I have a 98 WRX. Currently I only have a external fuel pump in the car and am running around 1.1-1.2 bar boost

Can you let me know what the safe amount of boost is to run constantly. I have peaked at even 1.3 sometimes but it always comes within the 1.1 and 1.2 range.

My question is on standard internals, how much boost can i run safely at a constant amount.

I'm using an AVCR to control the boost.

Thanks in advance