I wrote a question about Weber 34 DMTR on the native forum, but no one has answered me on this there, so I try to move this question here:
I have obtained a Weber 34 DMTR carburetor from a Citroen CX 2.2 1986 mod. with manual choke.
Sorry but that is not enough information on the Weber to know which one you have got.
There are lots of variations on the Weber 34 DMTR so you have to be more specific. Some will suit the Murena 2.2 better than others. I have a 28/250 with slight mods. and it suits my Holbay 58C cam engine perfectly now.
But there are other versions such as the 21/200, the 28/200, the 46/250 etc. etc.
These Weber carbs have the venturis cast in so are not interchangeable. The original Solex 34 CIC had 25 and 26 venturis, whilst the Weber I use, the 25/280, has 23 and 26 venturis. Some have different venturis such as the 35/350 which has 23 and 27. Some have a vacuum take off (for the distributor advance) some do not.
The one I chose did not have vacuum advance outlet so I modified it and made one. I then increased the secondary main jet as the one in the carb. was too small. Now it runs well, drives smoothly at low speed, progresses smoothly on acceleration, and gives even slightly better economy, no doubt owing the the smaller primary venturi. But flat out it it can provide the fuel to reach a top speed of 218kph/135mph with my high fifth gear so I know it works fine.
Is there any difference in performance / consumption with Weber carburetor compared to the original Solex?
If both are in good condition, there should be little difference really. But as the Solex wears (and it does) you cannot get spares for it that easily. The Weber is better as you can get spares.
Roy