Does anyone know the difference between Webber DCOM and DCOE carbs. The DCOEs seem to be the common ones, but we have a pair of DCOMs (picked up cheap on ebay).

I would guess one is (M)anual choke and the other is (E)lectric choke.

That sounds very plausible.. anyone know where I might be able to confirm that?

But I have also heard that one is the part originally supplied on vehicles, and the other is the after market equivalent. Means garages know it's not under their warranty. (bit like prescribed and non prescribed drugs having different brand names)

don't know the difference, but DCOE's don't have electric chokes, there cable 4 sure...

oh and defo not E= economy..lol

Here's a refernce to the subject
http://www.jsoclub.com/forum/viewthread.php?tid=1677&page=2

Not that easy to understand, but the 8th entry asks the question, but the answer is "I suppose that the dcoe are more recent therefore more reliable".

Also found that the 'E' may mean die cast ..

However the most detailed answer (and probably correct is)

"WEBER 40 DCOE: float in brass and pump system has integrated return.
WEBER 40 DCOM: float in plastic and exterior return pumps
Fuel regulation is identical"

If anyone speaks better French than me, the link is http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&threadm=kzhU3.2048%24HC5.7540807%40nnrp1.proxad.net&rnum=2&prev=/groups%3Fq%3D%252Bdc om%2B%252Bdcoe%26hl%3Den%26lr%3D%26ie%3DUTF-8%26oe%3DUTF-8%26selm%3DkzhU3.2048%2524HC5.7540807%2540nnrp1.proxad.net%26rnum%3D2

We found that post too (the French one)... daft question but how can you have a brass float?

Thanks for all your help, I guess we will just have to try them and if we have no luck splash out on a pair of DCOEs

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We found that post too (the French one)... daft question but how can you have a brass float?

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I knew the explanation had to be a simple one! Always nice to know these things

well if they can make boats out of concrete why was a brass float so wrong sounding????

concrete boat!! thats supposed to be a secret err mmm. how did you hear about it. local weber dealers will reveal all about dcoe/dcom

theyre actually quite common the hull is made by by pouring concrete into a mould just

did you people ever find out most about DCOMs

and can the trumpets from DCOEs fit

as i am having problems getting trumpets for DCOM

I don't think they will. Have a look at this page. There is aa sales email address that might be worth a try
http://www.carbs.net/Weber/stacks.asp

errr, didn't we agree the difference is in the concreate float and external pump . .. .

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theyre actually quite common the hull is made by by pouring concrete into a mould just

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probably do that for smaller ones or sumit

i remember as a kidd a boat that used to sail up and down the bann the guy got it as a bare hull for next to nothin, there was a slight kink in it where the mould shiffted b4 it had all hardened but unless u were told bought it u would never had known

I remember my technology teacher at school making a concrete barge using a mould, trouble is they went to launch it and didnt support it properly in the middle and it cracked when it was in midair, and collapsed in the canal, and entangled him in the rigging and nearly drowned him!

on a useful note it can be quite wrong to say that they use a lot of fuel. The trick is to set them up properly and the adjust your driving style. I used to run a home brewed Mk1 cortina (yeh I know But don't start laughing yet) engine was 1640cc kent xflow 711m block.
lotus twink pistons (powermax) with the pistons machined flat and the block machined down to give 11:1 c.r.
all moving parts lightened & balanced.
head was full race and also flat.
Cam shaft was 1/2 race and valve train was kept under control by a Piper Ladder Rocker box.
Flywheel was machined down to half weight also (better pick-up & acceleration).
Lotus twincam Distributor with electronic trigger firing a high energy ignition system. All this was Fueled by twin 40 DCOE's.
Never did get any rolling road figures - but - 30 MPG at 80mph and about 20mpg round town.
As for go well Top end 140 & faster than 2.8i capri on acceleration 30mph upwards.

The trick to getting ecconomy is to remember that when you move the throttle pedal you get not 1 or maybe 2 squirts of petrol but you get FOUR. The trick for economy is to gear the car for flat out road use and control your speed with the gearstick not the accelerator!.

Big down side was 20k to a gearbox rebuild ( bearings couln't take it). in the end I could remove/strip/rebuild /refit gearbox in 1.5 hrs (no ramp or pit)