How are you tuning the car? What size injectors?

If you want help, start by updating your vehicle profile with a coherent and complete mod list. If what's currently listed in your profile is accurate, that's you problem.

its on stock injectors I did update myprofile idk why it don't show it

You won't see gains throwing parts on. You need a way of tuning

cuz I used two have a 90 gst stock with a 20g external westgate and fmic and it was a beast I just recently picked up the gsx what would you recommend I have a set of 650 injectors that were in the glove compartment when I got it ??? should I check for boost leaks I also noticed when am on 3 gear and it goes a lil over 10psi feels like the clutch starts two slip

You are likely getting worse performance as you have no supporting mods for a 70 trim turbo. You will get more "pull" when you put the 14b back on as you are seriously lacking in fuel and tuning support. I would not turn up the boost up any more as you won't be daily driving the car very long. You really need to do some homework before just throwing parts at it.

thx so would it be safe if I take the 70 trim off and trow on a 16g turbo?

If you plan on buying one, I would get a used 14b and a wideband instead of a 16g.

first the ebay parts are no good dont buy any more for the price of a new ebay part you can just buy a used genuine part off of here and it will last way longer than a new egay also you need to do your homework man these cars have a bad rep because of what your doing with it right now trying to go fast with no supporting mods think about it this way if you build a house and decide you want to build it using toothpicks vs 2x4s how well is it going to work it might for a few days or so but then bam! same thing is going to happen to that car if you keep it up

the first mod that should be done to these cars after and i repeat after all the maintenance is done would be a way to tune the car with proper logging equipment all at the same time install them as one mod this means tunner (safc, aem, ecmlink, ect...) then wideband, boost gauge, and a oil pressure gauge (not needed but is forsure nice to know for peice of mind)

after you get all of that you are set to add fuel so fuel pump and injectors then after you do that depending how big you go with this your pretty much limitless other than what you have to spend it dont take much to make these cars very fast now i hope you take all of our advice in this thread and enjoy your car

oh and if you havent get a boost leak tester get one and use it