Open Wastegate?

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myRed240
Posts: 627
Joined: Sun Jan 12, 2003 9:42 pm
Car: '95 Nissan 240SX with a KA-T!
'07 Audi A3 2.0T DSG
'11 G37S Sedan
Location: San Diego

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I'm not sure if I want to go the open wastegate route or pay the extra to have it routed into the dp..... I like the idea of it being quiet, but I also like the idea of not having to pay the extra $$$ (Unless it's a small difference).

Anyone have sound clips/videos of open wastgate vs routed?

Advantages of open vs routed....

Basically I want to know opinions of those with experience .

Thank you much,

Alex


KATwo40
Posts: 1761
Joined: Tue Feb 01, 2005 9:40 am
Car: 1993 240sx KA-T

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This is a topic that has been overly exhausted (no pun intended) and you really should search for this type of thing.

Running an open wastegate has pros and cons, just like any other modification to a vehicle.

Pros:

Less restrictive gas flow from the wastegate and main exhaust stream means that the exhaust gas velocity will remain higher, helping to get that hot gas out of there. This will allow the turbine to flow more freely. Sometimes the boost threshold is lowered a few hundred RPM by doing this mod.

Cons:

It's a bit loud, and the ehxuast gases can get into the cabin of the vehicle when the wastegate is open, if not routed far enough under the car.

Another issue is the added heat in the underhood area if you just dump it right into the engine bay, beneath the manifold.


Structure240sx
Posts: 5615
Joined: Sun Oct 06, 2002 5:04 pm

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sound wise there is a huge difference depending on how much boost you run. in the 7-10psi range that alot of guys run an open wastegate screams. when you start to get into 15+psi the car starts to sound amazing. you start to hear more turbo whistle than wastegate


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GEO
Posts: 6449
Joined: Mon Jul 07, 2003 3:15 pm
Car: 95 240sx KA-T
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he's alive?

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myRed240
Posts: 627
Joined: Sun Jan 12, 2003 9:42 pm
Car: '95 Nissan 240SX with a KA-T!
'07 Audi A3 2.0T DSG
'11 G37S Sedan
Location: San Diego

Post

Thanks, for the responses. I've read up on the few posts that covered open wastegates, but I guess I was really just hoping for some sound clips. I'll just go for what's more economical at this point. (I've spent far more on this setup than I intended too; wifey isn't exactly too happy about it )


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