problem with boost controller

[brandons 95]

I just got my car back from the shop today, and when i was looking under the hood it looks like the unhooked my manual boost controller and ran a vacum hose from the acuator to the nipple that is on the hose that comes off the top of the evo 3 16 g and connects to the intercooler pipe (why would they do this) and how do i reconnect it to my boost controller i have the turbo xs mbc that has a nipple on the bottom and the side, which hose goes where. thanks for any help you can give

 

[VelocitàPaola]

That sounds right... all they did was connect a boost source to the wastegate actuator. If you want your MBC back, put it inline between the boost source and the wastegate actuator (i.e. somewhere along that vac line).

 

[brandons 95]

if its connected like that then how do i control the boost

 

[oldman]

Is this the TurboXS standard or HP version?

it looks like the unhooked my manual boost controller and ran a vacum hose from the acuator to the nipple that is on the hose that comes off the top of the evo 3 16 g and connects to the intercooler pipe

Is this nipple a straight fitting or a T fitting? If it's a T, where is the other nipple connected to? The bcs?

 

[VelocitàPaola]

This was what I pictured with the description you gave... The diagram shows where the MBC should be.

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[brandons 95]

it is the standard mbc, the nipple looks like a (L) and it just goes straight to the acuator right now, also when i reconnect the boost controller the way the pic shows where should the adjustment screw be set and how do i know how much boost it will be sitting on

 

[oldman]

it is the standard mbc, the nipple looks like a (L) and it just goes straight to the acuator right now

1. Remove the L.

2. Connect the hose from the actuator to the fitting inline but opposite to the adjustment knob of your mbc.

3. Connect the hose from licp to the T fitting on the mbc.

4. I would replace the hoses and keep them as short as possible for precise boost control.

BTW you have been warned twice now for using capitalization and punctuation, with the new warning system in place, an automatic suspension will be triggered once you hit four warnings. Please put effort into this, I would hate to see you get suspended for something as easy as this.

 

[brandons 95]

The L fitting is welded into the pipe that comes off the top of the turbo, So I cant remove it, And my MBC only has the adjustment screw that is set down in the whole on the top, There is no T fitting either that i know of

 

[VelocitàPaola]

So you have a boost line that goes directly from a nipple on the compressor housing on the turbo to the wastegate actuator?

If that's the case, just put the MBC somewhere along that line. Look at the diagram.

Oldman? Any input? Does the diagram do the set up justice?

 

[oldman]

The L fitting is welded into the pipe that comes off the top of the turbo, So I cant remove it,

We misunderstood you then, just skip #1.

And my MBC only has the adjustment screw that is set down in the whole on the top, There is no T fitting either that i know of

Replace the word "T" in #3 with "the other" and you should be good to go.

Oldman? Any input? Does the diagram do the set up justice?

Not bad but the exhaust path looks to be a little restrictive. Keep in mind that if he had the HP version or most brands of a ball/spring type mbc, the in and out fittings on the mbc would have been reversed. The standard version is a bleeder type mbc, that's why I asked Brandon which he had in the beginning.

 

[brandons 95]

When i put the boost controller in line should the adjustment screw be set all the way open, or closed.

 

[brandons 95]

What do you guys think about the greddy profec b spec2 electronic boost controller

 

[VelocitàPaola]

When i put the boost controller in line should the adjustment screw be set all the way open, or closed.

Open, then start closing it little by little as you want to raise boost.

What do you guys think about the greddy profec b spec2 electronic boost controller

Search or start a new thread and ask.

 

[VelocitàPaola]

For future reference...

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[brandons 95]

On my mbc it says to close it to lower and open to raise, So do I still do the way that you say

 

[VelocitàPaola]

It says close it (as in fully turn the knob to the right) to lower boost? That doesn't make sense; its counterintuitive with regards to how a MBC works.

When you close an MBC, your restricting boost to the wastegate actuator, thereby requiring more pressure to actually open the wastegate. If you close yours, no pressure will get to the actuator, and you'll uncontrollably boost.

I think there may be a misunderstanding somewhere... you want the MBC fully open at first.

 

[oldman]

One of you is talking about a bleeder type mbc and the other is talking about a ball/spring type.

Brandon, you need to turn it all the way in because you have a bleeder type mbc, ball and spring on the other hand would have been the opposite.

 

[oldman]

When you close an MBC, your restricting boost to the wastegate actuator, thereby requiring more pressure to actually open the wastegate. If you close yours, no pressure will get to the actuator, and you'll uncontrollably boost.

A bleeder type mbc doesn't work like that, the more you open the knob, the more air you bleed off, the less the actuator sees, the higher the boost level.

 

[VelocitàPaola]

One of you is talking about a bleeder type mbc and the other is talking about a ball/spring type.

Brandon, you need to turn it all the way in because you have a bleeder type mbc, ball and spring on the other hand would have been the opposite.

True, I misread your previous post oldman, I thought you confirmed that he did not have the bleeder-type. oops...

 

[brandons 95]

Thanks you guys for the help

 

[oldman]

True, I misread your previous post oldman, I thought you confirmed that he did not have the bleeder-type. oops...

That's alright, it was fun watching the two of you go at it.

Thanks you guys for the help

You're welcome, don't forget about the punctuations.