Original 289/Weber Carb Question

[peterpjb]

Originally Posted by xb-60

I have another picture of the DCOE setup on 260 XHP-260-2 .....

Attachment 35692


Cheers,
Glen

this picture is part of the first FIA Cobra homologation 79 (8th Oct. 1962)

On page 8 of this homologation these carbs are described as

"Side Draft 58 MM Weber Carburetors"

[Gaz64]

I have yet to see a 58 DCOE carb, so since the photos show DCOE carbs, that list of options must be a misprint.
In the photos, the carb tops and the mounting flange are DCOE, (55,50,48,45,42,40,38mm), versus the upright parallel mounting of DCO 3 carbs that were available as 58mm.
Going by the airhorn (trumpet) size, I'd say 48mm, possibly even 45mm. This is only a 260.

[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

[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.