Pressure release sound after engine shuts off

[Javi802]

I have an Sr20 swapped s13 and after running the car and shutting it off i get a weird sound from the exhaust side of the engine.

Cant tell if its from the brake booster or the turbo.

Its the sound you get when releasing pressure from something. Like opening the gas cap on your car, only not as loud or "aggressive" for a lack of better terms.

Might this just be the turbo depressurizing?

Sorry if this is a stupid question. Im new to sr's and i searched but only found people speaking of a "humming" noise coming from the intake side upon shut-off.

Thanks

[!Zar!]

I've heard that noise before.

Never worried about it.

[MrMigs]

Maybe it's from your internal wastegate. Usually, I just blame it on my shoes or whoever else is standing nearby.

[OnTheChip]

It might be the brake booster check valve leaking.

[TheRealSy90]

It's the boost de-boosting.

[blackmags91]

what turbo. yeah its likely just your turbo slowing down

[rwtf]

ive heard the same thing many times with my old s13, but i dont hear it with my rx7 t2 so not sure if its turbo related.

[vickhardeng]

yes,ive heard the same thing many times with my old s13, but i dont hear it with my rx7 t2 so not sure if its turbo related.http://goo.gl/E0iu44

[!Zar!]

ive heard the same thing many times with my old s13, but i dont hear it with my rx7 t2 so not sure if its turbo related.