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View Full Version : Vaccum: Actuator>MBC>throttle body HELP SR

ayororo
09-07-2011, 04:55 PM
Hey I have my actuator T'd to my BOV with MBC inbetween which then goes to the top right nip on TB

Is this still functional I feel like my MBC may be pointless.

Sr20det Btw.

Thanks
jakerps13
09-07-2011, 11:37 PM
MBC/wastegate should be a dedicated line.
fliprayzin240sx
09-08-2011, 12:31 AM
Vacuum is vaccum. The job of the MBC is to keep the actuator from seeing the pressure it needs to open up.
ayororo
09-08-2011, 01:31 AM
okay so I need to tap my wastegate into my IC piping ? Anyone know a quick diy to create a nipple ? I dont have 1 on mine
cotbu
09-08-2011, 01:49 AM
Use the bottom nipple on the sr throttle body. quick and easy
ayororo
09-08-2011, 01:51 AM
Use the bottom nipple on the sr throttle body. quick and easy

wasnt that hole used for emissions or something ?
cotbu
09-08-2011, 02:19 AM
Yes and it's a boost only source, unless your throttle body is open. it's the equivalent of adding a nipple to the intercooler piping
fliprayzin240sx
09-08-2011, 03:12 AM
Or you can use these...
FTG-QuickTap-CompHSG : atpturbo.com (http://www.atpturbo.com/mm5/merchant.mvc?Screen=PROD&Store_Code=tp&Product_Code=ATP-FTG-010&Category_Code=ATP-FTG1)
jakerps13
09-08-2011, 11:53 AM
Vacuum is vaccum. The job of the MBC is to keep the actuator from seeing the pressure it needs to open up.

I understand, but when you're bleeding off pressure from the mbc and trying to hold the bov shut during boost could cause a leaky bov.
ayororo
09-08-2011, 12:12 PM
Alright so I ran the waste gate to the bottom hole on mani.

Can i rub my MBC inbetween or will it only reduce boost
cotbu
09-09-2011, 05:12 AM
yes you can and boost controllers don't, lower boost beyond the wastegate setting.
Get a ball and spring manual boost controller, if you want more boost than the 2-4psi you'll get from a crappy bleed type.
s14unimog
09-09-2011, 11:38 AM
Be mindful that you're asking your actuator to respond with a source much further away from the compressors discharge. You are also delaying the time the boost pressure can build in that line, not to mention the possibility of leaks before that supply. I would never provide a boost (pressure only) source more than a foot or two away from the compressor discharge. It's especially important for larger turbo's.

This is not arguable
cotbu
09-09-2011, 01:06 PM
Im sorry that was uncalled for :-)
Anyhow, that distance should not have any adverse affects on your setup.
s14unimog
09-09-2011, 01:37 PM
^ do you ever re-read what you post?