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Old 07-18-2008, 04:57 AM   #26
dremersvision
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That is the thread that i read a while back also, it made me want to go with the EWG. i like the quick spool up of the td04, i dont know if this makes any sense at all but i want throttle response. i do not care about high horsepower numbers.

This is the main reason why i wanted to do an ewg, but i realised that the owner had a 2.5 and not a 2.0

how would this affect the ewg?
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Old 07-18-2008, 01:03 PM   #27
Chuck H
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Don't forget that in the final analysis, your engine is basically a big air pump that happens to turn the crankshaft as a side-effect. Reducing the backpressure on the exhaust side allows the motor to pump more air at the same boost pressure, thereby making more power. Or, if the turbo is already pretty much at the limit of its airflow, it allows it to flow that air at less pressure, meaning cooler charge temps, again resulting in more power.

The EWG with dump tube gives the "wasted" exhaust a nice short clean path out of the system, while it's still nice and hot and flowing fast. The internal wastegate dumps it at a right angle into the most turbulent part of the entire exhaust system.
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Old 07-18-2008, 01:32 PM   #28
Chuck H
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Hopefully not too much of a highjack, but I would like to go EWG at some point as well. Just not sure if I can live with an open dump tube for the wastegate.

Has anyone tried fabricating a setup where the dump tube joins back into the main exhaust stream near the far end of a long downpipe? I figured that the HKS downpipe might be a good candidate for the job, since it is dirt-cheap, apparently flows pretty well, and has a flat plate design on the turbo end.



I can't photoshop worth a darn, but figured you could have an exhaust shop fabricate a smaller parallel pipe that runs the length of the downpipe to attach the EWG outlet to. You'd be a lot quieter under boost that way, since the wastegate exhaust still passes through the muffler, but hopefully it joins in far enough downstream that flow is pretty smooth. Then I was wondering if you'd need to add an extension to the flange end of the HKS pipe, similar to MadDad, Crucial, etc. shorty pipes to help keep the main exhaust flow from using the bellmouth part of the turbo exit as an expansion chamber.
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Old 07-21-2008, 03:14 PM   #29
Clark Turner
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The internal gate with 8 psi spring cracks open around 4 to 5 psi and is fully open at 8 psi.

With the external gate and the correct hook up with the manifold pressure on the top of the gate you have differential pressure across the diaphram and spring assembly. This causes the onset of boost to hold the gate closed. They dont crank until the spring pressure and they open very fast once the pressure on the bottom port overcomes the top.

This results in a faster boost onset.


The internal gate is a simple one sided gate. The boost pressure only has to overcome a simple spring.


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Old 07-21-2008, 03:36 PM   #30
Super_HKS
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Good set up

Get a tial external wastegate
Get a downpipe that offers a External option

then take it to a shop and put in the new DP with the wastegate. Have a shop person fab you up a dump tube. After that seal up the interal wastegate on the turbo and walla your all set for your LOUD AS CRUNK EWG set up.

Not that having the EWG recirc back into the DP may decrease performance. It will be alot quieter if you go that route though. Personally id run a EWG with a dump tube. Gonna be more aggressive and be more efficient for performance gains
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Old 07-21-2008, 03:36 PM   #31
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^ BTW get a tune asap after the EWG set up please
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Old 07-22-2008, 10:47 PM   #32
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Clark, in regards to your post from 3 years ago about this car..

http://forums.nasioc.com/forums/show...1&postcount=58

Did you ever find out how much whp it was making? How come you only decided to target 13 lbs? Was the low boost levels due to the displacement or was it the high compression ratio (9.1 or whatever) found on most ej205/2.5L hybrids.

Last edited by mxpunk; 07-22-2008 at 11:09 PM.
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Old 09-02-2008, 10:23 PM   #33
jmlaser
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Bump for this old thread,...

Need to know about spring rates for the EWG,.... Does it work like IWG where you select a spring at 1/2 of your max desired boost?

I have a tial 38MM EWG setup on my TD04 and am getting ready to go to The 18G on a FMIC and METH. Plan on pushing it to 23 PSI or so,...maybe a bit more not sure untill the tune. Currently my EWG has the Large Red spring ( .8 Bar or 11.603 PSI) in it. If you set it up like IWG then I am covered (barely) correct????
Thanks
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Old 09-02-2008, 10:36 PM   #34
Clark Turner
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MX, That car was never dyno tested. I have no idea how much it made. It was real resonsive though.

JMlaser, As a rule of thumb, A boost controller should only add 8 to 10 psi of boost over the spring pressure. So you should have the 14 to 15 psi spring to target 23 psi.

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Old 09-03-2008, 02:13 PM   #35
jmlaser
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Thanks Clark, Large blue 14.504 psi spring on order
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Old 09-03-2008, 02:22 PM   #36
Clark Turner
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Should be perfect up to around 25 psi with most boost controllers. Stock system a bit less. Stock system with aftermarket solenoid will take you to 25 to 26 psi no problem. The max you would ever want to run on that turbo anyways...

Cya

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Old 09-05-2008, 06:15 PM   #37
jmlaser
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OK,... got my new (Blue) spring and some new gaskets. Boy that thing is not easy to reassemble. It looks as though the way I had the gasket last time had an ever so slight leak.

Does anyone know the proper sequence for the assembly of the gaskets and little wavy washers? Last time I used the wavy washers as a spacer in between where the gaskets go because the wastegate seat slightly protrudes. I noticed the gaskets have a ridged out side and an indented side. Does it matter which side goes toward the wastegate seat?

I scoured Tials website and really didnt find anything useful.
Thanks ahead for the thoughts and any help
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Old 09-06-2008, 12:51 AM   #38
sidewayz
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the "wavy" washers are "lock" washers for the bolts.. not spacers.
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