<div dir="ltr"><div>Hi All,</div><div><br></div><div>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.</div><div><br></div><div>Cheers,</div><div><br></div><div>Curt</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Apr 23, 2015 at 4:09 AM, Bob Haskell <span dir="ltr"><<a href="mailto:rchaskell@earthlink.net" target="_blank">rchaskell@earthlink.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Alan,<br>
<br>
The threads are definitely BSF in these manifolds, but you're right - coarse thread is usually the case in aluminum.<br>
<br>
Thanks,<span><br>
<br>
Bob Haskell<br>
AHCA 3000 Mk I registrar<br>
<a href="http://www.ciahc.org/registry_3000mk1.php" target="_blank">http://www.ciahc.org/registry_3000mk1.php</a><br>
<br></span><span>
On 04/23/2015 06:21 AM, Alan Seigrist wrote:<br>
</span><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"><span>
Bob -<br>
<br>
From memory I believe they have a section that isn't threaded in the<br>
middle, with coarse thread to go in the manifold and fine thread for the<br>
nut.<br>
<br>
Then again I probably have no clue what I'm talking about.<br>
<br>
Alan<br>
<br>
On Thu, Apr 23, 2015 at 6:01 PM, Bob Haskell <<a href="mailto:rchaskell@earthlink.net" target="_blank">rchaskell@earthlink.net</a><br></span><span>
<mailto:<a href="mailto:rchaskell@earthlink.net" target="_blank">rchaskell@earthlink.net</a>>> wrote:<br>
<br>
Listers,<br>
<br>
The balance pipe is attached to each intake manifold with two studs.<br>
Are the studs just threaded rod, or is there a non-threaded section in<br>
the middle? Assume that they're steel and overall length an inch.<br>
Threads are 1/4-26 (BSF/BSC).<br>
<br>
Cheers,<br>
<br>
Bob Haskell<br>
AHCA 3000 Mk I registrar<br>
<a href="http://www.ciahc.org/registry_3000mk1.php" target="_blank">http://www.ciahc.org/registry_3000mk1.php</a><br>
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