DCOE date stamps

[chris240]

I take it the letters on a weber carb relate to its date or year or "sequence" of manufacture...does anyone know where I can find some sort of index or explanation of the stamping of DCOE's codes ....ie dcoe23 ...etc 

I know that on SU's , a "HSU_6" is a current series carb..

[Thomo260]

I will attempt to make this as simple as possible. Using a 45DCOE9 as an example,

45= throttle plate size;

(In Italian)

DC='doppio corpo' or dual throat

O='orizzontale' or horizontal

E= Die cast carburetor (late Alfa E=trapezoid bolt pattern instead of square like DCO)

Any numbers following the letters are variations of the basic type eg. DCOE9 is a variation of a DCOE but there are 10 variations of DCOE9! You would never be able to chart weber carbies as they were built to what ever best matched the current need at the time. If he built a DCN type for a Lamborghini it became a DCNL, if for a Ferrari then it was a DCNF :-\

You should see the Weber family tree it's huge.

 

Thomo

[bluerat]

There used to be an old wifes tale that some numbers were better than others for performace aplicaions, that is, some numbers suit road cars, some numbers suit race cars, any truth in this and if so what numbers are the ones to look for??? although with 10 variations of DCOE9 this makes it all a bit hard?

 

Cheers,

 

Hodgo

[chris240]

Gents, So how do I tell the age of a particular dcoe, rather than its specs or what model car it came from..

Its like crackin the Davinci Code !

cheers.

[Thomo260]

I don't think there is a way to 'age' a weber carb. BUT maybe you could go by what type you have and refer that back to what vehicle that particular Weber is fitted to as OE, then you could get a period of time?

Having said that, I have just spent almost an hour trying to pin point some webers to car makes to give an example and not even that would work I am now thinking.

I am pretty sure the different numbers just give you an idea of what the factory settings are of that particular Weber. But since they get changed over the years from being on different engines they develop an identity of their own anyway.

 

What letters/numbers do you have on your carbs that you want to identify?

[chris240]

Thomo

I havent bought any just yet...Im on the market over the next month..So Im just "educating" myself before I buy. Its really hit & miss on age of webers by the looks of it..I could buy some that came off a 74 alfa or some that were purchased new in the late 80s' and I wouldnt know it..

Its a pity the aussie dollar wasnt back in the 90c as Id buy new from weber.com in California for under $500 au !!

 

[PZG302]

I wouldn't be too concerned about the age of the carby as long as they are in good condition and can be rebuilt.

 

I have just bought a set for my charger, just under $2800, for the three 45mm carbies, manifold, linkages, trumpets and jetted to suit a warm 265 to give a good starting point for the dyno tune. All the carbies are the same series, which is all I would really be worried about.

 

Between the different series you will get small variations in flow, but a good tuner will nullify these and get the set running sweet.

 

Also different set ups also ran mis-matched numbers, for example the six pack Chargers ran a different rear carby series to the two front ones as the flow was slightly different for the two rear cylinders, and that was without any vacuum plumbing as the VH Chargers ran un boosted brakes standard for the E38's and E37's. Chrylser spent a lot of time and money in sending a VG Valiant over to Italy to get the tune just right for the production version.

[Thomo260]

 

Also different set ups also ran mis-matched numbers, for example the six pack Chargers ran a different rear carby series to the two front ones as the flow was slightly different for the two rear cylinders, and that was without any vacuum plumbing as the VH Chargers ran un boosted brakes standard for the E38's and E37's. Chrylser spent a lot of time and money in sending a VG Valiant over to Italy to get the tune just right for the production version.

That's probably a good example for the different coding of Webers. Instead of rejetting 1 carb for every car on the production line, they just found one with factory settings to what Crysler needed for that specific application and saved alot of time and money buy just using off the shelf carbs.