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<P>John -</P>
<P>dunno about fuel being the issue w/ your engine. Without re-starting the 'fuel-brand' war (almost as much fun as the 'radio brand' war) I've burned more than 100 gallons of S&W in the past 6 years, virtually all through 3 OS 14RX's, ALL with 17% synthetic oil / 2% castor, and there's been no gumming problem inside the engines at all. </P>
<P>Others' experience may vary with fuel brands, but I doubt that castor gumming is your issue here. </P>
<P>Needle settings: both my 140 RX pipe setups are essentially identical; One of my (acquired used) 140 RX's sets at about 1-1/2 - 1-3/4 turns open, another (also acquired used) sets at 3/4 to 1 turn open (both with 160FX-style remote needles mounted on the firewall FWIW) I havent' noticed a difference between the two in throttling once the needle is set. </P>
<P>At least one of the engines has had the pump played with by a previous owner, and the first time I ran that engine he gave me over-the-phone instructions on how to adjust the pump to make the needle valve work. I haven't touched the pump setting since that day. </P>
<P>I do favor setting the pipe length long on your setup ... I KNOW you're not short of power on your setup, and a long exhaust system will handle very nicely, be tolerant of needle settings, be less peaky, etc. You won't miss the few RPM you lose by pulling the pipe out a bit. <BR></P></DIV>
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<DIV></DIV>From: <I>"John Pavlick" <jpavlick@idseng.com></I><BR>Reply-To: <I>NSRCA Mailing List <nsrca-discussion@lists.nsrca.org></I><BR>To: <I>"NSRCA Mailing List" <nsrca-discussion@lists.nsrca.org></I><BR>Subject: <I>Re: [NSRCA-discussion] OS 140Rx pump question</I><BR>Date: <I>Mon, 25 Sep 2006 23:25:36 -0400</I><BR>>OK, I usually run Magnum but I haven't picked up my winter supply yet. Guess<BR>>I should take a ride...<BR>><BR>>John Pavlick<BR>>http://www.idseng.com<BR>><BR>><BR>> > -----Original Message-----<BR>> > From: nsrca-discussion-bounces@lists.nsrca.org<BR>> > [mailto:nsrca-discussion-bounces@lists.nsrca.org]On Behalf Of<BR>> > Lance Van Nostrand<BR>> > Sent: Monday, September 25, 2006 10:33 PM<BR>> > To: NSRCA Mailing List<BR>> > Subject:
Re: [NSRCA-discussion] OS 140Rx pump question<BR>> ><BR>> ><BR>> > Add this advice to mine. I support this. Magnum 15% also is fine. I've<BR>> > tested a lot of fuels and would not put Omega through a pumped<BR>> > engine ever.<BR>> > CoolPower has the highest detergent factor of all the fuels I've<BR>> > tested so<BR>> > it is an excellent suggestion to start wtih.<BR>> > --lance<BR>> ><BR>> > ----- Original Message -----<BR>> > From: "Wayne Galligan" <wgalligan@texasairnet.com><BR>> > To: "NSRCA Mailing List" <nsrca-discussion@lists.nsrca.org><BR>> > Sent: Sunday, September 24, 2006 7:51 PM<BR>> > Subject: Re: [NSRCA-discussion] OS 140Rx pump question<BR>> ><BR>> ><BR>> > > First thing I would do is switch over to regular Cool Power.<BR>>
> Omega has<BR>> > > castor oil and it can gum up or varnish in the engine. You will have a<BR>> > > bear<BR>> > > of a time getting the rod to slide on the piston wrist pin<BR>> > because of the<BR>> > > castor gumming up on the pin. The regular Cool Power uses synthetic and<BR>> > > does not gum up on any of the parts.<BR>> > ><BR>> > > The pipe length sounds about right. But one inch short and it will run<BR>> > > fat<BR>> > > in the midrange. Try a little longer and switcging to Cool Power 15% or<BR>> > > 20/20 blend<BR>> > ><BR>> > > Wayne<BR>> > ><BR>> > ><BR>> > > ----- Original Message -----<BR>> > > From: "John Pavlick" <jpavlick@idseng.com><BR>> > > To: "NSRCA Mailing
List" <nsrca-discussion@lists.nsrca.org><BR>> > > Sent: Sunday, September 24, 2006 7:49 PM<BR>> > > Subject: Re: [NSRCA-discussion] OS 140Rx pump question<BR>> > ><BR>> > ><BR>> > >> Sorry - Aeroslave pipe, APC 15.75x10 3-blade (re-pitched by Dave L.).<BR>> > >> Fuel<BR>> > >> is morgan Omega 15%. The pipe is currently set at 31 3/4" straight-line<BR>> > > from<BR>> > >> plug center to the end of the pipe with an OS O-ring header. I<BR>> > know this<BR>> > >> measurement only makes sense if using the same header or at least one<BR>> > >> with<BR>> > >> the same total length.<BR>> > >><BR>> > >> John Pavlick<BR>> > >> http://www.idseng.com<BR>> > >><BR>> > >><BR>> > >> >
