Boosting an MK4
 

Hey so I had a quick question, with bpu parts on a 94 supra with stock tt's, 6speed, and stock intercooler, my question is, is 14,15 psi safe with the stock intercooler on 93 octane and what kind of hp will I be looking at with bpu mods at these boost levels thanks in advance!

How many miles are on your turbos? Have you done a compression test? If I can get your mileage and compression numbers, it'll be easier to give you a good answer to your question.

16psi is safe* with fresh 93 (r+m)/2 octane fuel with the oem ecu, but no more. 17psi+ will slowly but surely damage the engine and reduce compression.

*Disclaimer: Ymmv :)

It has 107,000 miles on it I'm not sure on compression but it drives great, was never beatin on it pulls very strong , no turbo smoking or anything like that. If you could give me just a ball park average until I get compression tested but what I'm mainly concerned about the psi my stock intercooler can take than how much hp I'm getting

Ballpark average for a bpu mkiv tt at 15 or 16psi is 350rwhp (= 412hp at the crank) or so.

The stock SMIC can easily take 15 or 16 psi. Although the end-tanks are plasic, you could hold them on with a metal tie-down strap if you had to (it's been tried and it works - but only necessary at 20psi+ on race fuel).