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Discussion Starter #1
Ladies and Gents,

I'm having this concern because I don't know of it's normal or not. I noticed this whistle sound (attached video). It's audible whenever I rev it up then right after I let go off the gas.

Whistle sound

Thoughts?

Thanks a lot!
 

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That is the turbo blow off valve/bypass valve venting back into the intake/atmosphere. Completely normal for turbo vehicles.
 
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If you put a closed top back on filter box you won't hear it.
 

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Thanks a lot! This is my 1st turbo car so generally clueless . 😅
here is a question.

Don't you like the sounds its making? or does it seems like somethings broken?
 

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‘13 Focus ST3, Tuxedo Black
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Ric Flair BOV?
390129
 

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Discussion Starter #10
Installing a good bov will eli
here is a question.

Don't you like the sounds its making? or does it seems like somethings broken?
I don't like the sound because it feels not normal to me.

If putting a bov would eliminate this then I guess I'll get one.
 

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Installing a good bov will eli

I don't like the sound because it feels not normal to me.

If putting a bov would eliminate this then I guess I'll get one.
A blow off valve will not eliminate the noise, it will make more noise.
 

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BOV sound is way different from this one. If I could just make it not sound like this and hear a BOV instead.
You have an RS intake cover which helps in hearing that sound even more. Get a closed cover for the intake and you wont hear much of it, when the hood is closed.
 

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You have an RS intake cover which helps in hearing that sound even more. Get a closed cover for the intake and you wont hear much of it, when the hood is closed.
I suggested the same thing back on post # 3, apparently that is not a consideration.
 
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2016 ST2, Absolute Black, Turbosmart BPV, Dual OCCs, Innovative RMM, JBR Intake & SS Arm, 245/40R18
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Just remove the intake and put a screen over the turbo 🙄😛
 
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