I think I have a 1.6 Murena engine in my garage (purchased from Zac Marshall in the UK some years ago). Can anyone confirm the specification from the following information please?
Engine number: OD - 0098 00539
Single carb type: 86 DCNVA 11 - 100 9D, made by Bresser (Weber licence?)
Andy
Whilst I know this is an old posting, I picked it up as I was doing a search on the 36 DCNVA carburettor whilst doing a job on a Murena 1.6 recently, and I thought I would answer this query from Andy for completeness of information for anyone with a 1.6 Murena, or indeed any other carburettor engine.
First the engine number. The initial letters '0C' or '0D' indicate the year it was made, just like the date code in the chassis number or VIN. So a 'B' indicates a 1981 build, a 'C' is a 1982 and a 'D' is a 1983 manufacture.
The carburettor type on a 1.6 Murena is a Weber 36 DCNVA 16/100. As with other Weber carburettors the base carburettor has a type, in this case '36 DCNVA' and the actual specification in this case '11/100' denotes the various jetting of that particular carb. and therefore the car/engine for which it was originally set up.
So an 11/100 would have had 28 mm venturis, and 40 idle jets as two examples, whilst the 16/100 that was fitted to the 1.6 Murena should have 29 mm venturis and 42 idle jets. All the other specifications would be likely to be different as well, so the main jets, emulsion tubes, air correction jets, pump jets etc. are probably all different.
The 11/100 is for a smaller engine and probably comes from a Simca with the 1442 cc which is why it has smaller venturis because it would not require the volume of air that the larger 1592 cc engine wants. So you could not simply fit a 11/100 on a 1.6 Murena and expect it to work just like the original 16/100. Obviously you can change any of the variables and convert the base carb. to what you want, but that could be costly. You might think 'well I can simply swap all the bits over from the original carb.' and that may be possible, but you have to ask why then are you fitting the other carb? The parts you are swapping over are probably worn and causing the very problems you are experiencing that is leading to you fitting this other carb. So you may gain nothing. Better to repair the carb. you have.
Obviously if you don't have the right carb. in the first place or it is broken physically in some way, then getting a similar base carb. and rejetting it to your requirements is fine, but as stated it will cost you for all the new venturis, emulsion tubes, jets, etc. that you will need plus a gasket and seal overhaul kit.
In a similar vein, the Murena 2.2 was fitted originally with a 34 CICF 141 Solex carb. There are again variations on the base 34 CICF carb. and one fitted to a Citroen was a 34 CICF 161 which has different settings and cannot be used on the Murena without changing the settings.
Where you have to be careful is that some base carbs. have certain things fixed which cannot be changed and therefore make them unsuitable. The Solex 34 CICF is one such case and some Webers made for Ford also have cast in venturis - it is done for cheapness. When the venturis are fixed they cannot be changed so if you have a version with small venturis and you want one with larger venturis or vice versa then you cannot adapt the carb.
Hopefully this explanation will help you understand a little more about carburettors.
Roy