[TR] Zenith-Stromberg-new question

Tim Gaines mtgaines at mail.presby.edu
Wed Jul 22 08:54:42 MDT 2009


I think Randall was on target here. I took the distributor 
completely apart and found what looks like a spring-loaded 
ground connection between the upper and lower base plates 
which slide against each other as the centrifugal advance 
and vacuum retard units change the timing. After cleaning 
away a lot of gummy residue all over everything with WD40, 
things seemed to be better. Now I am a little unsure of 
just where to set the timing since my vacuum retard unit 
doesn't work. According to specs, I should use dynamic 
timing and set to 2 degrees after TDC with the vacuum unit 
attached. Can't do that. With my TR6 I do a static 10 
degrees before TDC (at least as a starting point), but the 
Spit has a breakerless distributor, so can't do that. If I 
set the timing at 10 degrees BTC dynamically, am I getting 
some influence of the centrifugal advance?

So, my question for the day is, with electronic ignition 
and no vacuum unit, where do you set the timing 
dynamically on a 1500 Spit? As always, thanks for any 
advice.

Tim Gaines
Clinton, SC
1980 Spitfire
1974 TR6

On Mon, 20 Jul 2009 12:10:27 -0700
  "Randall" <tr3driver at ca.rr.com> wrote:
> Tim,
> 
> Check the wires inside the distributor.  Unfasten one 
>end and check for
> continuity while tugging on the wire and flexing it. 
> Also inspect the
> insulation carefully, for any place that could rub and 
>ground the conductor.
> 
> Your description sounds rather similar to a problem I 
>had many years ago, on
> a non-LBC where the wires to the electronic ignition 
>conversion had been led
> through the same hole as the vacuum advance.  The 
>advance rod had rubbed
> through the insulation, and would ground one wire only 
>when the advance was
> in a particular location.
> 
> -- Randall 
> _______________________________________________
> 
> Support Team.Net  http://www.team.net/donate.html
> 
> This list supported in part by the Vintage Triumph 
>Register
> http://www.vtr.org
> 
> 
> Triumphs at autox.team.net
> http://autox.team.net/mailman/listinfo/triumphs
> 
> You are subscribed as mtgaines at mail.presby.edu
> 
> http://www.team.net/archive


More information about the Triumphs mailing list