BNR S3 with Cobb EBCS

[nebolskeetskeet]

So, I have been trying to diagnose some issues, but have come across something that doesn't seem to be right.

My MS6 has a BNR S3 turbo and a 3-port Cobb EBCS, and I have a question about how the EBCS is installed. Currently the turbo has a line connected to the port on the compressor side, and is plumbed to the lower port on the wastegate (similar to the image below).



On Cobb's EBCS Mazdaspeed installation page, they state to cap both ports (shown below).



I have a rich at idle issue right now, but my radiator recently developed a leak. I am waiting for my new radiator to come in, but am trying to diagnose as much as possible while the car is torn apart.

It seems obvious to me to fix it, but I just want to make sure everyone agrees.

Link to Cobb's instructions: https://cobbtuning.atlassian.net/wik...ntrol+Solenoid

[Fstrnyou]

Pics aren't showing up for me...

There are only a couple ways to route it for it to work properly and many ways that won't work properly.

Search google for 3-port EBCS hose routing and see if yours looks like one of them.

[nebolskeetskeet]

That’s weird. The images I added are in the link to Cobb’s site in my original post.

I basically added the first two images underneath “Cobb EBCS Installation” in the provided link.

[Solarsurge]

Proper 3-port routing should be:

Turbo Inlet Pipe > EBCS Port 1 (right port)
Compressor Port > EBCS Port 3 (middle port)
Wastegate Port > EBCS Port 2 (left port)

Intake Manifold > BPV Port (factory routing)

Also worth mentioning that you want to keep the SHORTEST route possible for all hoses. Don't mount your EBCS halfway across your engine bay and run 3 foot hoses. I'd say try to keep your hoses less than 1 foot if possible.

[Solarsurge]

Originally Posted by Solarsurge Proper 3-port routing should be: Turbo Inlet Pipe > EBCS Port 1 (right port) Compressor Port > EBCS Port 3 (middle port) Wastegate Port > EBCS Port 2 (left port) Intake Manifold > BPV Port (factory routing)

Am I being punked? Do I need to diagram this for you? Here...

TIP =====hose===== EBCS 1
COMP =====hose===== EBCS 3
WG =====hose===== EBCS 2

IM =====hose===== BPV



Sent from my iPhone using Tapatalk

[nebolskeetskeet]

Originally Posted by Solarsurge Am I being punked? Do I need to diagram this for you? Here... TIP =====hose===== EBCS 1 COMP =====hose===== EBCS 3 WG =====hose===== EBCS 2 IM =====hose===== BPV Sent from my iPhone using Tapatalk

I get your routing.. but my question still stands about the second port on the wastegate. There are 2 ports on the wastegate, 1 that goes to the boost controller, and the other that used to be plumbed to the compressor port. Your routing doesn’t mention what to do with the second port on the wastegate.

I appreciate your help and I do understand what you are saying lol. So thanks you guys for your time. I am just trying to make sure everything is installed correctly.

[Fstrnyou]

Avoid mounting it to the firewall unless you want to hear it clicking.

[Solarsurge]

Originally Posted by Fstrnyou Avoid mounting it to the firewall unless you want to hear it clicking.

Maybe I want to know it’s working


Sent from my iPhone using Tapatalk

[nebolskeetskeet]

So you guys agree that the compressor port and bottom port of the waste gate should be capped?

I went ahead and capped them and now I have a tee running off of the bpv to port 3, port 1 to tip, and port 2 to wastegate.

[Solarsurge]

Did you read what I wrote at all? lol

NO. You don’t cap them. You run 1/8” ID hoses in the manner I indicated. Stock EBCS only has two ports. That routing is to replace the stock EBCS on a 2 port stock setup. Your turbo is meant to be run in 3 port mode.


Sent from my iPhone using Tapatalk

[nebolskeetskeet]

Originally Posted by Solarsurge Did you read what I wrote at all? lol NO. You don’t cap them. You run 1/8” ID hoses in the manner I indicated. Stock EBCS only has two ports. That routing is to replace the stock EBCS on a 2 port stock setup. Your turbo is meant to be run in 3 port mode. Sent from my iPhone using Tapatalk

I did read your post. You never mentioned what to do with the second port on the wastegate. As fstrnyou stated, I corrected the routing to be consistent with cobb’s instruction.

[Fstrnyou]

OP's routing is per Cobb's instructions for 3-port setup.

[Fstrnyou]

Not to start a whole new discussion on boost source, but I use the stock EBCS boost source (compressor housing). It's a lot less hose and the source pressure should be higher there which I think would make a faster reacting wastegate.

[Solarsurge]

Originally Posted by Fstrnyou Not to start a whole new discussion on boost source, but I use the stock EBCS boost source (compressor housing). It's a lot less hose and the source pressure should be higher there which I think would make a faster reacting wastegate.

Precisely why probably every other EBCS maker recommends my routing in their instructions and nearly all modded Mazdaspeeds are hooked up that way. I honestly don’t know why Cobb is so extra with their routing. It makes no sense.


Sent from my iPhone using Tapatalk

[Fstrnyou]

Route as described. Either way, I don't care. Cap off any unused ports.

[KamloopsDan]

This is how mine is setup on my BNR S4.