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<title>Mintor 1.70 Question</title>
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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'>Dean,<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><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> I can’t really fatten
the mid-range much more. I’m pretty much all the way rich on the screw
already, which is very odd for this engine I think. As for the pipe, I’m
at the distance Lance recommends for this pipe/engine combination, but I am
little longer in an attempt to avoid the touchy needle of a pipe on the edge.
Perhaps I should shorten it a bit?<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'> The engine was disassembled to
install the updated con rod last fall. I don’t actually recall if I
separated the cylinder from the crank, but I suspect that I did.<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>
<div>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Does anyone have access to the MA article Dean
refers to for the torque specs?</span></font><font color=navy><span
style='color:navy'><o:p></o:p></span></font></p>
<p><font size=3 color=navy face="Comic Sans MS"><span style='font-size:12.0pt;
font-family:"Comic Sans MS";color:navy'>Timothy Pascoe</span></font><font
color=navy><span style='color:navy'> <br>
<br>
</span></font><font size=2 color=purple face=Verdana><span style='font-size:
10.0pt;font-family:Verdana;color:purple'>Environment <st1:country-region w:st="on">Canada</st1:country-region>
/ Environnement <st1:place w:st="on"><st1:country-region w:st="on">Canada</st1:country-region></st1:place><br>
<st1:place w:st="on"><st1:country-region w:st="on">Canada</st1:country-region></st1:place>
Centre for Inland Waters / Centre Canadien des Eaux Intérieures<br>
<st1:Street w:st="on"><st1:address w:st="on">867 Lakeshore Road</st1:address></st1:Street>
/ 867, chemin Lakeshore<br>
<st1:City w:st="on">Burlington</st1:City>, <st1:State w:st="on">Ontario</st1:State>
/ <st1:City w:st="on">Burlington</st1:City> (<st1:place w:st="on"><st1:State
w:st="on">Ontario</st1:State></st1:place>)</span></font><font color=navy><span
style='color:navy'> <br>
</span></font><font size=2 color=purple face=Verdana><span style='font-size:
10.0pt;font-family:Verdana;color:purple'>L7R 4A6<br>
<br>
</span></font><font size=2 color=green face="Trebuchet MS"><span
style='font-size:10.0pt;font-family:"Trebuchet MS";color:green'>Tel/Tél: (905)
336-6239<br>
Fax/</span></font><font size=2 color=green face="Trebuchet MS"><span
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font-family:"Trebuchet MS";color:green'>: (905) 336-4699<br>
E-mail/C. élec: </span></font><font color=navy><span style='color:navy'><a
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style='font-size:10.0pt;font-family:"Trebuchet MS"'>tim.pascoe@ec.gc.ca</span></font></a><br>
</span></font><font size=2 color=navy face=Tahoma><span lang=EN-CA
style='font-size:10.0pt;font-family:Tahoma;color:navy'>Government of
Canada/Gouvernement du Canada</span></font><font color=navy><span
style='color:navy'> <br>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Dean Pappas<br>
<b><span style='font-weight:bold'>Sent:</span></b> August 3, 2006 10:41 AM<br>
<b><span style='font-weight:bold'>To:</span></b> NSRCA Mailing List<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [NSRCA-discussion]
Mintor 1.70 Question</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hello Tim,</span></font><o:p></o:p></p>
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<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Let me see if I can offer a couple of experiments.</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>1) Can you fatten the idle mixture? That will help.</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>2) Your pipe is long, and long pipes lean the midrange,
while short pipes fatten the midrange.</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>3) If you disassembled and re-assembled the engine, even a
tiny bit of overtightening of the four screws holding the cylinder to the case
will cause piston skirt and bottom end heating which will do ugly things
to the base compression after warmup. This will cause leaning in both
suction-fed and pumped engines. I forget the torque spec, but it was in the
Mintor 140 review article in MA several years ago.</span></font><o:p></o:p></p>
</div>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
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<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hope that helps,</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>
Dean</span></font><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'> </span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Dean Pappas <br>
Sr. Design Engineer <br>
Kodeos Communications <br>
111 Corporate Blvd. <br>
<st1:place w:st="on"><st1:City w:st="on">South Plainfield</st1:City>, <st1:State
w:st="on">N.J.</st1:State> <st1:PostalCode w:st="on">07080</st1:PostalCode></st1:place>
<br>
(908) 222-7817 phone <br>
(908) 222-2392 fax <br>
d.pappas@kodeos.com <o:p></o:p></span></font></p>
</div>
<blockquote style='margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt'>
<p class=MsoNormal style='margin-bottom:12.0pt'><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>
nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org]<b><span style='font-weight:
bold'>On Behalf Of </span></b>Pascoe,Tim [<st1:City w:st="on"><st1:place w:st="on">Burlington</st1:place></st1:City>]<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, August 03, 2006
10:02 AM<br>
<b><span style='font-weight:bold'>To:</span></b>
nsrca-discussion@lists.nsrca.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [NSRCA-discussion] Mintor
1.70 Question</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><!-- Converted from text/rtf format -->Hey
List,</span></font><o:p></o:p></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>
</span></font><font size=2 face=Arial><span style='font-size:10.0pt;font-family:
Arial'>I’ve been setting up a Mintor 1.70 in a new plane, and am running
into some minor difficulties. I first started running the engine last fall, and
has some mechanical trouble which lead to some major needle twisting. After
getting the mechanical trouble out of the way, I’ve found myself trying
to get the pump/needles back to where they should be, with varying levels of
success.</span></font><o:p></o:p></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>
</span></font><font size=2 face=Arial><span style='font-size:10.0pt;font-family:
Arial'>The</span></font> <font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>original symptoms seemed to indicate a lean mid-range on the
engine; dying on throttle up after a down line, the odd backfire when spooling
up from idle in the flat. I’ve been constantly richening the pump in an
attempt to solve these issues, and it seemed to work at first. Better
mid-range, no dead sticks. However, I am still getting the odd backfire, and
I’m really afraid that I’m going to start busting stuff.</span></font>
<font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>I am
now well in on the pump screw, much further than another Mintor 1.70</span></font>
<font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>flier</span></font>
<font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>running
the same fuel, and a long way past flush with the screw housing. The mid-range
needle is also on the rich side of the setting.</span></font><o:p></o:p></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>
</span></font><font size=2 face=Arial><span style='font-size:10.0pt;font-family:
Arial'>Any suggestions would be appreciated.</span></font> <font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'>The lines have all
been checked, and they are fine (pretty much new anyway). The tank clunk is
free, and the vent line is clear. Is it possible the backfire issue is in fact
a too rich mixture, and I’m chasing the problem the wrong way?</span></font><o:p></o:p></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>
</span></font><font size=2 face=Arial><span style='font-size:10.0pt;font-family:
Arial'>It’s getting frustrating, as the engine is great in</span></font> <font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>many</span></font>
<font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>other
ways</span></font> <font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>– very easy to start, phenomenal power, good</span></font>
<font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>throttle
response.</span></font> <font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I’m running a 17x13 prop (soon to switch to the new
18.1x10) on an Aeroslave carbon pipe set approx</span></font> <font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'>¼</span></font> <font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>to</span></font>
<font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>½ inch
longer than the Aeroslave recommended length,</span></font> <font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'>with Cool Power 15%
for fuel.</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Tim
Pascoe</span></font><o:p></o:p></p>
</blockquote>
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