Wastegate Solenoid

[Paul Clark]

One hose goes to a "Y" which branches off to 2 different places.
That makes 6 places where leaks/blowoffs could occur.
If the solenoid had the restrictor already built into one of the fittings, there would only be 4.
Why didn't Buick do it that way, and why are there 2 fittings on the solenoid since you only use one of them anyway?
Just random thoughts after a few brews.
Thanks

 

[pacecarta]

the restictor is between the compressor outlet and the wastegate actuator .
putting it on the wastegate solenoid would allow the line between the compressor and wastegate actuator to be direct without the restrictor and lower boost would occur

putting the restrictor on the wastegate solenoid would also limit the ability of the wastegate solenoid to raise boost , it needs to bleed off air from the compressor to lower the pressure getting to the wastegate actuator in order to raise boost

http://www.gnttype.org/maint/quickref.html

 

[Gary Wells]

Also, putting the restrictor in the wastegate would make for a very expensive restrictor. There are at least three (3) different sizes of restrictors, so if you are on the borderline of too much or too little boost you might try a different size restrictor, but it would be better to find out why you have too much or too little boost rather than bandaid it. 1 restrictor for turbo Buicks, 1 for TTA's, & the other 1 I don't remember what it's for.