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Old 07-08-2008, 10:50 AM   #1
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I have a 93' Mountainaire Gas 460 Ford that don't have enough vacuum capacity, is it possible to add a can or canister to increase it?
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Old 07-08-2008, 10:50 AM   #2
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I have a 93' Mountainaire Gas 460 Ford that don't have enough vacuum capacity, is it possible to add a can or canister to increase it?
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Old 07-08-2008, 02:53 PM   #3
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Jim, Yes you can use an additional container to increase or buffer the vacuum. It will not actually increase the vacuum, but will increase the volume which will extend the duration. Think of it in the same way you would an accumulator in a hydraulic type application or an auxillary tank in a pneaumatic system.

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Old 07-08-2008, 03:59 PM   #4
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An additional option would be to add an auxiliary 12v vacuum pump, which are inexpensive, and can be used to create a separate vacuum system to drive your vacuum controls and brakes. Use a "can" like lugnut suggests as well. Pull one out of an old clunker at the local bone yard.

Low engine vacuum is certainly causing a loss of power and fuel economy. It might signal something simple like a leak in the intake system, maybe the intake manifold gaskets or carb gaskets? It might also be a warping at the intake mounting flanges too. At the worse case it might indicate worn piston rings and/or valves.

Might be worth having a "leakdown" test performed to ID exactly what's going on so you know what to expect in the coming miles and can plan for it before something major surprises you.
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Old 07-09-2008, 04:02 AM   #5
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Thanx for the replys, hope I have no manifold problems,acts like the old windshield wipers,give it gas they slow down "remember"?
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Old 07-09-2008, 05:37 AM   #6
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Oh do I remember! These days it's not just the old vacuum wipers that slow down...
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