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<DIV><FONT face=Arial size=2>Keith,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Yup - you got it. Many compromises with
engine tuning. All other things equal, reducing the compression will
require a hotter plug.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Dave</FONT></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=tkeithb@comcast.net href="mailto:tkeithb@comcast.net">Keith Black</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> Sunday, May 22, 2005 1:19 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [SPAM] Re: [SPAM] Re: A
Bearing Tip - Boca Bearing Newsletter</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Dave, I'm not exactly clear on your last message.
Are you saying that *with* the head shim plugs go out more easily? This
doesn't seem like a good thing, which is why I'm not sure I understand you
correctly.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>BTW, what did you use for a head shim? I have the
1.45 and it does not have a head shim.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks,</FONT></DIV>
<DIV><FONT face=Arial size=2>Keith</FONT></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=DaveL322@comcast.net
href="mailto:DaveL322@comcast.net">DaveL322@comcast.net</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> Friday, May 20, 2005 8:55
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [SPAM] Re: [SPAM] Re: A
Bearing Tip - Boca Bearing Newsletter</DIV>
<DIV><BR></DIV>
<DIV>Yes.</DIV>
<DIV> </DIV>
<DIV>Headshims to reduce compression. Obviously, this reduces the
power. Not as obviously it tends to reduce the amount of unload and it
made the engine more sensitive to having a fresh hot plug (engine ran cooler
and the plug would go out more easily if set too rich).</DIV>
<DIV><BR>Dave</DIV>
<DIV> </DIV>
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Original message -------------- <BR>
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<DIV><FONT face=Arial size=2>Dave, did you do something to reduce the
compression/timing such as adding a shim to the Webra 160?</FONT></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=DaveL322@comcast.net href="mailto:DaveL322@comcast.net">David
Lockhart</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> Thursday, May 19, 2005 11:04
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [SPAM] Re: A Bearing
Tip - Boca Bearing Newsletter</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>With specific reference to the OS140, I
gotta agree - use the sealed SS BB with both seals. I've seen 500+
flights.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I'm also concluding that much of the damage
to rear bearings is from running the engines overcompressed resulting in
pre-ignition (detonation, pinging, etc). I just changed the stock
bearing in a Webra160 after about 400 flights - all with the compression
substantially reduced. Several years ago, a Bully (Webra) 145 I
ran needed new bearings every 100-150 flights, and was relatively much
more compressed.</FONT></DIV><FONT face=Arial size=2>
<DIV><BR>Dave</DIV>
<DIV></FONT> </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=verne@twmi.rr.com href="mailto:verne@twmi.rr.com">Verne
Koester</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> Thursday, May 19, 2005
11:18 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [SPAM] Re: A Bearing
Tip - Boca Bearing Newsletter</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial>Rodney, </FONT></DIV>
<DIV><FONT face=Arial>If you're putting it in an O.S. 1.4, definitely
leave the seals in. You'll get 300-500 flights with the seals in. With
them out, you'll be lucky to put 5 gallons through the engine
before they're shot!</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Verne Koester</FONT></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=rodney19821982@yahoo.com
href="mailto:rodney19821982@yahoo.com">Rodney Tanner</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> Thursday, May 19, 2005
10:33 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [SPAM] Re: A Bearing
Tip - Boca Bearing Newsletter</DIV>
<DIV><BR></DIV>
<DIV>Bob, So using an OS 140 EFI bearing, is it advisable to remove
the seals?</DIV>
<DIV>Rodney<BR><BR><B><I>Bob Pastorello <<A
href="mailto:rcaerobob@cox.net">rcaerobob@cox.net</A>></I></B>
wrote:</DIV>
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<DIV><FONT face=Arial size=2>Since I use theirs, I get this
e-newsletter. This month's tip;</FONT></DIV>
<DIV><FONT face=Arial size=2><<If your Front engine bearing
has two rubber seals you should not remove them. These bearings
have their own grease and can help stop oil leaks. If your bearing
has two shields, we recommend you remove one of them. For
instructions on removing your shields take a look at this <A
class=fpbodylink
href="http://www.bocabearings.com/main1.aspx?p=help#six">Help
Section</A>.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Your Rear engine bearing should be
open on both sides to allow as much fuel as possible to pass
through and act as a lubricant. You may however want leave one
shield on in the rear which would help to protect the rest of the
engine from any foreign matter getting through. This should not be
done with one seal. If you find your engine is stingy in getting
fuel to the rear, you should definitely leave the bearing
open.</DIV>
<P class=body2><SPAN class=body2>In our next issue of the Boca
Bearings Tips & Advice </SPAN>Newsletter we will show you how
to remove your bearing shields. >></P>
<P class=body2>Note - if you open your crankcase, using sealed
bearings, and the crankshaft counterweight it dry-looking, or the
lower part of the bearing isn't pooling oil, you may think about
removing the seals. I do, for this reason.</P></FONT>
<DIV><FONT face=Arial size=2><BR>Bob Pastorello<BR><A
href="http://www.rcaerobats.net/">www.rcaerobats.net</A><BR><A
href="mailto:rcaerobob@cox.net">rcaerobob@cox.net</A></FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>