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Internal wastegate noise


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I'm wondering if it is normal to hear a internal wastegate. I've just noticed that I can slightly hear my internal wastegate when I ease into boost from 2500 rpm. Im pretty sure its not compressor surge because the car pulls the same and my boost graphs are rock solid. The only thing I changed with my tune recently is lower the boost and put a grimmspeed tmic on. Im thinking I am hearing it more now because it's working to bleed of pressure to keep boost at my new lower target. It sounds like an external wastegate just very quiet. I have to listen for it with radio off on a perfectly smooth road. Im just wondering if this is normal or if I should be looking into fixing something.

 

Its got a catless 3 inch downpipe with stock catback by the way.

 

Thanks

 

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look up fluttering. should find a solution
Its not fluttering, I hear it when I'm going into boost not closing the throttle. Im 99% sure it is the wastegate that im hearing i just want to know if it is normal to hear my wastegate working like that. I've never heard of being able to hear an internal wastegate.

 

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Boxkita isn't wrong and there are 2 types of fluttering, wastegate & compressor surge. Sound like the noise in the vid but not as loud? If so, it's wastegate flutter. I can hear my wastegate fluttering on my stock VF40 after some mods and tune. It's normal.

 

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Boxkita isn't wrong and there are 2 types of fluttering, wastegate & compressor surge. Sound like the noise in the vid but not as loud? If so, it's wastegate flutter. I can hear my wastegate fluttering on my stock VF40 after some mods and tune. It's normal.

 

Yeah thats the sound, just alot quieter. Glad its normal

 

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WG actuator could be failing. I've seen more than one fail.

 

Sorry for the dumb question, but when my turbo was replaced with a rebuilt IHI one before I owned the car, was a new wastegate actuator included? Or is this something I should have replaced by now at 215K?

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Sorry for the dumb question, but when my turbo was replaced with a rebuilt IHI one before I owned the car, was a new wastegate actuator included? Or is this something I should have replaced by now at 215K?
It most likely came on the new turbo.

 

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If it's working, then it's fine. Sometimes they fail. You'll know it by the sound and lack of boost if it fails, but generally, they last a long time. I check every one with a MityVac and I rarely find one that's NG but it can happen.
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