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How To: Manual Boost Controller


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Gustavo wrote on Tue, 09 January 2007 01:17

GerBeGurGya wrote on Tue, 09 January 2007 01:15

I hear you Gus.Good luck to you with your stuff.

you should take a road trip to Maryland and give me a hand Twisted Evil

I'm really thinking about it.Only thing is I can not leave the family home for 2 days so if I go they would come too. Very Happy

I don't know what they would do over there while we would work on your car.Anyway its in the air and a good chance that I could go.I wanna see your house as well before the water takes it away. Very Happy

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GerBeGurGya wrote on Tue, 09 January 2007 01:25

Gustavo wrote on Tue, 09 January 2007 01:17

GerBeGurGya wrote on Tue, 09 January 2007 01:15

I hear you Gus.Good luck to you with your stuff.

you should take a road trip to Maryland and give me a hand Twisted Evil

I'm really thinking about it.Only thing is I can not leave the family home for 2 days so if I go they would come too. Very Happy

I don't know what they would do over there while we would work on your car.Anyway its in the air and a good chance that I could go.I wanna see your house as well before the water takes it away. Very Happy

Alex my friend you are welcome to come when ever you are in MD

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Gustavo wrote on Tue, 09 January 2007 02:16

GerBeGurGya wrote on Tue, 09 January 2007 01:25

Gustavo wrote on Tue, 09 January 2007 01:17

GerBeGurGya wrote on Tue, 09 January 2007 01:15

I hear you Gus.Good luck to you with your stuff.

you should take a road trip to Maryland and give me a hand Twisted Evil

I'm really thinking about it.Only thing is I can not leave the family home for 2 days so if I go they would come too. Very Happy

I don't know what they would do over there while we would work on your car.Anyway its in the air and a good chance that I could go.I wanna see your house as well before the water takes it away. Very Happy

Alex my friend you are welcome to come when ever you are in MD

Alex could you please post pictures of your setup or email them to me . Gustavo1027@Gmail.com. My question is about the "Boost" mechanisim itself . Because i see that you have to connect one hose to it but the MBC has two inlets/outlets. (Im talking about the MBC I bought on Ebay (Same as Alex's and Sachals))

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Thanks for the welcome Gus.

The way you can hook the things up are these.One way is that you cut the yellow hose then you put the "T" piece in between with the arrow towards to the waste gate.Now you just use the center nipple on the "T" piece to hook up the hose and this you can run into the cabin trough the firewall where you would put this hose on the bottom nipple marked with the arrow.The 2nd nipple on the adjuster you can ether leave it as it is like I did or hook up a hose on it and run it back to the engine bay.Its really a breather only with no other function.

The other method which I did myself as well is that you cut the red and the yellow hoses on the solenoid and leave like a 2" only.You plug the ends on the solenoid shut.Now you hook the red hose on the intake of the "T" piece and the yellow one where the arrow does point.This way you can eliminate the solenoid and getting more responsive boost.

The thing works the way like a mix of the MBC with a spring and a ball and the bleed valve.When you turn all the way in the dial and you close the valve the boost will be low.If you leave the solenoid in then the boost will be adjusted by the ECU.If you decide to take the solenoid out of the circuit then the boost will be adjusted whatever the actuator arm has set to.In both case the ball with the spring has some effect on the boost level but I don't know at what PSI the "T" piece let the air trough.Soon as you open the dial the pressure can leave from the hose between the source and the wast gate meaning the wast gate won't get the full pressure and it won't be open fully so you can do a real fine adjustment.This method eliminates the spiking as the ball wont be moving like crazy trying to close then open suddenly and you basically adjusting the pressure the actuator gets.

I have it on the 4th click but its something you have to adjust for yourself.Do not forget to close the valve all the way in before you start the car as in the opened position the boost might be too big as the actuator can not operate the waste gate at all.

I have sent you an email with the photos from the account I use here.

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Gustavo wrote on Tue, 09 January 2007 14:47

Gustavo wrote on Tue, 09 January 2007 02:16

GerBeGurGya wrote on Tue, 09 January 2007 01:25

Gustavo wrote on Tue, 09 January 2007 01:17

GerBeGurGya wrote on Tue, 09 January 2007 01:15

I hear you Gus.Good luck to you with your stuff.

you should take a road trip to Maryland and give me a hand Twisted Evil

I'm really thinking about it.Only thing is I can not leave the family home for 2 days so if I go they would come too. Very Happy

I don't know what they would do over there while we would work on your car.Anyway its in the air and a good chance that I could go.I wanna see your house as well before the water takes it away. Very Happy

Alex my friend you are welcome to come when ever you are in MD

Alex could you please post pictures of your setup or email them to me . Gustavo1027@Gmail.com. My question is about the "Boost" mechanisim itself . Because i see that you have to connect one hose to it but the MBC has two inlets/outlets. (Im talking about the MBC I bought on Ebay (Same as Alex's and Sachals))

Gus bring your car by this weekend...I can help you...Ive got one setup on mine...

