cmx2k

Hi there, i'm from Sweden and i'm new here so sorry if I post this wrong.

I have an 1999 Audi A4 stationwagon, 1,8Tq with an AEB engine.

I have a k04 turbo, highflow manifoil, 3'' downpipe with no cat, 3'' exhaust and a front mounted intercooler.
I have a k03 chip now, does not go very well, the car works great, no faults, but the chip is bad, not much power with a k03 or a k04.

I'm going to get a new chip for the k04 turbo from a tuning company here in Sweden soon, and I was told to use the stock injectors with that chip, how much can the stock injectors handle?
They clames about 230-240hp out if it, how much boost is safe to run with the k04 turbo? How much can it handle with my engine package?

I have seen some k04 cars boost up to about 1.5bar, or 21.7 PSI.

Thanks for any answers.