At this point, I am starting to question the maddad whisper exhaust. I believe it tapers to 2.5" at the tail pipe even though it is 3" everywhere else. Would this rob that much power? The tuner told me that it really didn't pick up that much power going from 22psi to 24psi boost. He said he felt that the car had a restriction somewhere.
From what I hear, PIA has a stingy Mustang dyno, but I really thought I would have had enough here to put down 400whp.
The local track opens for test and tune April 13th, I'm planning on going and running a couple passes to get my trap speeds.
Thanks for your replies, I appreciate the input.