Citroen Specials Club - the club for all lightweight cyclecars

Hello folks, and happy New year to all!.
Currently running a well used Solex twin choke 24/ 21, fitted to recent rebuilt 602cc, with higher compression pots, 123 ignition, super coil and partially lightened flywheel.
recent spare engine acquired has a grubby 26/18 twin choke Solex.
Question is, which carb is best suited to my engine?
Anyone had any practical experience with both types?

Thanks in advance for any feedback...

Rob.

Ken Hanna will be able to give you advice on this. Given all the other mods, I'd swap it for an SU personally.

Rob,

Ken's advice to me was "the change from the earlier version of the 26/35 carburettor (with 21 & 24mm throats) to the later type (with 18 & 26mm throat diameters) was made by Solex, not Citroen." (see viewtopic.php?f=7&t=688&sid=aa7b01c6333 ... ec67dc8f99)

The inference could be that Solex knew something about improving the performance of the carburetter, hence, the later 26/18 Solex could be better. Also, if you're running a higher compression ratio, a 26 mm choke would enable you to exploit the potential additional power at the top end of the engine speed. The 18 mm choke, I would guess, should make the engine more responsive (than the 21 mm choke) at the bottom end.

Give it a try and see; let us know what the results are.

Hi Rob,

Did you change to the 18/26? I'm considering replacing my 21/24 carb and wondered whether you feel it's been an improvement.

Hello Highwaylass.

I have only just got the car back on the road this week, after a 2 year rebuild, 7 years since last MOt, all went well.
I am running the 21/24 at the moment, just to get a feel for it, and once everything has bedded in, I will fit the 18/26 that I have just got back from Gower and Lee. looks great.
Will keep you posted...

Rob

Having run the rebuilt engine for about 300 miles on the old carb, I have now swopped for the 18/26 unit.
Initial feelings are that the engine seems perkier at lower revs, and will pull a little better above 50 Mph.
Some of this improvement may be down to the fact that the old carb was past its best, and the replacement 18/26 has been refurbed, but still I think it was worthwhile...

Rob