boost creep and porting

[crashed97tsi]

Hey Guys,

Ok, I'm taking off of work and I bought a heavy duty dremel tool and bits. What do I need to port to get rid of this damn boost creep


I'm just looking for a list of what to port, so far I got this:

1. O2 housing - already ported, bought a tool so I could reach down there farther.

2. exhaust manifold - some say it decreases creep, others say it decreases spoolup time. I always thought it decreased spoolup time

3. check to see if wastegate flapper is opening completely, If not, port it out so it can.

4. port wastegate passage and wg hole, possibly go with a bigger flapper <-- how do I do this? Do i have to take the turbine housing off the car? The turbo I got from Agp was already ported.

5. Go with a external dump - most of the time doesn't work

6. Go with an external gate - Only want to do this as a last resort.

So am I missing something? I really need to get rid of this creep, I'm getting sick of driving like a little girl.

Thanks guys

 

[kpt4321]

Freakin' A, boost creep threads are like, a daily thing.....

http://www.dsmtuners.com/forums/showthread.php?postid=381862#post381862

Search if that's not enough, and check out the VFAQ.

However, it sounds like you have the right idea anyway.

Porting the manifold will not do anything for creep, if it did, it would only make it worse.

Keep in mind that the door doesn't open very much, that's why you need to port out the exit area.

If you need a bigger flapper door, you just grind the old one off, and install a new one, which you can buy from tons of the vendors.

Oh, and good luck porting with a Dremel.

 

[crashed97tsi]

the dremel works fine, my brother is using it right now to port out his intake manifold.

when you say the exit area. Do you mean on the o2 housing or on the turbine?

 

[jbillakdsm]

Man, good luck using that Dremel to do all that porting and polishing. If you want to reach further down in, buy the snake-like extension for your Dremel. I use two different carbide bits to grind of the majority of the metal and then use the dremel with some fine grinding wheels and then some polishing to finish off my O2 housings. I think when he is talking about the exit area he is talking about on the exhaust side of the turbo housing before it goes into the O2 sensor housing.

Another option you might want to look into is building your own tubular O2 housing with flanges from RRE and then find someone local to weld it all together.

 

[JET]

You need to heavily port the area where the WG passage meets the main passage. Just think about the air flow. You need to make the upstream corner less sharp so air can get in there more easily. That and make the hole for the flapper as big as possible. You shouldn't run into any problems with a B16g and under if you did a good job porting.

 

[greyGS-T]

I have heard to watch out for stainless steal flappers. I guess people have been having problems with them warping under the heat.

Matt

 

[crashed97tsi]

Originally posted by jbillakdsm
Man, good luck using that Dremel to do all that porting and polishing. If you want to reach further down in, buy the snake-like extension for your Dremel. I use two different carbide bits to grind of the majority of the metal and then use the dremel with some fine grinding wheels and then some polishing to finish off my O2 housings. I think when he is talking about the exit area he is talking about on the exhaust side of the turbo housing before it goes into the O2 sensor housing.

Another option you might want to look into is building your own tubular O2 housing with flanges from RRE and then find someone local to weld it all together.

We have the extension, and I'm ordering the carbide bits. I know it's not the best thing, but It's all I have.

I already ported the o2 housing, but I guess not enough. I'm going to open the passage up more. I already have the housing enlarged as far as the gasket goes on both sides. The only thing I can think of is that I didn't take out enough of that divider.

Well, thanks for the replys guys. I'm going to try your suggestions. I'll let you know how it works out.

Dan

 

[jbillakdsm]

If you can get your hands on one, try using a plasma cutter an taking the center out completely if you can.

 

[Ben K]

Porting of the o2 housing is not going to help. It is in the turbine housing. I offered to send you another turbine housing, ported a little more in the wg hole with more of a step to direct the gasses. Do you want us to do that for you?