My turbo? Or my motor?
Hey guys I'm new here. I have an issue (or so I think) that may be to do with either my turbo or my motor.
I have a 98 a4 1.8t, I recently installed a cone air filter for performance, and of course for the sound of my dv to be louder. However even though I can here my dv now after letting off at 4000 rpms (a sputtering release, turbo surge I'm sure) there is also a tzzzz sound that I hear right after. I can't tell what it is but I have taken a video and I am HOPING someone can help me. Now I apologize if this issue has already been addressed, and if that's the case modz feel free to direct me in the right direction and cancel this thread. Anywho here is the link to the YouTube vid, I thank you all in advance. |
that sounds like wastegate rattle.
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Originally Posted by tofast2belast
(Post 1429817)
that sounds like wastegate rattle.
Reason I think that is because when the dv blows off its flutters (turbo surge) and literally after the blow off you hear the tzzzzzz |
The waste gate flange plate is right next to the turbo exhaust turbine and before the cat. What DV do you have?
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Originally Posted by tofast2belast
(Post 1429961)
The waste gate flange plate is right next to the turbo exhaust turbine and before the cat. What DV do you have?
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i dont hear turbo surge this is what compressor surge sounds like.
yours sounds like this |
Originally Posted by tofast2belast
(Post 1430096)
i dont hear turbo surge this is what compressor surge sounds like.
compressor surge - YouTube yours sounds like this BMW 335i Wastegate Rattle - YouTube Although in all of this I forgot to mention, Out of every Audi that I've heard on YouTube with a cone air filter you can hear the diverter valve you can hear the blow off when they are taking video at the engine bay when manually revving the motor... But mine you can't, rather tzzzz Say it is compressor, what the diff in compressor vs turbo, what's the worse that can happen, can't imagine it's an easy fix |
Originally Posted by Idoccanada
(Post 1430200)
Hmmm slightly confused. The videos have the cho cho cho sound. But I don't hear the tzzzz sound.
Although in all of this I forgot to mention, Out of every Audi that I've heard on YouTube with a cone air filter you can hear the diverter valve you can hear the blow off when they are taking video at the engine bay when manually revving the motor... But mine you can't, rather tzzzz Say it is compressor, what the diff in compressor vs turbo, what's the worse that can happen, can't imagine it's an easy fix |
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