Pipes - Plugging After Long Use - Cleaning?

[Brian Young]

Wayne, thanks again for the answer on this. I did as
you suggested and plugged the stinger end and filled
the pipe with acetone. An overnight soak wasnt
adequate so I left it over the weekend, it is much
easier to blow through now. Is the baffle at the rear 
the one most likely to restrict or are the others
further upstream likely also, I didnt have engough
acetone to fill more than 8 inches from the stinger.

I suppose this is a potential affliction with any pipe
depending on how long you use it. This thing has a
hundred or so gallons of fuel exhausted through it.


--- Wayne Powell <service at clubmanprops.com> wrote:
> Hi Brian,
> 
> Plug the stinger end of the pipe
> Get some acetone/thinners and fill the pipe about
> half full
> Shake the acetone around in the pipe for a few
> minutes
> plug the other end of the pipe and let sit overnight
> on it's side
> roll the pipe 180' and let sit overnight again
> Shake on last time then dump out the carbon/acetone
> mix
> 
> I'm not sure what carb cleaner will do to the pipe -
> that's pretty strong
> stuff.
> 
> The way the Bolly pipe is designed uses baffles with
> 2mm slots cut around
> the edges.  Over time these can plug if you run rich
> or hot and don't clean
> the pipe out at least once per year.  This is
> mentioned in the instructions
> that come with the pipe.  You'll get your 1000 RPM
> back once cleaned.
> 
> Please let me know how it goes.
> 
> Wayne Powell
> Bolly Props North America
> http://www.BollyProps.com
> 1-877-WEFLYRC
> 
> > -----Original Message-----
> > From: discussion-request at nsrca.org
> > [mailto:discussion-request at nsrca.org]On Behalf Of
> Brian Young
> > Sent: June 19, 2003 7:23 PM
> > To: discussion at nsrca.org
> > Subject: Pipes - Plugging After Long Use -
> Cleaning?
> >
> >
> > I think Ive heard of this before but has anyone
> ever
> > experienced a pipe becoming plugged after
> prolonged
> > use. This is a Bolly 590 which has been used for
> three
> > seasons now. I couldnt figure out why I was down
> > 500-600 rpm, 2 stroke engine is fairly freshly
> > rebuilt, runs ok, just down on RRRRsss. I finally
> put
> > the thing on my test stand and noticed the pipe
> was
> > hard to blow through, swapped the pipe with
> another
> > one and found 1000 rpm.
> >
> > Now it turns 17x10N at 8500 on 25% w/ Bolly 565n
> > Was at 7500 on 25% on the plugged Bolly 590.
> >
> > Normally I run on 15%, but was curious whether
> nitro
> > would pickup the rpm before I figured the pipe
> must be
> > restricted.
> >
> > Is it possible to clean the semi plugged pipe out?
> Ive
> > been trying carb cleaner.
> >
> > =====
> > Brian Young
> > Tulsa
> > b4598070 at yahoo.com
> > 918-745-6046h
> > 918-838-0900w
> >
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> 
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=====
Brian Young
Tulsa
b4598070 at yahoo.com
918-745-6046h
918-838-0900w

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