MBC and Dual wastegate port

[DammitBobby]

Before anybody flames me. Yes I did a search but nobody covered this issue. I bought a TurboXS MBC and I know how to connect it to a internal wastegate but how do I connect it to a dual port wastegate? I am using a Tial wastgate that has a top port for a boost controller. Should I connect it like it was an internal wastegate or should I connect it to the top port? Dam boost is addictive. I only had this car running one week and I am all ready needing more boost!

[DammitBobby]

Hmm found this on the internet. What do you all think?

Assuming it is set up the same as the Turbonetics WG, and I think mostexternals are, there are two ways to hook up the controller. If you put itin the line as you describe you would leave the top port on the gate open toatmosphere. If you do it this way boost rises more sharply and will tend tospike by about 2 psi. You can also connect it using both the top and bottomports. You run a line from the boost source directly to the side port on thegate. Place a T in that line and run a hose to the inlet of the MBC. Fromthe MBC outlet run another hose to the top WG port. This gives you slightlymore progressive spool and zero spiking and is the way an external WG isintended to be used. Note that in the first case reducing the flow throughthe MBC increases boost while in the second reducing flow through the MBCreduces boost.----- Original Message ----- From: "Mikel" <Mikel at dirtyazn.com>To: <mkiv at mkiv.com>Sent: Monday, May 05, 2003 9:16 PMSubject: [mkiv] External Wastegate vacuum line routing...

I'm trying to setup my innovative external gate and Hallman MBC. I have aquestion about the hose routing. DE's website is kinda confusing in thedirections for routing the hoses correctly to the wastegate.

The way I read it, I should run the pressure source to the hose barb that'skinda in the middle of the wastegate, the straight fitting, as opposed tothe 90° fitting. The MBC should be plumbed into that line, obviously, asit's the signal line.

What do I do with the top hose barb?

Is my understanding correct?

[:: orion ::]

Bottom port ONLY!

Top port is for a fancy EBC...but with an MBC, you modifying the one boost signal the wastegate needs to see..and that's the side port. Don't even take your current line off the WG...Cut your current boost reference line somewhere accessible, splice in the MBC, and be done.

Adjust slowly, otherwise an overboost means DEAD KA.

- Brian

[:: orion ::]

Just to reiterate...LEAVE THE TOP PORT OPEN.

- Brian

[DammitBobby]

I guess you had experience on that one. Thanks

[Red-KAT]

So the side port goes to the same nipple or do I run the side port to the intake mani?

[DammitBobby]

So the side port goes to the same nipple or do I run the side port to the intake mani?

The MBC goes between the side port on the wastegate and the boost source.

[Red-KAT]

Ahh NM I just looked up mine...

You take the pressure from right infront of the TB. Run the line to the wastegate and T it off. Run one to the side nipple and the other to my EBC then to the top nipple...

I have an EBC I did not know it matterd between the two.

But thx for the reply :P

[DammitBobby]

Thanks Orion it worked great! I made the adjustments before I installed it and hit 10 PSI the first time! Seems to boost a lot faster.

[:: orion ::]

Good stuff...

- Brian