How reliable is Desktop Dyno?

1967DartGT said

I've heard that the desktop dyno programs can be very accurate if you know your head flow numbers. However the other wildcard seems to be choosing the correct intake manifold and trying to determine which of the flow categories it really belongs. I never know which to enter for the Air Gap - but have assumed dual plane high flow.

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This is exactly the problem I have with the program,when comparing real world dyno numbers the air gap is only slightly behind a good flowing single plane in h.p. and thats only on the upper end.Yet in the the program when you compare a dual plane high flow to a std single plane its so far off its rediculous-let alone a high flow single plane.They need to update and have actual intake selctions similar to their cam programs.