Hey oh, another question while trying to put my car back together.
For referance my car needs to pass emissions, so I'm trying to keep everything related to that. I'm also running non-sequential stock turbos, and an FFE fuel system (new rails, injectors, pressure regulator, etc.)
I'm putting the rats nest back in and it's a bit of a headache. I'm trying to figure out what I can remove and what I need to keep. I've attached a drawing and highlighted the solenoid that I think I can delete... green for keep, red for delete. Also wondering if I can remove the vacuum and pressure chambers. Can I also tie together the OMP injector vents with the wastegate control with a tee to remove the block that they share with the turbo pre control (not sure why I couldn't).
Basically trying to simplify everything a bit and make room to run my fuel lines.
Thanks again in advance!

 

Are yo still running stock ecu? Are you RHD or LHD.

 

Magenta = boost
Purple = Vacuum

You'll need the vacuum chamber. I don't know about the pressure chamber since it looks like it only controls the 'turbo control,' which you don't need since the flap in your exhaust manifold is gone for the non-sequential setup. It looks like you have a couple of solenoids that still need vacuum, such as switching and double throttle.

It sucks you can't just connect solenoid G (double throttle) and solenoid C (switching) directly to the manifold since the manifold isn't always in vacuum after boost. It seems that the multiple check valves (the magenta ones) help collect vacuum and prevent boost (positive pressure) from entering. They store the vacuum in the chamber when you are in boost. You pretty much have access to vacuum whether you are in boost or not because of the vacuum chamber. It's important to keep that.

 

After some digging around on the forums to confirm, it seems like you can tee into any of the cyan hoses.

 

Perfect! Those cyan lines were what I was hoping I could tie together since it looks like they already do tie together via the metal manifold right below I and J. I wanted to eliminate the manifold so that I have room for my FPR.

This is super helpful, the diagram is kind of hard for me to follow since I'm color blind. It's good to know why the systems are there, and it makes sense to keep the vacuum chamber, I wonder if they could be tied together and plumbed in pre-turbos on the intake, that should always be in vacuum too, but maybe too much vacuum in boost

Left hand drive, running an Haltech Elite 1500

 

I can redo the diagram for you. What colors can you see? And no, they can't be plumbed together pre-turbo because pre-turbo only sees a very small fraction of vacuum, as true vacuum is post-throttle body butterfly. Vacuum is created by restriction, and the only restriction in your pre-turbo elbows is your air filter. The solenoids connected to the manifold you're trying to remove don't need much vacuum to operate.

 

Let me know if you still can't see the colors, I tried using colors most people can see.

 

Thank you for that! I can usually see most colors if they are separated out, but I'm mostly blue/grey/green/brown/red blind. If any of those colors are near eachother, I can't tell them apart. I can generally see brighter colors like cyan, yellow, bright green etc. unless cyan is near light grey, then they wash out to grey
This has all been very helpful and I think I can move forward with this now.