Ive been meaning to get around to this for awhile now. Ever since I started datalogging my car a few months ago I noticed that I was only hitting 12.9-13.0 psi peak. So tonight I popped my heatshield off and gave the wastegate actuator arm 1.5 turns. Ran a few logs and I saw 12 psi under part throttle a couple times, so I pulled over and loosened the arm a half turn. Boost dropped back down under part throttle, and now Im seeing a peak of 13.6psi. Seems like the car is a bit more responsive down low now too. For any WRX owners that either arent seeing target boost or are getting some wastegate flutter, I highly recommend it.

 

u said this is under the heatshield? and its turned with what an allen wrench?or is it a wrench?

 

Yeah you need to take the heatshield off to get to it. Youll need a 10mm open ended wrench to adjust it. You need to take off the c-clip (I used a flathead screwdriver), then loosen the nut thats on the actuator arm itself. Its the one that looks like its white in the picture. After youve done that just pull the arm off of where the c-clip was holding it and turn. Turn towards the passenger side of the car to tighten and towards the drivers side to loosen. As you can see youll only be able to turn in 180* increments. I left mine at a full 360* turn.

Oh and I dont recommend doing this unless you have a way to monitor boost. Either a boost gauge or datalogs.

 

THANKS NASTY MUCH OBLIGED ALWAYS GOOD TO LEARN NEW THINGS BOUT OUR SUBIES!!!!!!!!NA MEAN!