Fwd: UrQ Blowoff Valve

[QSHIPQ@aol.com]

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Forwarded message:
Subj:    Re: UrQ Blowoff Valve
Date:    97-11-13 14:51:52 EST
From:    QSHIPQ
To:      afinney@tamsconsultants.com

In a message dated 97-11-13 14:25:32 EST, you write:

<< Scott, as always, an informative post. The only question I still
 >have, that no one has answered, is it bad to dump the boost
> close to the air plate? There is no easy way to create a nipple
 >to receive the dump in the line between the air flow plate and
 >the turbo inlet unless 1) you tap the aluminum cover attached
 >to the top of the air box and flow plate or 2) you add a tubular
 >spacer, maybe from Spearco, into the line and tap this. I don't
> want to start cutting the accordian hose between the air box
> and the turbo inlet 3) tap the small metal right angle "hose"
> that connects the accordian hose with the turbo inlet. Anyone
> have any thoughts here?  >>
>83 Urq
Keeping it closed loop is best, so anywhere downstream of the airflap is
fine.  Given the forces of pressure/vacuum here, the airplate position might
lower slightly with the dump valve boost spike, but I don't see it as a
threatening issue.  IN the later cars this doesn't apply at all, cuz there is
a flap bypass (decel valve) that sits in the airboot anyhow.   I have seen
them in the hose going to the turbo, in the turbo inlet rubber elbow (btdt
using plumbing parts) or in the case of the Ur, in a pipe between the airboot
and the inlet.  This is a really basic muffler shop kinda mod here, don't pay
too much for it.  Doing the mod is the key.   Just about ALL turbo cars since
89 (prolly save audi) use a bypass valve, it is a simple effective and really
cheap dumb device for extending turbo life and increasing throttle response.

HTH

Scott