Bernard,
Where did you source your Luminition ignition? I understand it is much
superior to the Petronix unit.
As to the Petronix unit, both on this list and the main Triumph list I
have read about its many failures. If one has a wobbly dist. shaft they
should have the shaft rebushed or purchase a rebuilt unit, not pay $75
for an unreliable ignition system that has no, or a very slight
performance advantage.
My $.02
Jim Davis
Fortson, GA
CF38690UO
CF37325U
Bernard Robbins wrote:
>
> Hi Guys,
>
> I have a Lumenition installed on both my TR6 and 2.5 PI Saloon. This is an
> optical based system with a sensor in the distributor and replaces the
> points altogether.
>
> The saloon has covered approx 70,000 miles without missing a beat.
> Originally my reason was to get around problems with a worn distributor
> drive which it did beautifully.
>
> Overall I get significantly better starting especially in the cold and a
> significant improvement in performance about 3500 RPM due to a stronger
> spark. The additional performance may be a function of the large intake
> area of the PI system and I don't know if you would get the same on a
> standard carbed setup (the carbed saloon cars seem to taper off around 4500
> RPM when they start to run out of breath).
>
> I have always kept a spare set of points and associated hardware in the car
> in case of problems but have never had to use them. It would take around 10
> mins with a screw driver and feeler gauge to return the car to stock.
>
> The only problem I have had was in the installation of the TR6 Lumenition
> with intermittant missing. The fault turned out to be an intermittant open
> circuit in one of the sensor wires. I simply replugged and have had no
> further problems.
>
> To give an idea of the additional spark, I tested before and after fitting.
> The spark at the end of the HT lead was blue up to about 5mm and could be
> stretched to around 10 - 12 mm length before it failed. With the
> lumenition, I can get a purple spark up to around 10mm and it could be
> stretched to around 55mm before it failed.
>
> Hope this is helpful...
>
> Bernard Robbins
> 1971 2500PI
> 1973 TR6 PI
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