It's only as good as the information that was input to it.