Amal T15TT32

[Goran]

I am looking for an Amal T15TT32 to my Norton Inter Mod. 40 1932
If anyone have information or a picture of one it would help
Göran

[cardan]

Hi Goran,

My racing Rudge uses an AMAL 10TT32 - just like the one you are looking for, but slightly larger size (1 5/32" bore on the 500, 1 3/32" on the 350). The carb is based on the AMAC T10TT of the 1920s.

The Type 15 AMAL - such as the 15TT32 - has bore size up to 1".

In 1932 and 1934 (there was a 10TT32 and a 10TT34, but I don't think there was a 10TT33) the carb was brass/bronze, with a bell mouth that screws onto an external thread in the body. In the later 1930s, the bodies were aluminium alloy, and the bell mouth was fitted with a bell mouth secured by a lock ring that screws into an internal thread.

Not that the TT series of carburettors has a jet block that goes in from the top, so it doesn't have the usual large gland nut holding the jet block in from underneath.

As well as different bore sizes, they come with stub or two different flange mount options (2" centres, or 2.2" centres), and a choice of single or twin fuel bowls at various angles.

They are hard to find, and expensive, but they are around. Here's a later 1930s version https://www.ebay.co.uk/itm/401472968043 - not absolutely correct but quite similar.

Good luck,

Leon

[cardan]

On this listing: https://www.ebay.co.uk/itm/263426445393 the seller says "will also soon list 2 tt carbs one small bore one norton brass carb keep a look out." It might be worth contacting him.

By the way, the float bowls in 1932 were also brass/bronze, as were the float bowl tops. They were engraved AMAL, unlike the later die-cast alloy tops that had the writing in relief.

Leon

[Goran]

Thanks Leon for your replay and picture

Mor info

According to the factory book my Inter mod. 40 1932 was build by Joe Craig for 50% petrol, 25% benzole and 25% alcohol and was dispatched to Sweden in feb. 1932
Does this made my Norton special when it comes to the carburetter?
I am going to use the bike on normal petrol of today

Bruce Main Smith Norton 1928 to 1955 says Amal T15TT32 1 1/16
The sales brochure from 1932 says  mod 27 TT type
Are they talking of the same Carb?

Göran

[cardan]

Hi Goran,

The T15TT27 and 15TT32 are very similar carbies. Here's an extract from 1920s AMAC literature:

"T10TT25 This type was first used in the Isle of Man T.T. Races, 1925 and was afterwards put into general production for Sports machines, some being produced up till 1929 inclusive..."

So a sports bike from 1926 could be fitted with a T10TT25, but a 1926 TT bike would likely have a 10TT26.

The last update to the TT AMAC was the T10TT27 and this was used more-or-less unchanged up to about 1931. A 1932-model Norton, announced in say September 1931, might have specified a T10TT27 (while it was an AMAC carby, AMAC was part of AMAL by this time, so it would have had AMAL fuel bowls with AMAL on the lid), but later in the year they may have fitted the latest model AMAL 10TT32.

Your Model 40 sounds like a racy bike! The equivalent 350 Rudge was the "TT Replica" and it had a 10TT32 1 3/16" with twin fuel bowls. If your bike was built for racing, it probably started life with twin fuel bowls.

How about a photo?

Cheers

Leon

[Goran]

Here is two photos
It is a TT9 fitted but it is to new.

Göran

[Goran]

Sorry

[cardan]

That looks nice!

I can date the BTH magneto (to the month) if you let me know the details on the brass plate.

Cheers

Leon