Im upgrading my turbo on the WRX to a Slowboy Racing GT-11 turbo with .60 A/R and the internal waste has been welded shut so I need some help on choosing the correct external waste gate and what psi spring should I go with?
Get the new Grimmspeed 44MM EWG setup with a Tial 44MM EWG. Spring would be whatever is closest to the desired amout of pressure you want to run. I would say at least a 1 bar spring. What Downpipe are you running?