induction noise gone eerily quiet?

[Urbalizer]

Not sure what has happened, can't really feel any significant performance loss, but the whoosh and sucking of air that i normally hear has gone very quiet and i'm sure its not my ears playing up, only things i have done recently is taken off the air intake manifold and cleaned the air filters which i have done several times before, i have checked everything over several times everything seems to be ok, any ideas what could be going on?
The induction noise is significantly quieter, it is a barely audible hiss now, where is before you could here it from 30 metres away. Very confusing.

[daddysumo]

The intake pipe to the front of the turbo has come off.

[sjc]

It's all that sound deadening you put in!

[TuxMan]

you've still got your ear plugs in ...

[Jenx]

You've sucked in next door's cat?

[Adrian W]

Its the thin air in Cyprus

[GingerWizard]

Jenx said:

You've sucked off next door's cat?

[daddysumo]

GingerWizard said:

Jenx said:

You've sucked off next door's cat?

Not sure that would make the car sound any different ???You might get a screech akin to a slipping belt tho

[Gadgeroonie]

do you have a dump valve ?

is it making full boost ok

Edited by Gadgeroonie on Thursday 24th December 10:35

[Urbalizer]

ye, its making full boost ok, i will check the pipe to the front turbo, also going to take off the air intake manifold see if one of the rubber seals got kinked/trapped or something.

[daddysumo]

Urbalizer said:

ye, its making full boost ok, i will check the pipe to the front turbo, also going to take off the air intake manifold see if one of the rubber seals got kinked/trapped or something.

Check the intake pipes to both of the Turbo's !!

[TrackPredator]

Gadgeroonie said:

do you have a dump valve ?

is it making full boost ok

Edited by Gadgeroonie on Thursday 24th December 10:35

Does the addition of a BOV/Dump valve radically change the lovely induction noises? the chattering and fluttering ?

[JLSELAN]

TrackPredator said:

Gadgeroonie said:

do you have a dump valve ?

is it making full boost ok

Edited by Gadgeroonie on Thursday 24th December 10:35

Does the addition of a BOV/Dump valve radically change the lovely induction noises? the chattering and fluttering ?

no change, since BOV only comes into play at throttle lift off.

[Urbalizer]

Thanks for all the advice, i checked everything over and could not find a problem at first glance, but i knew it had to be something i had messed with just recently, took off the air intake manifold, all ring seals were good, then i spotted it, i had the vaccuum pipe to the BOV going into the wrong chamber, i had put the blanking plate on backwards. Turned it round 180deg and the problem was sorted, doh!

[Gadgeroonie]

so the boost was escaping out the dump valve ?

did you notice a difference in power ?

[Urbalizer]

It was a bit difficult to notice at first but it felt like i was getting turbo lag, i have a very linear power curve as it is, but even so i knew it had lost some kick at mid range, it was feeling too much like a n/a engine, after paying more attention i noticed the boost was down slightly.
So yes it did have power loss.
Feels nice to have the power back after driving two weeks with the problem.