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Author Topic: New Murena owner on forum/carburetor problem  (Read 16921 times)
variator
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-83 Matra Murena 2.2


« Reply #30 on: January 06, 2014, 09:03:07 pm »

A question to you Oetker: I can see that you have installed a (one way?) filter on the vent hose from the crankcase to the air intake, what intent has this filter and what is the advantage of this compared to the original mesh filter?
« Last Edit: January 06, 2014, 09:05:44 pm by variator » Logged

2001 Saab 9-5 2,3T, 1981 Porsche 928, 1981 Honda cb 900 F, 1968 Triumph Trophy TR6R, 1986 Yamaha RD 350 YPVS
Oetker
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« Reply #31 on: January 06, 2014, 09:16:47 pm »

There is not much advantage in that filter but I found the old one a piece of sh*t.
The only thing is that the air from the crankcase will be filtered a bit better.(cleaner).
Disadvantage, that it need to be replaced on regular basis.

Herman
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I feel like Jonah, only my fish looks different.
Murena 2.2 Red 1982. Murena 1.6 black on places.
variator
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-83 Matra Murena 2.2


« Reply #32 on: January 06, 2014, 09:27:09 pm »

Actually, one should have vented the crankcase right out in the open air, but this may not be in accordance to current government regulations? Wink Cheesy Grin
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2001 Saab 9-5 2,3T, 1981 Porsche 928, 1981 Honda cb 900 F, 1968 Triumph Trophy TR6R, 1986 Yamaha RD 350 YPVS
Oetker
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« Reply #33 on: January 06, 2014, 09:34:59 pm »

Actually, one should have vented the crankcase right out in the open air, but this may not be in accordance to current government regulations? Wink Cheesy Grin
That is what they did in the 60s but indeed, the rules.

Herman
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I feel like Jonah, only my fish looks different.
Murena 2.2 Red 1982. Murena 1.6 black on places.
variator
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-83 Matra Murena 2.2


« Reply #34 on: January 06, 2014, 09:41:02 pm »

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.
This I intend to try on my Murena 2.2. Is there anyone who has tried this and know if I have to do a lot with it to use it on my car?
Think reading that Weber carburetor in Citroen CX do not have outlets to the vacuum-advancing mechanism in the ignition.
Is there any difference in performance / consumption with Weber carburetor compared to the original Solex?


Regards
Terje
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2001 Saab 9-5 2,3T, 1981 Porsche 928, 1981 Honda cb 900 F, 1968 Triumph Trophy TR6R, 1986 Yamaha RD 350 YPVS
Oetker
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« Reply #35 on: January 06, 2014, 10:00:20 pm »

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.
This I intend to try on my Murena 2.2. Is there anyone who has tried this and know if I have to do a lot with it to use it on my car?
Think reading that Weber carburetor in Citroen CX do not have outlets to the vacuum-advancing mechanism in the ignition.
Is there any difference in performance / consumption with Weber carburetor compared to the original Solex?

Regards
Terje

Roy experimented with it in the past but was not satisfied  as I believe.
On my 2.2 there is a new carburateur.
It's a Solex from a CX2200.
There is a gap in acceleration around 2000RPM.
I think I go back to original.

The original has written TAL CIC34-141
The Citroen has written CIT CIC34-161

Herman
« Last Edit: January 06, 2014, 10:02:48 pm by Oetker » Logged

I feel like Jonah, only my fish looks different.
Murena 2.2 Red 1982. Murena 1.6 black on places.
roy4matra
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« Reply #36 on: January 22, 2014, 12:58:27 am »

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.

Quote
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
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variator
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-83 Matra Murena 2.2


« Reply #37 on: January 23, 2014, 08:02:20 pm »

Thank you Roy!

The marking on the carburetor is: 34 DMTR 110/100 2 6D

I am attaching a couple of photos.
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2001 Saab 9-5 2,3T, 1981 Porsche 928, 1981 Honda cb 900 F, 1968 Triumph Trophy TR6R, 1986 Yamaha RD 350 YPVS
roy4matra
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« Reply #38 on: January 23, 2014, 09:14:16 pm »

Thank you Roy!

The marking on the carburetor is: 34 DMTR 110/100 2 6D

I am attaching a couple of photos.

The specification is not one I have come across before, but I can tell from the photos and some of the pieces such as the diaphragm linkage that it is an early design.  I have now found the specifications of that version, which probably comes from a Lancia Beta.  I see you say it came from a Citroen CX2200 which is odd since the version I have is from that car and it is not the same version.  The first thing is that it looks like the secondary venturi is vacuum activated rather than a direct linkage.  You should check how tight a fit the auxiliaries are.  Any wear and slackness of the auxiliaries means the carb. is not likely to be much good.

When you strip it down to clean it, make a note of all the jet sizes etc. that would also be useful to cross check against what I found: note down both primary and secondary idle jets, main jets, air correction jets, emulsion tubes, starter jet, needle valve and bleed.  Also check that the float is still sealed so no fuel can enter it, and the diaphragms are O.K.

I can't tell from the photos which are too small and low resolution but does it have a vacuum advance take off?  I don't see one.  If you can fit and connect up everything correctly, according to the spec. I found it may work reasonably well.

What is the problem with the original Solex?  Can that not be cleaned and re-used?  In good condition these give good performance and economy.

Roy
« Last Edit: January 30, 2014, 12:16:46 pm by roy4matra » Logged

variator
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-83 Matra Murena 2.2


« Reply #39 on: January 30, 2014, 12:26:05 pm »

The original Solex carburetor is in pretty good condition and the Weber was acquired when I struggled with the many leak in the vacuum system. Solex carburetor sitting on the car is overhauled, it seems, and is not particularly worn. I'm not going to put much effort into the Weber, as long as the original work.
 
I was also lucky enough to get an extra Solex when I bought the car and I'm going to give this a full overhaul too, so I have an option to switch to.

It looks like I have an extra Weber carburetor for sale if anyone should need it. Wink
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2001 Saab 9-5 2,3T, 1981 Porsche 928, 1981 Honda cb 900 F, 1968 Triumph Trophy TR6R, 1986 Yamaha RD 350 YPVS
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