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kinda a loaded question but ill answer the best i can

bone stock and well maintained you can get a manal boost controler and turn the car up to 12-13psi safely --- im assuming you have an aftermarket boost gauge to monitor that


now the other part of the question

if you have the supporting mods: ie Fuel pump, injectors, SAFC or some kind of tunning device, Wideband to monitor Air Fuel Ratios --- -the list goes on and on of course -- just do some researching

if you have all of that then the magic number ive heard alot is in or around 20 psi

thats without touching the motor

hope this helps
 
It all depends on the mods. I think your looking for 1 of 2 questions. Either how much boost can you push stock or how much hp can the motor withstand. More importantly if you haven't already on a car that old you need to do your maintenance and supporting mods.

Here is the tech guide for your car.
Tech Guide: 1G 4G63t Upgrades - DSMtuners

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