Bark/Cough
I have 275's and a EZ also. I noticed the same sound. I read a thread about removing the silencer ring to help release the extra boost pressure created by the turbo. When you back off the throttle quickly the pressure pushes back on the pinwheel in the turbo. With out the silencer ring, the pressurized air can flow back thru the turbo reducing possible barking.
Alan
I have 275's and a EZ also. I noticed the same sound. I read a thread about removing the silencer ring to help release the extra boost pressure created by the turbo. When you back off the throttle quickly the pressure pushes back on the pinwheel in the turbo. With out the silencer ring, the pressurized air can flow back thru the turbo reducing possible barking.
Alan