When are the bolt-ons too much?

[bias]

Ok I have stock engine and turbo but a modded Ecu. I'm not sure of what it is set for but it runs on the stock engine set-up. The boost hits about .5 bar on the norm but if I kill, it it goes up to .9 bar. I have a front mount, apexi air filter, and 3" tanabe exhaust. The car was running good with stock exhaust but when I put on the 3" "Oh God" what a difference. Now it seems like when I'm just cruising through the gears (4rpm max) it feels like it's losing power. I'm thinking it may be doing the same thing at higher rpm but I just can't tell. With adding all these mods could the stock set-up be maxed out and just not know what's going on anymore? I know the stock turbo is crap but how does a car feel when something is getting maxed out? Be it the turbo,fuel pump, injectors or maf? I hsve been checking codes but only getting 55?

[ch187]

what the ecu modded for?

[bias]

Nt sure all? All it has on it is b-up and a sequential sticker? It runs on all the stock parts.

[ch187]

well then its probably tuned for higher boost. your good at 9 10 probably even up to 11 but i wouldnt push that turbo too far. fp is fine, maf fine, injectors fine. code 55 is mean everythings good.