Re: Where does WG control pressure go ?

[thyrsted2@olsy.dk (Kenn Thyrsted)]

Sorry, my mistake.. 1.6atm.
I removed the entire WG assembly as i am in the middle of a turbo-EM and
whatever replacement "party"; removed the IM-to-WG hose, and applied
pressure to the WG where the hose was.

Kenn

----- Original Message -----
From: Robert Myers <rmyers@inetone.net>
To: Kenn Thyrsted <thyrsted2@olsy.dk>
Sent: Sunday, September 19, 1999 10:55 PM
Subject: Re: Where does WG control pressure go ?


> At 07:58 PM 09/19/1999 +0200, you wrote:
> >Hi, all.
> >
> >Just tested my WG today. As it allready was off i thought this would be
the
> >best time to check it.
> >
> >Did it by applying pressurized air to ctrl-press. intake on the WG.
> >
> >Started at 0bar, slowly increasing pressure. At 1.6bar the WG was fully
> >open.
> >Suppose this is std operation ?
>
> I'm not clear on exactly what you did here.  0 bar?  Do you mean an
> absolute vacuum?  Or do you mean zero bar above the ambient atmospheric
> pressure?  Then would 1.6 bar be on an absolute scale (1.6 bar above total
> vacuum = 0.6 bar above atmospheric pressure) or 1.6 bar above ambient air
> pressure (= 2.6 bar above total vacuum)?  Absolute pressures (relative to
> vacuum) are what are usually used when discussing manifold pressures.
When
> the car is not running the system is at 1 bar,
>
> >The big question is, however , that i can hear the applied ctrl-pressure
air
> >venting INTO the WG, ie into the exhaust system.
>
> To which side of the diaphragm are you adding pressure?  The bottom or the
> top?
>
> >This indicates a torn diaphragm, - doesn't it ?
>
> It depends on exactly what you did.  If the wastegate opens fully at 2.6
> bar (absolute) it would not surprise me at all.
>
> >If it is (torn) , i'd have to buy a new WG , wouldn't i ?
>
> Not necessarily.  The diaphragm is, itself, replaceable.  I have never had
> to replace one but there was considerable discussion on the list several
> years ago.  One member had developed a relatively inexpensive replacement
> diaphragm and was providing them to list members.  The more expensive OEM
> parts are also available (or were then anyway).
>
>
> ___
>    Bob
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