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<DIV>no check valve....don't really want positive pressure to the needle...just
have fuel available when the carb draws for it.</DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=patterndude@comcast.net href="mailto:patterndude@comcast.net">Lance
Van Nostrand</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Sunday, November 05, 2006 9:56
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] o.s. 1.60
backplate fuel pump ?</DIV>
<DIV><BR></DIV>
<DIV>do you have a checkvalve on the tee? seems if you did that it would
guarantee constant fuel line pressure to the needle.</DIV>
<DIV>--Lance</DIV>
<DIV> </DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=flyintexan@houston.rr.com
href="mailto:flyintexan@houston.rr.com">mark hunt</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, November 04, 2006 8:23
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] o.s.
1.60 backplate fuel pump ?</DIV>
<DIV><BR></DIV>
<DIV>Lance,</DIV>
<DIV> </DIV>
<DIV>I agree that the OS160 carb was not designed for positive pressure fuel
supply...that may be why so many with the perry setup have to screw the low
end all the way in and end up with the high needle at only 1 to 1-1/2
turns out. Recently however, I have tried the perry setup using an
overflow back to the tank. This is simply a tee in the line between
the pump and the needle valve that feeds back to the tank. Any more
fuel than the carb asks for now goes back to the tank....sort of like a
regulator rather than a pump (iron bay?). My high needle is now at 2
turns out and the low needle is at the factory setting....plus the mid range
is not indicating any rich tendencies. We'll see how it holds up over
time...for now it's good.</DIV>
<DIV> </DIV>
<DIV>-mark</DIV>
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style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=patterndude@comcast.net
href="mailto:patterndude@comcast.net">Lance Van Nostrand</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, November 04, 2006
6:07 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] o.s.
1.60 backplate fuel pump ?</DIV>
<DIV><BR></DIV>
<DIV>Jon,</DIV>
<DIV>I first saw a built in pump overheat on a Webra 145 in Lubbock
(3000ft) on a 104 degree day. After that I convinced the Mintor
folks to install a nylon isolator/insulator. They eventually got it
done right (their first attempt leaked) and sent me test results of the
engine running in 160 degree ambient. My concern with the perrys is
that they seem to work for a while, then need adjustment. now I know
there are probably a lot that have found them rock solid, but my
observations are otherwise. I know several that have had much better
luck placing the tank on the firewall and eliminating the pump for the
160. in my observations, if I were to use a 160, this is what I'd
do. The 160 was not really designed for a pump and has a small
venturi with a lot of suction and doesn't need a pump. Engines
designed with a pump in mind might not be able to get away without
one.</DIV>
<DIV>--Lance</DIV>
<DIV> </DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=JonLowe@aol.com
href="mailto:JonLowe@aol.com">JonLowe@aol.com</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">nsrca-discussion@lists.nsrca.org</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, November 04, 2006
11:49 AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion]
o.s. 1.60 backplate fuel pump ?</DIV>
<DIV><BR></DIV>
<DIV>
<DIV>
<DIV>In a message dated 11/4/2006 1:01:33 AM Central Standard Time, <A
href="mailto:toneuf@sbcglobal.net">toneuf@sbcglobal.net</A>
writes:</DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid">
<DIV><FONT face=Arial>Guys,</FONT></DIV>
<DIV><FONT
face=Arial>
OK, I got into this discussion
late... </FONT></DIV>
<DIV><FONT face=Arial> I am trying
to locate a backplate</FONT></DIV>
<DIV><FONT face=Arial> fuel
pump unit for <U>my O.S. 1.60 FX engine.</U></FONT></DIV>
<DIV><FONT face=Arial> I read the
infomation by Tom Koenig from last year, but still need
the</FONT></DIV>
<DIV><FONT face=Arial> unit
contact information.</FONT></DIV>
<DIV><FONT face=Arial> Does this
unit acutally exist ?</FONT></DIV>
<DIV><FONT face=Arial> Maybe
someone out there has a unit to sell?</FONT></DIV>
<DIV><FONT face=Arial> If not, can
you give me the forward to this unit ?</FONT></DIV>
<DIV><FONT face=Arial>
Austrialia? Sheesh....</FONT></DIV>
<DIV><FONT
face=Arial>
Regards, Robert Hixson San
Francisco</FONT></DIV></BLOCKQUOTE></DIV>
<DIV>When I first heard about people doing this, I thought it was really
neat. Now, after thinking about it, I can't recommend doing
this. Many engines with backplate pumps have problems with the
pumps overheating, and vaporlocking or deteriorating. I've seen
this on Webras and Mintors, and watched the owners go to external Perry
pumps. Having the pump separate keeps its temp closer to
ambient. Plus, you can go to almost any hobby shop in the country,
and buy a Perry pump off the rack for $30, and not worry about having a
hard to find spare in an emergency. You can change it out without
removing the engine if you suspect a problem. Todays widebody
pattern ships have plenty of room in the nose, so mounting it is not an
issue. In addition, a separately mounted pump makes it much easier
to adjust pressure as you are setting it up, and it isn't subjected to
all of the vibration of the engine.</DIV>
<DIV> </DIV>
<DIV>Just my opinion.</DIV></DIV>
<DIV> </DIV>
<DIV><FONT size=2 PTSIZE="10">Jon Lowe<BR></FONT></DIV>
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