MBC install [Merged 10-7]

[b00sted99-X]

HERE, DAMMIT!

http://www.dsmtuners.com/forums/showthread.php?t=237982


ok n00b question here.. i got my MBC all hooked up fine (dejon tool.. sweet!) i'm just wondering what to do with the stock boost solenoid hoses.. i took the top one completely off (this is the one that was going to my intake pipe.. then capped that nipple on the pipe) .. the one on the bottom, that tees off and goes to both the wastegate and the turbo housing, is still there. i just bent it backwards and stuck it in the bracket that the top hose was at.. its still connected to the solenoid though. is this alright? can i leave it on there like that will it screw anything up?

 

[CarTrader29]

Ok the car is boosting about 14 psi at the moment. I had a talon before with a Big 16G. I know the 16g would pull harder than my 14b but is it normal for 1st gears boost to be about 10 psi and second gear at 12-13 psi and 3rd to 14psi? Cuz in the 16G it always pulled 15psi on all gears unless something is wrong.

 

[justin_5585]

On my car i see 12 psi in first, 14 in 2nd, and 15.5-16 in all other gears. Thats with a 14b.

-justin

 

[CarTrader29]

how does it pull though? DOes it pull your head back? The reason I ask is I had a talon boosting 15psi on a big 16G and it pulled nicely. 14b doesnt pull as hard....

 

[Sinclair159]

i kno that you have to take out the BCS in order to install the new MBC but im not so sure on what parts of the BCS to take out... and it also says to plug the lines that you removed... what should i plug them with?? and which ones do i plug??? there 2 lines that run off the BCS one goes to a T and the other goes to the intake pipe?? what do i do with them ??? by the way its a 92 talon tsi awd... might help

 

[96whgsx]

Here are some plugs, when I did my ebc install, it was hard as hell to find assorted plugs.
http://www.boostcontroller.com/inde...ostcontroller.com/index.php?page=1&category=6

You use these plugs on the lines that you removed. Like the hose you take off that comes off of the actutator, and tees of into the intake hose and the BCS. You plug up the intake part that used to be connected with that hose, so you don't get unfiltered air.

I'm sure there is a diagram somewhere that helps. I'll try to find it.

Here we are:
http://www.dsmtuners.com/forums/showthread.php?t=105573&highlight=boost+controller

 

[LaN-]

you might already know this but its worth telling you cuz i just had the problem

watch your intake pipe when doin this, after running all the vacum lines i put my intake back on and the boost was CRAZY it wouldnt stop goin up problem was the intake pipe was pressing down on the hard line on the wastegate putting a kink in the line.

Just an FYI its a stupid thing but you never know

LaN-

 

[Sinclair159]

thanks for your guy's help.. i was just looking at my car... and just to be sure... there are 2 places i have to plug correct??? one right behind the filter on the intake and one on the pipe coming off the turbo ??? am i correct or are there more??

 

[toojung2die]

You are correct. If you're leaving the BCS disconnected and in the car you might want to cap the nipples on that too so dirt stays out.

 

[MitzMadness]

When I installed my MBC i ran the one line to the waste gate actuator and the other line to the turbo compressor housing... Now on the tech articles it said to run the line to the intake manifold instead of the compressor and just put a T- fitting into the line coming from the BOV and route it that way. It said it was better for the MBC so on and so on. So my question is, is this the right way to hook it up and is my current setup wrong or does it matter between the two? I'm only asking because one DSMer told me it did not matter.

 

[blackGSX2g]

Turbo XS reccomends to T it off of the manifold, and I would reccomend the same.

 

[MitzMadness]

What should I run from the nipple on the turbo compressor housing itself?

 

[ChrisFlo]

What should I run from the nipple on the turbo compressor housing itself?

Cap it off.

 

[a_scobel]

For the nipple coming off the compressor housing, I just got a screw & put it in the little hose nipple going to the housing (Making sure the base of the screw is wide enough to never get sucked into the turbo, of course).

Picture I used...

