[spoiler][/spoiler]Why flow numbers mean as much as dyno numbers. Most high end head porters care way more about cross section and port CC than a flow number. Its usually the customers pushing for that number because they read it on the interwebs.

A dyno is just a tool. I now guys that will wear there junk out on the dyno and just toss it in the car and expect a miracle to occur. Been pretty rare that a great tune on the dyno was what the car wanted on the track.

As for Hardcores engine on an honest dyno I would say its a 700ish HP piece. But it was also not in the car long enough to be fully sorted out. But MPH tells the tale whether ET does or not. But that same engine on other dynos could make 800, its a tool not a be all end all.