Weber 58 carbs on eBay: 750 Monza?

The sidedrafts were used on Climax 2 and 2.5 liter GP motors. I'm not sure about 750 and 850 Monzas. Price seems somewhat high...

 

These are 58 DCO3, and Godfrey Eaton lists 750 Monza with 58 DCOA3, or 52 DCOA, and 860 Monza with 58 DCOA. He's not always accurate and these could well be correct.

Regarding the price (£15,500 or offer) I can imagine an owner whose car is running wrong or replica carbs thinking this could be OK, especially when you consider how much the car's worth. Crazy world.....

 

Reality

 

I know of a few lying around Kew Melbourne of a old Climax.

 

I don't know what car they came off, but it wasn't a 750 or 860 Monza; the velocity stacks are way too long. The stacks on a 750/860 are so short that you can actually see the auxiliary venturi poking out the end of the stack. Also, they don't say how big the venturis are on these carbs.

My memory is that a pair of 40DCOA3s that came off a 500 Mondial sold at acution a few years ago for something like $42k

 

Is somebody reproducing them? I never heard of a repro 58.

 

Yep, Crostwaite and Gardiner.

 

Hello,

I am the seller of these carbs. My mechanic did in-fact used to work for C&G and made the reproductions. He gave these carbs a full service and confirmed that these are original sand-cast Webers with very little use and very good conditions throughout. The repops struggled on idling through progression and I am told there is a big difference on the overall performance of repops compared to the real thing. If anyone wants further information on these carbs please contact me personally at [email protected]

Best regards

Theo

 

Welcome aboard!

 

IMO not far of their true value.

 

Thanks! This site is a treasure chest of information.

Hi, I wasn't expecting to get the full asking price unless someone really wanted them and would pay silly money. I would bite someone's arm off at 14k and seriously consider 12k; Thanks for your input.

Oh, there is a third one available in the same condition if there is anyone out there with some crazy project!

Best

Theo

 

A third one available, to much information for a Saturday night!!
http://www.youtube.com/watch?v=0O2X46GIUFc

 

Price slashed for sale!

 

I just ran across this thread. I have an original 40DCOA3 carb in almost factory new condition. Correct for early 500 Mondial. I am not sure what it is worth but definitely rare. This Weber was very low production and this one is serial #50. Anyone have a 500 Mondial with an incorrect DCOE Weber that wants to make things correct PM me.
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With a serial at #50 it must be from the next series of two liter motors after the Series II Mondials, like the tipo 131 motor. If the carbs on our Mondial are serials 2 & 3 and there were 11 tipo 111 motors, then the series would have ended for the 500 Mondials at 23. So along about 13th to 14th of the MDTRs would have had this carb - around 0694 or 0696 . . .

 

In the far fetched chance this carb was on 0694 - maybe it was taken off the wreckage as a souvenir?

http://www.ferrarichat.com/forum/showthread.php?t=101321&highlight=Borges+Barreto

 

gone from ebay........
ed

 

It was mis-sorted into the motorcycle parts and a friend of mine found it and told me about it. I don't routinely buy/sell parts but this was a great find. It would be nice to get it back onto a car it belongs on - or it also looks neat sitting on a shelf in my garage!

 

That 40DCO3 most likely came off of an Alfa. It has the small hole drilling for the progressive circuit that results in a sever off idle bog on large displacement engines. I have modified a few of these to work on Jaguar C-types. The 40 DCO3's that were used on large displacement engines had a larger hole drilled for the progressive circuit (see the brass plug on the mounting face below the idle screw).

Cheers Jim

 

Jim, this is a completely different carb than a dco3. I actually compared this to a dco3 today - nothing similar. Not sure how Weber came up with the model numbers but this has nothing in common.

 

Jim,

this weber is definately not off of an Alfa - I have a 58 spider veloce with weber 40 DCO 3's and they are definately different from this posted carb. see attached photos my my spare set of 40 DCO 3s.

Reed
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You are right I should have taken a closer look the first photos; they have a lot more external similarities to a 45 DCO3, than a 40 DCO3. I am not familiar with the 40 DCOA3. It is interesting you said the 40 DCO3 pictured above is from an Alfa. If you look at the progressive hole drilling on it (brass plug on the mounting face) it is the large diameter circuit. The carb with the large diameter holes have a different progressive circuit that are much easier to tune to a large displacement engine. The first carb (40 DCOA3) I would expect to work well on engines with approximately 400cc per cylinder and the second one (40DCO3) I would expect to work well with around 600cc per cylinder. This is based on my experience with the DCO3's I have worked on, to tell for sure on these carbs it would be necessary to look at the configuration of the holes drilled at the butterfly interface.

Cheers Jim

 

Some 40DCOA3 pics; serial nos. 2 and 3 (pics by Ed Warburton):
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