Re: Fw: Blow OFF!!!

[QSHIPQ@aol.com]

In a message dated 97-06-17 23:27:19 EDT, you write:

<< it all prevented me >from buying the 1.5" tube.   I also figured that
 since
> the wastegate only flows gas when I'm >off the throttle, there was  plenty
> of room in that 3": sewer pipe for a measly wastegate.
 
> I thought it was the other way around!  I thought the wastegate flowed when
> it was opened by the exhaust pressure reaching your maximum boost, or by a
> computer sensing same.  So your little second pipe *would* be relieving
some
> pressure from the big pipe at it's most extreme use.
 
> Was I wrong all this time?
  >>
Graydon,
Huw is correct.  The wastegate operates during boost, not when throttle is
closed.  When the throttle is closed, there is no exhaust pressure to
activate the WG.  That is a blow off valve (pre t-body) or Bypass valve
operation.  Hence my argument regarding turbulence to Ross.  If you take the
turbulent air OUT of the downpipe during full boost, you have a better
airflow in that pipe.  And "faster" quarter mile times to boot (prolly 3
seconds or so, yea right:)

HTH

Scott