AMS Downpipe, yea.
perhaps, if you scroll down more on that link...you'll see the external wg setup..it's an option for that specific 02/dp combo... 
meatevo has been running a similar ewg setup...no issues at all (from what i know)..he's holding boost upto redline pretty well...i'll post up his thread if it is ok with meatevo..
meatevo has been running a similar ewg setup...no issues at all (from what i know)..he's holding boost upto redline pretty well...i'll post up his thread if it is ok with meatevo..
Wtf, that's not an EWG man...
That's an IWG with a divorced outlet... the EWG on that is after a welded/gutted open IWG.
Phantom, it's not possible for that exact reason. External wastegate must come off of the manifold and from there it can either dump to atmosphere or it can re-join the exhaust at any point (typically on the d/p).
Edit: But I do see what you mean with an EWG coming off of the IWG.
That's an IWG with a divorced outlet... the EWG on that is after a welded/gutted open IWG.
Phantom, it's not possible for that exact reason. External wastegate must come off of the manifold and from there it can either dump to atmosphere or it can re-join the exhaust at any point (typically on the d/p).
Edit: But I do see what you mean with an EWG coming off of the IWG.
Last edited by tonyboy; Dec 7, 2009 at 11:40 AM.
The purpose is to use the stock manifold or a manifold without an EWG flange, but still use an EWG by gutting or welding open the IWG and have it pass straight through to this EWG... basically this EWG over the IWG (for whatever reason you don't like the IWG).
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From: Philly
on the ets divorced o2 downpipe the wastegate goes right on the divorced part. on a t3 exhaust manifold it has flanges built in (either 1 or 2) for the wastegate. i have the full race exhaust manifold that isnt t3 design and doesnt have flanges for a wastegate and i have the ams o2 downpipe with is widemouth with no divorced section for an external wastgate. better? lol sorry if i was vague before.
I highly suggest that individuals in this thread research before jumping to conclusions. Boost is a measurement of the airflow that does not make it into the combustion chamber.
A wastegate is a valve that diverts exhaust gases away from the turbine wheel in a turbocharged engine system. Diversion of exhaust gases regulates the turbine speed, which in turn regulates the rotating speed of the compressor. The primary function of the wastegate is to regulate the maximum boost pressure in turbocharger systems, to protect the engine and the turbocharger.
^Therefore, if you know WHAT an external wastgate is, and how it works, then you would know that it will fuction properly off the exhaust manifold(limiting exhaust flow=limiting boost) or off the turbine housing aka downpipe(direct limitation of exhaust flow from the turbine housing before spooling turbine blades=limitation of comprssor blade rpm, limiting boost!)
External wastegates are commonly used for regulating boost levels more precisely than internal wastegates in high power applications, where high boost levels can be achieved.
I hope this information helps those of you who are confused!
A wastegate is a valve that diverts exhaust gases away from the turbine wheel in a turbocharged engine system. Diversion of exhaust gases regulates the turbine speed, which in turn regulates the rotating speed of the compressor. The primary function of the wastegate is to regulate the maximum boost pressure in turbocharger systems, to protect the engine and the turbocharger.
^Therefore, if you know WHAT an external wastgate is, and how it works, then you would know that it will fuction properly off the exhaust manifold(limiting exhaust flow=limiting boost) or off the turbine housing aka downpipe(direct limitation of exhaust flow from the turbine housing before spooling turbine blades=limitation of comprssor blade rpm, limiting boost!)
External wastegates are commonly used for regulating boost levels more precisely than internal wastegates in high power applications, where high boost levels can be achieved.
I hope this information helps those of you who are confused!
Since the external wastegate doesn't have this restriction on its size and bulkiness, its first priority is what you said, more precise regulation of how much exhaust gas will pass through the turbo and how much exhaust it will divert around the turbo to limit turbine speed.
Edit: question though... what's more important in an IWG? The actuator or the waste gate itself??? Which one is responsible for common wastegate problems?
Last edited by Frankiago; Dec 8, 2009 at 06:28 PM.
Yes, but why are they more precise? Internal wastegates must meet size restrictions since they are included within the turbo's housing (the original housing can be designed even bigger if they want more space for an IWG obviously) and as a result have their limitations. External wastegates generally don't have to meet this space restriction and as a result, the flange on the exhaust manifold (or downpipe, apparently) is placed accordingly to allow for free space to put the external wastegate.
Since the external wastegate doesn't have this restriction on its size and bulkiness, its first priority is what you said, more precise regulation of how much exhaust gas will pass through the turbo and how much exhaust it will divert around the turbo to limit turbine speed.
Edit: question though... what's more important in an IWG? The actuator or the waste gate itself??? Which one is responsible for common wastegate problems?
Since the external wastegate doesn't have this restriction on its size and bulkiness, its first priority is what you said, more precise regulation of how much exhaust gas will pass through the turbo and how much exhaust it will divert around the turbo to limit turbine speed.
Edit: question though... what's more important in an IWG? The actuator or the waste gate itself??? Which one is responsible for common wastegate problems?
It is a spring loaded diaphragm, with an extending rod, functioning off intake manifold pressure. It is mechanical. The diaphragm spring holds the rod which holds the wastegate valve closed. It only opens as manifold pressure exceeds the preset spring pressure, allowing exhaust gas to bypass the turbine wheel.
The internal spring and/or length of the actuator rod can be adjusted to maintain closed valve position for a desired psi.
A good internal wastegate will work just fine if it's operating within the boost and exhaust volume it was designed to operate in.
BUT - Sometimes IWG have problems controlling boost due to lack of flow. An external wastegate allows for superior boost control due to greater flow compared to an internal set-up. Larger openings allow for more flow, without a complex rod and valve system. Plus, EWGs can be applied to ANY turbocharger system!
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