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Join Date: Jul 2013
Posts: 1,104
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PMO vac line / check valve
Installing some PMO 46's on my engine an don't know if I need both of these pieces. Do I need both the elbow and check or do you install the check directly into the manifold?
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03-20-2016, 08:42 AM
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Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,481
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That's the vacuum for the power brakes. You need to tap off both sides to have a constant vacuum.
Bruce |
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03-20-2016, 11:55 AM
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Senior Advisor
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the trick set up for vac. brake booster is an electric pump mounted in the front. then just plug off the ports.
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08 Cayenne Turbo |
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03-20-2016, 12:01 PM
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Join Date: May 2004
Location: New Hampshire
Posts: 6,136
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 Tell us more Herr Brown.... 
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03-20-2016, 02:27 PM
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PMO Manifold Brake Booster
Not doubting Flat6pac's recommendation - but I've been running my '83 with a single line off of the manifold for over a year now and never noticed any issues.
Only 1 of my PMO manifolds had a port for the brake booster. I ran a straight threaded to nipple fitting (brass) off of the manifold and connected it to a hose with an inline check valve (yes, you need a check valve) then connected to the original hose for the booster. Looking great - Good luck. Gordo
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Don "Gordo" Gordon '83 911SC Targa |
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03-20-2016, 05:40 PM
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Quote:
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08 Cayenne Turbo |
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03-20-2016, 07:02 PM
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Join Date: Dec 2012
Location: Seattle
Posts: 8,943
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Hey thats me!! Let me know if you have questions about the pump.
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1982 911 Targa, 3.0L ROW with Webers |
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03-20-2016, 07:55 PM
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Ayle -
Did you run your setup before you installed the pump? I may start off without it and test out how the DC60's do on the vacuum side. |
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03-21-2016, 03:05 PM
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Join Date: Dec 2012
Location: Seattle
Posts: 8,943
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No, I went with the pump from the start. Probably worth noting that I have Webers and not PMO. I was a little turned off by tapping/drilling them. Additionally the price of that metric mind pump has gone up substantially since I bought mine in 2013.
It looks like you have a pretty good solution out of the box from PMO.
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1982 911 Targa, 3.0L ROW with Webers |
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03-21-2016, 03:40 PM
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Schleprock
Join Date: Sep 2000
Location: Frankfort IL USA
Posts: 16,639
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I have the same setup as Gordo and my vacuum-boosted brakes in the '79 have worked just fine with lumpy Web 149i (modified S) cams or Web 120/104 cams and Weber carbs. One tap into cyl. runner #2 with an appropriately sized drill bit for a 3/8 NPT adapter fitting with a large barbed hose nipple to connect up with a check valve
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Kevin L '86 Carrera "Larry" |
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03-22-2016, 05:28 PM
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