[NSRCA-discussion] OS 140Rx pump question

Tue Sep 26 04:27:14 AKDT 2006

Since moving to the northeast ~20 years ago, I've burned probably 1,000 gallons of S&W, and I've occasionally run varied oil contents w/ w/o castor, in everything from 2C 32, 50, 60, 140, 150, 160s piped and unpiped, and 4Cs 56, 72, and 120.  Mostly Webra, OS, YS, and Saito.  I never found a benefit to running pure synthetic.  With 2% castor, corrosion protection and bearing life is clearly better, and I've never had a problem with varnish/gumming in pumps or on wristpins.  Might be worth noting that S&W uses only medical grade castor and over the years S&W has eliminated most of the middlemen in the supply chain for ingredients in the fuel, so all the ingredients are very fresh and direct.

I've always run engines dry, and used after run oil (either Mobil-1 synthetic or Amsoil MP).  And, for those that need to know, I'm not sponsored by S&W, Mobil, or Amsoil.

Regards,

Dave Lockhart
DaveL322 at comcast.net

-------------- Original message -------------- 
From: "Rick Wallace" <rickwallace45 at hotmail.com> 

John -
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. 
Others' experience may vary with fuel brands, but I doubt that castor gumming is your issue here. 
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. 
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. 
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. 

From:  "John Pavlick" <jpavlick at idseng.com>
Reply-To:  NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>
To:  "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Subject:  Re: [NSRCA-discussion] OS 140Rx pump question
Date:  Mon, 25 Sep 2006 23:25:36 -0400
>OK, I usually run Magnum but I haven't picked up my winter supply yet. Guess
>I should take a ride...
>
>John Pavlick
>http://www.idseng.com
>
>
> > -----Original Message-----
> > From: nsrca-discussion-bounces at lists.nsrca.org
> > [mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of
> > Lance Van Nostrand
> > Sent: Monday, September 25, 2006 10:33 PM
> > To: NSRCA Mailing List
> > Subject: Re: [NSRCA-discussion] OS 140Rx pump question
> >
> >
> > Add this advice to mine. I support this.  Magnum 15% also is fine.  I've
> > tested a lot of fuels and would not put Omega through a pumped
> > engine ever.
> > CoolPower has the highest detergent factor of all the fuels I've
> > tested so
> > it is an excellent suggestion to start wtih.
> > --lance
> >
> > ----- Original Message -----
> > From: "Wayne Galligan" <wgalligan at texasairnet.com>
> > To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
> > Sent: Sunday, September 24, 2006 7:51 PM
> > Subject: Re: [NSRCA-discussion] OS 140Rx pump question
> >
> >
> > > First thing I would do is switch over to regular Cool Power.
> > Omega has
> > > castor oil and it can gum up or varnish in the engine.  You will have a
> > > bear
> > > of a time getting the rod to slide on the piston wrist pin
> > because of the
> > > castor gumming up on the pin.  The regular Cool Power uses synthetic and
> > > does not gum up on any of the parts.
> > >
> > > The pipe length sounds about right.  But one inch short and it will run
> > > fat
> > > in the midrange.  Try a little longer and switcging to Cool Power 15% or
> > > 20/20 blend
> > >
> > > Wayne
> > >
> > >
> > > ----- Original Message -----
> > > From: "John Pavlick" <jpavlick at idseng.com>
> > > To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
> > > Sent: Sunday, September 24, 2006 7:49 PM
> > > Subject: Re: [NSRCA-discussion] OS 140Rx pump question
> > >
> > >
> > >> Sorry - Aeroslave pipe, APC 15.75x10 3-blade (re-pitched by Dave L.).
> > >> Fuel
> > >> is morgan Omega 15%. The pipe is currently set at 31 3/4" straight-line
> > > from
> > >> plug center to the end of the pipe with an OS O-ring header. I
> > know this
> > >> measurement only makes sense if using the same header or at least one
> > >> with
> > >> the same total length.
> > >>
> > >> John Pavlick
> > >> http://www.idseng.com
> > >>
> > >>
> > >> > -----Original Message-----
> > >> > From: nsrca-discussion-bounces at lists.nsrca.org
> > >> > [mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of
> > >> > Wayne Galligan
> > >> > Sent: Sunday, September 24, 2006 8:31 PM
> > >> > To: NSRCA Mailing List
> > >> > Subject: Re: [NSRCA-discussion] OS 140Rx pump question
> > >> >
> > >> >
> > >> > John,
> > >> >
> > >> > What pipe? What fuel? What prop are you using?
> > >> > Lengthen your pipe till the midrange richness goes away.  My OS
