Couple of things !

[C. J.]

Right had a clear up in the garage and came across a bit of boost tube with the brass restrictor !
Which tube off the three port valve should it be in
Second thing thinking about going back to OE exhaust headers to up the spool !
whats poeples thoughts for 400 bhp on OE headers

[Scott.T]

Restrictor goes between the turbo nipple and the T-piece if you are still running a 2-port.
But I expect yours may of been converted to a 3-port boost solenoid and hence the plumbing is different and doesn't require the restrictor.

Standard 2-port plumbing :
turbo to T-piece (restrctor in pipe)
T-piece to Actuator
Bottom branch or T-piece to Boost Control Solenoid
Then Boost conrol solenoid to inlet manifold (the little black elbow just to left of main induction hose).

3-port plumbing :
turbo to Boost control solenoid (top port if OE 93-96 style solenoid)
Middle Boost Control Solenoid to Actuator
Bottom Boost Control Solenoid to inlet manifold (the little black elbow just to left of main induction hose).


re : headers, ported OE should work. It may improve midrange torque but loose a little top end.

[2-jaffacake-tone]

A set of my ported headers have seen over 400bhp . not sure on spool up might be able to get a gragh if he still has it .
what size is your up pipe? maybe go smaller?

[C. J.]

Originally Posted by 2-jaffacake-tone

A set of my ported headers have seen over 400bhp . not sure on spool up might be able to get a gragh if he still has it .
what size is your up pipe? maybe go smaller?

Would be good if you could get a graph
Have not got a clue whay size it is but will fimd out in a couple of weeks !
Picking a sti up pipe up on sunday and have two thoughts
One is to port the oe headers in the garage and use the sti uppipe and the other is to cut the two bolt flange off and put a three bolt one on it and use the tubulars that are on it know
Any thoughts

[DukeBoy]

What are you looking to gain from this? is it just a quicker spool you want? whats it spool at now?

[C. J.]

Originally Posted by DukeBoy

What are you looking to gain from this? is it just a quicker spool you want? whats it spool at now?

Yep spool as 1bar is not till 4250rpm
Happy with the power /torque to the fact that i may stay 2l and forge it up over the winter