Ewg on down pipe??
 

Never mind figured it out :p

Won't work. Please look up how a wastegate works and come again. You need an outlet for the gases BEFORE the exhaust gases enter and exit the turbine.

You aren't making a lot of sense but i'll do my best do interpret.

Your exhaust manifold must facilitate an external wastegate first of all. if you want your ewg to mix with your regular exhaust you'll need to modify the downpipe as well so that the ewg vent into the downpipe.

If you want to do vbands and external wastegate you still need to block off the internal gate port. Some people weld them shut. You could vent your ewg to atmosphere so you could use your old dp but still would want to make some sort of exhaust pipe for the ewg.

your other option is to replace the arm and flapper and run an IWG. sounds like you haven't thought our your turbo setup very well. go back to the build threads and read and learn more.

If you're not planning on running an ecu then forget anything i said. If you are planning on a stand alone ecu I recommend focusing on learning to tune your car and read as much as you can. don't get in too deep and waste a bunch of money and be upset about it. It sounds like your headed down that road atm.

don't turbo till your ready to turbo. it's more complicated then just buying parts and bolting them on.

If you run a Godspeed turbo, you don't need to get a standalone because its not a Garrett turbo.

oh that makes sense what was i thinking. :idea:

I have a my Ewg mounted after the turbo.
https://www.miataturbo.net/attachmen...ine=1359521722

You also have it mounted backwards.

Lol!!! This is the silliest thread I have ever seen!

Besides you apparently having your wastegate mounted backwards (as referenced by the orientation of every other wastegate I have ever seen), you also apparently have it attached to turbine housing at an internal wastegate location. That means that you indeed have your wastegate mounted BEFORE the turbine wheel (correct), although placement is not straight or ideal. Boost creep bro?

P.S. what car is that in/going in? Turbo mounted opposite from normal NA/NB mounting and dipstick on other side?

https://www.miataturbo.net/attachmen...ine=1359542461

I never said it was going in a miata. It is backwards in the picture. The guy I bought the setup from put it on, in a rush apparently. Said guy who built it is actually a member here, building a certain tube frame racecar with a very large efr.

The waste gate is post-turbine, between the turbine and the muffler. No boost creep.

Its an old IHI vj-23 ball bearing turbo, going in a protege 4wd. If I can get photobucket to accept more pictures I will post up better pictures.

no, it's not.

Here's a crappy pic. You can see the flanges for a ewg (I'm assuming) on the dp.
https://www.miataturbo.net/attachmen...ine=1359556206

okay, and?

I have this on the way (as you can see in the pic of the current setup I don't have this whole assembly)
So disregard the whole ewg idea. The flanges are going to be cut off and blocked and the dp is getting a vband flange welded on
https://www.miataturbo.net/attachmen...ine=1359556439

I just don't get why they'd put those flanges on for an ewg... Because eBay?

something like that. probably because whomever built it has a cheap line on EWGs and that's a simple way to make it work on a t3 using that manifold.

I can't tell if you are joking or not. The exhaust flows into the turbine housing and what ever gases are bled off flow through the wastegate. So if you are being facetious, true it is not in the flow path of the turbine.

The OP originally was asking about setups like this, or I believed he was. can't remember or see the question any more.

Im not.

so you agree, it's not behind the turbine.

Is today opposite day for you?



It would be physically impossibrule for the wastegate to be between the turbine and muffler, but able to "bleed off" gasses around the turbine.

It's not semantics, it's not a technicallity; it's simple NOT behind the turbine. It's infront of it. Route the damn tube all the way to the tailpipe, it's still in front of the turbine.

I see you bought the new 209 dollar ebay special. The manifold is fine, be prepared to have work done on the downpipe.

The flanges they have on the downpipe are perfectly fine. That manifold/combo is designed for a turbo using the tradition "Ford 5 Bolt" style turbine outlet and will bleed off enough gas through the hole to work well with an external waste gate. People have been doing it that way for years and years.

Don't make the mistake of thinking that is "after the turbo" because it's definitely not. That will bleed gases pre-turbine, not post turbine. That setup uses the same style waste gate hole for the turbine housing that most internal waste gate systems use, this just happens to have flanges for an external waste gate that will operate it vs. the traditional can and arm.

The whole hot side assembly is considered the turbine. True, the ewg is not behind the turbine wheel. That was not the intent of my post. Regardless of how you want to refer to it, it is physically comes after the hot-side but before the muffler. Which is something the op had asked about or I believed him to be asking about.

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no.

derp.

Hot town, summer in the city back of my neck getting burnt and gritty

Iantbody yeah my setup would have been similar to what you posted, I decided to not go that route though. Just going to make the dp a simple vband and stick with the internal wastegate. I feel the external wastegate is unnecessary for this size turbo and my goals

the size of the turbo or goals has nothing to do with the use of a EWG over an IWG.

Yeah the last owner of my car fabbed his own exhaust from the headers back so I went into this knowing that no off the shelf dp would bolt right up, ill definitely need to do some fabricating to make all of this work but that's half the fun :D

Okay, so give me your opinion.. Should I keep the flanges on and stick with a ewg or use the internal wastegate and make the dp vband?

it would surely be easier...

To just use a ewg? I just was unsure because I haven't really seen them put on a down pipe like that before so that's why I asked

yes, to use the ewg.


it's been done, as ianitaboy showed his setup, it's just not common and/or the ideal way to use them.

So let me get this right, you're eliminating the door flapper on the iwg setup so you can use the same hole for an ewg setup essentially removing the benefit of an external wastegate and keeping the negatives of the internal wastegate?

Pretty much. Mainly because the turbo I have and down pipe are allowing me to do so (since I'm missing the whole internal wastegate flapper assembly) and the fact that the down pipe is already a 5 bolt flange with ewg flanges already on it