[v12-engine] Vacuum delay valve

I noticed that some of the later V12’s are fitted with a vacuum delay valve.
This device may help a theory I have in mind to improve the performance of
my carb’ed V12.

Could someone explain how they work, please? Is the amount of vacuum passed
through simply delayed by, say, .5 second, or is it delayed by releasing it
at a lower pressure (?.. is that correct when talking about vacuum?) for a
longer period of time? A device that does the latter is what I’m looking
for. Also, I presume they have a diaphragm but does it rot, and can they be
repaired?

TIA.
Paul.

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Could someone explain how they work, please?

Restricted orifice…

Jeb

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http://www.jag-lovers.org/cgi-bin/majordomoFrom: “Paul Clarkson”

-----Original Message-----
From: owner-v12-engine@jag-lovers.org
[mailto:owner-v12-engine@jag-lovers.org]On Behalf Of J&L Autoworks
Sent: 29 June 2001 11:39
To: Jag- Lovers
Subject: Re: [v12-engine] Vacuum delay valve

From: “Paul Clarkson”

Could someone explain how they work, please?

Restricted orifice…

Jeb

Sounds painful, but I have diagrams which show them as being canisters which
look as if they have diaphragms inside. I have used bullet connectors
filled with solder and a 1mm hole drilled as a restrictor in a vacuum line
before, but I am curious about the cans.

Paul.

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