[CSX 4027]

Desk top dyno should be used as a very basic baseline for changes that would post the same results from common sense without the software. It is more entertaining than anything else. You could also go to a Fortune teller and find some things to fit your situation. Does that mean the persion can really be psychic?
Or just a good guesser based on other common results?
It can't possibly take into considerational the infinitismal variations that could possibly take place in an engine.
Best Bet..Get a good engine builder or learn to build them yourself.