Went to my tuner yesterday. Had them install the grimmspeed 3 port. Port 1 the intake port the left open and venting and capped off the cobb intake its self. Is this normal? Any advantage / Disadvantage ?? Made 360 corrected on a dyno jet btw

 

I believe the 3rd port is used for an external waste gate. SOmeone else correct me if im wrong.

 

1 - compressor side of turbo
2 - wastegate
3 - intake

That's how I have mine setup. Not in that order since the ports are named 1-2-3

 

The one that goes to the intake is just a vent. No reason to connect a line or do anything with it, it just needs to be open so it can bleed off your excess boost pressure.

 

no need to connect the intake side.

 

While this diagram is made for a slightly different setup, it should answer your question!

 

http://www.grimmspeed.com/content/in...ne_version.pdf




4. Hook up vacuum lines to the GrimmSpeed BCS. You will be removing the 2 factory vacuum
tees. See Figure 2. Port 3 connects to a high pressure boost source (there is a vacuum nipple
on the turbo compressor outlet). Port 2 connects to the internal wastegate actuator vacuum
nipple and Port 1 should be routed back to the intake (where the factory BCS mounts). It is
recommended that a plastic zip tie is used to secure vacuum lines. The electrical is plug and
play with the supplied connector. Tuning: WGDC controls the actuator / turbo. Tuning to the
WGDC is required (approx 30% reduction in WGDC)