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DCOE 40’s on 1982 CVH #659751
01/09/20 07:17 PM
01/09/20 07:17 PM
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Ian jackson Offline OP
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Ian jackson  Offline OP
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Hi,
Brand new to the site following a recent purchase of a 1984 +4 four seater. The car is original with 1.6 CVH engine but I would like it to drive a little more like a sports car. The cylinder head still requires leaded fuel so thinking of a stage 2 unleaded head, fast road cam and a pair of 40 DCOE’s.
My question is, will the Weber’s fit inside the bonnet without fouling the side of the bonnet? I intend running it with very short trumpets.

Many thanks

Ian.

Re: DCOE 40’s on 1982 CVH [Re: Ian jackson] #659764
01/09/20 08:27 PM
01/09/20 08:27 PM
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Posts: 909
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Arwyn Williams Offline
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Arwyn Williams  Offline
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Should do with it being a 4 seater

Have you all the parts to do a trial fit?

Arwyn

Re: DCOE 40’s on 1982 CVH [Re: Ian jackson] #659765
01/09/20 08:51 PM
01/09/20 08:51 PM
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Ian jackson Offline OP
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Ian jackson  Offline OP
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Thanks Arwen, I don’t unfortunately. I have found a couple of pictures on line with DCOE 40’s on which give the impression that they will fit the four seater but I don’t want to buy the parts only to find that they hit the bonnet!
Thinking if there’s someone on here who has done or seen the conversion done then that would be sufficient to proceed!

Re: DCOE 40’s on 1982 CVH [Re: Ian jackson] #659767
01/09/20 09:08 PM
01/09/20 09:08 PM
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Posts: 27
Bonn / Germany
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TimB Offline
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Bonn / Germany
Hi Ian - I am currently restoring a 1984 four seater with a CVH engine. I also considered the engine upgrade but due to budget constraints decided to rebuild the Weber 32/34 DFT that was installed. Nevertheless I spent a bit of time researching and you might find the information on the classicarb page helpful: https://classiccarbs.co.uk/product/twin-weber-40-dcoe-carburettor-kit-ford-1600-crossflow-engine.

WEBER kit fitting length (For engine bay clearance purposes):
Manifold 72mm
Carb(s) 118mm
Trumpets 38mm
Mounting spacers 5mm
Total fitting length approximately 233mm

Now this kit is for the crossflow engine. They also offer an inlet manifold for the CVH - which is 85mm. So you need to add the difference.
https://classiccarbs.co.uk/product/...t-manifold-kit-twin-weberdellorto-carbs.

After creating a 26cm deep mockup box ouf of cardbaord I came to the conclusion that it is too tight. In addition I personally would always use an air filter. And if you do this it will be necessary to modify the bonnet.

Re: DCOE 40’s on 1982 CVH [Re: Ian jackson] #659786
02/09/20 05:02 AM
02/09/20 05:02 AM
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Ian jackson Offline OP
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Ian jackson  Offline OP
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Hi Tim.

Good information thanks. Did you make a note of the actual distance from the mating face of the cylinder head to the side of the bonnet, at the front (the narrowest point)?
Burton do an inlet at 66mm and I can fit 16mm trumpets instead of 38 which would gain me 28mm therefore an overall all length of 205mm.

Cheers

Ian.

Re: DCOE 40’s on 1982 CVH [Re: Ian jackson] #659817
02/09/20 08:28 AM
02/09/20 08:28 AM
Joined: Mar 2010
Posts: 2,670
Petersfield, Hampshire
Ian Wegg Online content
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Ian Wegg  Online Content
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Posts: 2,670
Petersfield, Hampshire
FWIW there is a thread about the x-flow conversion here.


1980 Royal Ivory 4/4 4-seater.
Re: DCOE 40’s on 1982 CVH [Re: Ian jackson] #659821
02/09/20 08:38 AM
02/09/20 08:38 AM
Joined: Apr 2020
Posts: 27
Bonn / Germany
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TimB Offline
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TimB  Offline
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Joined: Apr 2020
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Bonn / Germany
The point I looked at was the narrowest point at the front to the inner wing.
At the time when I measured I already had the outer and inner wing removed. This made it easier to remove the old carb. At that I point I got the idea to create the cardbox template which was attached with the bolts of the carb to the engine. Then I just screwed the inner wing in place with two screws. My conclusion was that if I would add the ~60mm high K&N airfilter (I have this on my MGB with a Weber 45DCOE) - I would most likely not only modify the bonnet but very likely also the inner and outer wing.

Unfortunately I did not take a picture at this point. However my engine rebuild is almost complete. If all goes to plan I hopefully should mount the engine on the chassis by the end of the month.
I will put the cardbox and inner wing back one and share some pictures.

Tim

Re: DCOE 40’s on 1982 CVH [Re: Ian jackson] #665322
02/10/20 05:39 PM
02/10/20 05:39 PM
Joined: Apr 2020
Posts: 27
Bonn / Germany
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TimB Offline
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TimB  Offline
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Joined: Apr 2020
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Bonn / Germany
Hi Ian.

today I finally got my inner wings back from the paint shop. I only had limited time today and my cardboard mockup I made earlier wasn't around. Hopefully these two pictures will help you.
As you can see it is almost exactly 21 cm from the engine block to the inner wing. Please note that I only secured them with two bolts temporarily - so it might be plus/minus 2mm when the wings are on.

As mentioned, I will stick to the Weber 32/34 DFT .....gosh - now that I am writing this I am immediately tempted to look at the DCOE again... wink

Regards
Tim

[Linked Image]
[Linked Image]

Re: DCOE 40’s on 1982 CVH [Re: Ian jackson] #665501
03/10/20 08:44 PM
03/10/20 08:44 PM
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Posts: 2,374
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cerealsurfer Offline
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Don’t bother with the DCOE’s the piston and cylinder heads are a major limitation and won’t give the additional power you’d expect.

I built a blueprinted and then fully modified CVH for sprinting (including twin DCOE’S). The engine design just doesn’t give the power.

There was 6 or so double over head cam 16v Cylinder heads developed but from my research only one survived after ford ordered the prototypes distraction.

There is also a company that made custom pistons necessary to get decent power but when I contacted them they didn’t recommend going that route as an engine swap to a zetec E was cheaper and overall better.

I then swapped the engine to a Zetec E 2.0 - I’d strongly recommend ditching the CVH.





Re: DCOE 40’s on 1982 CVH [Re: Ian jackson] #665505
03/10/20 09:22 PM
03/10/20 09:22 PM
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Posts: 2,374
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cerealsurfer Offline
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Joined: Oct 2006
Posts: 2,374
Here is the details of my build - when I sold the engine.

http://www.talkmorgan.com/ubbthreads.php/topics/83423/135bhp_1630cc_Ford_CVH_Engine_

The piston modification was to pocket 1300cc dome top pistons to get more lift and duration.





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