Who will do my triple webers? Advice please.

mattbibbey

mattbibbey

Well-Known Forum User
Hi chaps, I currently have a fairly tatty '72 240Z with a few mechanical gremlins. I am about to replace the fuel lines and fuel tank, i have the tank (am still waiting on the lines) and I need to do something about my carbs.

I am currently running the original hitachi's but they are in dire need of a rebuild, so, I thought that instead of refurbing my originals and then retuning and rebalancing them I would put my triple weber 40's on. I have 3 weber 40's from weber italy and a cannon manifold but no linkage or anything else.

Who do I get to fit them? Where are these people hiding? I am nearly skint at the moment so I'm V-keen to find someone cheap, but not shit or a cowboy. Also I'd appretiate it if anybody could tell me roughly how much this might cost me.

I am in oxfordshire so the Z Farm is out of range for me.

As always, any help or advice is gratefully recieved!!!!!

Thanks for taking the time

Matt

P.S. anyone interested in some highly polished bell housings? Will e-mail pics if you are.
 
To be honest, Matt, you are better off sticking to the original Hitach-SU's if you are on a Budget.

Anyone who can rebuild the Triple Carbs properly is going to charge you almost the cost of a set of new Carbs, believe it or not. When triple carbs aren't used for any length of time they get a coating of the 'oxidation' process that all Alloy components will develop, but inside the galleries and fine passageways that do the stuff internally. Reconditioning is therefore time-consuming and requires specialist ultrasound cleaning equipment to do it thoroughly, plus a rebuild kit ( x 3 ) which alone comes to nearly £150. Plus, anyone who is competent to reassemble Triple Carbs properly will expect to be paid for the 10-12 hours it will take.
Then, they will need a Rolling Road session to set them up properly, which if you are lucky will cost a bit less than another £150 to do, but maybe more, much more...

In contrast, you can easily strip, clean & rebuild your own Hitach-SU's with two of the Rebuild Kits from Mike, along with new needles, for less than £90 or so. And hey are simple, quick and therefore cheap to set-up - just read the Haynes Manual or whatever, and do it yourself.
 
All the parts for weber carbs are available from Eurocarb.
However, if your engine is stock I would advise you to stick to the standard hitachi's.
The other problem is, that unless your webers are new with the correct chokes, jets etc, it would be cheaper to refurb your hitachi's which on a standard engine would be marginally less efficient (power wise) than the webers, if at all. Hitachi's will also give you better fuel consumption.
Cant give you an accuate figure for all your linkages etc because I don't know what you are missing but if you need the chokes etc you won't get much change out of £80.00 per carb.
All the prices are on the Eurocarb site.

Duncan: You beat me to it !
 
My carbs came freshly refurbished from a popular italian company so they are as good as new. My cannon manifold has hardly seen any use either. I bought them all at the end of last year. The only thing I'm missing is the linkage and the gaskets.

When I said I was on a budget, really I meant I didn't want to get ripped off. I was thinking I could get them fitted and have the car dyno'd for around £250-£320.

Any response?

Cheers

Matt
 
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What is different about your engine to warrant triple carbs (camshaft, head-work, comp. ratio etc) ?

And you can also be ripped off cheaply - nothing to do with how much you pay !!!!! Then your engine runs lean and melts your pistons..................

Have it done properly, pay the price and be safe !
 
fair one. Obviously i want it done properly which is why I was after a recommendation from someone on the site. Only a mug would take their pride and joy to a potential cowboy haha.

Also, my carbs are DCOM not DCOE. I understand they are a little better in terms of efficiency and power but not by much. Is there anyone else out there running DCOM's?

I had a look on a yank website and they do the linkage for triple webers on the same Cannon Manifold but it says for DCOE and I'm not sure if they'd be the same for the linkage.
 
What is different about your engine to warrant triple carbs (camshaft, head-work, comp. ratio etc) ?
 
Well, i think there's a fast road cam in it and I have a six into two into one exhaust manifold.
 
yeah in stainless. Slightly different to yours though. It's Janspeed.

I've found out a little bit about these Weber DCOM carbs. Although there's not much about them out there, one guy had replied to someones post on a forum saying that there was "no such thing as DCOM". I must be imagining what is downstairs in my utility room lol.

The DCOE production line ceased in the 80's i was told, then weber had a more advanced/sophisticated carb with among a couple of other tweeks, a "perfected" fuel acceleration pump which is a diaphagm type. Weber couldn't see fuel injection taking over................
 
I went through a similar exercise to the one your proposing - so might be an interesting example for you.

I bought the engine from ebay - according to the receipts, its stage1 head with fast road cam, so perhaps comparable to your setup.

in the end I think I spent something like £600 to go from what you have (serviced carbs, not set up, no linkage) to finished installation - and I gained about 8 bhp over the twin Hitachi setup.

rod linkage part: approx £40
welder time to make linkage parts into linkage approx £40
Jets etc £60
rolling road time 4 hrs: approx £400
(you might well do much better than this rolling road time, since I stubbornly insisted on keeping 38mm chokes and that definitely added to the time, but lets not open that can of worms)


I got the linkage bits from eBay My World - illstonandrobson1908
local mobile welder assembled it for me and
Northampton Motorsport - Home did the RR & jetting for me.
 
Here's what I've spent:

Cannon manifold, hard linkage and mounting hardware- £200
3 X Weber DCOM carbs, Proffessionally reconditioned- £500
6X size 135 main jets, 6x size 200 air corrector jets and 6x size 50F9 idle jets- £42

This has already been paid for so the expense is going to be the Dyno. I can fit them myself and get them roughly balanced, enough to get them to the dyno, and they can do the rest. I'm making the fuel linkage myself. Mike at MJP is going to sell me a new fuel pump and stuff like that which will cost me around £150 i think he said. Very reasonable.

I need to find a rolling road near me that someone can reccomend. I reckon a good operator should have them done in less than 2hrs. If anyone is interested, I have a spare cannon six branch inlet manifold. I'd be after £125 though. What I paid for it.
 
It's been used and has never been polished. It's not absolutely filthy but is a bit dirty. I'll e-mail you a couple of pics.
 
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