I have a 93 wrx with a 3 port solonoid boost valve is there meant to be a restrictor in any of the lines . if yes where should it go what size restrictor goes in , what difference will i notice as it runs okay at the moment , just heard people on here talking about restrictor sizes.

thanks

Mark

 

"If" there is a restrictor fitted, it will be in the small rubber pipe which links over to the Turbo Wastegate control diaphragm. It will be in a small link pipe, close to the "tee piece", normally identified by a painted "dot" on the pipe itself, to show its location. it can vary in size from 1.5mm down to 0.8mm, dependent on how engine has been setup, so no real certanty on diameter on your own car, sorry.

 

Was there a restrictor fitted to the early wrx's or was it later cars , there was a brass connector in the manifold to boost solonoid pipe looked like somone had put it there after removing boost gauge possibley , i removed this and connected my boost gauge here ????


Mark

 

T-piece on a 3-port? I thought that was only on a 2-port?

 

That is what i thought just checking

Mark

 

Factory 3-ports do not have a T-Piece, scoobyslut.

My restrictor was in the bottom pipe (to induction system) but that may not be right as mine had awful boost control.