Hi Gary,
After a 100,000 miles or so, without having been rebuilt, any distributor
(Lucas or not) will not be operating at the original factory advance curve
settings. Especially a Lucas, which wears without regular lubrication, and
where most of the advance characteristics are determined by 2 little springs
and a cam.....
Our problem is compounded by the fact that our cars, when they were built,
were specified (look in your owners handbook) to run with high octane leaded
fuel - which isn't available to most people in the world in 2012.
So the issue is that no one with a non rebuilt, and non regraphed distributor
is actually running the factory engineered advance curve; and in 2012, with
current fuel, and changes made over the last 50 years or so to our cars
(different cam? Rebored? Lightened flywheel? Ported head and bigger valves?)
it probably isn't the correct advance curve for your current engine setup
running current fuel....
I can see the advantage, but I don't have a 123 distributor, so I can't
comment on how you set it up, or how you change it.
Best
Chris
Sent from my iPhone
On 17/04/2012, at 8:52 AM, warthodson at aol.com wrote:
> I fail to see the "advantage" of an adjustable advance curve over the
advance
> curve engineered by the factory.
> How in the world would the average Healey owner without access to a dyno &
> other equipment determine if he has adjusted the advance curve correctly.
Do
> the instructions that come with this distributor shed some light of this?
From
> a practical point of view how much room for "improvement" is there when
> compared to the original advance curve?
> Gary Hodson
>
>
> The 123 ignition has the advantage of an adjustable advance curve.
> ______________________________
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