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Re: [T3] fuel pressure regulator
<x-html><!x-stuff-for-pete base="" src="" id="0" charset="iso-8859-1/macintosh">just above the loop. you see what looks like a pin sticking out of the needle valve. <div><br></div><div>here is a link to a nice pic of the Weber IDF </div><div><br></div><div><a href="http://www.carburetorclinic.com/36IDFrebuild/36idfmed69.jpg";>http://www.carburetorclinic.com/36IDFrebuild/36idfmed69.jpg</a><br>
<br></div><div>similar setup and indeed uses a spring to buffer the needle valve. great quality pic.</div><div><br><div class="gmail_quote">On Sat, Nov 1, 2008 at 7:43 PM, Jim Adney <span dir="ltr"><<a href="mailto:jadney@vwtype3.org";>jadney@vwtype3.org</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div class="Ih2E3d">On 1 Nov 2008 at 18:31, Jason wrote:<br>
<br>
> yes we are talking about the same thing. when the fuel turns to varnish<br>
> after sitting it makes the needle stick in position. many times overflowing<br>
> the carb. sometimes we can clean them but sometimes the rubber tip has also<br>
> deteriorated and does not quite seal right. we use gravity feed but I could<br>
> see only a few lbs of force causing a leak.<br>
<br>
</div>Keep in mind that the PRESSURE is a few psi, but the FORCE on the<br>
needle depends on what fraction of 1 sq. in. that the needle blocks.<br>
That force is on the order of .015 lbs for a 2 mm float valve and 3<br>
psi from the pump.<br>
<div class="Ih2E3d"><br>
I did browse online and found a pic of the ICT exploded here<br>
<br>
> <a href="http://www.scribd.com/doc/2360794/Weber-34-ICT"; target="_blank">http://www.scribd.com/doc/2360794/Weber-34-ICT</a><br>
> <<a href="http://www.scribd.com/doc/2360794/Weber-34-ICT"; target="_blank">http://www.scribd.com/doc/2360794/Weber-34-ICT</a>>It<br>
> shows that there does appear to be a spring loaded needle like I am accustom<br>
> to. You can see the little tab on the side that hooks the float.<br>
<br>
</div>Interesting link: A Russian language exploded view of a Weber carb.<br>
<br>
It's impossible to tell for sure, but that little loop just looks<br>
like what's often used to make sure the float pulls down when the<br>
float drops. That would just keep the valve from sticking closed.<br>
<font color="#888888"><br>
--<br>
</font><div><div></div><div class="Wj3C7c">*******************************<br>
Jim Adney, <a href="mailto:jadney@vwtype3.org";>jadney@vwtype3.org</a><br>
Madison, Wisconsin, USA<br>
*******************************<br>
<br>
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</div></div></blockquote></div><br></div>
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