2G Externally Dumped Tubular O2 housing?

[Stoner]

I just installed my new Evo 16g and I am using an externally dumped tubular o2 housing. Upon my initial test runs the sound is very odd. I am curious to know what other people have experienced with this type of set up.

Note that my SAFC settings are extremely rich to be safe before my egt guage gets installed, and I dont know if that has anything to do with the sound at all but just FYI.

I am getting a sound like wooshing air mixed with a miss sounding noise. The best I can describe it, it is like a putt putt putt really fast sound. Usually the wooshing sound comes on as the wastegate opens and the other sound comes on in the higher rpms above 5k.

To me if this is the normal sound it is very unpleasant and makes my car sound like a piece of sh!t.

Any feedback would be great.
Thanks

 

[Blue92]

By running a dump tube off the wastegate, you basically run a straight tube off the engine, that is when the wastegate is open. So, in essence you are running a tube of exhaust flow straight from the engine with no muffler or any sort of noise control over it. It's gonna be loud. I would worry more about how it runs, are your plugs/wires good? That would cause a misfire.

 

[1fast97gsx]

I'm not sure if my sound was like yours but I'm running an external wastegate and the best way to describe the sound my car made was a "helicopter" ... I too think it makes the car sound like a piece of shit and want to get rid of the dump but I don't want to spend the money either to have it rerouted :-/

 

[Stoner]

I have new ngk's and accell wires so they should be good. The car isnt actually misfiring just sounds like it.

I definately agree with the helicopter analogy. It sounds like a war is going on under my hood at wot, :laugh:

If that is how it is suposed to sound then I guess I am going to have to go another route, I cant see how very many people would stand for this type of noise.

Do all external wg's sound thas way or is there a different route you could go for sound purposes?

 

[1fast97gsx]

Do all external wg's sound thas way or is there a different route you could go for sound purposes?

All dumped wastegates sound like that. You can get an external and route it back into the downpipe and it won't sound like that anymore though. I don't like the sound either ... but it only does it at wot so it helps keep me out of boost so I don't have to hear it.

 

[gstpst]

Yeah I agree. I just installed mine last night and I was going to post this exact thread. My car sounds like a broken motorcycle when the wg opens. I was actually think of something cool that I could do at work today. I am not sure if anyone has seen this item but it is a mini bomber muffler, it is made for making duel exhaust systems on imports (which is the most worthless thing you could ever do to a 4 cylinder) but anyway, I was thinking of getting some 1" mild tubing and fabbing up a mini exhaust system for the dump
tube, and I was going to have it come out the side of the front bumper. Do you guys think thats ### or cool, it sure would quite it down w/out loosing any HP

 

[bus]

I have herd of this being done with a supertrapp muffler. I think they make a small one for something like this.

 

[alex99gst]

ive seen somethin like that done a while back, there was a sport compact car where they did the top 10 car thing or w/e and they had a yellow integra that had what you are talking about wg tube coming out the side of the bumper. i dont know about cool or not but whatever floats your boat

 

[Turblown]

Are you guys talking about externally dumped or an external wastegate? I hear that externally dumping is way loud and annoying, but that an external wastegate isn't half as bad.

 

[95GSXBLUR]

External O2 Dumps and External Wastegate that dumps to the Atmosphere both will sound very similar... the best comparison that I've come up with is like the Blow Off Valve constantly purging. To me it sounds like a consistant wooshing noise - it's completely normal for the parts that you guys are using.

I don't really like the noise either, besides it sounding like you mean serious business in a race, however, i decided against the whole external gate set up, being how my car is registered in VA and i have to stay street legal. I stuck with the Evo III O2 housing. For those guys running internally gated turbos, get the largest flowing O2 housing that doesn't dump (i.e. the Evo III, ported) those guys running a external gate set up will have to weld the dump tube to the downpipe.

Anyone on the street, that you drive by, that actually knows what their talking about or even cares, will know what that sound is. it might make it sound like "a piece of sh**" to the average person... but we all know it's not

 

[gstpst]

Can anyone dig up some pics of that acura's set-up, I would really like any pics of the set-up I was talking about, thanks

 

[Stoner]

Yeah I agree. I just installed mine last night and I was going to post this exact thread. My car sounds like a broken motorcycle when the wg opens. I was actually think of something cool that I could do at work today. I am not sure if anyone has seen this item but it is a mini bomber muffler, it is made for making duel exhaust systems on imports (which is the most worthless thing you could ever do to a 4 cylinder) but anyway, I was thinking of getting some 1" mild tubing and fabbing up a mini exhaust system for the dump
tube, and I was going to have it come out the side of the front bumper. Do you guys think thats ### or cool, it sure would quite it down w/out loosing any HP

