I installed a boost control valve a few days ago and finally used the car to go to work this morning and holy crap I had 20 pounds of boost. I fear that is to much for a little 14g so after work I turned it down a little and now I'm at 14 pounds of boost, I think thats a little safer
Don't be so swift to bash people. I'm surprised it didn't hit fuel cut if you went up near 20psi with that turbo. Unless you have a 1G mass air sensor, it's not good to go to 20, but with one, you can go that high. I'd make sure you have enough fuel with a wideband or dyno run.
it is better now, everything is primarily stock under hood to the best of my knowledge. I usually don't go that high into boost anyway I usually stay around 7 to 8 when i accelerate. I don't like to beat on it