o.s. 160 question

[george kennie]

You are a Godsend when it comes to sharing vital information, Bob.

Bob Pastorello wrote:

> 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...
> Bob Pastorello
> rcaerobob at cox.net
> www.rcaerobats.net
>
>      ----- Original Message -----
>      From: JonLowe at aol.com
>      To: discussion at nsrca.org ; flyintexan at houston.rr.com
>      Sent: Sunday, June 20, 2004 9:22 PM
>      Subject: Re: o.s. 160 question
>       In a message dated 6/19/2004 8:04:34 PM Central Daylight
>      Time, flyintexan at houston.rr.com writes:
>
>           I am running the OS in intermediate as well.  I
>           used the iron bay with some
>           success, until it locked open during a sequence,
>           flooding out the motor.  My
>           setup with the regulator and greve pipe always ran
>           rich in the midrange.  It
>           got better when I lengthened the pipe, but not
>           perfect.  With that setup it
>           flew the outside loop o.k., but I always throttled
>           up just before the very
>           bottom of the loop.  As it would come up through
>           mid range, a bit of smoke,
>           maybe a cough, and away we go.
>
>      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. Jon Lowe
>
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