mbc types and clampping compressor fittings
 

I understand that there are 2 different types of DIY MBCs.

One you put inline the compressor housing nipple and internal waste gate. This type does not have a bleeder hole.

The 2nd type is inline with the bov and boost meter etc; and you have to cap/clamp the hole on the compressor. This type of MBC has a bleeder hole.

Now my question is...can I use the type with a bleeder hole inline with the compressor and wastegate? If not, how can I clamp the nipple on the compressor so it can be installed properly?

Thanx.

Re: mbc types and clampping compressor fittings
 

seems like nobody knows the answer...so ill do an expirement and find out.

Re: mbc types and clampping compressor fittings
 

Your post dosn't make sense...all boost controllers go between a vac sourse and wastegate, they bleed the pressure off so the wastegate dosen't see boost right away...there is nothing to do with bov and boost guage!?!?!? You may need to do some more research before you blow you motor

Re: mbc types and clampping compressor fittings
 

No sir, you misunderstood me, let me try to explain again.

Some turbos (probably only the ones with an internal waste gate) have a nipple on the compressor housing. In a normal setup, you need a vac line from the compressor nipple, to the waste gate actuator. The bov, boost gauge etc gets its signal from the intake manifold. So there are 2 sets of boost signals so to speak.

The MBC with the bleeder hole goes must also get its boost/vac signal from the intake mani. To install this type, the nippleon the compressor must be closed/capped/clamped and the auctuator must now also get its signal from the intake manifold. The type without a bleeder hole goes inline form the compressor and actuator. Do you see what I mean now?

Re: mbc types and clampping compressor fittings
 

Yea i understand what you are saying but show me a boost controller that dosen't have a bleeder...the purpose of the boost controller is to bleed of or restict the flow to "trick" the wastegate to think you are running lower boost...the only difference between the compressor vac source and the mani vac source is that the mani will account for the pressure loss over the charge piping and IC...I run my vac source off of the mani to make sure my wastegate opens when the motor is getting 9psi instead of when the turbo is pushing 9psi...so I don't really see what your question is, plug the compressor housing and run a vac line from the mani with a MBC inline and call it a day

Re: mbc types and clampping compressor fittings
 

okay, but what do i plug it with...becaue I dont know what could do the trick since it will be under pressure. Yeah, im dumb, whatever :1

Re: mbc types and clampping compressor fittings
 

i ran mine unplugged just fine... just get some vac hose and shove a bolt in it if your that worried

Re: mbc types and clampping compressor fittings
 

even better the compressor has threads just thread a bolt into the hole

Re: mbc types and clampping compressor fittings
 

or a brass plug with a square thing on top.

Re: mbc types and clampping compressor fittings
 

I thought about a vac line with a bolt, but I was afraid to have shrapnel in the engine bay ;D

I also looked for something to cap the nipple of the compressor housing, but I never found anything...but then again, I didn’t look that hard. :S

I guess I gotta go back to Home depot…again... :P

thanx for the help guys. O0