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<DIV><FONT face=Arial size=2>yes, the pipe dimensions are fine. You are on
the right path. I'll keep watching for your progress.</FONT></DIV>
<DIV><FONT face=Arial size=2>-Lance</FONT></DIV>
<DIV> </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=cchariandy@yahoo.ca href="mailto:cchariandy@yahoo.ca">colin
chariandy</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, August 30, 2005 7:05
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Fw: Aeroslave pipe set-up
<clipped></DIV>
<DIV><BR></DIV>
<DIV>Lance</DIV>
<DIV> </DIV>
<DIV>I'm in Toronto, Canada...maybe 100' above sea level. This should not be a
factor.</DIV>
<DIV> </DIV>
<DIV>The angled baffle is at 12.75" and the main at 15.25" from the pipe
inlet. If this is OK, I will try coming out with the pump in 1/4 turn
increments and keep you updated. I'm also going to switch to the "fine" needle
valve.</DIV>
<DIV> </DIV>
<DIV>Colin.<BR><BR><B><I>Lance Van Nostrand
<patterndude@comcast.net></I></B> wrote:</DIV>
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<DIV><FONT face=Arial size=2>Colin,</FONT></DIV>
<DIV><FONT face=Arial size=2>Well we're making progress, but your data does
not match most OS140RXs. A duel plug head will help a bit, but that's
a step to refine a good setup, not make a good one from a touchy
setup. The touchiness you describe and the rich midrange on such a
long pipe gives this problem away.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>What elevation do you fly at? You may be
at a veyr high altitude, which is influencing the tuning and will require
less pump pressure. The other scenario is that your engine just came
from the factory with a bit too much pump pressure. Either case, the
solution is the same. You have too much pump pressure.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Depending on how meticulous you want to be
there's the 80/20 rule or the 99% rule. for 80/20, unscrew the pump
screw 3/4 turn and richen the idle a little bit. This will be close
and you should find the pipe setting much less touchy. use the techniques
earlier to find the right length. Since length is directly related to
port timing, the ideal length should not change theoretically, but I think
you are longer than ideal because your bigger problem is too much pump and
you are way off the ideal pipe length just to lean the midrange. If
you want to confirm that the baffles were put in correctly, insert a small
dowel down the neck past the first angle to the main baffle. Let me
know the distance. Also, the distance the front of the angle
baffle. The other setup option is to set it to 31" and reduce the pump
pressure until you get a good midrange, then test fly and listen to see if
it sags on uplines. If so, increase pump until it runs
consistent. thi smight require a small access hole in your firewall to
simplify adjustments.</FONT></DIV>
<DIV><FONT face=Arial size=2>--Lance</FONT></DIV>
<DIV> </DIV>
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