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Discussion Starter #1
OK, I have to show my Weber ignorance. The 1975 Nuova Owner's Manual I was just sent lists the carburetors as
"Weber 40 DCOE 44-45".
1) I thought they were all "40 DCOE xx" only two numbers like either 44 or 45 but not 44-45. What does this mean?

2) I look at what is on my new car ....... one I s 40 DCOE 44 and one is 40 DCOE 45!

I am confused!
 

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They are the same carburetor but with different actuator arms for the front and rear positions. Think of them as a matched pair. This is common with later model 40DCOE's.

There may be one more difference. I have a 40DCOE116/117 pair and the 117, the front one, has a port to the progression circuit on the front venturi. I have no idea what it is for and I have it blanked off.
 

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this is for a vacuum advance mechanism on the Ignition. 116 , Alfettas suchlike, have this..
Thanks for adding to my knowledge of these Webers. It happens a little at a time.
 

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I have that setup on the ca. 80 Alfetta engine in Pinyo but with Delortos. Plus some ancient Alfetta EI.
 
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