Thats strange I was thinking about something along those same lines. I would definately like to know how that turns out. I drove some more tonight and it actually sounds pretty good when you stay out of full boost like when racing or just short bursts like tromping it in 2nd or 3rd. The main time that the sound is overwelming is when doing a full quarter run. So I guess that I can live with it for now but I will be in search of something a little queiter or a way to quiet this one down a little

Pm me with your findings on the muffler idea

 

[gstpst]

I have been checking out the supertrapp mufflers, and there like $80. I don't even think we would need a muffler, just a resistor, but them supertrapps look sweet

P.S. anyone with the pics

 

[gstpst]

I found the pic, it looks sweet

You must be logged in to view this image or video.

 

[1fast97gsx]

I saw a pic of a black 2g with the dump going out the side of the bumper too. I also heard they had to put a metal plate on the bumper by the pipe because it was way too hot and kept burning the paint off on the bumper. I'd rather just spend the money and route it back into the downpipe.

 

[Talonman]

punishmentracing.com has a routed-back tubular 02 housing for $145.

 

[gstpst]

I don't know about you guys, but I want the sound just not as loud

 

[Stoner]

I could not agree more, if it was about half as loud I think it would actually sound good.

Does anyone have a link to where the Supertrapp that would be about the right size can be purchased. I would like to see it. Also how would you suggest mounting the muffler to the dump tube, weld, clamp or what?

I guess I am not the only one with concern of this sound eh!

 

[gstpst]

Look on Ebay for the supertrapp, it needs to have a 2 in. inlet, and I plan on welding mine
on

 

[coltboostin]

I just installed my new Evo 16g and I am using an externally dumped tubular o2 housing. Upon my initial test runs the sound is very odd. I am curious to know what other people have experienced with this type of set up.

Note that my SAFC settings are extremely rich to be safe before my egt guage gets installed, and I dont know if that has anything to do with the sound at all but just FYI.

I am getting a sound like wooshing air mixed with a miss sounding noise. The best I can describe it, it is like a putt putt putt really fast sound. Usually the wooshing sound comes on as the wastegate opens and the other sound comes on in the higher rpms above 5k.

To me if this is the normal sound it is very unpleasant and makes my car sound like a piece of sh!t.

Any feedback would be great.
Thanks

Sounds about normal. Looks liek you sould have researched the product befor you purchased it, external dumping is very loud, and anouying to some.

 

[falcone4g63]

i have an external dump on my car and from inside the car with the windows down it is loud as hell but i was at the track one day and i guess some dsm guys seen me make a pass and came up to check out my car. i told them i had a o2 housing with dump and they were said they didnt even hear it. but i havent heard it outside the car yet but i like the sound and i miss it sort of because i havent drove my car for two months, damn trannys! :thumbdown

 

[Stoner]

I actually got the o2 housing along with some other used parts that I bought off of ebay paid less than $100 for the o2 housing. I just figured that I couldnt go wrong. I knew that it would be loud but I had never heard one before.

 

[Dieselboy]

I dont see how you guys could not like the external dump sound, it's great .

Yes, its extremely loud but what do you expect? As said, once the WG opens, you are running open exhaust at that point through that tube. I have heard externally dumped internal and external WG's and I must say externals sound louder, but better to me. With virtually any internally gated turbo, the WG is going to open before full boost. So instead of a sudden punch of sound, it just gradually opens.

A good external WG will stay completely shut and quiet until full boost is achieved, then it opens with a fury . Another thing to point out with an externally gated WG, is the placement. If its flanged on the #1 runner of the exhaust manifold, its going to be extremely loud and raspy mainly because its positioned so close to the exhaust point of entry into the manifold. Its going to sound like your running w/o an exhaust runner on that cylinder. However, if the WG is positioned on the O2 housing or somewhere after the exhaust manifold and dumps off all 4 exhaust runners, its going to sound alot cleaner w/o as much rasp (more like an extremely loud hiss or gush of air).

 

[SikRacing97GST]

I love the sound of the external dump, but you know i have never really heard the Internal Dump, i wonder if it makes any sound difference compared to a ported 2g O2 housing... I dunno I would much rather have the external dump, it emarasses the mustang guys w/ their flowmasters j/k (FYI my friend gets called rice and Pos for having the ex dump :thumbdown ) what do they know..............

 

[btracer]

i have the external dump out the front bumper and ive actually had people come up to me asking if it was some kind of crazy side exhaust, ... i guess it sort of is, but i love the sound when it opens... scares people!