Bolly pipes & mufflers

[NSRCA]

Hi folks,

Just a point of clarification - the 480, 590 and 565 are mufflers only, not
tuned pipes, so comparing them to the ES pipe isn't really apples to apples.
The EQ140R would be a more appropriate comparison, as it is properly baffled
for an rpm boost.  Different products for a different applications - the
mufflers were developed when popular opinion was that there was more than
enough power available in the 140 2Cs and that the boost wasn't needed.  Now
that the current crop of F3A kits are getting HUGE, the tuned pipe boost is
back in vogue.

BTW, we're working with the gent who posted about the Bolly pipes "leaking"
and "gaining weight" to sort out what's up.  While they do "weep" for the
first few flights till the resin stabilizes, and they can be ruined if they
get cooked (as can all c/f pipes) it's the first we've heard of anything
like this, so the research continues.  If any other Bolly pipe/muffler users
have had this problem, would you please contact me directly.

Thanks!
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 Woodward James R Civ 412 TW/DRP/ACQ
  Sent: May 5, 2003 11:21 AM
  To: discussion at nsrca.org
  Subject: RE: 3M Mintor 170 questions


  Hi Eric,



  I've had the Bolly 480, 590, and 565.  The 565 worked the best on the
ST2300.  However, each of these pipes was easily outperformed by the ES.
The 3M carbon pipe has the first baffle in the same location as the ES
2-cycle pipe I have and it looks very similar in overall dimensions.  If I
remember correctly, the first baffles of all the Bolly pipes were a lot
closer to the neck opening than the ES or 3M pipes.  The 3M carbon pipe has
an AL neck insert, and its note is similar to an Asano pipe I've heard run
on Donny Wright's OS RX.  The Greve pipe has a longer first baffle
dimension, so you'll need to run a shorter header length to get the same
tuning as the ES/OS type of pipes.  With the 17 x 13, you'll need all the
power your can muster mister!

  Jim W.



  I noted a 2" difference in the 1st baffle position in the Bolly pipe to
the OS and OS clones. Do you have tuning distances for the 17 x 13 APC and
the Bolly pipe, by any chance??



  Regards,

  Eric.

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