The 45 has the bigger cap to prevent spark-scatter and some of the caps even
had internal ribs cast inside for that.
The early 45 points type has the asymmetrical cam and the advance is easy to
modify.
For those still using points, the later electronic 45s can be fitted with a
"eurospec" shaft assembly, with late cam and usually less mechanical advance.
HTH
Glen
-----Original Message-----
From: Bill Babcock <ponobill@gmail.com>
To: Scott Janzen <sjanzen@me.com>
Cc: Triumph 'Friends of Triumph' <fot@autox.team.net>
Sent: Mon, Oct 22, 2012 12:13 pm
Subject: Re: [Fot] Best distributor/ignition for TR4 - conclusion
Gee, maybe I shouldn't have flung all those Lucas dizzies with my catapult.
> I had an informative talk with Jeff at Advanced Distributors this morning.
He recommended a 45D Lucas with a 25D shaft assembly, cuz the larger diameter
of the 45 cap eliminates cross-fire issues. He balances the assembly, puts
in
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