Re: bypass valve presure openings

["Avi Meron" <avi@cosmoslink.net>]

Scott, you must be right (about the fittings) since the valve hold a lot
more boost that way.....
Unfortunately the valve lasts (in the correct way) only a few month, maybe I
am running too much boost?......I can not use the set up Erik recommended
since the valve is "way big" and I don' have any space for it (the Euro
lights take a lot of room),
As for your question about the valve, I don't know, I am hopping to order
one in the near future and check it for myself, stay tuned....

Thanks for your comment..
Avi
-----Original Message-----
From: Scott Mo. <scottmo@teleport.com>
To: Avi Meron <avi@cosmoslink.net>
Cc: Quattro <quattro@coimbra.ans.net>
Date: Wednesday, January 28, 1998 1:39 AM
Subject: Re: bypass valve presure openings


>Avi,
>
>Regarding your Bypass valve installation:
>You said:
>> At present time I am using the 102 valve, it does not hold enough
>> boost, pops open at 9 PSI all the time, do you know if the expensive
>> valve 101 can handle more pressure?
>> In the meantime I have the connections reversed, turbo out goes to
>> side outlet not across from the vacuum provision (as it should be), in
>> this way the valve holds more boost....
>
>According to the cut-away diagram in the Audi factory service training
>booklet, "The New 20V Turbo engine for the Audi 200 Quattro" the Turbo
>Bypass valve is shown connected  to the Turbo outlet (boost) using the
>side outlet which is perpendicular (90 degrees) to the small vacuum
>connection. The diagram shows that the boost pressure "should" help keep
>the valve closed. The fitting straight across from the small vacuum
>fitting should be connected to the turbo inlet (suction). The  spring
>inside the Bypass valve is shown to hold the valve closed against the
>suction side.
>
>Do you know if the Bosch 0 280 142 102 valve you are using has the
>fittings arranged the same way as the stock 1991 200TQ 20V Turbo valve?
>(0 280 142 106 I think)
>
>HTH
>Scott Mo.
>