bypass valve

[Tim Sexton]

One problem... you can run a "dump" valve on the Audi CIS system.  That
air that you would be dumping is metered air.  FWIW, I just finished the
bypass valve installation on my 5kcstq yesterday.  I run 15psi or 2.0bar
absolute and the stock valve works just fine.

Tim Sexton

91 V8 5speed
87 5kcstq
94 90cs quattro sport

On Wed, 7 Feb 2001, Peter Berrevoets wrote:

>   Did you replace the bypass valve with a stock piece?  Or some sort
of
> aftermarket "better" replacement.

I may be jaded here, but "upgrade" bypass/blow-off valves are extremely
popular with the rice crowd, and seem to offer no benefit other than
cool
sound.

There is one exception: if the stock unit is unable to stay closed
against
your high boost pressure an upgraded unit is in order, but most often
the
best "upgrade" is a stock unit off a motor that's designed to a higher
boost level. (Which can often be had cheaply becasue the ricer-owner of
the car in question is going for cool sound..)