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A3 FSI-DSG Exhaust Note

  #1  
Old 10-13-2005, 03:33 AM
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Default A3 FSI-DSG Exhaust Note

When I had a test drive the other day, I noticed small "puff" sound came out of exhaust pipe every time I changed the gear.
Does anyone notice this sound or cause of this ?


 
  #2  
Old 10-19-2005, 07:13 PM
Join Date: Mar 2005
Location: Arlington Heights / Chicago, IL
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Default RE: A3 FSI-DSG Exhaust Note

i heard the same thing when i was test driving one...

weird.. hopefully it's just due to a restrictive stock exhaust system... and we all know they can't stay stock for long!!



 
  #3  
Old 10-20-2005, 01:19 AM
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Default RE: A3 FSI-DSG Exhaust Note

are you ref. to the diverter valve sound, sort of sounds like a blow off valve? If thats not what you are ref to the only other thing i can think of is the "burp" that goes from the exhasut when decel.. "Puff" to me is reserved for something that i wont mention here
 
  #4  
Old 10-20-2005, 06:11 PM
Join Date: Oct 2005
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Default RE: A3 FSI-DSG Exhaust Note

I believe this is caused by the system letting off the gas slightly as it shifts and reapplies it when the shift is completed. This is done for smoothness.
 
  #5  
Old 11-05-2005, 11:10 AM
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Default RE: A3 FSI-DSG Exhaust Note

It is the waste gate opening to let off the turbo pressure.
 
  #6  
Old 11-06-2005, 03:23 AM
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Default RE: A3 FSI-DSG Exhaust Note


ORIGINAL: ronaldvetteron

It is the waste gate opening to let off the turbo pressure.

Eureka!! Thanks! [8D]
 
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