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You are a Godsend when it comes to sharing vital information, Bob.
<p>Bob Pastorello wrote:
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I can only share my "cookbook", the
results of ideas/suggestions from many people...Gene Maurice, Matt Kebajian,
Dave and Ron Lockhart, and many others...but...the OS 1.60 is ABSOLUTELY
viable, and reliable...detailed info is on my website, but here's the short
version. 1. 15% fuel, synthetic is best
2. OS 8 or A5 plug (A5 gives better midrange, and a little bit on
the top end) 3. Perry Pump, VP-30, using crankcase
pressure from a backplate tap. Mounted on the firewall. Adjusted
about 1/2 turn leaner than from factory, but adjust for optimal midrange
on the ground. 4. "Wave Length" of the the tuned
setup - I've now used 4 different kinds of pipes, and the "ball park",
for 8000-8100 is about 24.5 inches, plug center, following header, down
pipe to the reflector baffle. On conventional pipes. The Mac's
1092, a great setup, needs to be at 22 1/2, measured the same way, but
it uses rings instead of baffles. 5. Current setup
is the best I have - OS 1.60, Cool Power 15%, A5 plug, Mueller header,
AeroSlave Pre-production CF pipe, VP 30 pump, APC 15.75 x 12 (Lockhart
Re-twist), turning about 8100, pipe is at 24.5", plug to baffle (following
curve of header length) Needle is open One Turn + 2 clicks richer
from closed. Will idle all day, transitions linearly, doesn't load
up, and has beau coup power....LOTS...(ask anyone at KC this weekend!!!)
** NO ** midrange problems. Feel free to email direct for more info...
<br>Bob Pastorello
<br><a href="mailto:rcaerobob@cox.net">rcaerobob@cox.net</a>
<br><a href="http://www.rcaerobats.net">www.rcaerobats.net</a>
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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 href="mailto:JonLowe@aol.com" title="JonLowe@aol.com">JonLowe@aol.com</a></div>
<div style="FONT: 10pt arial"><b>To:</b> <a href="mailto:discussion@nsrca.org" title="discussion@nsrca.org">discussion@nsrca.org</a>
; <a href="mailto:flyintexan@houston.rr.com" title="flyintexan@houston.rr.com">flyintexan@houston.rr.com</a></div>
<div style="FONT: 10pt arial"><b>Sent:</b> Sunday, June 20, 2004 9:22 PM</div>
<div style="FONT: 10pt arial"><b>Subject:</b> Re: o.s. 160 question</div>
In a message dated 6/19/2004 8:04:34 PM Central Daylight Time, <a href="mailto:flyintexan@houston.rr.com">flyintexan@houston.rr.com</a>
writes:
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style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><font face="Arial">I
am running the OS in intermediate as well. I used the iron bay with
some</font>
<br><font face="Arial">success, until it locked open during a sequence,
flooding out the motor. My</font>
<br><font face="Arial">setup with the regulator and greve pipe always ran
rich in the midrange. It</font>
<br><font face="Arial">got better when I lengthened the pipe, but not perfect.
With that setup it</font>
<br><font face="Arial">flew the outside loop o.k., but I always throttled
up just before the very</font>
<br><font face="Arial">bottom of the loop. As it would come up through
mid range, a bit of smoke,</font>
<br><font face="Arial">maybe a cough, and away we go.</font></blockquote>
Thanks for the info. I too am running a Greve. I've tried an
Iron Bay regulator with a Cline one way valve after the IB vavel failed,
am unsatisfied with the midrange, and am ready to go to the Perry pump.
What is the length you are running on your Greve, from the glowplug, around
the header, to the end of the main body of the pipe? What prop?
I have no one around me running a similar setup, so I'm looking for a "cookbook"
formula that works. Thanks. <font size=-1>Jon Lowe</font></blockquote>
</blockquote>
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