I have attached a picture of the rotor button you need for the Marelli S 129C distributor, which I think is the same as you would have in the Jarama (I have an early S2 Espada). You can occasionally get them on ebay, I couldn't see any on their at present. The other option is to remove the distrbutor all together and go with an electronic ignition system (I am in the middle of this process at present) I went with the XDI ignition system, Chad on this site sells them.
Best of luck
Mike
This part MAY serve the same purpose not sure how it fixes to the shaft though it seems to have similar dimentions and I believe the Jag v12 distributor caps can be used on the lamborghini v12's also? If the auctoin ends it is for a Jaguar XJS Marelli Ignition Rotor
Ted,
I found this link which shows the Jag rotor button in some detail. looks like it would need some modifications to make it fit but it would be a good starting point Marelli Cap & Rotor
Mike
Need the firing order and cylinder head number order for a 1972 jarama. Not sure I have the distributor wires in the correct order. Which is cylinder #1 and so on. thanks
For reference I'd like to post the findings on how we found the firing order experimentally:
If you number the cylinders 1-6 on the passenger bank 1 being the cylinder in the front of the car, and 7-12 on the driver bank with 12 being the cylinder in the front of the car. The firing order is:
1-7-5-11-3-9-6-12-2-8-4-10
____
rear
6 7
5 8
4 9
3 10
2 11
1 12
Front
I color coded both sides to segregate the banks. If you concentrate on the 1-6 numbers you will notice that it is the same firing order as any old inline 6 cylinder engine (chevy, jeep, etc.). infact 7-12 is that same firing order if you match those up, so all you're really doing is mashing two 6 cylinder engines together (stupid simple).
All day we've been following other folks' firing orders trying to get this ol' lambo running. When we finally did the engine was maybe running on 6 cylinders tops, but in those few moments we did have it running the firing order seemed to come to us as if we could hear every backfire in slow motion. When the firing order of a standard 6 cylinder was brought up I immediately checked to see if the engine would fire in a balanced order. Sure enough 1:7 oppose in a cross; 5:11 oppose in a cross... etc. etc...
After today I've noticed many folks are confused about their firing order on many different models. Hopefully this post might make it across the forum to those who need it.
Interesting colour choice, look forward to seeing the wheels on the car :tup:
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