how much Psi does a stock turbo in a Mkiii supra push, and how far can i turn up the psi on my turbo without messing with the internals?

I was told 7-8 PSI.... and i dont think you can boost it up without tuning your internals...

the ct-26 will hold 16 lbs. but that is pushing i wouldn't do it with out having the fuel there though, 12 lbs is on the safer side but it wears on them.