Scalextric + 2cv = ...enormously expensive BMW concept!

Thanks cupcake, I might take you up on that come the spring if. Don't sack the old crate off. Much love.

No Problem,
Its a dyane carb, but failing that working feel free to pinch the known working one of for mot purposes

James,
no such thing as a Dyane carb, exactly the same item was fitted by Citroen to 2CVs, Dyanes, Amis, etc. at various times...

ken

Thought the jetting was different?

Nope,
should have been, to compensate for that 'forced induction' on Dyanes and Amis, but it wasn't...

ken

Really, please explain 21-24 vs 18-26?

IIRC
Some Dyanes had 18/26 the later ones.
There are lists of applications with differing engine types AM2-M28, AK2 M28/1 for Dyanes and AK2-M28/1, A06/635 - M28/1 for 2cv6. Carbs are listed with myriad applications and serial numbers (presumably for the miniscule jet changes and location of various adjustment screws and linkage types) and we will not even get into the various permutations of van engines with and without 9:1 pistons

"18/26" and "21/23" refer to the veturi bore in the two types of carb its easier than the "34 pics/pcis-123/ 124" that Solex gave to them. Its also cast into the side of the body and so is permanent, unlike the tin tag with the solex details on it that eventually falls off. Think its a UK racing thing where both carbs were permitted and so it was easier to say 'yeh, we're running a 21/23' or were running a "Dyane" carb

Its common to say that the 21/23 is a "Dyane" or "Ami "carb because thats where you are likley to find them and where most of them went, but the Dyane also came with the 18/26 towards the end.

The 18/26 is commonly referred to 2cv (D*lly) carb because it has them untill the end

I also think that some of the middle 2cvs came with the 21/23 around the disk brake and flywheel changes time.UK market was odd as some cars were built and stuck in storage for a while and so the year of registration and the build year were different.

Im pretty sure the jets remained the same if the 18/26 carb was in a Dyane or a 2cv, jet sizes are determined by the venturi of the carb but im not going through pages of carb spec and jet sizes just for an "angels dancing on the head of a pin" type discussion

Enjoying the heat in Aus?

Do you get the feeling some folk are not speaking to each other?

Hi Sean,
to fill in a few dates, twin choke carburettors were fitted to 2CVs from 1978.
(Wonder if Citroen had crates of them lying around with the demise of the Ami?)
From 1980 onwards, the 21-24 type carburettor was replaced with the 18-26 type on both 2CVs and Dyanes.

Jetting on the 21-24 type was 120 (or occasionally 125) primary and 70 secondary, whereas the 18-26 type had 102.5 primary and 87.5 (or 90) secondary.

The Dyane which I bought new in 1980 would not run properly on a light throttle with the original jetting and after Citroen had tried 2 replacement carburettors under warranty, I ended up rejetting it myself.

That's some answers so here's a question to keep things going...
Why do you think Citroen 'detuned' the Dyane engine from 9.0:1 to 8.5:1 when is was fitted in Acadianes, identifiable by its purple/lilac engine number plate?

ken