I have been reading this topic fairly closely, and I thought I would finally put my in. I really don't think weather conditions get factored in by people with their cars. I recall dynoing a few engines that make 30 -40hp less in the room, as compared to the std/corrected figures. As the end of the day, a dyno is a tool, and a std has to be followed, otherwise there will be no consistancy. If you start off with 550hp, and finish up with 595hp, you know you have made an extra 45hp. Jesse's W5 engine is a good example, it showed 640plus on the dyno, and shows 630hp on the Moroso calculator. At the end of the day though, it all comes down to how it runs down the track, leave the Dyno figures and flow numbers to the guy in his local bar, or at the track, who has nothing better to brag about. AL...
in. I really don't think weather conditions get factored in by people with their cars. I recall dynoing a few engines that make 30 -40hp less in the room, as compared to the std/corrected figures. As the end of the day, a dyno is a tool, and a std has to be followed, otherwise there will be no consistancy. If you start off with 550hp, and finish up with 595hp, you know you have made an extra 45hp. 
