Original 289/Weber Carb Question

[xb-60]

Gary,

What can be said....except that CS signed it so it must be true....surely?




Cheers
Glen

[Gaz64]

The photos are DCOEs, which at the time, the largest would have been 48mm, 50s and 55s came later.
DCO 3 carbs are completely different in many ways, the mounting flange is the first major difference, and hence the carbs don't interchange.

DCO 3 and DCO 4 are Ferrari 58mm carbs, and very rare.

If Carroll did run DCO 3 58mm carbs, the manifold would've had to have the different flange mounting.

Note on Page 9, where the statement of the carb rarity, and the consequent option of 48 IDA downdraft carbs.

https://historicdb.fia.com/sites/def...9_group_gt.pdf

[xb-60]

Interesting document.

In sheet 11 of CS’s letter (dated “Sept. 11, 1962”) it's stated that “We certify that in excess of 100 cars identical with the basic specification stated in this application were completed on Oct. 1, 1962”
Looking in the Cobra Registry, Cobra CSX2019 was the highest numbered car in the shipment that unloaded in LA on 1st October 1962

There was some critical comment back in the '60s about Enzo Ferrari over-estimating the production numbers of 250GTOs (and other sports/racing Ferraris). It would seem that CS had similar myopia...

Cheers!
Glen

[peterpjb]

Originally Posted by Gaz64

The photos are DCOEs, which at the time, the largest would have been 48mm, 50s and 55s came later.
DCO 3 carbs are completely different in many ways, the mounting flange is the first major difference, and hence the carbs don't interchange.

DCO 3 and DCO 4 are Ferrari 58mm carbs, and very rare.

If Carroll did run DCO 3 58mm carbs, the manifold would've had to have the different flange mounting.

Note on Page 9, where the statement of the carb rarity, and the consequent option of 48 IDA downdraft carbs.

https://historicdb.fia.com/sites/def...9_group_gt.pdf

page 9 is the addition for Sebring ‘63 where the SAI Cars raced the first time with Weber 48 IDM

[Dan Case]

I hope this link works. If it does this is a day one picture of the Cobra 8V induction kit offered at a suggested retail price of $1,230.70 in 1963. There was even a Ford Motor Company "COBRA KIT" sales number for it.

https://archive.petersen.org/filesto...7+16%3A02%3A43


This was the most complete installation kit ever offered and it was aimed at Cobra roadsters. As complete as the image is some small parts are not shown. By mid 1964 a very much less complete kit for $695.00 was offered (48 IDA/IDA1 carburetors) and installers had to figure out lots little details on their own. By 1965 the kits were down to $595.00.


With some variability in parts this is the type system with 48 IDM1/IDM5 carburetors was used until the 48 IDA/IDA1 carburetors reached the USA circa late March or early April 1964.

[1795]

Dan,

That kit looked pretty complete. the link worked just fine. Thanks.

Jim

[Dan Case]

Originally Posted by 1795

Dan,
That kit looked pretty complete. the link worked just fine. Thanks.
Jim

You are welcome. That picture is missing some of the rarest bits but pictures of installed systems cover them. It is enormously difficult to round up (or make based on borrowed samples) every original bit one piece at a time. I did it twice for Steven Juliano's cars with 48 IDA based mid 1964 systems and I am working on a summer 1963 ex-Shelby works system currently. Racers and their mechanics were sometimes pretty hard on the equipment. Parts wheeler dealers can add all kinds of damage. (It is not good to pressure wash any carburetor with water based solutions and then leave them water wet inside and out wrapped in plastic. It is not a good idea to leave bowls full of water before putting the units on shelves. It is terrible to soak them in carburetor cleaner and not bother to even dump the chemicals out of the bowls before you ship them off. <Yes, I received a foul smelling and oozing shipping box one day. The carrier wrapped the package in plastic at some point during the journey to help contain the mess.> It is a real bad idea to water wash one of these carburetors and then use compressed air to “blow” out the fuel bowl – ever seen a Weber float crushed by air pressure.) Even if you have an original small part it might not be usable, easy to restore, or restorable anymore.

If you browse that website and start at home search "Cobra". There are pictures in that folder covering decades of time BUT there are many day one pictures of Cobras and their parts. I know some of the chassis numbers as they are cars we have researched. Factory pictures were taken of many stock and optional parts and installations. Many photos were published in day one magazines and many were out takes.

[Gaz64]

Originally Posted by peterpjb

page 9 is the addition for Sebring ‘63 where the SAI Cars raced the first time with Weber 48 IDM

Ah yes, IDMs not IDAs, my oops.