Dave,
The notch on the dist. cap locates on the left diaphragm mounting screw. It
has a raised portion in its casting that the cap locates on over the screw.
It will be hard to find an old period vacuum can (with the washers that can
be added to or removed from to change the amount of vacuum advance). The
newer ones have the adjustment inside as you were saying using a small allen
wrench.
Everyone should test their diaphragm periodically with a Mighty Vac or
something to see if it will hold a vacuum or not. If not then it needs to be
replaced. This will improve your mileage somewhat as that was what it was
designed for.
Jerry Christopherson
9473187
-----Original Message-----
From: tigers-bounces+jcmc2006=suddenlink.net@autox.team.net
[mailto:tigers-bounces+jcmc2006=suddenlink.net@autox.team.net] On Behalf Of
Dave Munroe
Sent: Tuesday, September 23, 2008 8:07 AM
To: rfraser@bluefrog.com
Cc: tigers@autox.team.net
Subject: [Tigers] SBF Distributor questions
I had some ignition issues that I finally traced to a vacuum advance unit
that had a big hole in the diaphragm.
I ordered a replacement from Summit, and recieved a wierd looking unit with
a cast iron flange that looks like it should bolt to an intake
manifold, has a steel cannister and a spigot for a tube. It is adjustable
with an Allen wrench through the spigot. Definitely not for my car!
This resulted from the order guy having difficulty finding a part number for
the proper replacement unit. He asked some questions I couldn't answer:
What is the model number of the distributor? (where is this number located
and is it likely I could find it without removing the distrib?)
The distributor cap has a slot in the bottom rim to locate the cap on the
distrib body, but there is no matching tab on the distributor. Is this
unusual for a
Tiger distributor? As it is the cap is free to rotate, confined only by the
wires' resistance to rotation.
Thanks for your help.
Dave
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