Turbo XS MBC installation help.

[my98GST]

Me and my buddy were trying to hook up my turboxs mbc on my 2g when a cop came along and told us that we had to leave autozones parking lot since it was after they had closed. We were in the process of hooking it up from the WG sylinoid. The car runs and everything but its over boosting with the mbc tight as it can be. But on the intake, theres a bung that the line went to that we disconnected from the WG Syl. Is there supposed to be a line going back into the intake?


Or can someone please walk me through how you hooked yours up using the wg sylinoid?

 

[MrBoxx]

Don't touch the BOV line. Use the nipple on the turbo's compressor housing or on the nipple on the J-pipe for a pressure source. Don't use the BOV line. That's the old way of doing it, and it will negatively affect the operation of your BOV.

 

[jibberishballr]

Don't touch the BOV line. Use the nipple on the turbo's compressor housing or on the nipple on the J-pipe for a pressure source. Don't use the BOV line. That's the old way of doing it, and it will negatively affect the operation of your BOV.

? Theres a nipple on stock MHI EvoIII's turbos compressor housing? What are the side effects of doing it the way i showed? Also i dont have a nipple on the j-pipe.

So could you post me exactly how it all should be connected. Similar to the little drawing i did if you could.

 

[MrBoxx]

On an EvoIII, you should have gotten an aftermarket J-pipe. Some vendors include a nipple on their J-pipe or L-pipe (RRE comes to mind). The stock J-elbow on a TD05 turbo also has a nipple. That's the ideal place for a boost pressure source for a MBC. I used to have a fancy paint diagram that showed everything, but the site I host it on is down till tomorrow.

If your J-pipe doesn't have a nipple, the best thing to do is drill a hole in it, tap it, and screw in a NPT nipple fitting. You can get these at most auto parts stores. Get it as close to the turbo as possible.

J-pipe nipple --> vacuum hose --> MBC inlet --> vacuum hose --> wastegate actuator nipple (gold can thing).

This way, the BOV has its own dedicated line and MBC has its own dedicated line, and neither one of them will affect the other.

 

[jibberishballr]

On an EvoIII, you should have gotten an aftermarket J-pipe. Some vendors include a nipple on their J-pipe or L-pipe (RRE comes to mind). The stock J-elbow on a TD05 turbo also has a nipple. That's the ideal place for a boost pressure source for a MBC. I used to have a fancy paint diagram that showed everything, but the site I host it on is down till tomorrow.

If your J-pipe doesn't have a nipple, the best thing to do is drill a hole in it, tap it, and screw in a NPT nipple fitting. You can get these at most auto parts stores. Get it as close to the turbo as possible.

J-pipe nipple --> vacuum hose --> MBC inlet --> vacuum hose --> wastegate actuator nipple (gold can thing).

This way, the BOV has its own dedicated line and MBC has its own dedicated line, and neither one of them will affect the other.

Will the way i said work until i tap the j pipe?

 

[jibberishballr]

So does anyone know if i will be alright to run my mbc the way i have it setup until i change it to where its tapped to the j pipe?

 

[MrBoxx]

It'll be all right to tap the BOV line until you can get a nipple for the J-pipe.

 

[jibberishballr]

Edit:Correct

 

[MrBoxx]

Do i just connect the bov line straight to the intake manifold?

Yes. Your paint diagram is correct. The BOV line is one continuous line straight to the intake manifold, just the way it came from the factory.

 

[Generation X]

On an EvoIII, you should have gotten an aftermarket J-pipe. Some vendors include a nipple on their J-pipe or L-pipe (RRE comes to mind). The stock J-elbow on a TD05 turbo also has a nipple. That's the ideal place for a boost pressure source for a MBC. I used to have a fancy paint diagram that showed everything, but the site I host it on is down till tomorrow.

If your J-pipe doesn't have a nipple, the best thing to do is drill a hole in it, tap it, and screw in a NPT nipple fitting. You can get these at most auto parts stores. Get it as close to the turbo as possible.

J-pipe nipple --> vacuum hose --> MBC inlet --> vacuum hose --> wastegate actuator nipple (gold can thing).

