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<DIV><FONT face=Arial size=2>Randy, Incheon, If you set your pipe length at 25"
, plug to reflector, you can run the APC 15.5-12 @ about 7800. Much quieter and
will go OOS , no problem.</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=randy10926@comcast.net
href="mailto:randy10926@comcast.net">randy10926@comcast.net</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, November 05, 2004 8:01
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> RE: Excelleron 90</DIV>
<DIV><BR></DIV>
<DIV> </DIV>
<DIV>You are getting 10.5K rpm with a OS91FX in a 15X8.
Impressive. I do not get much more than that with a 13X8 on the
stock muffler, which is real heavy. Think I should look into a
wraparound header to use with the MACs pipe I have. Not as long
the 140 pipe and probably only need to modify the bellypan and not the
fuse.</DIV>
<DIV> </DIV>
<DIV>Which perry pump are you using? V30? is it on the firewall?</DIV>
<DIV> </DIV>
<DIV>Randy</DIV>
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Original message -------------- <BR>
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<DIV><SPAN class=618141505-05112004><FONT face=Arial color=#0000ff
size=2>Randy,</FONT></SPAN></DIV>
<DIV><SPAN class=618141505-05112004><FONT face=Arial color=#0000ff
size=2></FONT></SPAN></DIV>
<DIV><SPAN class=618141505-05112004><FONT face=Arial color=#0000ff size=2>I
need to build pipe tunnel in the bellypan. fiberglass lay up on a PVC pipe
to make the tunnel. cut out the fuse around 4" behind the wing mounting. The
fuse will also have some glass lay up to fill the
cutout.</FONT></SPAN></DIV>
<DIV><SPAN class=618141505-05112004><FONT face=Arial color=#0000ff
size=2>The entire glass work will probably weigh similar to the unmodified
plane.</FONT></SPAN></DIV>
<DIV><SPAN class=618141505-05112004><FONT face=Arial color=#0000ff
size=2></FONT></SPAN></DIV>
<DIV><SPAN class=618141505-05112004><FONT face=Arial color=#0000ff
size=2>Karl's header is a wraparound. I think that is his specialty. Just
tell him how high the header has to be reference to the exhaust center
line.</FONT></SPAN></DIV>
<DIV><SPAN class=618141505-05112004><FONT face=Arial color=#0000ff
size=2></FONT></SPAN></DIV>
<DIV><SPAN class=618141505-05112004><FONT face=Arial color=#0000ff
size=2>Above setup is for a stock OS 91SX-H w/ an extra head shim, Perry
pump, Karl's header, 140 size carbon pipe (21" long). APC 15x8 with 20% had
10500rpm on a bench.</FONT></SPAN></DIV>
<DIV><SPAN class=618141505-05112004><FONT face=Arial color=#0000ff
size=2></FONT></SPAN></DIV>
<DIV><SPAN class=618141505-05112004><FONT face=Arial color=#0000ff size=2>I
will have to run the engine again soon since I changed the crankshaft w/
91FX's, Rear bearing with Boca SS. I am thinking about running the setup
with 16 or 17" props as Nat Penton. (I gotta look for those E-mails from
Nat)</FONT></SPAN></DIV>
<DIV><SPAN class=618141505-05112004><FONT face=Arial color=#0000ff
size=2></FONT></SPAN></DIV>
<DIV><SPAN class=618141505-05112004><FONT face=Arial color=#0000ff
size=2>Ihncheol Park</FONT></SPAN></DIV>
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