Sunbeam Alpine: Fitting and Understanding Twin 40 DCOE Weber Carburettors

This video includes a complete strip down and explanation of Weber Twin 40 DCOE carbs by Weber enthusiast Trevor Hibdige. Trevor rebuilds and tunes DCOE carburettors, he machines and 3D prints unobtainable parts for them and is able to resolve all of the usual issues that these carbs present. It is a long video but has been edited down from several hours of conversation and demonstration. If you want to understand carburation better or if you are a DCOE enthusiast, this is a video that is worth settling down and watching.

[drinksphotographerwarrenry]

Fascinating video and explanation of how the Twin 40s work, Trevor's knowledge on these is amazing, well done and thank you.

[obieoberstar]

This video is a must watch for Weber owners. I am sure that the theory applies to the IDF as well. Thank you for putting this together.

[corbishj]

Fantastic video. The comment about DCOEs always smelling of petrol because of their float chamber venting solves the mystery of why my Escort MK1 '70 needs the garage doors and windows open after a run out.
Thank you

[bobspeller]

Great review of how the Weber carburettors work and shows how we can all improve our cars running. Thank you for this video. Cheers Bob

[thibdige]

It was really fun making this. We hope you enjoy watching. Take it in blocks or get a big glass of your favourite tipple....

[Know-Expert]

I just watched all this very interesting and very informative video even though like Tim I’m going for the club Weber. I picked up some tips and also info on what to avoid when installing my carb when it arrives. Thanks Tim and Trevor

[geraldelwood]

Thanks for all this wonderful info.
Hopefully it will all be relevant for my Alfa 105 with 40 DCOEs

[gypsyjohnss]

Thank You for a very educational video.
I have 3 Weber DCOE 40 carbs on a Datsun 240Z
The car came with a mechanical and a electric fuel pump..
My problem is cold starts after weeks or long storage times
To start, i run the electric pump for 10/15 seconds then turn the engine over and pump the gas.
Get a lot of bucking.until the engine smooths out. I some times I can smell a small amount the fuel when before starting.
I think the fuel is evaporating from the carb bowls.
Thank you for any help you can provide

[evotoadracekartscars.]

Hi Trevor, I might have an interesting one for you.
Go kart.
250cc
Twin 4stroke
13000rpm
45dcoe 152
40chokes.

At present in starts, idles and pulls away. Bottom end is there, top end is to.
Got to fit an anti surge gasket then out to finish the mid range. Jetting is interesting.

[biddlelove]

I've just bought some reconditioned twin weber 40s, I want them fitting to my pre crossflow cortina mk1, one of them has no 998on the top, the other one has no 8l on it, I wasn't aware there were different models, I thought they could just be re jetted to suit, these carbs don't have the extra hole at the front, but when you go to the burton power website and look at the ones for the pre crossflow, it has the extra hole on the front, can you advise weather these carbs will work? They have been professionally cleaned and restored.👍👍👍🇬🇧🇬🇧

[rctlogistics]

Hi, I could not find Trevor‘s email in regards to this specific Weber carburetor that I have is there anyway you can provide that to me. I have a few questions that I’m hoping he can walk me through.

Thx I thought his email was going to be provided somewhere in this video description but I can’t locate it. Any help would be awesome thank you so much guys.

[michaelannen]

How about trumpets that adjust as you rev

[garymoore]

thank you so much 4 this video u have educated a semi talented amerture is there anyone out there who has a inlet manifold suitable 4 a alpine 😁😁

[Vwredstar]

Hi ls trevfor available to help me with a Webber 45dco. It’s leaking fuel, it’s on an old race car called RAM 35, Austin healey it’s been stood for 20 years