boost creep or what????

Alright I think my car has boost creep but not quite sure. Its a 97 gst with a big 16g on it. And it boosts fine until I hit 6000 rpms then the boost will go from 14 up to 20 within a second. As for my awesome exhaust system thank to the previous owner, which consists of the 02 housing bolted onto the turbo, and the downpipe is welded to the o2 housing but due to the sh** wleds its cracked. The exhaust is custom 3 inch piping with a universal cat and a nexus muffler. This is why I believe its creep, please tell me if im dead on or way off

This is boost creep. http://www.youtube.com/watch?v=Zrf1FgXQxs0 
 
You see the boost reaching the desired setting, and continue rising. This is because your wastegate is too small.

Apparently it jumps up.. not creeps. So that to me means the wastegate isnt opening

thanks i'll try opening it tomorrow and we'll see what happens

and yeah i'm not sure actually it might have been like the video i'll tell ya tomorrow after i drive it again, if it's the shooting one i'll try the wastegate

yeah it seems to be creeping up there, could that be due to my ghetto fab exhaust?

No... it has to do with not removing the excess exhaust gas quick enough. You need a bigger wastegate.

but how the fu** did it boost fine before at 20 psi? that doesn't make sense to me

oh i read if you keep running 20 psi and more constantly it'll wear out,got it ha
and yeah i took the rod off the actuator side like TE told me to, and drive it like that, took longer to boost but still boosted fine and bogged around 6k rpm's

Hmm... i need to see a video of the boost gauge under hard acceleration.

He told me that he was getting almost no boost up till about 4k rpms and then it build boost. This tells me that he only has boost creep. If the wastegate was stuck he would have built boost before that. So its only boosting once he starts flowing more air than his system can handle.
 
The only way to fix is either port everything and get a bigger flapper, or like he said he might do, sell the turbo, get a new one with a better flapper, and a new o2 housing

As of right now, im just gunna get my turbo ported by ams and have them install a new 34mm flapper, which they quoted me at 200 bucks, which IMO isn't too bad. So I will prolly be sending it out next week for that. Im also going to scrap the sh**ty custom exhaust and get a downpipe and catback from megan, and also an external dump o2 housing

does this sound right to anyone else, that that's my problem?