-----Original Message-----<BR>> > >> > From: nsrca-discussion-bounces@lists.nsrca.org<BR>> > >> > [mailto:nsrca-discussion-bounces@lists.nsrca.org]On Behalf Of<BR>> > >> > Wayne Galligan<BR>> > >> > Sent: Sunday, September 24, 2006 8:31 PM<BR>> > >> > To: NSRCA Mailing List<BR>> > >> > Subject: Re: [NSRCA-discussion] OS 140Rx pump question<BR>> > >> ><BR>> > >> ><BR>> > >> > John,<BR>> > >> ><BR>> > >> > What pipe? What fuel? What prop are you using?<BR>> > >> > Lengthen your pipe till the midrange richness goes away. My OS<BR>> > >> > will do the<BR>> > >> > same thing. The needle on mine is about 3/4 turn out also . I would<BR>> > >
not<BR>> > >> > mess with the pump till you have tried lengthening the pipe. This<BR>> > > almost<BR>> > >> > always fixes that problem. Less load(smaller prop) on the engine<BR>> > > shorten<BR>> > >> > pipe, more load(larger prop)lengthen the pipe.<BR>> > >> ><BR>> > >> > Wayne Galligan<BR>> > >> > ----- Original Message -----<BR>> > >> > From: "John Pavlick" <jpavlick@idseng.com><BR>> > >> > To: "NSRCA Discussion" <nsrca-discussion@lists.nsrca.org><BR>> > >> > Sent: Sunday, September 24, 2006 12:29 AM<BR>> > >> > Subject: [NSRCA-discussion] OS 140Rx pump question<BR>> > >> ><BR>> > >> ><BR>> > >> > > I'm having some trouble with my OS
140Rx and it seems to me that<BR>> > >> > > maybe<BR>> > >> > > somebody played with the pump (I bought this motor used). Here's<BR>> > > what's<BR>> > >> > > going on. The main needle wants to be at about 3/4 turns out. Not<BR>> > >> > > even<BR>> > > a<BR>> > >> > > full turn. If I open it to 1 1/4 turns it's slobbering<BR>> > rich. The idle<BR>> > > is<BR>> > >> > > rich even with the adjustment turned fully clockwise. It is<BR>> > >> > flyable, but I<BR>> > >> > > know something isn't right. This motor also has a<BR>> > dual-plug OS head.<BR>> > >> > > I<BR>> > >> > have<BR>> > >> > > an "F" plug in the center and an "8" in the rear. The transition<BR>>
> >> > > isn't<BR>> > >> > > great, especially at about 1/2 throttle. On the ground it will<BR>> > > actually<BR>> > >> > load<BR>> > >> > > up sometimes. In the air it's not so bad but it doesn't sound<BR>> > >> > right. If it<BR>> > >> > > had a Perry pump I'd back off the pressure and that would<BR>> > >> > probably fix it.<BR>> > >> > > Like I said, I'm thinking someone played with the pump for whatever<BR>> > >> > reason.<BR>> > >> > > Is there any way to set it up as it was originally or do I have<BR>> > >> > to send it<BR>> > >> > > back to the service center?<BR>> > >> > ><BR>> > >> > > John Pavlick<BR>> > >> > >
http://www.idseng.com<BR>> > >> > ><BR>> > >> > > --<BR>> > >> > > No virus found in this outgoing message.<BR>> > >> > > Checked by AVG Free Edition.<BR>> > >> > > Version: 7.1.405 / Virus Database: 268.12.8/455 - Release Date:<BR>> > > 9/22/06<BR>> > >> > ><BR>> > >> > > _______________________________________________<BR>> > >> > > NSRCA-discussion mailing list<BR>> > >> > > NSRCA-discussion@lists.nsrca.org<BR>> > >> > > http://lists.nsrca.org/mailman/listinfo/nsrca-discussion<BR>> > >> > ><BR>> > >> ><BR>> > >> > _______________________________________________<BR>> > >> > NSRCA-discussion mailing list<BR>> > >> >
NSRCA-discussion@lists.nsrca.org<BR>> > >> > http://lists.nsrca.org/mailman/listinfo/nsrca-discussion<BR>> > >> > --<BR>> > >> > No virus found in this incoming message.<BR>> > >> > Checked by AVG Free Edition.<BR>> > >> > Version: 7.1.405 / Virus Database: 268.12.8/455 - Release<BR>> > Date: 9/22/06<BR>> > >> ><BR>> > >> --<BR>> > >> No virus found in this outgoing message.<BR>> > >> Checked by AVG Free Edition.<BR>> > >> Version: 7.1.405 / Virus Database: 268.12.8/455 - Release Date: 9/22/06<BR>> > >><BR>> > >> _______________________________________________<BR>> > >> NSRCA-discussion mailing list<BR>> > >> NSRCA-discussion@lists.nsrca.org<BR>> > >>
http://lists.nsrca.org/mailman/listinfo/nsrca-discussion<BR>> > >><BR>> > ><BR>> > > _______________________________________________<BR>> > > NSRCA-discussion mailing list<BR>> > > NSRCA-discussion@lists.nsrca.org<BR>> > > http://lists.nsrca.org/mailman/listinfo/nsrca-discussion<BR>> ><BR>> > _______________________________________________<BR>> > NSRCA-discussion mailing list<BR>> > NSRCA-discussion@lists.nsrca.org<BR>> > http://lists.nsrca.org/mailman/listinfo/nsrca-discussion<BR>> > --<BR>> > No virus found in this incoming message.<BR>> > Checked by AVG Free Edition.<BR>> > Version: 7.1.405 / Virus Database: 268.12.9/456 - Release Date: 9/25/06<BR>> ><BR>>--<BR>>No virus found in this outgoing message.<BR>>Checked by AVG Free Edition.<BR>>Version: 7.1.405 /
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