Billy:
Ahem. Vacuum retard does not reduced engine performance. Vacuum
retard disables itself except at idle, so baseline timing is restored
whenever you touch the accelerator, hence no affect on performance.
Vacuum advance only engages at cruise (moderate throttle), so
vacuum advance disables itself at idle and at full throttle. You are
correct about the connection; it cannot be connected directly to the
manifold but must be connected to the appropriate vacuum port on the
carburetor. The amount of advance does follow the manifold vacuum
however, so in that regard it is not "backwards".
Vance
-----Original Message-----
From: owner-spridgets@autox.team.net
[mailto:owner-spridgets@autox.team.net] On Behalf Of Billy Zoom
Sent: Wednesday, April 19, 2006 11:12 AM
To: David Lieb; de Brebisson, Cyrille (Calculator Division); Spridget
List
Subject: Re: Distributor and Carburetor problems...
Vacuum advance does not connect to manifold vacuum. That'll make it work
backwards. Vacuum advance advances the timing as the throttle opens.
It needs a source that is opposite of manifold vacuum.
Vacuum retard is a retarded method of reducing emissions by reducing
performance.
BZ
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