<DIV>Hi Ron,</DIV>
<DIV> </DIV>
<DIV>Eric H, or Dean P would probably be the best people to answer that.</DIV>
<DIV> </DIV>
<DIV>I forget how many variables back I changed to the 3M heads. My basic take would be that they give a smoother mid range on an ESD pipe, are less sensitive to pipe setting, lower the compression - so run cooler, without affecting the top end performance. </DIV>
<DIV> </DIV>
<DIV>Rodney</DIV>
<DIV> </DIV>
<DIV><BR><B><I>Ron Van Putte <vanputte@cox.net></I></B> wrote:</DIV>
<BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid"><BR>On Apr 20, 2005, at 8:11 AM, Cameron Smith wrote:<BR><BR>> Are you supposed to change em? Seriously I change both plugs about <BR>> every 3 to 5 cases of fuel. Sometimes I just rotate the center plug to <BR>> the back position then replace the center plug. I replace ANYtime the <BR>> engine deadsticks or acts to much out of character. Most times they <BR>> are still good.<BR>> A buddy checked my idle the other day on my NEW Single plug (STOCK) <BR>> head & it also Idles at 1K. Gotta luv it!<BR><BR>I've got to ask this: Is there any real difference in the way an OS <BR>1.40RX runs with the Mintor 1.40 head 'extra' plug in the 'front' or <BR>'rear' position? I know that Lance says to run it with the 'extra' <BR>plug in the 'rear' position, but I theorized that there would be better <BR>fuel ignition if the 'extra' plug was in the 'front' position, as
far <BR>away from the exhaust as possible. I've been running mine that way and <BR>the engine runs fine.<BR><BR>Ron Van Putte<BR>> <BR>> <BR>> <BR>> -----Original Message-----<BR>> From: discussion-request@nsrca.org <BR>> [mailto:discussion-request@nsrca.org] On Behalf Of <BR>> Jim_Woodward@beaerospace.com<BR>> Sent: Wednesday, April 20, 2005 8:57 AM<BR>> To: discussion@nsrca.org<BR>> Cc: discussion@nsrca.org; discussion-request@nsrca.org<BR>> Subject: Re: [SPAM] Re: RE: OS mixture question<BR>> <BR>><BR>><BR>> Hi Rodney,<BR>><BR>> Why are you changing plugs every 30 flights? That get pretty <BR>> expensive in the long run. Is the engine running
lean? I've seen a <BR>> few other using the 3M head and OSF plugs, and not having to change so <BR>> often.<BR>><BR>> Cameron, how often are you changing plugs?<BR>><BR>> Thanks,<BR>> Jim W.<BR></BLOCKQUOTE><p>__________________________________________________<br>Do You Yahoo!?<br>Tired of spam? Yahoo! Mail has the best spam protection around <br>http://mail.yahoo.com