blowoff valve questions

[Bruce Bell]

In at least one of the Pikes Peak S1 cars, Audi used a very large
"bypass valve" from which air was routed to a special manifold
attached to the exhaust manifold flange. Each exhaust runner
fired as its exhaust valve opened releasing the rich mixture
caused by the metered air being diverted. Can you say Zero turbo
lag?  I could make pictures available if any one is interested.

Bruce

> -----Original Message-----
> From: quattro-admin at audifans.com
> [mailto:quattro-admin at audifans.com]On
> Behalf Of Dave Eaton
> Sent: Monday, June 18, 2001 3:37 PM
> To: quattro at audifans.com
> Subject: RE: Re:blowoff valve questions
>
>
> a lot of the rally cars blow flame because they are
> dumping raw fuel into
> the turbo using a special injector.  this keeps the
> turbo spinning - called
> an anti-lag system.  usually accompanied by a
> machine-gun-like sound.
>
> dave
> '95 rs2
> '90 ur-q
>
> -----Original Message-----
> From: "Jukka Majanen" <jiipm at sci.fi>
> To: "Audi" <quattro at audifans.com>
> Subject: Re:blowoff valve questions
> Date: Mon, 18 Jun 2001 22:46:03 +0300
>
> Ok -that is possible, but in my opinion ( and the
> local rally people too )
> mass
> and energy of that routed air makes it only
> theoretical? So You can see all
> WRC and smaller cars blowing fire, because of the rich
> mixture in pipe.
> That small blow spools turbo while the B/P is open out
> and the throttle
> closed.
> Also there is something rich allready, when the
> throttle again opens...
>
>
>