Re: TrevorK's 1955 Packard Patrician
Posted by HH56 On 2017/7/14 12:06:12
That is a good move and should solve many potential issues. The downside is losing the original secondary vacuum source but that has been true of many of the "fixes" (PI reworked pumps, etc) developed over the years.
Am curious what you did with the old vacuum line from the pump. Some have gone with the manifold vacuum only for the wipers and that is sufficient unless the engine is under a relatively constant heavy load and vacuum drops for long periods. Just a reminder to make sure the mechanic plugged the second now unused port on the balance valve if you do go manifold only and have no other source.
Some wanting some redundancy have added a dual fuel pump, others, a small demand type aux electric vacuum pump and still others have converted to a combo alternator/vacuum pump as used in some diesel vehicles. The fuel pump approach is best in series with the manifold vacuum as was pre 55 cars but the other pumps can use the secondary port on the balance valve. Of course, some have just eliminated the vacuum wiper and went with electric.
Here is a photo of a dual fuel pump conversion.
Attach file:
(76.57 KB)
Am curious what you did with the old vacuum line from the pump. Some have gone with the manifold vacuum only for the wipers and that is sufficient unless the engine is under a relatively constant heavy load and vacuum drops for long periods. Just a reminder to make sure the mechanic plugged the second now unused port on the balance valve if you do go manifold only and have no other source.
Some wanting some redundancy have added a dual fuel pump, others, a small demand type aux electric vacuum pump and still others have converted to a combo alternator/vacuum pump as used in some diesel vehicles. The fuel pump approach is best in series with the manifold vacuum as was pre 55 cars but the other pumps can use the secondary port on the balance valve. Of course, some have just eliminated the vacuum wiper and went with electric.
Here is a photo of a dual fuel pump conversion.
Attach file:
(76.57 KB)
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