How is it with distributors for 2,2 Murena? I know that 2,2 S has different distributor than 2,2 but on my 2,2 S there is Ducellier and maybe it's not right, because I think that there have to be Bosch, or is it possible, that they mounted both of them? Can I find somewhere the right OE number for 2,2S distributor and which OE is for distributor for normal 2,2?
The standard 2.2 had a Bosch distributor, whilst the genuine 2.2S had the same distributor as fitted to the Tagora made at that time - i.e. a Ducellier. The publicity stated the 2.2S had a distributor with modified timing characteristics (implying it was to suit the extra power) and I say that is BS. They simply standardised on the same unit in both Tagora and Murena. It had different characteristics simply because one was made by Bosch and one by Ducellier! The Prep 142 used the standard Bosch distributor and both it and any Holbay cam modified 2.2 run absolutely fine on it. Even engines I've seen producing up to 150 bhp run fine on the Standard Bosch unit.
So if you have a Tagora engine fitted (as many Murena now have, after damaging the original engine) they will probably have the Ducellier unit similar to the genuine 2.2 S model, as it has come from a Tagora. Or maybe the Bosch was worn and instead of repairing it someone picked up a second hand Tagora unit which was the Ducellier not Bosch.
So OE distributor on a standard 2.2 Murena was a Bosch
and OE distibutor on a genuine 2.2S Murena was a Ducellier
See the parts list for confirmation!
Update: I know the Ducellier fitted in the Tagora and Murena had slightly different vacuum and mechanical advance specifications but then you would expect that for a heavy saloon car and a light sports car respectively. And the vacuum and mechanical advance specifications are also different if you compare the Bosch and Ducellier fitted to the Murena and 'S'. But overall the differences are negligible if you add the two advance curves together. And in practice this also shows in that the car drives fine with either too.
It should be noted that sometimes one or both of the advance springs should be loose when fitted and the advance weights are at their resting position. This is so it will take some additional revs before they start to increase the timing advance. Also you would expect the idle and pick up on a saloon car to be different to a lighter sports car as it is aimed at giving a smoother drive for a saloon car driver with probably a family on-board. A sports car is more about power and performance, thus the specification is tuned more for that.
Roy