its normal for our twin scroll turbos....thats how the wastegate operates...

 

Is that what it is tho? The wastegate opening and closin?

 

thats what everyone says.

 

Someone with a Go Pro camera, can you secure it somewhere under the hood with a light (disposable flashlight LED) and make a video of the wastegate arm at WOT drive? I would do this if I had a camera. Just a quick shot of a run down for 20 sec. It won't hurt the camera if strapped well.

 

^^^^ great idea^^^^

 

4000km still 0 flutter, car is one month old. Does this kick in later on?
or is it a you have it or u dont sort of thing?

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Swift if your car is stock you probably wont notice it, its very minimal. If you get an intake your notice it.

 

It could be the BOV. Maybe it wasn't upgraded when they gained all that horsepower for 2013?

 

Nope its the w/g forsure. I have an upgraded bov and its still there.

My question was is it the wg limiting boost there for a torque limiter

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I have no flutter and I have an intake. It is all in how you hook up the BOV line. 90% of you guys are hearing the BOV not the waste gate even with an aftermarket BOV.

 

I'm tapped directly into the Intake Manifold and I hear plenty of flutter. So how do you have yours connected?

If my HKS was leaking, I'd hear the whistle sound, but I don't. I hear the sound from my intake, and my intake has no recirc hose connected, nor is the port opened on the back of the charge pipe because the HKS is the valve now.

 

If it were the BOV, stock or aftermarket, every single time, then people would be hearing it whether or not they had an intake or removed the silencer in the stock air box. If it was as simple as the BOV fluttering open under boost, people could test it simply by putting stiffer and stiffer springs + shims in it and it should go away. You'll find that for most of us, that's not the case.

Plenty of people have done enough research to see that the flutter in that rpm range is from the wastegate and that it's a product of the way the turbos on the 13s were built. There's a whole 19 page thread that hasn't left the front page of this section for months with a ton of information in it. Everyone thought it was the BOV at first; turns out, it there are other factors at play. Why you don't hear it, I couldn't say.

For the record, I tried multiple ways of hooking up the BOV (for other reasons) and not one of them reduced the flutter sound in that range. Also, my stock BOV *WAS* fluttering right out of the factory, and after putting the new one on that specific sound went away. The wastegate flutter stayed.

I would direct everyone to this thread: http://www.gencoupe.com/2-0t-discussion-2013-up/96383-2013-leaking-bov-video-19.html TONS of good information in there.

 

Thank you a million times over after reading and searching for hours i finally found out wtf that noise is...

thanks

 

Just a thought my wg acuator arm has alot of play in it. You can shake the thing. I wonder if that lack of exact feedback to the position of the arm causes the acuator to rapidly manipulate? It's not a tightly put together arm like say a tie rod end with the rubber . Just throwing ideas. The sound is rather annoying

 

It's just the way the turbo is. You can try to take it to the dealer. They may even give you a new turbo. But the likely scenario is that the new one will have the same rattle in the arm.

I can tell you that the rattle on mine started ~2250 miles, but by the time I hit 5k it was gone. Some others have said it went away as well.

 

im at 6500km, ~4038 miles and its still there. i wouldnt mind the rattle if i could only hear it inside the car but it irritates me so much how people outside can clearly hear it too.

 

^^^ this isnt about the wg rattle. This is about the wg flurter, comp surge sound.

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Reaj2008 brought up the amount of play in with the actuator arm, or in other words, wastegate rattle. 2 different sounds, and yes, the OP is referring to the flutter and not the rattle.

 

so what did u figure out it was? after your research? was it just wastegate flutter? nothing serious?