Get a tune from Tom (1TurboFocus with Focus-Power). He can tune and real time monitor. Get the F.I. tune and you will be set for life basically. Any mod you add he will connect back up with you and re tune. Do that and then just go to a dyno to do a few runs to know what your power is.
2001 ZX3 2.0L Zetec-
Hatch Nation #42
Going through Rebuild See "The TICK Build Thread" for details (http://www.focusfanatics.com/forum/showthread.php?t=289168&referrerid=62897)