These carb pistons are also heavy y brass and there is no spring. Not sure
which cars actually used them, but I have seen them on early MGs. The brass
cap without the piston is correct and the hole is to allow air to move in and
out as the piston moves.
David Nock
British Car Specialists
> On Dec 25, 2024, at 5:29â?¯AM, Bob Haskell <rchaskell@earthlink.net> wrote:
>
> No specification tags on the carbs? Burlen/SU Carb's website gives AUC 429T
> (H2) for the TB and TC, with damper.
>
> Mike Harvey's book, "Skinner Union" states that the hydraulic damper was
> introduced in 1938. The dashpot suction pistons prior to that had solid
> guide rod. They were made of zinc alloy Mazak from 19218 to 1939 and brass
> from 1925 to 1948.
>
> Bob Haskell
> Austin-Healey 3000 roadster registrar
>
> On 12/25/24 01:41, healeymanjim via Healeys wrote:
>> i am sorry i did not explain myself better. these carbs have no tube to put
>> a damper into. the piston rod is solid metal with a small hole drilled in
>> the top. there is no rod attached to the cap and the cap has not suffered
>> damage. think it is an older style piston that has been stuck in the
>> carbs. still confused.
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