[onegeeTSI]

I've read many of the threads but this PARTICULAR answer hasn't been given...some speculate, some guess, some say it might, it might not...im wondering on a stock 14b set @12-14psi w/ a mbc, would a 3" turbo back w/ a test pipe not have creep due to the o2 elim internally dumped? i dont plan on porting the turbo because im getting a big16g w/ 34mm flapper soon...basically im asking how effective is the o2 elim.

got a bit confused when some dude said a high flow cat w/ such and such system doesn't creep but a testpipe with a such and such will..clarify

PLZ someone answer who has had first hand experience with this...much thanks and gratitude to anyone who replies

 

[GS-T]

Sorry, you aren't going to get one single answer. It depends on many factors that you haven't even addressed, such as temperature outside, elevation above sea level, etc.
I've heard a bunch of people say that there is no way a t-25 would creep with a 3" N1 downpipe and 3" N1 exhaust. But mine creeps right up to 22 lbs if I let it in the cold weather (with ported 02 housing). During the summer, no creep past 16 lbs.
Some people with the same set-up as me never creep at all.

 

[venom42]

I have an externally dumped O2 housing and a 3" exhaust. I am still running the 14B, and it will creep past 20 psi if I stay in it. So, I would say that an internally dumped O2 would still creep.

 

[MikeHuml]

I agree with Venom42.

Only way to truely eliminate boost creep is to enlarge the passage the exhaust flows through under the WG flapper. Stock hole is .9xx inches, needs to be at least 1.125" to work well on a 16g style turbo, even with an o2 dump.

Regards

Mike Huml
aka..slowboy

 

[venom42]

You know that is the first time I have seen anyone state the size that the hole needed to be. I appreciate that, because this is a project I need to undertake soon. I ported the part of the housing that mates up to the manifold, but did not port the wg due to time constraints. I have been kicking myself ever since! Now I gotta go through the crap of getting the exhaust housing off the turbo, with it still being on the car. Will the stock flapper still be able to cover a 1.125" hole?