If you look at the link that "whoang" so helpfully posted then you could imagine cutting part of the dump tube off and welding the WG flange onto it. Of course placement might pose a problem due to interference with existing engine bay layout.

If you left the dump tube intact and didn't shorten its length, then you could possibly place the WG at the very end of the dump tube. This would be the easiest location and involve the least plumbing contortions.

 

If you are going to go this radical, remote WG route, don't tell me that you are also planning to merge the WG discharge back into the exhaust stream at the DP or the test pipe! I would just VTA otherwise the plumbing will become really tortuous and complicated.

 

no its def gonna be VTA... yeah mounting it on that dump tube like you said is a possibility... is that what u meant on doing wiht the EPM one?

 

Yeah, exactly what I meant. Mounting the WG at the end of the dump tube would be easiest. Just remove the flapper valve from the turbine housing altogether.

And since you want noise this would place the WG discharge a few inches above the pavement. I had a similar setup on my old Buick GN. We flanged the crossover pipe and positioned the remote WG pointing downward, right above the pavement. The roadway surface really intensifies and reflects the dump noise as the sound bounces up, off the asphalt when the gate cracks open.

 

oo thats a pretty good idea i will have to give that a thinking, thanks... can you see any problems that would cause?

 

http://www.rallysportdirect.com/shop...ng-p-2721.html

i think this is what you looking for a o2 housing w/ wastegate flange

 

Like I said, you might want to call, "Q", at EPM. He is more familiar with the possible clearance issues that you may run into when locating a remote gate on the end of one of his dump tubes.

He has several versions, with different routing paths. I think it would be easiest to mount the gate at the end of the dump tube. You just have to find out which version affords the most unencumbered exit surround on your particular car.

 

The HAFE piece is designed for a T3 4 bolt outlet to be used in conjunction with their cast T3 manifold.

To correctly do external gated on the manifold with a stock-type turbo, you'd need to run twin gates since it's twin scroll. Otherwise you'd have to Y together a wastegate passage from each side of the collector to feed a single gate. The problem with that is you'd be merging the pulses from the two scrolls and negating much of the benefit of having a divided housing.

If I was going to run external on a stock type turbo (which I wouldn't waste my time doing), I'd do it on the o2 housing. You could buy a tubular housing with an external dump and cut it off at the flange and weld your wastegate flange to it with a short extension tube. DSMers have done this for many years. You could also contact one of the shops that makes o2 dump housings and have them make you one with an external flange already on it. I'm sure JMFab could accomodate you with this.

Bear in mind that even with the gate on the o2 housing, you're still going to have an area where both wastegate passages merge together before the wastegate flange, which can cause pulse reversion and cross-contamination and negate the whole point of twin scroll.

 

Good observations Steve. I had never thought of the flow reversion on the T.S. 's myself.

 

i no about the twin scroll idea on the stock mani thats what why i didnt wann go with it there but i can see there being much of a porb mounting it on the manifold that already has a wastegate flange on it