Hey guys,
Wondering what I can do to fix my problem....getting mad boost creep since the BERK dump went on. Now I'm not 100% but about 90% sure it's because not all the exhaust gases can be dumped and then it keeps building boost. Ive heard of either porting out the stock manifold or welding in a external wastegate and welding shut the internal one. What do you guys think ?

You can slightly port the standard wastegate which apparently helps. That's assuming your talking about a stock turbo ct26/20b etc

Yeah it's a CT26 with a berk full system.
SO porting it helps?

Whatsit creeping too, and do you have an fcd?

its not the wastegate flap hitting against the dump pipe, thus not opening all the way??
 
I know of a few guys that have to grind off a little of the dump pipe as the wastegate flap rubbed against it, pretty sure its the berk units that it happens too

I will second the wastegate flap fouling on the dump (I could see  when I took it off where it was hitting). I had heaps of issues with apparent overboosting where I changed actuators and lots of other things. Mine ended up being a setting in the ViPEC which was set incorrectly. The ECU though it was hitting a predetermined boost cut thus limiting ignition and altering fuel. It was just being tricked. Anyway I would avoid boring out your wastegate as once the material is gone you can't put it back and it is very difficult to know how much to remove before you have issues maintaining boost. You may well find yourself hitting your 8-10psi and then it falling away rapidly.

It will keep going until it hits Fuel Cut...I have an FCD in yes and have put it up to 13.5psi
But now that I'm reading it's interesting to hear that the wastegate door could be hitting the dump pipe....but yeah mine is a berk of course suited for the CT26......this is strange indeed!

This is what you need:
 

 
I don't know why none of the internal gate dump pipes for the 3S don't have it, it was the first thing I thought of when my 3S was creeping. Try cutting up a piece of 2.5in pipe into this shape then welding it in. Simplest and cheapest modification that can easily be removed if it doesn't work. Apparently (don't own one and don't know much about them) all the "better" WRX dump back systems use this design, specifically to prevent creep and from "MRT Performance" works well.

When you say "creep" you mean overboost right? my car with just a open exhaust used to hit 15psi on cold nights all the time. It is just what happens when you have such a large amount of flow. Ditch the CT26 as theyre rubbish anyway.
 
My car did make 152rwkw's with the open exhaust (hollowed out PP) and a pod filter but the power died after 5500RPM with the CT26.
 
Try and find a CT20B.

My understanding and experience of The waste gate flap hitting the dump pipe actually makes the car not boost on low rpm, not over boost
The flap gets stuck when it opens fully hitting the elbow on the dump pipe and getting stuck, thereby letting the exhaust bypasss the turbine all the time and eventually come on boost very late. It happens on the ebay dump pipes not the berk ones afaik, and can also happen to cars that have never had it happen before (like in my case when I was on a 4 hour drive) I guess the metal flap heated up enough to expand a lil bit causing it to jam, a good fang sorted it out for me
 
With the boost creep you mention, is it actually creeping or over boosting (they are 2 different things almost)almost all turbo will overboost on a nice cold night with a aftermarket dump pipe, some hitting fuel cut and falling flat on its face