[STi926]

I am about to install a TXS turbo back exhaust and was wondering if I absolutely need to port the turbo to avoid boost creep. I have read that some peole say yes and some people say no. Also wondering if a UTEC will work in place of porting the turbo when it comes out of course. Any input is appreciated

[Boxer]

Better safe than sorry, I'd port.

[abdi]

It is my understanding that with proper engine management and tuning maps your stock turbo will not need porting. Downpipe desing is also important. There has been a lot of discussion about this. You might want to get familiar with some it. Here is a place to start. I'm not trying to convince you either way. There is just different ways to go about it.
http://forums.nasioc.com/forums/show...ht=boost+creep

[STi926]

my intentions are to get the UTEC rather than porting, I was just wondering if the UTEC would prevent boost creep as porting does?
Thanx

[pestysti]

boost creep can be prevented (in my case) with a high flow cat that come with the TXS exhaust if you go kitty-less i'm pretty sure youll be creepin

[renichms]

Be safe. Port the wastegate.

RN

[Thorn]

I have the Turbo XS TBE w/the high flow cat and I had boost creep, get the waste gate ported.

[pestysti]

really bad enough to hit fuel cut ?? i guess i should have been more clear i have creep but no cut on my car just a little bit of creepin
PS does anyone have a before and after pic of what the wastegate looks like b/f and after

[salisburyv]

that little bit of creep....what numbers you been hittin? i hit 1.3 bars a couple of times..i got yelled at...it can damage the turbo or a least shorten it's lfe...my two

[FT@SGP]

I talked with Cobb Tuning today on this very issue and I am told that wastegate polishing only targets the sympthom, the real problem is in the ECU and that needs to be updated.

We are not even going to put out Cobb's Turboback system on sale at this time until they come out with the ECU update within the next 6-8 weeks.

[salisburyv]

i thought the real ineffieciemcy was the fact the wastegate was too small to accomodate the gasses trying to escape? I was told that an external wastegate of a bigger size would work but engine management would only open it sooner and not deal with theissue of the volume....no? have i been lied too?

[FT@SGP]

Originally Posted by salisburyv

i thought the real ineffieciemcy was the fact the wastegate was too small to accomodate the gasses trying to escape? I was told that an external wastegate of a bigger size would work but engine management would only open it sooner and not deal with theissue of the volume....no? have i been lied too?

Honestly, I am not knowlegeable about the issue enough to comment beyond what I was told. You might want to call Cobb and discuss this with them, they are very responsive.