https://www.evolutionm.net/forums/sh...an+mbc+install

Ok, conjuction to that post, I'm planning on installing my MBC tomorrow. (Thank you Sara!!)

Now, I've gathered some research and I have made this diagram from what I've seen in some of the threads (the yellow paper diagram).

Let me know if this looks right.

EDIT: found out where the restrictor pill is. The bottom green part needs to be removed completely out and use the new hoses. and save the restrictor pilled hoses for later.

Thanks.

 

looks fine...just make sure to securely zip tie the cap on the turbo outlet and check it often.

running the pressure signal off the bov line should give you steadier boost control and less droppoff.

 

my boost gauge is also tap into that line closer to the Intake Manifold. Is that going to be ok?

I'm planning on tapping the hose that's closer to the radiator hose after the little clip thing.

 

looks good to me i ran mine to the waste gate and the turbo nipple and have been perfect and mounted it right to that radiator bolt soits short lines... holds perfect and is just amazing but many people have done it ur way and had sucess let us know how it works out


evoisdream

 

yeh, from what I've read, by connecting it to the turbo nipple causes the boost to be fluttered and not as stable.

Yeh, I'm going to cap the turbo nipple and tap the hose that I tapped my boost gauge onto.

Hope it works out. I'm going to try to work from the top, since I don't want to take the undertray out. I heard it was a headache to take out and put back in.

damn..., i have to take the intake box out, upper intercooler metal pipe, the fan, and few other things tomorrow.

wat a pain...

what are you guys running your boost at?

I have the catback exhaust, i'm running real rich, and I'm peaking at 21 and tapering to 19 psi stock.

I'm thinking 21psi daily and 23 psi at race track without tuning A/F. you think that'll be safe?

 

u will pretty much have to take off the undertray to do it right and since ur gonna cap off the turbo nipple u will want to cap it and probly zip tie it or something and u cant really get thier good from top the undertray isnt that bad just take ur time and b nice to the plastice screws lol.... where were u finding ur info on the boost controller being not as stable mine is holding 20 psi all the way up all day ? not saying ur wrong just curious

 

on that thread on my first post with few other ones.

There's only about 4 good threads about Hallman MBC install.

That's what I've found out through reading those.

the boost peak is more evident when you tap into the turbo instead of the bov/intake manifold line.

 

That hasn't been my experience whatsoever. I NEVER had boost surging issues or other instabilities by connecting to the nipple on the turbo. Anytime I've ever had any boost tapering it's been caused by LEAKS not by where the MBC signal is sourced.

The difference between tapping for the boost "signal" at the turbo versus the manifold is that the "signal" coming the manifold source will compensate for leaks in your intake tract and BPV.

If you're cool with "masking" BPV leaks or other issues then the only other reason I can think of for not tapping at the manifold is that when the MBC starts to crack open and bleed air, you'll be bleeding the supply line to the BPV which could cause a BPV to leak.

 

Have you had you ECU flashed to remove fuel cut? If not, running those boost levels will be okay since you'll undoubtedly hit fuel cut, especially at 23psi on race fuel.

 

I have mine wired just like this.. works great. I believe i have read that in lower boost applications, hooking up the the turbo nipple is fine, however your are determining boost at the source. This level of boost is not constant all the way to the intake manifold. My boost was all over the place when i was running it this way. Completely inconsistant. Now that it is hooked up like in the diagram above.. it hits my set amount of boost all the time, and has no chance of spiking.

 

My MBC is connected to the turbo and selenoid, and it touches 21psi and tapers down to 16-17psi, Im also going to do the diagram and see if it holds.

but my stock boost gauge is connected to the or by the FPR like the way they show in here.
But should I relocate it to the intake manifold line?

 

Exactly my point. By hooking up the MBC to reference the nipple on the turbo, you're regulating the output of the turbo, not the pressure delivered to the manifold. If you're not concerned with leaks and pushing the turbo outside of it's efficiency range to overcome any leaks, then referencing manifold pressure will be more consistant. Bear in mind that by referencing the manifold, your feedback loop will be much, much larger since any changes in boost pressure affected by the wastegate will need to travel the entire intake tract before it reaches the boost controller and then passed down to the wastegate.

 

Always source the MBC off the turbo discharge nipple

 

ok, this is crap now since i've already tapped the T-fitting and capped off the turbo discharge nipple.

lol

Everyone's got a different opinion about how.

But I'm going to try this for a while, since I need the car moving, then later on, i'll change the setup to see how that does.

Having some issues with the in-cockpit knob not turning and boost being at 11psi now.

From an advice I should turn the inside screw in MBC to quarter counter clock wise and it should free up the in-cockpit knob turner.

any input will be great. I've got the advice from hallman.

 

ok, problem fixed.

if you stick it to the counterclock wise too much, it'll just bottom out on the mbc inside.

damn, had to take the upper piping again.

those rubber hoses with texture on it gave me such a freaking burn on my hands. lol