Just a thought... Check the pink line that connects to the stock diverter valve. Whoever told you that you dont have a leak because your boost guage read in vaccum is wrong. My car, until very recently (thanks D and Luke) had huge boost leaks, and still read in vaccum and in boost.

I do know that if you did not zip tie your pink line to the stock DV, then it probably blew off. I blew mine off at 17 lbs, so at 20+ I can almost certainly say that this one blew off.

Another thing, as was said before, the stock turbo runs out of efficiency at about 19-20 lbs. It also will start to run too lean, becaue there's not enough fuel... espicially at 20lbs at redline. This is VERY bad for you car. The map sensor will pull timing, but you might as well kiss your turbo goodbye. YOu dont want to be pushing (on Stage 0, which I can only assume you are) anymore than about 17-18 psi in 3rd and 4th gear, or you'll get spark cut, which is no fun.

One thing I am wondering is if you have a CEL yet. If you were pushing that much boost, then you most certainly have a P023 code or whatever the hell the other overboost code is. If you do not, then you might want to check your boost guage. It's a common problem with the SRT's, actually. Your boost guage should read 0 when the car is off. If it does not, then the guage is bad. Check these things first, and if you have any problems, I'd be more than happy to help you out with whatever I can if you're ever on my side of town. Good luck.