> > >> > will do the
> > >> > same thing.  The needle on mine is about 3/4 turn out also .  I would
> > > not
> > >> > mess with the pump till you have tried lengthening the pipe.  This
> > > almost
> > >> > always fixes that problem.  Less load(smaller prop) on the engine
> > > shorten
> > >> > pipe, more load(larger prop)lengthen the pipe.
> > >> >
> > >> > Wayne Galligan
> > >> > ----- Original Message -----
> > >> > From: "John Pavlick" <jpavlick at idseng.com>
> > >> > To: "NSRCA Discussion" <nsrca-discussion at lists.nsrca.org>
> > >> > Sent: Sunday, September 24, 2006 12:29 AM
> > >> > Subject: [NSRCA-discussion] OS 140Rx pump question
> > >> >
> > >> >
> > >> > > I'm having some trouble with my OS 140Rx and it seems to me that
> > >> > > maybe
> > >> > > somebody played with the pump (I bought this motor used). Here's
> > > what's
> > >> > > going on. The main needle wants to be at about 3/4 turns out. Not
> > >> > > even
> > > a
> > >> > > full turn. If I open it to 1 1/4 turns it's slobbering
> > rich. The idle
> > > is
> > >> > > rich even with the adjustment turned fully clockwise. It is
> > >> > flyable, but I
> > >> > > know something isn't right. This motor also has a
> > dual-plug OS head.
> > >> > > I
> > >> > have
> > >> > > an "F" plug in the center and an "8" in the rear. The transition
> > >> > > isn't
> > >> > > great, especially at about 1/2 throttle. On the ground it will
> > > actually
> > >> > load
> > >> > > up sometimes. In the air it's not so bad but it doesn't sound
> > >> > right. If it
> > >> > > had a Perry pump I'd back off the pressure and that would
> > >> > probably fix it.
> > >> > > Like I said, I'm thinking someone played with the pump for whatever
> > >> > reason.
> > >> > > Is there any way to set it up as it was originally or do I have
> > >> > to send it
> > >> > > back to the service center?
> > >> > >
> > >> > > John Pavlick
> > >> > > http://www.idseng.com
> > >> > >
> > >> > > --
> > >> > > No virus found in this outgoing message.
> > >> > > Checked by AVG Free Edition.
> > >> > > Version: 7.1.405 / Virus Database: 268.12.8/455 - Release Date:
> > > 9/22/06
> > >> > >
> > >> > > _______________________________________________
> > >> > > NSRCA-discussion mailing list
> > >> > > NSRCA-discussion at lists.nsrca.org
> > >> > > http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
> > >> > >
> > >> >
> > >> > _______________________________________________
> > >> > NSRCA-discussion mailing list
> > >> > NSRCA-discussion at lists.nsrca.org
> > >> > http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
> > >> > --
> > >> > No virus found in this incoming message.
> > >> > Checked by AVG Free Edition.
> > >> > Version: 7.1.405 / Virus Database: 268.12.8/455 - Release
> > Date: 9/22/06
> > >> >
> > >> --
> > >> No virus found in this outgoing message.
> > >> Checked by AVG Free Edition.
> > >> Version: 7.1.405 / Virus Database: 268.12.8/455 - Release Date: 9/22/06
> > >>
> > >> _______________________________________________
> > >> NSRCA-discussion mailing list
> > >> NSRCA-discussion at lists.nsrca.org
> > >> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
> > >>
> > >
> > > _______________________________________________
> > > NSRCA-discussion mailing list
> > > NSRCA-discussion at lists.nsrca.org
> > > http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
> >
> > _______________________________________________
> > NSRCA-discussion mailing list
> > NSRCA-discussion at lists.nsrca.org
> > http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
> > --
> > No virus found in this incoming message.
> > Checked by AVG Free Edition.
> > Version: 7.1.405 / Virus Database: 268.12.9/456 - Release Date: 9/25/06
> >
>--
>No virus found in this outgoing message.
>Checked by AVG Free Edition.
>Version: 7.1.405 / Virus Database: 268.12.9/456 - Release Date: 9/25/06
>
>_______________________________________________
>NSRCA-discussion mailing list
>NSRCA-discussion at lists.nsrca.org
>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.nsrca.org/pipermail/nsrca-discussion/attachments/20060926/7811055f/attachment-0001.html 
-------------- next part --------------
An embedded message was scrubbed...
From: "Rick Wallace" <rickwallace45 at hotmail.com>
Subject: Re: [NSRCA-discussion] OS 140Rx pump question
Date: Tue, 26 Sep 2006 05:46:33 +0000
Size: 696
Url: http://lists.nsrca.org/pipermail/nsrca-discussion/attachments/20060926/7811055f/attachment-0001.mht 