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B.G. wrote on Tue, 09 January 2007 22:31

Gustavo wrote on Tue, 09 January 2007 14:47

Gustavo wrote on Tue, 09 January 2007 02:16

GerBeGurGya wrote on Tue, 09 January 2007 01:25

Gustavo wrote on Tue, 09 January 2007 01:17

GerBeGurGya wrote on Tue, 09 January 2007 01:15

I hear you Gus.Good luck to you with your stuff.

you should take a road trip to Maryland and give me a hand Twisted Evil

I'm really thinking about it.Only thing is I can not leave the family home for 2 days so if I go they would come too. Very Happy

I don't know what they would do over there while we would work on your car.Anyway its in the air and a good chance that I could go.I wanna see your house as well before the water takes it away. Very Happy

Alex my friend you are welcome to come when ever you are in MD

Alex could you please post pictures of your setup or email them to me . Gustavo1027@Gmail.com. My question is about the "Boost" mechanisim itself . Because i see that you have to connect one hose to it but the MBC has two inlets/outlets. (Im talking about the MBC I bought on Ebay (Same as Alex's and Sachals))

Gus bring your car by this weekend...I can help you...Ive got one setup on mine...

Cool thanks BG . I need your number again , I reseted my phone by accident and I saved some but i dont think your's was saved to my SIM card Email me your number

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  • 6 months later...

I installed MBC today, but I can't make it work Confused

Look at the pics, please and tell me if I've done smth wrong.

I tightened the screw all the way, but I got 1,2bar only after I had tightened the wastegate actuator as well (I know, it's pointless).

I just can't make it hold much pressure.

http://www.papilion.pri.ee/volvo/images/MBC_1.jpg

http://www.papilion.pri.ee/volvo/images/MBC_2.jpg

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oh, I forgot to add smth...

when I set WG actuator at stock level, so it boosted at 0.9 bar, and I turned the screw of the MBC, not much gain. I turned it in all the way, nothing. Just a 0,1 bar gain. That can't be right.

Then I tightened the WG actuator to ~1,05 bar. Then I turned MBC screw and got also like 0,1 bar gain.

I don't know why it doesn't work. Could the WG spring be toast? Or smth else?

Tomorrow we'll have a dyno-day and some really mean cars come together. All turbocharged.

So, I'll ask around what could be.

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wa666ou wrote on Sat, 14 July 2007 13:04

I installed MBC today, but I can't make it work Confused

Look at the pics, please and tell me if I've done smth wrong.

I tightened the screw all the way, but I got 1,2bar only after I had tightened the wastegate actuator as well (I know, it's pointless).

I just can't make it hold much pressure.

http://www.papilion.pri.ee/volvo/images/MBC_1.jpg

http://www.papilion.pri.ee/volvo/images/MBC_2.jpg

Wrong setup Very Happy

This is what it should look like:

http://s40concepts.net/forum/index.php?t=getfile&id=13515

http://s40concepts.net/forum/index.php?t=getfile&id=13516

I know no duct tape, I've become Hi-Tech hose clamps now!

Anways take all the hoses off the BCS, the rectangle thing near the airbox. Then cover the holes on the BCS, then ONLY PLUG THE BLUE HOSE! Connect the RED hose to the input of the MBC, and the YELLOW to the output. The hoses are color coded, just look near the middle of them.

As for tuning the boost. Here is what I did: START WITH THE SCREW ALL THE WAY OUT. Drive around, then if its ~5psi off then screw it in 3/4-1 turn in. Repeat until you are ~2psi from your desired pressure. Then adjust it in minimal 1/4 or even 1/8 turns.

I had a similar problem when I was installing the hose clamps I accidently hit the MBC and lossenned the screw. I just decided to turn it in 1 revolution. Totally screwed up my boost, I was back to 10psi and it creeped up really slowly.

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burnated, only difference between your system and mine is the blue hose that is connected to the air intake pipe in your setup.

Right?

I have red line connecting to the input and yellow to the output of the MBC.

GerBeGurGya, which valve do you mean?

Quote:

I have it on the 4th click but its something you have to adjust for yourself.Do not forget to close the valve all the way in before you start the car as in the opened position the boost might be too big as the actuator can not operate the waste gate at all.

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Sorry about promptness, had a lot of tennis tournaments.

Yes that blue hose is usless for the MBC just plug it.

About the MBC that GerBeGurGya has, thats called a bleeder system. Don't worry it looks like you have ball & spring setup like everyone else, just follow the tuning instructions I said earlier and that will work.

Oh yea and to finish the install GerBeGurGya, just take the hoses off the BCS plug the blue one, attach the yellow one to the nipple the arrow is pointing too, and the red one to the other one.

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  • 2 months later...

So, I got new WG actuator today.

Like this one: http://www.atpturbo.com/Merchant2/merchant.mvc?Screen=PROD&a mp;Product_Code=ATP-WGT-022&Category_Code=WGT

Of course it needed some modifications to fit in my car.

I made a little bend, to get better angle. Just like it bends on OEM actuator. Tomorrow I'm going to make even more changes, because it's too long and has a contact with the brakes amplifier (don't know the word) - the big round thing.

Anyway, I fitted my MBC as well.

Then I got to thinking. How tight should the actuator be tightened?

If I make the length to be so long that WG opens at stock boost, should I tighten it more so MBC can push it open at 1,2 bar?

I mean - actuator works this way - it pushes outwards to let the gases go by.

To get more boost it has to be shorter. But MBC only pushes it out. So I have to fix the length first. Or do I?

Little bit confused here...

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