I had my MBC ( manual boost controller ) hooked up, but to day I re-did somethings and now I do not have it hooked up.

The way it WAS ...... the turbo outlet (pressurized side) had a nipple screwed into it and silicone hose went from there to the wastegate and between the 2 I had the MBC


The way the intake manifold side WAS had the boost gague, FMU, and BOV were hooked up together with silicone hose and using "T"'s





The way it IS...... I used the intake manifold side, where the boost gague, FMU, BOV were hooked up and hooked up the wastgate there.

So it goes something like this Intake manifold connects to a "T" which connects to the FMU & boost gague and another "T" which connects the BOV & wastegate


So IF I connect the MBC to the side of the "T" where the wastgate is to bleed air off, won't I be bleeding air to the BOV and the wastgate and the Boost gague and teh FMU?

I know this may be confusing, but it makes sense to me if I did not do a good job of explaining it, let me know I will try and clairify

So my MBC is not hooked up, however the boost is @ 6 PSI now instead of the 4 it was.

I just wanna have another 2 PSI with my MBC.

But thinking about "bleeding" the FMU and the boost gague concerned me.

Thanks

 

I have seen it done the way you are talking about, and it worked perfect. Make sure that you put the mbc after the T, on the line going just to the wastegate though.

This may just get confusing, but think of it as a big circle. Turbo pushing to the intake manifold, where your vacuum line tap is. If there is a loss of pressure there do to the boost controller venting, then the psi would go lower, the boost controller and wastegate would see that, and it would seal up causing the turbo to spool more and provide the amount of boost to the manifold, back through the circle. Now, you are dealing with such a smalll amount of venting from that vacuum line and boost controller, that it will not have to do any/unnoticeably more. If you accidentally had a unhooked vacuum line, the loss of psi is tiny, but not good of course.

 

try, try again

 

Kirk, you are fine. Let me make it clear. The silicone line that was going to the wastegate from the nipple on the turbo. You are going to take the end attached to the nipple of the turbo and move that to the T coming off the intake manifold, FMU, BOV. You want to hook it up there. Might be easier if you get a 5way-T instead of using a bunch of Ts. But doesnt make a difference.

Now there is an advantage to this setup over your old one. The PSI that the turbo was at would be sent to the wastegate before it was actually taking in consideration of the intercooler loss and all. This way you take all the psi loss in consideration and that gets sent to the wastegate. This is obviously of course if you wern't using the MBC. But still dont matter, just leave the MBC where it was on that line and just move it to the 5wayT or whatever you use off the intake manifold.

This is exactly how my setup is. Only thing is you want to cap off that nipple on the compressor side so you aint loosing boost for no reason.

Dixit

 

I tried hooking up the MBC like yall suggested, as soon as I got the car started my Boost gauge was reading 10 hg of VAC.

I test drove it and it was NOT working properly

And yeah dixit the reason I switched it was to get ALL of the wastegate boost before the piping/IC loss

This was ODD. But I am still @ 5 1/2 PSI

 

Im going to have to take a look at your setup when I get a chance. Something is wrong. This should work unless there is something else jacking up the lines.

Dixit

 

Well you know the list.... But yeah I wanna fix it.

I'll call you tonight