Adjusting Boost

[DemonTSi at aol.com]

In a message dated 97-08-09 13:14:57 EDT, you write:

<< Not true.  The line which would normally run directly from the
 compressor outlet to the waste gate actuator instead is routed through a
 solenoid, which bleeds off pressure to the air intake side upstream of
 the turbo.  The APC ECU both controls the amount of air that is bled off
 by the solenoid and monitors the resulting charge pressure via a
 pressure transducer. >>

Ok ok...I have been proven wrong again! >HAHA<
Like I mentioned in another post regarding my messup  :)  I was informed that
the Saab system manipulated the pop off valve...which is not a very good way
of controlling boost. If it does use a solenoid to control the amount of air
that goes to the wastegate...then it is basically an electronic boost
controller a la HKS EVC, Greddy Profec, Blitz Twin-SBC, etc...only it is OEM!
Hmmm...so is the APC ECU a separate unit from the car's ECU? 

Van