Do you HAVE to plug holes on compressor housing and selenoid when installing MBC?

[micus]

ok so im itching to put on my MBC and i know how to now, but im just wondering do i have to plug the holes that are left open on the compressor houseing and the selenoid, the only instructions i can find are for the hallman kit and i just have a MBC with vaccuum hose so im not sure whether i have to plug them or not?

 

[VelocitàPaola]

I would use the port on the compressor housing as the boost source for the MBC. Connect a vacuum line from the compressor housing to the MBC, then connect a second line from the MBC to the wastegate actuator.

As for the boost control solenoid (BCS), bypass it altogether. Don't leave any vacuum lines on it, however, do leave the electronic connections, otherwise you might throw a CEL.

Here's a diagram:

You must be logged in to view this image or video.

 

[micus]

ok so i should use the waste gate actuator and compressor housing as my two lines to the MBC or i should use the wastegate actuator and T into the BOV line?

 

[VelocitàPaola]

Use the compressor housing. The BOV line cycles between vacuum and boost which is useless for a wastegate. Also, by using the compressor housing, the wastegate gets a much more accurate boost signal; which also means better boost regulation.

 

[micus]

ok thank you very much man, i just put it on and dialed it down to 15 psi, the whole thing turned out to be alot less freaky than i thought it would be,