[Healeys] 100 carb balance pipe

[Curtis Arndt]

Hi All,

I believe (almost certain) that the 1/4" studs on the manifold are BSF on
BOTH ends.  IF they were coarse threaded into the aluminum they would be
BSW, to match the BSF Whitworth threads on the other end.

Cheers,

Curt

On Thu, Apr 23, 2015 at 4:09 AM, Bob Haskell <rchaskell at earthlink.net>
wrote:

> Alan,
>
> The threads are definitely BSF in these manifolds, but you're right -
> coarse thread is usually the case in aluminum.
>
> Thanks,
>
> Bob Haskell
> AHCA 3000 Mk I registrar
> http://www.ciahc.org/registry_3000mk1.php
>
> On 04/23/2015 06:21 AM, Alan Seigrist wrote:
>
>> Bob -
>>
>>  From memory I believe they have a section that isn't threaded in the
>> middle, with coarse thread to go in the manifold and fine thread for the
>> nut.
>>
>> Then again I probably have no clue what I'm talking about.
>>
>> Alan
>>
>> On Thu, Apr 23, 2015 at 6:01 PM, Bob Haskell <rchaskell at earthlink.net
>> <mailto:rchaskell at earthlink.net>> wrote:
>>
>>     Listers,
>>
>>     The balance pipe is attached to each intake manifold with two studs.
>>     Are the studs just threaded rod, or is there a non-threaded section in
>>     the middle?  Assume that they're steel and overall length an inch.
>>     Threads are 1/4-26 (BSF/BSC).
>>
>>     Cheers,
>>
>>     Bob Haskell
>>     AHCA 3000 Mk I registrar
>>     http://www.ciahc.org/registry_3000mk1.php
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