Hello! I have a 1974 Bagheera and I would like  to have just a little more oumph in the engine. Does anyone has some nice links or other tips for me?

Kind regards Ken Håkansson, Malmö, Sweden

It's good to know they did supply the correct 34/34 carburettor.  It did seem strange that if you specified it was for a 1.9 they would have sent one for the lower powered smaller capacity engines.

The new chassis plate looks good Terry.

Roy

RELAX, BREATHE and be HAPPY....

What a relief. Solex obviously knew what I wanted when I said 405 1.9.
This took a vast amount of searching, following links and generally getting confused on the interweb.
Found three numbers hidden behind the choke mechanism (611) which identify it as a 34 / 34 carb (doesnt specitfy Z1 or Z2. Believe it or not I eventually found that on a Volvo website!!!) The order number on the invoice is not an order number as it says but a model number (9422212900) Identifying it as (suitable) for  405 1.9. after further cross referencing it is also used on citreon BX 19.
I have however not been able to ascertain the jet sizes. I even removed both main jets and neither is marked.
On the down side I have discovered I could have got it a hell of a lot cheaper!!!!!
But to end on a positive side................... My reproduced chassis plate has arrived, and...... Alaine has informed me the other plates should be ready in a few weeks but judging how long it took for this one I wont hold my breath.
Thanks again Roy. At least i can relax (til the next time)
Just waiting for the new gaskets and cable adjuster so I can fit it.....................................

First you can't measure the barrels and expect that to denote the specification in any way.  The venturi size is at the narrowest point down inside the carb, and if the venturis are cast in, then you will usually find the size cast on the outside of the carburettor casing, if you look carefully.  But even if the venturis are a particularr size, the jetting can vary to suit different engine specs. which is why all new carbs have a small tag attached to one of the casing screws with a coding which tells you exactly what the specification (all the venturis, jets, emulsion tubes, floats etc.) is for that particular version of the carb.  In the pages from the workshop manual I sent you, you will see that the Solex 32/34 comes in about 4 or 5 different specs. depending on whether it was fitted to a 1.4 or 1.6 and whether it had an auto box, or air con. etc.  There is never just one specification for a particular carburettor.

The figures you need first are the venturi sizes.  If these are correct then the exact jetting is the next things to check.

If you had checked my website and the FAQ about Solex carbs. for the Murena 2.2 you would have seen how the correct one was the 34 CICF 141 and that some people were sold a 34 CICF 161 which is not set up for a Murena and although it might look the same, was for a particular Citroen and does not work correctly on the Murena.  The specification is all wrong.  This is the same with any car/engine/carburettor.  You need the correct one specified for it.  In your case, for a Citroen/Peugeot 1.9 engine there will be numerous Solex and Webers that were fitted to cover different versions, whether manual or auto and with or without air con. and even the date when produced is important as they had to meet varying emission levels.  They were usually Solex 34/34 or Weber 34/34 on a 1.9 litre engine, and if the one you found fitted to your Murena when you first got it was a Weber 32/34 DRTC maybe even that was an incorrectly fitted one anyway.

Does or did that 32/34 Weber have the code tag?  What is the new Solex code tag?  These are the things you have to go by, when investigating fitting a carburettor, especially when it is to something not originally designed with either this engine or carb.

Roy

That is not what I wanted to hear Roy!!!!
As you know I couldnt find a webber 32 /34 DRTC anywhere. This is what was fitted, so went for a solex equivalent which was also one of the carbs listed in my PUG 405 manual When I ordered it I did specify it was for a 405 1.9 XU92C engine but there are no casting marks on the carb so am assuming it is a 32/34 z1. I have just measured both barrels and they are both 34 so the plot thickens. I may have to get a different carb then, but will see what it runs like once (if) I ever get it running.
On a similar vane when I removed the 32/34 DRTC the manifold had a heat resister block and then a restrictor plate!!!!! Was seriously thinking of not fitting this back on, what do you think?

I'm sorry you probably have an unsuitable carburettor for your 1.9 litre engine.

The Solex 32/34 Z1 is for the smaller capacity engines such as the 1.4 and 1.6 litre and has smaller primary and secondary venturis which will restrict the 1.9 litre engine.  The correct carburettor for a 1.9 litre engine would be the Solex 34/34 Z1 or Z2.  The 34/34 Z1 has 26 primary and 27 secondary venturis which will be able to satisfy the air demand of the larger engine.

The smaller Solex 32/34 Z1 will also have unsuitable jetting and emulsion tubes, and all would need changing, but since I suspect the venturis are cast in, and cannot be changed, changing the jetting would be a waste of time and it means the carbs. are unsuitable.

Roy

The original fuel tank sender and tank could never show the true amount of fuel in the tank because the top of the tank has a much wider and larger cross section than the lower part, but the sender rheostat is linear.

So the fuel will drop slowly when it is still in the larger top section than when it is in the lower narrow section.  This has all been explained in my technical article on the fuel system which has been on my website in the technical article section for some years.

I stated that if you were on a long jouney with a full tank, you might get 340 kms whilst the gauge dropped slowly for the first 'half' but then only get 200 kms during the second 'half' from half way to almost empty.  This is due to this linear sender but irregular shaped tank.

The other problem is that all the Murena I have ever come across have a sender that has the float too high at it's minimum, so it gives you a false early warning that you are almost out of fuel.  I have reset all the senders in the Murena I have owned so they are more accurate in telling you when you are almost out of fuel, and do not give that flashing low fuel warning light, much too early.  Consequently I can get as much as 550 kms safely on a full tank before I need to refill with fuel even at my fast pace, and have done so many times.  When driven at no more than legal speed limits in the U.K. and France I have actually achieved 700 kms once or twice.  This is with a 2.2 Murena with a Holbay cam and 140 bhp!

Anyway, please download my technical article (if you haven't already) on the fuel tank and system to find out more.  It might surprise you.

If you really want the fuel gauge to give you a more accurate reading all the way from full to empty, then there is an electronic device you can fit and set up so it will be accurate at full, 3/4 full, 1/2 full, 1/4 full and empty.  Contact me (at my domain email not here) if you wish to know more.

Roy

The tank floater can lie about the real content of the tank if it is bend and not anymore in the original curve, or if the floating piece has some liquid absorbed in the years and is not empty itself which causes it to sink deeper and giving on the fuelmeter the idea there is less fuel in the tank than in reality. (Anyway, the second situation is the case with mine.)
Guido

Morning Anders, thanks for the info. My "Pug 405 manual" didnt list the jet sizes. I specified it was for a 405 1.9 with an XU9 2C D2A which is the same as a Citreon BX 1.9 TRS, although that uses a 34/34 carb. I havnt checked the jets and in all honesty I am not going to. I dont like messing with carbs. To me they remain a magical mystery and I dont delve in to the mystical arts!.
It is a little more problematic than just bolting it on but I had thought that the old carb had an adjusted welded on to save a few quid. I keep telling myself that when it had its conversion back in the very early 90's (91 I THINK) the interweb was relatively new and it was a lot harder to source parts or find "work arounds" I just spend a couple or hrs on the computer searching for what I need or think could work. Keeps me busy.
PS you dont happen to know the steering wheel nut size do you? When I ordered my wheel and boss I forgot the nut!!

It looks like a more-than-expected complicated venture. Good luck! You mentioned the carb is "generic" - did you find any information on jets, venturis etc? I googled and found this that lists a number of different configurations for different Citroen engines - I think yours may be among them:

http://www.bxclub.cz/files/pdf/carb2.pdf

/Anders