[Spits] Vacuum port

[Bill Gingerich]

Larry,

While I'm not an expert in vacuum dynamics, I would think in this case that
vacuum is vacuum.  If you're just looking to connect the distributor, any
port on the manifold should work.  I think that you could even put a "T" in,
and connect both the distributor and a vacuum gauge without a problem, since
both devices are sealed.  The only issue I would see is if you wanted to use
the same port for crankcase venting and the distributor connection.  The
constant flow through the vent hose might affect the advance of the
distributor.

I know nothing about the Mallory units.

Bill G
Newalla, OK
'74 Spitfire

 

-----Original Message-----
From: spitfires-bounces+bill=gingerich.us at autox.team.net
[mailto:spitfires-bounces+bill=gingerich.us at autox.team.net] On Behalf Of
Larry Vaughan
Sent: Saturday, May 24, 2008 3:55 PM
To: spitfires at autox.team.net
Subject: [Spits] Vacuum port

I have a Weber DCOE on my Spit. It has no vacuum port. The Cannon intake 
manifold has a plugged port on one runner. Can this port be used as a 
vacuum port for the distributor or a vacuum gauge or is it to be used 
for emmissions like the valve cover vent. I have the vacuum advance 
Delco distributor on right now, with the vacuum hose plugged. I do have 
a  Mallory dual point distributor that is all mechanical advance but I 
have to drill the shaft to get the oil pump dog on, which I am not 
anxious to do!

Larry