Silencer Ring removal - why?

[LRutigliano]

Why do you guys remove the turbo silencer ring?



When I did a search and looked at pics of the ring installed vs. no ring, it appears to me that the ring actually helps guide air into the turbo impeller. The ring has a nice 45deg chamfer that guides the airflow smoothly into the turbo wheel.



With the ring removed, you can see the impeller housing gussets and ribs and to me it seems that you would be adding turbulence to the air entering the impeller. I would think you would want to guide the air in as uniformly as possible.



Is it being done for a "cool" noise only benefit?

 

[JustinClark]

The cool benfit is my only reason.

 

[Salt Dog]

The only reason and it would be nothing to write home about is the spooling of the turbo... . singing like a banshee. I feel a small improvement though.

 

[steved]

I've removed the SR from several of my trucks... seemingly without any benefit, it even seemed to cause my 99 auto to spool faster.



However, I removed it on my 2004. 5, and saw a very slightly decrease in the mileage I got driving around town... around 0. 25mpg drop. The highway mileage remained unchanged.



I currently have my SR installed for that reason...



steved

 

[TurboFan]

Silencer ring removal causes a smile to appear.

Yes. It sounds cool.

 

[CDonaldson]

I left my SR in when I installed the cool blue hose. I had the same observations with regard to it acting as a guide to focus the air into the turbo. My thoughts also included the fact that the air was more of a mid balance against the blades rather than pressure against the outer edges of the blades, which woulld result in a lot more stress to be focussed on the bearings.



While the 'sound' might be apealing, over time it could actually shorten the life of the bearings and also affect the blades/blade angles themselves.



CD

 

[SKneeland]

if you do a search, you may find some dyno testing done by a member using several different aftermarket intake kits, with and without the silencer ring. if i remember correctly, every single one benefited having the ring removed, ever so slightly mind you, but it was an improvement.



mines gone, if u dont like the noise leave it be, its not that great of an improvement to annoy yourself over.

 

[USMCBay]

I have removed the silencer from two 12V and two 24V CTD's - I like the Turbo whistle but haven't noticed a performance change.



However I did install a 70hp Chrome Dipstick and that made a huge difference. :-laf

 

[nickleinonen]

my charger barks less [practically none] with the ring out, with the ring in, it barks when getting off the throttle quick under load

 

[KYachovitz]

Silencer ring removal causes a smile to appear.

Yes. It sounds cool.

I agree.

 

[JDiepstra]

Like everyone said - turbo whistle is cool.

 

[dseabaugh]

had a singing turbo in one of my dump trucks years ago.
Excavators were always telling me how they liked hearing that turbo sing while they loaded my truck. Helps make the day go better.

 

[Highfinance97]

my charger barks less [practically none] with the ring out, with the ring in, it barks when getting off the throttle quick under load

Others have also claimed this and a small power increase


Michael

 

[Forrest Nearing]

wow, this still hasn't been put to rest?!



the ring DOES NOT "guide the air"... it silences the noise. It actually, slightly REDUCES the turbo's efficiency. On a very mild truck or one with a large enough turbine housing, the difference will be un-noticed/un-quantifiable.



You folks realize that the compressor wheel is able to pull air from the MWE slot, right? With the silencer ring in place, you are not guiding the air flow, you are severely hampering the air flow to the MWE slot

 

[Forrest Nearing]

my charger barks less [practically none] with the ring out, with the ring in, it barks when getting off the throttle quick under load

it barks less because the MWE slot is able to do what it is designed to do and allow surge air to properly bleed without impeded flow (by the ring)

 

[TMarszalek]

There's nothin' better than the sound of an F22 Raptor taxiing for take-off! An MIA silencer ring is close!

 

[rbattelle]

it barks less because the MWE slot is able to do what it is designed to do and allow surge air to properly bleed without impeded flow (by the ring)

Okay, Forrest, this makes a lot of sense. Except the part about "MWE". What the heck does MWE stand for?

But if the MWE slot bleeds excess air, wouldn't it be doing so into the intake plumbing? Seems like that might damage that rubber hose, or the filter at high boost.

Isn't it true that this turbo on non-Dodge applications has no silencer ring?

Ryan

 

[Forrest Nearing]

Map Width Enhancement



designed to cut down on surge. Definately won't damage anything

 

[rbattelle]

Map Width Enhancement
designed to cut down on surge.

Okay, I took a moment to look at some photos of what's behind the silencer ring, and your argument about "MWE" doesn't make sense to me anymore.

Where did you hear that those slots are part of the compressor flowpath? They look completely blocked to me.

The slots are around mid-span on the compressor blades, so they cannot possibly permit air to bleed from the compressor.

And if they were connected to the compressor volute (as would be required to bleed excess air as you suggest), they'd bleed excess air all the time unless a valve were provided. We know this isn't the case.

I'm not convinced those slots have any function at all.

Ryan

 

[Forrest Nearing]

they bleed air that is taken in by the compressor wheel that the engine isn't able to accept (surge)



but, it also allows the compressor wheel to pull more air than without in some circumstances



I'm curious why you think they exist and what they do?