Weber designators

[DJ]

I've looked for a long time for info on what the Weber designators mean on their various carbs. I just ran across this small tidbit on a Citroen SM website in reference to the Weber DCNF carbs.

"DC in the Weber nomenclature means 'Doppio Corpo', so double throats (venturi's) in one housing."

At least I've learned a little something new today! :D

I'm sure someone out there should be able to add significantly to this thread. Anyone?

[Bazza]

I've looked for a long time for info on what the Weber designators mean on their various carbs. I just ran across this small tidbit on a Citroen SM website in reference to the Weber DCNF carbs.

"DC in the Weber nomenclature means 'Doppio Corpo', so double throats (venturi's) in one housing."

At least I've learned a little something new today! :D

I'm sure someone out there should be able to add significantly to this thread. Anyone?

In DCOE the O stands for orizontale - that's about all I can add.

[Will]

The Weber carb nomenclature has long been a mystery to me- I try to identify by cross referencing to the illustrated Haynes Weber Carburetors.
This useful little tome has a chart for OEM and conversion jet selection which some may find helpful, in addition to the usual rebuild procedures, etc.
It is obvious that weber produced a whole shitload of different carbs, and the ID scheme doesn't seem to follow any kind of order, probably a bit more if you speak fluent Italian- which I don't. But if you're wondering what it is that you have in a box in your basement, the Haynes manual may help.
-Will

[omicron]

DC - doppo corpio - dual throat
O - orizonatale
V - verticale
E - die cast
V - carb with power valve
A - water operated automatic choke

F - Ferrari (DCNF / IDF on Ferrari)
L - Lamborghini (DCNL)

[Bazza]

DC - doppo corpio - dual throat
L - Lamborghini (DCNL)

Agree with most of them except L for Lamborghini:

DCLs were used on some Lancia Aurelias and I believe it stands for leggera (light) as opposed to Z (for zinc) which was heavy.

[omicron]

Agree with most of them except L for Lamborghini:

DCLs were used on some Lancia Aurelias and I believe it stands for leggera (light) as opposed to Z (for zinc) which was heavy.

I'd agree with you that Lamborghini is likely to be inaccurate. I was quoting from an American book on Weber carbs. They also thought that the I as in 40IDF was for Inverted - ie an up-draft carb rather than side-draught or down-draught, but the IDF is a downdraught carb.

They surmised that the F and the L on the DCN series stood for Ferrari and Lamborghini!

Maybe its merely a lucky coincidence that the author read more into than was actually there!

[Will]

IS there an updraft carb?
That would help me out a lot!
-Will

[Bazza]

IS there an updraft carb?
That would help me out a lot!
-Will

I've seen updraft carbs on a Delage D8 (1931 vintage) but they were bronze and made by Solex - not what you are looking for I suspect :lol:

[DJ]

IS there an updraft carb?
That would help me out a lot!
-Will

Yes. It's called a Carter. :P

[Shant Fabricatorian]

Just interested if anyone knows what M or T or R stand for, as in DMTR, the original carb fitted to stock Betas?

This carb was later changed (with the advent of emissions stuff) to DATR, but mine has a different one again, it's a 34 DATA 4, I believe that's because it's an Australian-spec one. Same difference really, only difference as far as I can see is a different location from the DATR for the idle adjusting screw.

[77scorpion77]

Ferrari used DCNF and a similar, earlier version with three instead of four base mounting holes called DCN. Early Fiat Dino motors also use DCN(Ferrari Dino uses DCNF). I'm not sure "F" stands for Ferrari... I've also seen Maserati with DCNF. Ferrari themselves often use random numbers and letters to match sets of parts together - maybe "F" was just a random letter to designate 4 hole base carbs?

[DJ]

The "M" in DMTR stands for "manual" (or at least the Italian equivalent) as in manual choke. Accordingly, the "A" in DATR stands for "automatic". The "E" on a carb like the DEGV stands for "electric" because it has an electrically actuated choke.