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Ruf MBC

I have been looking at the attached document from Ruf for their manual boost controller for the 930 and trying to figure out the hose attachment to the wastegate itself based on this diagram. I don't see where the boost signal is picked up or how the double banjo bolt is utilized. Has anyone else installed their mbc per the attached diagram? Thanks.
Thank you Fritz for taking time to walk me through your set up.


Last edited by OSI930; 10-11-2017 at 01:37 PM..
Old 10-02-2017, 08:58 AM
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the boost hose is T'd where it goes into the WG.
then goes to the dial a death and back to the top of the WG.

basically you are just regulating a small amount of air pressure on top which adds to the spring pressure.

I have a 5bar spring I can put in and then dial up the boost to 1bar if I wanted. that way if someone drove the car that does not know it I could turn it way down.
I think only 2 other people have driven it and my wife is not one of them.
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86 930 42kmiles [__] RUNNING:[__] NOT RUNNING: ____77 911S widebody: SOLD
88 BMW 325is 200K+ [__] RUNNING: [__] NOT RUNNING:
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Old 10-02-2017, 10:07 AM
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Quote:
Originally Posted by T77911S View Post
the boost hose is T'd where it goes into the WG.
then goes to the dial a death and back to the top of the WG.

basically you are just regulating a small amount of air pressure on top which adds to the spring pressure.

I have a 5bar spring I can put in and then dial up the boost to 1bar if I wanted. that way if someone drove the car that does not know it I could turn it way down.
I think only 2 other people have driven it and my wife is not one of them.
Whats the benefit of doing it this way? My aftermarket boost controller just tees into the original blow off line from the intercooler to the wastegate?

It just adds resistance to the airpressure...

Works great...
Old 10-02-2017, 10:58 AM
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I was just explaining how the RUF dial a death was plumbed in.

besides, the RUF DaD is a classic, its just not the same
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86 930 42kmiles [__] RUNNING:[__] NOT RUNNING: ____77 911S widebody: SOLD
88 BMW 325is 200K+ [__] RUNNING: [__] NOT RUNNING:
05 BMW 330CI 130K:: [__] RUNNING: [__] NOT RUNNING:
08 VOLVO V70 190K:: [__] RUNNING: [__] NOT RUNNING:
90 B2200[] RUNNING:[_] NOT RUNNING:__2000 MER E320 WAGON [_] WRECKED:[]RUNNING:
Old 10-03-2017, 03:59 AM
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Thanks for the replies. I appreciate it. I am still not understanding how the connection at the top of the wastegate using the double banjo fitting would work if the wastegate vent is on the same double banjo bolt.
Old 10-11-2017, 01:41 PM
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Garage
Here is another diagram that may be more clear.


Wastegate trouble shooting

You "T" the pressure side and attach to inlet side of MBC. then attach hose to outlet side of MBC and connect the other end to the top of the wastegate. This puts pressure front the "open" MBC (turn handle clockwise all the way) to give max boost. Turn handle CCW all the way to stop pressure flow to give lower boost level with spring force only.

I have a RUF instruction sheet for the polyurethane front valance and it sucks too. This RUF diagram looks to be done by the same "artist".

Rahl
Old 10-11-2017, 08:34 PM
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