Help with Apexi BOV

[Mjavant]

Ok i have the apexi twin chamber bov on the car right now. After months of searching (literally) i cannot find any information about this bov other than most people hate it cause it only vents to the atmosphere, and how to hook it up which i have the diagram it came with. Ok, look at the diagram below and ill try my best to type out whats going on here.

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The BOV had three nipples the two on the side which are supposed to just be hooked to each other and the one on the bottom that goes to the intake manifold. So the vacuum lines coming from the underside of the intake and the boost solenoid are T'ed into together and connected to the two nipples on the side of the BOV. Now this works somewhat well as it doesn't stall and it holds boost exactly where it is set with no creep or anything.
I have tried hooking it up the way Apex-i says to do it, and i hit nearly 20lbs with a little fuelcut and changed it back the way it was. Any and all help is appreciated fellas.

 

[SlickPyro]

I'm kinda confused as to what your question is. I understand that you hooked it up using apexi's instructions. Are you saying that you hit nearly 20lbs of boost and let off the gas and the bov didnt open when you had it hooked up the way the apexi instructions showed? So you changed it back to the way you had it hooked up yourself and it operates properly? Also maybe a real picture would help cause that diagram is throwing me off too. I think the bov should only have one nipple. I know the 1g bovs and greddy type rs have only one and I think it goes to the intake manifold.

 

[No_Skillz]

I'm not sure how the Apex'i BOV is configured, but the line going from the intake manifold to the BOV has to attach to a nipple that is ABOVE the diaphragm. I'm not sure what the other two nipples are for since I've never inspected one of those. However, I'm a bit confused by your diagram. Are you running a boost controller (since you mentioned setting boost)? If you are, your boost solenoid shouldn't need to be connected by any vacuum lines. There also should not be an interrupt between your MBC/solenoid and wastegate (which is probably what is causing uncontrolled boost).

And... why are you running this overly complex unit and venting?

 

[Mjavant]

Sorry about the confusing about the picture but im not an artist and thats the best i could do.
Ok to answers the questions, no i have no boost controller on the car but the way it is setup now it runs 10lbs solid and holds there all the way to redline. The way Apex-i says to hook it up is to just hook the bottom nipple to the intake mani and connect the two on the side together with the rubber hose i got with the BOV, the reason for this is, is because its a twin chamber and uses the pressure in one chamber to keep the other closed. I did just that but with no boost control solenoid hooked to it the boost climbed to nearly 20lbs then a little fuel cut and i backed off took it back home and changed it back.

Edit: the line from wastegate to solenoid is uninterupted, also the bov does actually work fine its just really weird how its hooked up just wanting some advice on what to try that could be better other than throwing it in a lake and get a 1g put on

 

[No_Skillz]

Sorry about the confusing about the picture but im not an artist and thats the best i could do.
Ok to answers the questions, no i have no boost controller on the car but the way it is setup now it runs 10lbs solid and holds there all the way to redline. The way Apex-i says to hook it up is to just hook the bottom nipple to the intake mani and connect the two on the side together with the rubber hose i got with the BOV, the reason for this is, is because its a twin chamber and uses the pressure in one chamber to keep the other closed. I did just that but with no boost control solenoid hooked to it the boost climbed to nearly 20lbs then a little fuel cut and i backed off took it back home and changed it back.

From what I understand so far, it seems like you need 2 pressure sources for this BOV. One from the intake manifold (standard) and one from a pressur source close to the turbo. In addition to the compressor cover -> wastegate, you will need a total of 3 pressure sources. You already have the compressor cover and intake manifold sources on your car from the factory, but you'll need to figure out another place close to the turbo that you can tap.

just wanting some advice on what to try that could be better other than throwing it in a lake and get a 1g put on

Throw it in a river and get a 1g put on.

 

[Mjavant]

Throw it in a river and get a 1g put on.

Thanks, yea i think ill just cut that bastard off and put a 1g on