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pettybird
Joined: 30 Apr 2008
Posts: 50
Location: Cleveland Ohio
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 Posted: Mon May 12, 2008 10:13 pm Post subject: need PICS--where to install my MBC? |
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Smoothie I saw that you had posted them a couple years back but the links are dead.
How do you install one without cutting anything?
Thanks again,
Doug |
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ideola
Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
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Maybe924
Joined: 14 Aug 2007
Posts: 412
Location: New London, CT
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| Posted: Tue May 13, 2008 12:29 am Post subject: |
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You need to add a boost gauge first!
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1981 931 GT (CGT Intercooled)
1985 911 Targa Carrera (Sold) |
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Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
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| Posted: Tue May 13, 2008 1:39 am Post subject: |
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There's only one easy way to install a boost controller without cutting anything. You need to find a boost source (like from under the boost cutoff switch, illustrated HERE) and route it to the vent at the top of the wastegate. The vent is a threaded fitting that can be replaced with a hose barb.
You then add a simple pressure regulator in the new line. . .piping boost into the top of the wastegate counteracts the pressure from the control line, which is what opens the wastegate. Another bonus. . .if this system fails, you go back to stock boost. If something on my setup let go, I would end up with overboost.
My setup was easy to do, but if I had it to do again, I would use the vent method (especially since I had the wastegate in my hand during turbo R&R).
Oh, and +10 to the gauge. . .you don't want to guess on this.
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Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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pettybird
Joined: 30 Apr 2008
Posts: 50
Location: Cleveland Ohio
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| Posted: Tue May 13, 2008 8:22 am Post subject: |
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| i have a Turbonetics controller and an Auto Meter gauge coming from Summit Racing tomorrow |
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Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
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| Posted: Tue May 13, 2008 8:43 am Post subject: |
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Well, I guess you are going to be cutting something!
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Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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Maybe924
Joined: 14 Aug 2007
Posts: 412
Location: New London, CT
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| Posted: Tue May 13, 2008 10:31 am Post subject: |
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You do know that a VDO boost gauge just pops in where the clock goes right?
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1981 931 GT (CGT Intercooled)
1985 911 Targa Carrera (Sold) |
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pettybird
Joined: 30 Apr 2008
Posts: 50
Location: Cleveland Ohio
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| Posted: Tue May 13, 2008 2:27 pm Post subject: |
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I didn't find the VDO boost/vac gauge at first... the AM gauge is a 30in/hg-20psi gauge which seemed handier than the 25psi unit from vdo found AFTER I ordered... it's a 2 1/16 gauge, too, so it should install the same way.
the controller is a simple MBC. Are you saying that it won't work on the vent line like you described?
it would be 10000000% easier to just cut the stupid WG line in half though, wouldn't it? |
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Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
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| Posted: Tue May 13, 2008 2:56 pm Post subject: |
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Oh, actually, it probably would. A cheap air regulator works as well.
The one rub, though. . .you won't be doing anything to that vent without removing the wastegate, unless you're Elasticman.
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Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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pettybird
Joined: 30 Apr 2008
Posts: 50
Location: Cleveland Ohio
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| Posted: Tue May 13, 2008 3:03 pm Post subject: |
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| Rasta Monsta wrote: | | unless you're Elasticman. |
at 6'3" and 290, no. |
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