You'll be the first one with a p1sc break 550 I have ever heard of on 2v. I have heard of 42lb injectors but not 46. Plus 42's at least start getting to their limits a little over 500.
This one is from modular powerhouse with quite the mod list with an over sized crank pulley and a tiny SC pulley. 498/510tq good TQ because it's having the piss spun out of it.
498/510TQ....p1sc - MPH Forums
The best I have ever seen from a P1SC is like 505. The P1SC is just not a strong blower. If you made 550-600 I would question the accuracy of the dyno. You'd have to back them up with good traps at the track to make them believable.
If some one knows a 2v that's breaking 525 with P1SC and they are backing them up with good traps, I'd like to see it?