[Serdar-S60T5]

hi everyone.
last night i noticed a strange sound coming from outside the cockpit right after i pulled my foot off the gas pedal.
i stopped and tried again. from a standing start, dtsc on, i gave it half throttle, got it up to around 4000-4500 revs and then suddenly let it off without touching the brakes or anything, and right after i let it off, i hear a loud and strange echoing wooooshh.

i suspected the turbo hoses but the car is still pulling as good as it was before. so i'm guessing it shouldn't be a boost leak, but i'm not sure. what do you think?......

 

[Bender]

that is the turbo releasing... perfectly normal and prefered by many

 

[Serdar-S60T5]

Re: (Bender)

really?
actually it started just yesterday.

and now, the more i listen to it, it sounds more like a "khoooshh" rather than a "whooshh" and it becomes louder and more obvious if i let off at around 3000 revs where the turbo is just kicking in - but can't really totally kick in because i'm suddenly letting it off just then... it sounds like a valve closing and air being forced or something. do you think it might be the dump valve ?

 

[phuz]

Re: (Serdar-S60T5)

its definitely your recirc. valve. and it didn't start yesterday

you just started HEARING it yesterday

the intensity of the volume is completely dependent on how much boost you have built up by the time you release it.

 

[Serdar-S60T5]

Re: (phuz)

by recirc, do you mean the dump valve?
so you don't think it's broken or anything?

 

[Austin]

I took my airbox off & swapped it for an aftermarket cone filter. it does the noise all that time now :0).
It used to do it with the stock airbox too, when the cold air inlet pipe had fallen off. it's alot worse when it's cold.

 

[phuz]

Re: (Austin)

Quote, originally posted by Austin »

it's alot worse when it's cold.

...and by worse do you mean louder?

its not having a negative affect.