O2 housing or eliminator downpipe?

[alex99gst]

just asking for an opinion, what are the advantages and disadvantages of going with an O2 housing bolted to a downpipe, or and eliminator downpipe. thanks

 

[doug]

An O2 Eliminator downpipe will flow more than even a ported O2 housing.

 

[jbillakdsm]

The O2 eliminator should also help with boost creep issues.

 

[kpt4321]

The odds that any kind of O2 housing/Eliminator exhaust will help with boost creep are VERY slim. In fact, you could make boost creep worse before you made it any better.

The Eliminator is a total bi*** to install, and expensive. I personally would get a nice O2 housing from somewhere like 122 performance, or I would just run a ported one.


....Kyle T.
93 TSi AWD "TURBO4"
14b - 12.8 @ 108

 

[doug]

Originally posted by kpt4321
The odds that any kind of O2 housing/Eliminator exhaust will help with boost creep are VERY slim. In fact, you could make boost creep worse before you made it any better.

Could you explain that a little more please? I was under the impression that a higher flowing exhaust path out of the wastegate was the major cure for boost creep. Well, that and porting the flapper.

 

[RnR Racing]

I would recommend the 3" 02 elim as it will bar far perform the best. It flows a lot more air than a 2.5" unit and helps the turbo spool faster. We are actually using 2" int dump tubes which are very large and pretty muc prevent boost creep on all the car we have tested. This is pretty unusual on a 3" set up.

Also our 3" 02 elim downpipe is super easy to install. Once you have the old downpipe and 02 sensor housing off it takes onloy a couple minutes. People saying it's hard to install probably having installed one of our units.

Overall the 3' 02 elim will give you the biggest gains and is the same price if you were to buy a 2.5" 02 housing and a 3' downpipe seperately.

 

[122andy]

Originally posted by RnR Racing
We are actually using 2" int dump tubes which are very large and pretty muc prevent boost creep

The following info is just for reference, and is just what I have experienced in the past.

2" is a pretty big dump tube. I tried using that large of a diameter in the past, and actually had problems with it dumping too much, boost would actually fall off 3-4psi when the gate opened. Of course, this was on a small 16G setup that already had problems holding boost due to it being maxed out(ran 11.9s) so the 2" dump just compounded the problem. You might be able to get away with running that large of a dump tube on a larger turbo.

When it comes to creep it doesnt matter how large the dump tube is if your turbine housing isnt ported correctly.

 

[Ben K]

Originally posted by 122andy
When it comes to creep it doesnt matter how large the dump tube is if your turbine housing isnt ported correctly.

That's been my experience too.

 

[EclipseRolllin]

Ok i bought a 3" Downpipe and it eliminated my cat but i have a check engine light. I went to autozone for their free test and it said Catalitic Under threshhold he asked me if i had one i said no. So how can i eliminate the O2 Sensor down there. I would appreciate any kind of info.

 

[122andy]

Originally posted by EclipseRolllin
Ok i bought a 3" Downpipe and it eliminated my cat but i have a check engine light. I went to autozone for their free test and it said Catalitic Under threshhold he asked me if i had one i said no. So how can i eliminate the O2 Sensor down there. I would appreciate any kind of info.

With all the heavily modified OBD-II cars out there, there is plenty of info on this subject if you do some searching on the net or even on this forum. There are different ways to deal with it, including leaving it be, buying a 02 simulator, running a high flow cat, etc.