I have an ETS twin scroll turbo kit that has the vacuum lines routed per my crude diagram below. Is there any chance this has an issue, or is it fine? Other than having a lot of things plugged into the pressure source, I'm not sure I see a problem. I'm pretty sure the intake manifold should be seeing the same pressure as the other pressure lines shouldn't it? Regardless, please let me know if there's anything wrong. I have a problem I need to sort out so I can move forward with my tune and need to rule this out or fix it before I can move on. Thanks in advance!

 

The BOV needs a dedicated line.

The boost gauge sensor can't be on the line for the boost controller because that line may have less pressure due to the solenoid bleeding air to the waste gates. Also, the wastegate solenoid needs a pre-throttle boost source, IE the fitting on the compressor housing.

The boost gauge sensor can be tee'ed into the line for the BOV.

 

I have a GT35R, so no compressor vacuum source. I’m going to order a bolt on vacuum fitting that can be bolted into the soft hose exiting the compressor housing to use as the pressure source. Will peel off the BPV and boost gauge separately on the line from the IM.

Great feedback. Thank you!

 

You can drill and tap the compressor housing for an NPT to hose barb fitting. Or have a ping bung welded to one of the charge pipe to thread a fitting into.

 

I ended up ordering a vacuum fitting that I can tap into the soft hose exiting the compressor (boost only). I'll run that as the reference to the EBCS. I'm running the BPV off intake manifold and T connector to the boost gauge. The tuner has asked me to run the standard config from GrimmSpeed, which has one port to WG. Top port on WG VTA, one port off EBCS to air intake, and the final EBCS port to the boost only source.

Really appreciate your feedback. I'll post another diagram of the final config for feedback soon.