I have a 2000 CX block with a 1998 EX intake manifold and head. My car seems to pull harder then before, but does not feel like it is running at full potentional.

Mods are: CAI, header, cat back, plugs, wires, fuel pressure reg/guage, and field vtec controller.

Can anybody please give me some tips on what I should run at?
I was thinking of setting VTEC to 5000 rpm, and once I borrow the fuel guage, I will adjust that too.

Any help will be appreciated.