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Old 07-31-2006, 03:11 PM   #1
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Default Vacuum manifold

In an effort to clean up all the vacuum lines in the engine bay I was thinking of picking up an air(vacuum) manifold. Has anyone done this before? I really want to get rid of all the damn tees I've had to install. The manifold will feed: boost gauge, AFPR, BOV, O2 Clamp and MAP sensor. I plan on connecting to the port at the back/bottom of the intake, I beleive this was used for automatic transmissions.

Anyone see a problem with this? I can pick up the manifold for about $10 and the hosebarb fittings for about another $15-20.

Jay
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Old 08-01-2006, 12:36 PM   #2
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All it really is it one big tee.
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Old 08-01-2006, 01:05 PM   #3
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My only concern I guess would be the size of the vacuum line feeding the manifold. I have TEEs right now on three locations on the intake manifold. If I would have only used on port on the intake and 4 TEEs would I run into an issue? Which is essentially as you pointed out the same thing as running a vacuum manifold.
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Old 08-01-2006, 01:35 PM   #4
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You should have at least three vac line sources on the intake manifold for all that stuff. Two on top of the front of the manifold and one in the back that is hard to see way at the bottom. Some say the BOV should have a dedicated line to ensure proper operation as some require lots of airflow. Might want to have a dedicated source for your MAP sensor as well if that is what you use to control timing/fueling. That leaves one left for your o2 clamp, AFPR, and boost gauge. Since the o2 clamp and AFPR (if truly an AFPR and not the vortech FMU) are adjustable it should not be a big issue since you can adjust for less "signal", and since the boost gauge is not used to control anything, it can be tee'd as well. Certainly, people have had success with just tee-ing everything off one line, but if you were concerned, I'd try running as above before going to a vac manifold.
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Old 08-01-2006, 01:40 PM   #5
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I'm using the three ports off the intake with a tee on each, and an addition tee for the o2 clamp and boost gauge. Right now I'm running the MBC from the compressor housing, but want to change that to the intake. So that will require yet another tee.

In the short term I'm going to run the MAP off the back of the intake manifold by itself (it's a nice big port). And leave everything else as is. The vacuum manifold was an idea to simplifiy things and make it look a little better.

Jay
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Old 08-01-2006, 01:51 PM   #6
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Quote:
Originally Posted by jayc72
I'm using the three ports off the intake with a tee on each, and an addition tee for the o2 clamp and boost gauge. Right now I'm running the MBC from the compressor housing, but want to change that to the intake. So that will require yet another tee.

In the short term I'm going to run the MAP off the back of the intake manifold by itself (it's a nice big port). And leave everything else as is. The vacuum manifold was an idea to simplifiy things and make it look a little better.

Jay
Gotcha. But why run the mbc off the intake manifold? It should work fine off the compressor housing and adjusted correctly should work fine off that site with quicker response no less.
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Old 08-01-2006, 02:03 PM   #7
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Quote:
Originally Posted by brgracer
Gotcha. But why run the mbc off the intake manifold? It should work fine off the compressor housing and adjusted correctly should work fine off that site with quicker response no less.
+1
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Old 08-01-2006, 04:10 PM   #8
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We run these and sell them. nice upgrade.. run like $40.
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