Re: Got the Blues

[PDQSHIP@aol.com]

In a message dated 96-08-20 14:26:05 EDT, you write:

<< 	That was my understanding also: that the valve dumped to atmoshere
 between the intercooler and the plenum. What the difference between a dump
 valve and a pop-off valve? Ivor was very specific that these were "dump"
 valves, not pop-off valves. Also, which one should one use to eliminate
those
 nasty pressure spikes when the thottle gets slammed shut and where should it
be
 located?
  >>
Well, the difference is that a pop off valve is a valve that opens at a
preset pressure to prevent too much boost while ON THROTTLE.....  A "dump"
valve opens regardless of turbo pressure, while OFF THROTTLE or specifically
CLOSED THROTTLE.....   So a dump valve is the one to use for throttle shut,
the pop off valve for not overspinning the turbo, which is really taken care
of by the WG these days......

HTH

Scott