If anything, I think it would make it easier to control boost do to possibly more backpressure. Also keeps the sound down.

 

No problems with mine, XS T04E kit. Kills the noise from the wg too.

 

None at all with my old FC set-up.

If you see boost spikes, it'll most likely be your boost controller duty cycle and/or wastegate spring tension.

J

 

yeah, one problem! its to quiet!!!

 

I don't know why anyone would want to get rid of that sound...the sound of an external wastegate sounds so damn mean and also beautiful

 

Yeah like a cow burping

 

fookntite i guess u dont have your wastegate plumbed back into the down pipe.

 

doesn't the wastegate remain closed at idle so all the exhaust is being routed through the exhaust? and when you are under boost and load, it will open (either at spring pressure or when the boost controller gives the signal to open) and then vent the exhaust gases through the dump tube? So the car will only be really loud when under WOT with the wastegate open venting exhaust gases through the dump tube?

Just don't drive fast, then it won't be too loud.

 

yup it only opens when the desired boost level is reached.

 

No way, I love the sound of an open wastegate it sounds so damn mean. The other night, I was driving around and at a stoplight this mustang pulls up next to me and starts revving. I totally ignore him and as the light turns green I drive slowly but the guy wouldn't leave me alone and just paces me. This happens for about 3 stoplights and then finally he starts to slowly take off, then I just floor it in second gear and the wastegate screams open when I pass him. My friend in my passenger seat saw him jump up while I was passing him

needless to say, I'm one of the few?? people who don't want to plumb my wastegate back into the downpipe because I love the sound tooo much

 

still sounds like a cow burping top me though.

 

haha
cow burping...
never heard that before

 

I like the sound but... I was afraid i might cause an accident on the freeway with it open. I mean you are driving along and out of nowhere there is this tremendous noise... I think it freaks people out... that being said, now that i routed mine back in, I did lose a little power. Plus you can really hear any engine missfire at WOT with it open.. which I liked.
And back to the topic. My boost is much easier to control with the watsegate piped back in.
I am thinking about trying it open with a small muffler... anyone try that yet?

 

Is there any power advantages with the wastegate vented into the air or does it make no difference... just with sound?
Thanks

 

Open looped WGs (out into atmospehere) usually have slightly more HP then the closed loop WGs (back into the exhaust).

 

I never had any problems with mine either. An open wastegate draws far too much attention and sounds like a chainsaw..It is kind of cool though to hear the rotary screaming, but not on the street..Just my opinion, but I am also 32 years old. When I was 18, an open wastegate would have been the schnizzle dizzle, or whatever...

 

How much power loss is there? Im thinking like 3-5 hp? is that about right? My dump tube is open to the armospher and I can here it a idle. Its sounds like a exhuast leak(tick tick tick), or is that a exhuast?

 

XS told me that they've seen up to 20-30 rwhp loss on the dyno after they've had the wastegate routed back into the exhaust due to higher backpressure readings.

 

Sounds like one of your exhaust gaskets are leaking...could be manifold to turbo, turbo to downpipe, manifold to wastegate, etc....take a piece of tubing (vacuum type) and with the engine cold, start the car up. Put one end of the tubing up to your ear and place the other end near all of the gaskets mentioned above to determine which is leaking. There will be a noticeable increase in sound at the leaking gasket.

 

I think I might have a leak somewhere. When cold the car sounds different...kind of a bleat bleat bleat, or a ticking exhaust. I have the dump tube routed back in. It's very loud still. Sounds cool flooring it under an underpass. Backpressure reduces peak horsepower, but reducing backpressure costs torque (speaking in absolute terms). I think torque is more important in real world application.

 

I used a lawnmower muffler on mine and it can't the heat it basically just melted. Then I used a motorcycle muff. and it lasted 4all of six passes.

Wide open or nothing baby.

 

I just put a small "cherrybomb" on mine. They make a 1.75" model that's only a 17" long. I used some smaller 1.5"(than my 46mm Tial 1 5/8" outlet) mandrel pipe back about a foot and a half. Still a little loud when it opens but nice and deep. It resonates with the N1 and sounds great. Hope it doesn't burn out

 

I have a 2 1/4" downpipe and generator baffled tube muffler on my externally vented internal WG.

It has broken up the baffles a little so it rattles when you shake it (been on for ~1 month), but still quiets it down.

I mainly put it on because the stock internal flapper WG does not seal well at idle, but it does quiet down WOT nicely.