 

[MitzMadness]

Thanks guys

 

[tstkl]

so i installed my custom mbc today.... its a little janky but it works....(the hardware store had no female hose end thingys so i just used a male and this huge connector thing... and they had no 1/32 bits, so i used a 1/16, i knew id get a little bit of the bleader mbc effect, but i can always turn it down, right?)
then time for the install.... i didnt have anything to cap off the air intake nipple, or the compressor outlet nipple, and couldnt find the "tee" between the bov and the intake manifold, so i just hooked the mbc up to the compressor outlet and then used the existing tee to hook it up to the wastegate actuator and the aircan, so that i wouldnt suck in unmetered air....

first pull: (theres a little hill by my house that i just floor it on, cuz boost is built fast on hills for some reason (engine load?))
floored it, and wham 20psi+, i dunno cuz once i saw it fly past 15 i took my foot off the gas and panicked, cuz i have the stock fuel system and didnt think that 20 psi was a good idea, i didnt want to run more than 15... (btw the setting i was at was achieved by blowing into the mbc and screwing in the screw until i felt and heard the air being restricted, then i backed it out some....STUPID!!!!!!!)

second pull:

floored it, saw 16 psi and let off, i dunno if it would have held it there, but i drove it home and took it out a lot....

any one see anything wrong with my setup i should change?

btw i couldnt use one of those rubber hoses covered ni nylon or whatever it is, so i cut a rubber one and used that....anyone think ill have any problems with the rubber melting or something? its right near the exaust manifold...

edit: where it says first pull i had first pull and that came out as a frown... so i added a space...

 

[tstkl]

follow up:

well, as seen in physics, with electric circuits... when there is a less restrictive pass, more current goes through that path than the other... the set up i have will never be able to hold any boost, so i must simply remove the t peice and block off the aircan nozzle... what have you guys used for that?

 

[tstkl]

k so i capped off the aircanister nipple...(used an eraser from a pencil and just bored out the center...) and am currently running a straight line from the compressor outlet, to the mbc, to the wastegate actuator....but it still doesnt hold boost, got up to like 20 psi again.... so im guessing my spring is way too stiff.... cuz its 2 inches long...im going to cut it probably today...

 

[oldman]

All out boost = boost shoots up immediately and never return.
Boost creep = hitting the initial setting first then slowly creeps up as RPM increases.

Which one do you have?

 

[tstkl]

all out

 

[oldman]

Remove the mbc and run a hose from the compressor nipple directly to the actuator, if problem solve, bad mbc or you have it hooked up backwards. If problem persists, actuator is stuck closed.

 

[tstkl]

it held boost before when the bcs was hooked up, the mbc is not backwards, im not that stupid,... im thinking that either the spring is too strong, or the 1/16 inch drill bit i used for the bleeder hole was too big,.... so i got some electrical tape and put it over the hole, and i poked a small hole it in... well see how it runs once i get a chance to drive it....

edit: or the spring is too long, its 2 inches, could this be the problem?

 

[oldman]

I didn't read the entire first post until now and I see what you mean now, basically you made a ball/spring type mbc yourself. I agree with you then that either the spring is too strong/long, so that pressure signal never got pass the ball, or the little wastegate pressure lease hole is too big bleeding off too much pressure. If after you block off the bleeder hole and problem still persists, I would try either cutting the spring a little at a time or try a softer spring.

 

[98GSXboosted]

i just installed my MBC and its not working. its a simple turn nob T design. the bottom outlet on the MBC is connected to the hose that connects the wastegate to the intercooler piping. the other end of the MBC is connected to the hose that runs to the top of my greddy rs BOV. i turn the knob all the way in and all the way out and still just running 8-9 psi. what am i doing wrong?

 

[98GSXboosted]

for the hose im using to connect the mbc is xl fuel line 3/16in(4.8mm) Sae30r7 if that helps, i was told its used for vacuum and i assume thats what this is

 

[98GSXboosted]

also forgot to add i have a 14B turbo, mods in profile