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 ?

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!! ;)

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 ;)

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.

RE: A3 FSI-DSG Exhaust Note
 

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

RE: A3 FSI-DSG Exhaust Note
 

Eureka!! Thanks! [8D]