The 'E' Type Forum

My car has Luminition ignition which is working without any issues but I think it was fitted when Adam was a lad so I will be looking to replace it before it tells me I have to
Question for all you guys who have already done this is which would you fit now?

kevh wrote: ↑

Sun May 15, 2022 6:48 am

which is working without any issues

If it works, I would leave it well alone.

My XJS has an older Crane XR700 system, and it is unreliable. I plan to replace it all with a Pertronix Digital HP module and Pertronix distributor insert.

If it worked however, I would leave it well alone.

I fitted the SNG replacement unit. The only change I would make is to go to a vacuum advance, mine is retard USA spec, and have carb drilled for that vacuum source. Otherwise their system has been great. I thought I was having issues with the module/igniter but I was having a vapor lock issue in hot weather.

Dennis

In my opinion the pertronix 9lu-1122a (Please note the "a" at the end of the part no is MOST important) is a very cost effective and elegant solution for the V12 now. Have not used it myself though.

I would recommend this upgrade be implemented with the vacuum advance module JLM519 on the dissy connected directly to manifold vacuum. Both my S3's run beautifully like this.

I fitted the Lumenition, the SNG and the Pertronix in the last 2 year, The Lumenition photo eye failed at 800 Miles and the customer service from the company in London is horrid. The SNG system is working fine, that dizzie was converted to Vac advance as described in a post above as have both dizzies and the Lumenition car now has Pertronix in it, the "less brainy" version.

I was very disappointed with the Lumenition as I had made a custom loom to mount their small amp up front so when I changed to Pertronix I added another pair to the Loom for that so I have the Lumenition system as a back up on the car and I carry a new photo eye around as well as a spare Pertronix. You may gather from all of this that I dont really trust either of them and plenty people say both have become much worse in failure rates. The Pertronix just completed 1200 mile trip so far since install.

In terms of cost Pertronix is far cheaper and simpler, one component when compared to the others, the SNG is dear but it features the dizzie and we did not trade ours in making it about an 1100 dollar job. This is worth noting, as when we immediately sent that SNG dizzie to the BVUnit to get its mapping checked and converted to advance, he reported it was fairly poorly overhauled.

Given all that my summary so far would be to go with Pertronix and get your dizzie mapped and converted for advance (with carb as required) and checked out by one of the good guys doing that on east coast. You could probably do that all in for under 600 bucks. Add the spare in the glove box and you might be at 750.
Cheers
NS

abowie wrote: ↑

Sun May 15, 2022 10:02 am

My XJS has an older Crane XR700 system, and it is unreliable. I plan to replace it all with a Pertronix Digital HP module and Pertronix distributor insert.

I've now been running the XJS for maybe 6 months with the Pertronics Digital HP and the Pertronix LU-1121A Ignitor Ignition Module.

I've been very happy with the result; the car runs flawlessly.