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@earthlink.net
>
> 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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