Ignorant Dump

TSiWarrior · Mar 31, 2005

I bought my dsm and it has a custom external dump. It's a pice of 2" pipe comming off the side and goes about 12" down then ends. It really sounds horrible like a horrific exaust leak. Should I get it welded back into my exaust or what are my other options. It's a big 16g turbo and I have 2 1/2" exaust.

Lunch_Box · Mar 31, 2005

If you don't like the dump then just get it rerouted back into your exhaust.

oldman · Mar 31, 2005

You can either get a 2.5" o2 housing that re-routes or port the heck out of a 2G or evo o2 housing and sell the one on your car. I'm with you on the noise.

cfisher · Mar 31, 2005

You should hear my external wastegate dump out. :barf:

I don't like it.

project_tsi · Mar 31, 2005

yeah those dumps really sound horrible. Like a crappy fluttering. Best thing would be to buy a new 02 housing w/ re-route.

KAOTIC95gst · Mar 31, 2005

if you dont like your dump and you have the money to upgrade your manifold too, I suggest the setup i am running from dnperformance http://www.dnperformance.com/images/extkit_05.jpg :thumb:

i really am pleased with it and you dont get the loudness from the external dump

biglady112 · Apr 1, 2005

Well that sucks. I think the dump sounds awesome. All of my internally gated friends have them. They work well and sound great. Very pissed off. Just see of someone will trade you for a stock o2 housing.

Steve

just69ing · Apr 2, 2005

shit man ill trade you for a evo 111 o2 housing

98TalonTSi · Apr 2, 2005

That DNP is set up for an external wastegate rerouted. It sounds like this guy is talking about an internal dumped to the 02. IMHO, I think they sound like shit as well. An external wastegate sounds good, but is $$ and not always necessary.
If I were you buy a Thrush muffler and weld it on, It'll be cheaper and sound better...

suncad03 · Apr 2, 2005

yo my buddy had the same problem with his
but the problem was the cop's and two tickes
so one drunking night we took his stock 250r muffler
and put it on his o2 dump and i could not belive that sounded soo good
you can fined those things all over :thumb:

Evol krap · Apr 3, 2005

i love my dump... it scares the #### outta pple and it added performance

oldman · Apr 3, 2005

Evol krap said:
it added performance

Interesting...how much whp did you gain?

Dieselboy · Jun 14, 2005

Evol krap said:
it added performance

project_tsi · Jun 14, 2005

maybe he means it added performance by better controlling boost creep?

dsm4life · Jun 14, 2005

Main reason why i got the 02 dump was to help eliminate creep with new EVO 16G but i personally love the dump sound. It's only loud when YOU make it loud. Other then that racing people and having that thing open up just about always gives you that priceless looking on the other guys face. :thumb:

oldman · Jun 14, 2005

dsm4life said:
Main reason why i got the 02 dump was to help eliminate creep with new EVO 16G

I bet that didn't cure your boost creep did it? The key to solving boost creep is in porting if you're internally gated. An o2 dump is such a small factor in the whole equation that it's not needed at all. I just want to make this clear because a lot of people like you are being mislead into thinking an o2 dump will solved their boost creep. If you like the Honda sounding NOISE

, that's a different story.

99gst_racer · Jun 14, 2005

Whew.... No love for the dump.....

oldman said:
You can either get a 2.5" o2 housing that re-routes or port the heck out of a 2G or evo o2 housing and sell the one on your car. I'm with you on the noise.

This is good info. ^^^^

You are much better off selling the O2 dump housing to someone, then buy a rerouted one. Hell, you might even come out ahead on the deal. And it'll be much easier than modifying your dumped housing to make it a rerouted.

99gst_racer · Jun 14, 2005

oldman said:
The key to solving boost creep is in porting if you're internally gated. An o2 dump is such a small factor in the whole equation that it's not needed at all. I just want to make this clear because a lot of people like you are being mislead into thinking an o2 dump will solved their boost creep.

Aint that the truth. Most people fail to understand that the cause of creep is usually due to the wastegate flow path before the flapper door, not after. A dump isnt going to due anything beneficial if the passage in the turbine housing is left unported.

oldman · Jun 14, 2005

99gst_racer said:
Aint that the truth. Most people fail to understand that the cause of creep is usually due to the wastegate flow path before the flapper door, not after. A dump isnt going to due anything beneficial if the passage in the turbine housing is left unported.

It took a while but I finally got you convinced.

Does this mean you'll sell the external and join me on the internal side.

Coup D E'Tat · Jun 14, 2005

Well, on my 2G, with a stock exhaust mani., stock 14B, stock O2 housing, and a 3" cat-less exhaust, it would creep up past 22PSI from 15PSI. Did zero porting, cut my stock 2G O2 housing up and welded on a dump tube, and zero boost creep.

My .02

oldman · Jun 14, 2005

Coup D E'Tat said:
Well, on my 2G, with a stock exhaust mani., stock 14B, stock O2 housing, and a 3" cat-less exhaust, it would creep up past 22PSI from 15PSI. Did zero porting, cut my stock 2G O2 housing up and welded on a dump tube, and zero boost creep.

Every car is different and there are always exceptions, I guess you're one of the lucky few. You're the first person I know that cured boost creep this way without doing anything else. You could have easily achieve the same goal by porting the turbine inlet without going through all the trouble at the same time improve flow and spool up time.

99gst_racer · Jun 14, 2005

oldman said:
It took a while but I finally got you convinced. Does this mean you'll sell the external and join me on the internal side.

No, I'll always swear by external. I've always known how to fix creep in an internal, and I know it works, but I've never been a fan of the process.

Somebody's gotta be over here on the external side.

Coup D E'Tat · Jun 14, 2005

oldman said:
Every car is different and there are always exceptions, I guess you're one of the lucky few. You're the first person I know that cured boost creep this way without doing anything else. You could have easily achieve the same goal by porting the turbine inlet without going through all the trouble at the same time improve flow and spool up time.

Yea, that was the point I was getting it. However, when this was done, it was simpler for me to cut/weld the O2 housing, since I had nothing to port the turbo with.

However, the 14B does not need to spool any faster

oldman · Jun 14, 2005

Coup D E'Tat said:
However, the 14B does not need to spool any faster

good point.

dsm4life · Jun 14, 2005

oldman said:
I bet that didn't cure your boost creep did it? The key to solving boost creep is in porting if you're internally gated. An o2 dump is such a small factor in the whole equation that it's not needed at all. I just want to make this clear because a lot of people like you are being mislead into thinking an o2 dump will solved their boost creep. If you like the Honda sounding NOISE , that's a different story.

Dont know abotu your setup but it did fix my creep, thanks.

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