Re: wastegates: S4 vs MC 10v

[PDQSHIP@aol.com]

In a message dated 96-10-31 19:48:32 EST, you write:

<<        Just wondering what the difference is beteween the the two systems.
 or is there any at all????
 
         thanks, BOB
 
  >>
The wastegate is the same, the operation of it is different....  The MC adds
boost via the wg freq valve (from behind t-body to top of wg to intake of
turbo), effective spring pressure is added or not.....  The S4 uses a tap on
the cold side of the turbo and the computer adds or subtracts the amount of
pressure that reaches the bottom of the wg, spring pressure is constant....
 The top nozzle is open on the 20t/q systems..... So the "control function"
is diffferent the design is not...

Scott