DCOE & DCOM carbs

what is the difference between DCOE and DCOM weber carbs?

[papajam]

One difference I know of for sure is the DCOM has a diaphram type accelerator pump while the DCOE has a piston type. There could be other small differences as well but I think the carbs are 'basically' the same; twin choke sidedraughts with many interchangable parts (jets, chokes,etc.).

none of the suppliers i use for weber parts even list them, how common are they?

[roy]

I got a set of 40 dcom from Italy - great deal on e-bay- carbs were in great shape . I'm having a little trouble with the idle jetting . The idle system seems to be much more emissions happy ( lean) . I have had to make the idle jet ( f21-4 air holes) a size 70 to stop lean popping on mild acceleration . The idle jets on my 2 other Alfas with dcoe carbs are only size 50 . When the weather warms up I'll drive it more to see if the plugs are too black & what the gas mileage is . Elva Courier with 2L Alfa & 5 speed . Goes like hell!

Elva, MGB motor to Alfa that's one hell of an upgrade, whats it weigh? less than a GTA?