bypass valve

[Todd Phenneger]

FWIW,
  Down at the Monterey Historics, we saw the hood get popped on
the IMSA 200.  Or was it the Trans Am 90 GTO.  Either way, point
is, it had a factory Bosch bypass valve.  Maybe only because at
the time nothing better was available and they changed it at
every pit stop.  I dont know.  But it was there. Heh Heh. 
  That said, a friend just put a Forge Valve and then a Baily
Valve on his ur-S4.  Both gave noticable better and more
consistent boost.  Even on a Brand new TT they made a small
difference. Enough so that they both bought one. :-)
l8r
  Todd

--- Peter Berrevoets <pjberr at home.com> wrote:
> 
> I see your point in the potential for failure in the diaphram
> of this bosch
> unit.
> 
> However, several performance tuners and most notably Dahlback
> Racing in
> their gazillion HP 20V Turbo motor are using this valve. The
> Dahlback in
> fact uses two in parallel and uses quite a bit of custom
> fabrication to do
> so.
> 
> Perhaps there is some merit to using the Bosch valve. I know
> they make good
> products, is it perhaps the method of deployment that is in
> need of
> modifying rather than blaming the valve itself?
> 
> my $0.02
> 
> Peter Berrevoets
> 1990 200TQ
> Toronto, Canada


__________________________________________________
Do You Yahoo!?
Get personalized email addresses from Yahoo! Mail - only $35 
a year!  http://personal.mail.yahoo.com/