I'm not a super expert, but here goes
45 is the bore size. Different sized chokes are fitted depending on the
application. In general the smaller the choke the better the low end, the
bigger the better the top end.
The -XX has to do with the original equipment application for that carb.
A -XX might have been set up for Rolls Canhardly (rolls down one hill, can
hardly make it up the next) do all of the jets, chokes, emulsion tubes are
right for that engine. If you are putting a -XX on you car some or all of the
calibrated parts will need changing.
Remember high school algebra where you had trouble solving with 2 variables?
With a DCOE you have 7. Have fun.
Sent from my iPhone
> On Dec 28, 2013, at 21:50, Dave Murphy <roadwarriordave@hotmail.com> wrote:
>
> Just curious as may be many others as to what all the numbers mean on a
Weber
> DCOE carburetor. I thought I understood them a little, but now I'm really
> confused!
> I thought 45 was the throat diameter in millimeters, but are we to
understand
> that the choke is really 36 mm? Then what is 45? And to what does the 16 or
13
> refer?
> -Dave Murphy, Dearborn MI, '66 BJ8
>
>> Is there or was there ever a Weber 45 dcoe 16? "16"....not 13? I have a
>> fellow on eBay who said that he had a pair of 45DCOE "15"s. I contacted
> him;
>> he came back and said "oops I meant "13"s". Now he's emailed me and said
he
>> has one "13" and one "16". Maybe there was a 40 DCOE 16 and he's got the
>> wrong top cover.....
>
>> I'm going to meet a guy tomorrow to look at some Weber stuff. We're
talking
>> DCOE 45s here....are all 36mm chokes the same? Yes, they may all be 36mm,
>> but, if I buy 3 chokes out of his bits and bobs drawer, will I find it a
>> battle to find more identical 36mm chokes?
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