[Tigers] Distributor Rotors

[Jerry & Maureen (Mo)]

Yes, I have come across the same thing with my Dura Spark II setup (big
cap).  The way I discovered it was when I cut a "window" out of another cap
to check the phasing of the distributor, and sure enough there was about a
.100 of an inch gap between the rotor tip and the distributor posts. To
solve the "gap problem" I soldered a small piece of copper to the end of the
rotor tip, it was so close that it actually touched the contacts at first,
but after a few revolutions it cleared itself. (I wouldn't advise getting it
that close, but the closer the better). And yes I did have to clean out the
shavings that it left behind.
I guess the point is that if you have a "hot" ignition system it shouldn't
have any problem jumping all the "gaps", but if you have a stock system you
don't need to make the system try to jump any more gaps than necessary.

Jerry Christopherson
9473187  

-----Original Message-----
From: tigers-bounces at autox.team.net [mailto:tigers-bounces at autox.team.net]
On Behalf Of Buck Trippel
Sent: Tuesday, September 01, 2009 9:48 AM
To: tigers at autox.team.net
Subject: [Tigers] Distributor Rotors

Sorry for the typos. I'll try again.

Dan Walters discovered a strange parts problem that might effect any of us.

When trying to trace an engine misfire, we were about to replace a rotor
when
Dan noticed that the two looked different. He "chucked" a rod the size of a
distributor shaft into the lathe and placed the black rotor on it. It fit
snugly. Then he moved a cutting tool so that it just made contact with the
tip
of the rotor.
(you can see pictures on the CAT Forum
http://www.catmbr.org/VB_forum/showthread.php?p=310#post310 )

He replaced rotor with a blue one. The tool was not moved. There was a large
gap between the tip of the rotor and the tool. The gap measured .084".

Has anyone else noticed variations in rotor sizes supplied for Ford
distributors?

Buck Trippel
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