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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I was running my DZ in the drive way
trying to tune it.<span style='mso-spacerun:yes'> </span>(<span
class=GramE>which</span> I accomplished)<span style='mso-spacerun:yes'>
</span>After 3 or 4 minutes I took my temp gun to the exhaust and engine. <span
style='mso-spacerun:yes'> </span>The Teflon coupler was 375 degrees.<span
style='mso-spacerun:yes'> </span>I was shocked at that temp.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma'>-----Original Message-----<br>
<b><span style='font-weight:bold'>From:</span></b> discussion-request@nsrca.org
[mailto:discussion-request@nsrca.org] <b><span style='font-weight:bold'>On
Behalf Of </span></b>EHaury@aol.com<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, October 09, 2003
8:02 AM<br>
<b><span style='font-weight:bold'>To:</span></b> discussion@nsrca.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: Teflon headers,
followup</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>I've used the 5033K39 in
"tunneled" (Typhoon) and "untunneled" (Hydeout) for several
years. Headers are either AAP or CD (cut 0.4" from the circumference of a
piece of 5/8 tubing for a 1/2" "bushing for the CD). Pipes are Hatori
mounted at the inlet and outlet (stinger) on a 5/8 x 5/8 Lord mount. A piece of
3/4" ID silicone insulator (smaller at stinger) protects wire ties
that fasten everything to "clips" on the Lords. I make the tubing a
bit longer than most, around 8", <o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'> <o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>The tunneled version lasts 200+
flights, the untunneled have not failed in over 500+ flights. Lord mounts will
generally give up before the tubing.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'> <o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>This tubing is on the ragged edge or
its heat tolerance. If you find it necessary to run the engine for more than a
couple of seconds at full throttle on the ground expect to replace the tubing
often. This sort of operation can produce exhaust temps >150 deg above the
rating of the tubing and will take it out fast. "Normal" part
throttle flight operation is on the order of 50 deg less than the tubing is
rated, plus there is good air flow to help.<o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'> <o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Earl<o:p></o:p></span></font></p>
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