I purchased a Greddy Profec B Spec II boost controller and while hooking it up I noticed in the instructions they say to hook up a hose from the top of the wastegate to the "COM" port of the valve unit. Now my question is what happens with the lower hole on the wastegate of my wastegate; Do I leave it as is or do I need to plug it. My wastegate is a Tial 44mm FYI.

They only say in the instructions too hook up the other "NC" part of the valve unit to a good pressure source like the turbo housing or bottom of wastegate.

 

Other port on the wastegate and NC should go to a solid VAC source. Many tee off the brake booster or Intake Manifold. You can tee into any VAC that you wish though.

-platinum


Modified by platinum00 at 12:36 AM 10/29/2008

 

your side port should be running to a pressure source (ex: turbo housing like you mentioned) then basically just tee into you current side port line and run a line to NC. top port to COM. all done.