This way, the BOV has its own dedicated line and MBC has its own dedicated line, and neither one of them will affect the other.

Sorry to bring back an old thread but I got a few questions to ask you Mr Boxx, if you don't mind. Right now I'm in the process of switching over to a FP Green from a FP Big28, so therefore I'm using FP's 3" intake pipe which has no areas other than the BOV recirculation connection on it to hook anything back like how I had my factory intake pipe with the Big28.

I don't know what to do with the bigger line that was connected to the stock intake pipe, nor can I remember what it's for. Below is a picture of the hole that I'm referring to that I don't have on my FP 3" intake pipe, and I don't know what to do with it since there is no place for me to plug it back in on my FP 3" intake.

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Here is another picture of a hole that I don't have on my FP 3" intake that I had one end of my boost controller hooked to.

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And finally.... here is a picture of what my RRE manual boost controller looks like. I had one line going to the back side of the stock intake pipe, like I mentioned earlier, and the other line was teed, in which one line went to the wastegate actuator on my Big28, and the other line went to the nipple on the compressor housing.

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I also don't know where to hook my manual boost controller to since I have no nipple on my compressor cover on the FP Green, like I did on my Big28, nor do I have one on my lower IC pipe from RRE. But.... I can tap my RRE lower ic pipe if you deem necassary, because I have already done so on my upper RRE IC pipe for my nitrous tap. I think I used a 1/8 NPT pipe tap I believe. I can take the nipple off of my Big28 if needed though.

If you could lead me in the right direction, or refresh my memory I would greatly be appreciated.

 

[MrBoxx]

Sorry to bring back an old thread but I got a few questions to ask you Mr Boxx, if you don't mind.

Don't mind at all. I'll do my best, and if anyone else has anything to add, they should feel free.

I don't know what to do with the bigger line that was connected to the stock intake pipe, nor can I remember what it's for.

It's most likely the line from the charcoal canister. There are a few threads floating around where people mention what they've done with eliminating the canister completely or if they kept it, what they did with the line.

Here's one and here is TimG's excellent write-up on the whole emissions systems.

If you want to keep the charcoal canister, you'll have to modify the FP intake pipe to accept a large enough nipple for it, or reduce the large hose to a smaller one and use a normal sized nipple.

I also don't know where to hook my manual boost controller to since I have no nipple on my compressor cover on the FP Green, like I did on my Big28, nor do I have one on my lower IC pipe from RRE. But.... I can tap my RRE lower ic pipe if you deem necassary, because I have already done so on my upper RRE IC pipe for my nitrous tap. I think I used a 1/8 NPT pipe tap I believe. I can take the nipple off of my Big28 if needed though.

A nipple on either the lower intercooler pipe or compressor housing would work. I think the intercooler pipe would be easier to drill and tap without worrying about any foreign material getting into the compressor housing. Then it's just IC pipe->MBC->Wastegate.

Hope that all helps.

 

[Generation X]

Don't mind at all. I'll do my best, and if anyone else has anything to add, they should feel free.



It's most likely the line from the charcoal canister. There are a few threads floating around where people mention what they've done with eliminating the canister completely or if they kept it, what they did with the line.

Here's one and here is TimG's excellent write-up on the whole emissions systems.

If you want to keep the charcoal canister, you'll have to modify the FP intake pipe to accept a large enough nipple for it, or reduce the large hose to a smaller one and use a normal sized nipple.




A nipple on either the lower intercooler pipe or compressor housing would work. I think the intercooler pipe would be easier to drill and tap without worrying about any foreign material getting into the compressor housing. Then it's just IC pipe->MBC->Wastegate.

Hope that all helps.

Would you recommend to use any type of teflon tape around the threads of the nipple before inserting it in the lower ic pipe? Thanks again bro!

 

[MrBoxx]

I'm sure a little Teflon tape might help seal up small boost leaks, but I'm sure a little threadlocker would do the same thing, without leaving any strips that might extend into the pipe and possible get sucked into the engine.

 

[cobb]

Ok i have a turbo xs boost controler to and i turned it all the way off and i am still boosting all the way to 15 psi. i am sure i have it hooked up the right way.