anyone know where to get external WG pipe thing for stock turbo?
#1
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anyone know where to get external WG pipe thing for stock turbo?
i have seen a pic of one...
the plate that caps over the stock WG and has the hole in it for your DP that has a hole drilled into it and a pipe welded to it for a atmosphere WG dump pipe.
On the back side of the plate there is a pice welded on to seperate the normal exhaust flow from comming out the new exit.
anyone know who makes these or who made one? Where can get one?
Any drawbacks of having this done?
the plate that caps over the stock WG and has the hole in it for your DP that has a hole drilled into it and a pipe welded to it for a atmosphere WG dump pipe.
On the back side of the plate there is a pice welded on to seperate the normal exhaust flow from comming out the new exit.
anyone know who makes these or who made one? Where can get one?
Any drawbacks of having this done?
#2
Compression Tester Guy
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Jaared, I know what you're talking about but I don't know where the pic is. However, I don't see the point. The stock S5 wastegate properly ported can handle some serious power without creeping because it "vents" both runners. However, the S4 only vents the one runner so I think it would creep, even with an aftermarket wastegate. I've ported my S4 wastegate to about as big as you can go and it still creeps on cold nights(http://68.201.92.155/fc/wastegate.html). Kinda seems like a waste of money to do all that work to install an aftermarket wastegate, if it's still going to creep. Anyone have first hand experience?
-John
www.TwistedRotors.com
-John
www.TwistedRotors.com
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Now I really don't get it.....you just want to vent the stock wastegate to atmosphere? Why? Does it help performance? All I see that doing is making a lot of annoying noise when your wastegate opens.
#7
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The way the stock wastegate works, is it just bypasses the turbine wheel, and dumps the exhaust back into the downpipe. With this tube, it completely isolates the exhaust from the turbo, and the exhaust from the wastegate. It will control boost creep alot better, and should help hold boost better as well. The S5 wastegate can be ported very large, about 35+mm if I remember correctly. Thats a good sized wastegate, even for an aftermarket one. The only disadvantage it has is the restriction of dumping the gases back to the downpipe, which acts as a restriction. This cures that. Plus open wastegates sound awesome
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#8
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Originally posted by TwistedRotors
All I see that doing is making a lot of annoying noise when your wastegate opens.
All I see that doing is making a lot of annoying noise when your wastegate opens.
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the downsides of this??? Noise. That is all, but some people don't see it as a downside.
This is a big DSM thing, a lot of them have external dump 02 housings, and they see huge gains from it.
This is a big DSM thing, a lot of them have external dump 02 housings, and they see huge gains from it.
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Originally posted by Jaared
some people think rap music is just "annoying noise"
some people think rap music is just "annoying noise"
I guess it would help out a bit in the restriction department.....I just don't think I'd like it on my daily driven car.
#15
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a guy makes a "Divorced" downpipe for supras...you have the downpipe for the exhaust, and then the wastegate has a seperate pipe, that just goes down and dumps out...i've also seen then for other cars where they are divorced at the beginning, and then it goes back into the downpipe usually right before it ends
#17
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I've got one of those in my car, but it joins back into the main exhaust. It was custom made with the downpipe.
IMO open wastgates are like loud BOV's. No performance gain, just "look at me!" noise.
IMO open wastgates are like loud BOV's. No performance gain, just "look at me!" noise.
Last edited by NZConvertible; 05-08-04 at 06:10 PM.
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Originally posted by NZConvertible
I've got one of those in my car, but it joins back into the main exhaust. It was custom made with the downpipe.
IMO open wastgates are like loud BOV's. No performance gain, just "look at me!" noise.
I've got one of those in my car, but it joins back into the main exhaust. It was custom made with the downpipe.
IMO open wastgates are like loud BOV's. No performance gain, just "look at me!" noise.
#20
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Originally posted by Rxmfn7
Yea I was thinking of actually making up a batch of 10 or so and selling them. I could use the extra cash, and my father works are a large machine shop, so Im sure I wouldnt have any trouble.
Yea I was thinking of actually making up a batch of 10 or so and selling them. I could use the extra cash, and my father works are a large machine shop, so Im sure I wouldnt have any trouble.
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Originally posted by NZConvertible
If joining your turbine and wastegate exhaust flows together results in a drop in power, your exhaust is too small.
If joining your turbine and wastegate exhaust flows together results in a drop in power, your exhaust is too small.
Sign me up for one.
#22
Technically, even a 3inch exhaust could be restricted by having the wastegate dump back into it. The sheer turbulance of having the wg flow hit the exhaust flow at 90 degrees could create enough back pressure on the exhaust to lose a little, but thats not the important part of this mod.
That same turbulance also creates back pressure in the wastegate killing flow. This piece would help reduce boost creep solely because of the more free flowing wastegate, although s4's could still probably use porting
That same turbulance also creates back pressure in the wastegate killing flow. This piece would help reduce boost creep solely because of the more free flowing wastegate, although s4's could still probably use porting
#23
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Originally posted by ninjaracing13
The sheer turbulance of having the wg flow hit the exhaust flow at 90 degrees could create enough back pressure on the exhaust to lose a little...
The sheer turbulance of having the wg flow hit the exhaust flow at 90 degrees could create enough back pressure on the exhaust to lose a little...