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Old 04-18-2015, 09:23 AM
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Turbo whistle

It would be nice to hear a slight turbo whistle from our Ecodiesel's when taking off from a stop sign or going up a hill. Does anyone know why the turbo's on these are silent? Is their some silencer in-line to take out the whistle? I've never heard such a quiet turbo on a diesel. Almost like it doesn't even have one. Any thoughts?

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Old 04-18-2015, 02:33 PM
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Re: Turbo whistle

Because the mainstream purchasers and the lame stream media want QUIET vehicles - anything that isn't as quiet as the Prius across the street is to loud.


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Old 04-19-2015, 02:40 AM
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Re: Turbo whistle

Under the engine cover are two dense foam noise reducers. Maybe you could see how it sounds with those removed?

Frankly, I hear my turbo whine most when slowing down. I'm always looking around to see where the police siren is coming from and then realize it's me.
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Old 04-19-2015, 08:39 AM
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Re: Turbo whistle

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Originally Posted by akinney View Post
Under the engine cover are two dense foam noise reducers. Maybe you could see how it sounds with those removed?

Frankly, I hear my turbo whine most when slowing down. I'm always looking around to see where the police siren is coming from and then realize it's me.
That will get you more diesel clatter, but won't do anything for turbo whistle. I think they must have something in the intake line to reduce the turbo whistle because I can hear none. All I want is to know if I have one or not driving down the road. I don't by any means want it loud, just to hear it would be kinda cool.
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Old 04-19-2015, 09:36 AM
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Re: Turbo whistle

In Ram Cummins Turbos they had a plastic "swirl" or silencer ring in the intake of the unit that you could remove to really make it whistle. But I'm not sure these are build the same way... I bet there is some kind of silencer ring though....
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Old 04-19-2015, 10:31 AM
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Re: Turbo whistle

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Originally Posted by Stbentoak View Post
In Ram Cummins Turbos they had a plastic "swirl" or silencer ring in the intake of the unit that you could remove to really make it whistle. But I'm not sure these are build the same way... I bet there is some kind of silencer ring though....
I had a 2006 cummins and I preferred the turbo whistle with the silencer ring in place. I had a K&N cold air intake and the turbo would whistle like you wouldn't believe with the ring in. Taking the ring out made it sound out of control and over powering. The ring in was a perfect sound through the cold air intake. Loved it.
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Old 04-19-2015, 07:40 PM
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Re: Turbo whistle

The black plastic tube that the turbo hose joins to (above the radiator) is the turbo silencer. You could replace it with a straight plastic tube.

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Old 04-19-2015, 09:29 PM
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Re: Turbo whistle

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Originally Posted by Benn0 View Post
The black plastic tube that the turbo hose joins to (above the radiator) is the turbo silencer. You could replace it with a straight plastic tube.

I thought that was what that is but can't understand why anyone hasn't removed it or talked about it yet. If anyone reading this has removed the silencer, please comment what you thought of the results. Thanks.
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Old 04-19-2015, 11:11 PM
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Re: Turbo whistle

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Originally Posted by Benn0 View Post
The black plastic tube that the turbo hose joins to (above the radiator) is the turbo silencer. You could replace it with a straight plastic tube.

Interesting! Sounds like exactly the sort of thing someone should look at and take some pictures of! I've found the part number on it - Part # 52014497AB.

Some places have it listed as two parts, Part # 52014497AA and Part # 52014497AB, but I'm not sure which is right. In any case, all we really need is an ID and OD on the pipe to allow us to source some sort of PVC replacement!
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Old 04-19-2015, 11:28 PM
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Re: Turbo whistle

I've read of some replacing it with a pipe on the merc diesel motor (I think it was in the sprinter van).....

I can't remember why they were doing it.....

edit: Ahh, thats right, they were failing under load:
Q. What exactly is this turbo resonator failure problem I have been hearing about on the Sprinter and Freightliner van chassis?
A. A typical turbo resonator failure happens under a period of maximum boost either climbing a hill or accelerating off a stop light with a load in the vehicle. The resonator is made up of injection molded plastic parts which are bonded together. The failure results from the parts separating from each other and allowing turbo boost air to escape from the intake system.
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Old 04-19-2015, 11:32 PM
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Re: Turbo whistle

LOL a grand merc CRD with the resonator delete:
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Old 04-19-2015, 11:56 PM
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Re: Turbo whistle

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Originally Posted by Benn0 View Post
LOL a grand merc CRD with the resonator delete:
I dig it! Our Acura RDX was turbocharged but it never really sounded that good.
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