removing divider = less creep?

[paperboy]

well, i just put a ported 14b on my 2g w/ my new 3in turbo back exhaust and i'm in boost creep hell. fuel cut is fun at the top of 2nd. i'm
gonna pull it off this weekend and port the o2 housing more, but i've read that some people have removed the divider on the turbo, that seperates the wastgate and turbine.... just curious if anyone has done this and has good results? also would u then do the same on the o2 housing? i dont care how much i gotta take out as long as it works.
thanx if anyone has any good pics that would help too.

 

[L2RTSiAWD]

I've never heard of anyone doing that but it doesn't sound like a good idea to me.

The divider is there for a reason and I think by removing it the wastegate will open early and if it can't limit boost now I don't think it will with the divider removed and more exhaust gas going to it.

 

[talonted_one]

I have heard of that,but who knows if it really works. Even if it does work, what adverse affect if any does it create?

 

[paperboy]

exactly what i'm wondering...

 

[tanner261]

I had boost creep issues with my 16G awhile back and tried a few different things to fit it. I started out with a ported 7cm housing and a 29mm wastegate hole and 34mm flapper. I'd set my boost to 15 psi and it would creep to 19 by 6k RPM.

I removed the divider in my 2G O2 housing, this helped but didn't resolve the problem. Next I removed more material from the turbine housing leading into the WG hole making a smoother and more direct path to the WG. Bingo, this solved the boost creep.

You will also notice that the PTE turbos sold now have the divider removed on the turbine housing to eliminate creep. This may work in your case too, but I'd rather not destroy my turbine housing. You will not want to run an external dump either because exhaust gasses will always be flowing out the dump.

A large internal WG hole is not enough to stop creep, you need to go a step further and port the turbine housing leading up to the WG making a smooth path. Hope this helps.

 

[paperboy]

so u just want to port the bottom of the wastgate hole area and notch the o2 housing divider, or just port the o2 housing?

 

[mitsugsx95]

You can remove the divider, and it does get rid of boost creep if done correctly. I have it done on my 16g along w/ a 34mm flapper and i get no creep. When you port it, you have to make sure to grind it all the way ( there should be no step from the wg hole to go over). And the cut should be as big as the wg hole.

 

[smokehouse_83]

I did this it helped alittle bit but not enough. I think if I put a 34mm flapper on it would help more, but I dont think the ported 16g with a 6cm housing, ported 02, 2.5" downpipe, no cat, 2.5" exaust, and ported exaust manifold are helping matters any. I am going to build a custom o2 sesor housing by getting the flange from rre then putting a tial wastegate flange on the 02 hole and putting ss pipe down to the downpipe from the turbine outlet and get a 7cm exaust housing. This should stop creep!!!

Drew

 

[paperboy]

so has anyone removed the divider on just the o2 housing and had any good results? i just finished my port work tonight, spent most of the time on the inlet leading up to the wastgate hole. but if i put it all together for the 3rd time in a week i think the bat is coming out!

 

[paperboy]

just got it all in yesterday, NO MORE CREEP!. i ported the exhaust mani,
spent most time on the turbo inlet and the area going into the wastgate
hole, enlarged the flapper hole a bit and removed the divider on the o2 housing and ported that to match. i'm getting a spike to 19lbs for only a sec then solid 17lbs. if anyone having creep problems has a good air dremel and some carbide bits i would reccomend this 10x's over.

 

[DSMTurbo2]

well not to drag up an old thread but paper boy, i was wondering if you took any pictures of all the work you did. im having huge creep problems and need to have them solved soon. so any pics would help. thank you very much. Erik

 

[Boost Era]

I was just skimming the thread titles quickly and was like WTF? It looked like the title was "Removing the DRIVER = Less creep"