My R32 Sounds Like A Pidgeon...

[rednut]

Gday,

i've got a fairly well modified r32 gtst and when backing off the throttle when boost is between 0 - 5 psi, instead of the usual "pppsssschhhh" noise, i get the pidgeon flutter. Now a mate of mine told me the other day he reckons its bad for the wastegate. He says that my BOV is adjusted way too tight and air is escaping through the wastegate (and making the flutter noise) instead of the BOV.

Firstly, where does the pidgeon flutter noise come from? The BOV, the wastegate or the turbo compressor wheel?

Secondly, is my mate right and that this is actually bad for my car?

I'm no show-pony and not into modifying my car for noises etc so i want whatever is best for my cars performance.

Any advice appreciated...

[TTT]

your mate is both right and wrong.

right = it's because your bov is to tight.

wrong = sound is caused by air going back through the turbo.

wastegates don't make that kind of noise.

is it bad for your turbo?

strong point from both sides of that story..

my view is, there is a factory bov, it idles better with it there, car behaves better.

loosen your bov while the cars is idling until it almost stalls.

then tighten it by one whole turn.

drive it and see ow you go.

if it stalls, tighten some more.