Whats going on now.......

Well, When I'm driving my car and I 'm in 2-5 gear around 3-4000 rpms and I floor it, I hear the turbo spooling but It seems like my car isn't moving really that much faster at all, and the rpms go up slow as heck. The boost gauge goes up to about 15psi and after 5000rpms it dropss to about 10psi. Whats going on???

well from what 95 GSXracer said, the stock t25 does this (boost drops like you're explaining)...how old is your turbo? hell you could do what i did and fuckin rip apart everything and clean every single thing, especially pipes and shit. get all of that damn oil out of the intake pipes and shit...my car runs a hell of a lot better.