Ping?

[jjo]

Ok noob question: Exactly how does engine "ping" sound like...?
Just installed a new Wga and boostin pretty nice (17 down to 15)
however I hear this oscillating sound comin from the engine bay whenever
I floor it in third (usually) ....And no, it's not the turbo spooling coz
that sound I know. Thanks guys...!

[Kwik-e-nuff]

possible boost leak due to the increased pressure in the pipes you may have a leak either from you hot or cold side pipe, if u never tighten these now is the time and do a boost leak test.

[Bungles]

Intake flutter?

[jjo]

Intake flutter?
that & compressor surge apparently...! :(