[NSRCA-discussion] OS 140 Rx re-visited

[Del K. Rykert]

Thanks for sharing what you found and its resolution John.

Del

----- Original Message ----- 
From: "John Pavlick" <jpavlick at idseng.com>
To: "NSRCA Discussion" <nsrca-discussion at lists.nsrca.org>
Sent: Tuesday, September 26, 2006 7:32 PM
Subject: [NSRCA-discussion] OS 140 Rx re-visited


> Thanks everyone for all the advice and info. I made a few changes to my
> setup and the 140 is running MUCH better. The mid-range is WAY better. It
> has one little flat spot just below 1/2 throttle but it's nothing like the
> way it was. The main needle is now 1 1/8 turn out. The idle mixture is at
> about the 1 o/clock position. I can send detailed info if anyone is
> interested but basically the main problems were:
> 1. Needed to remove 2 of the 3 head gaskets (previous owner was running
> higher nitro).
> 2. Pipe installed length was about 1" too short. Now it is at 26 3/4" from
> piston face - through the header - to the first baffle in the Aeroslave
> pipe.
> It's too dark to get tach. readings tonight but I still need to fly it and
> fine tune everything anyway.
> Just simple stuff. This motor is a little bit more fussy than an OS 160. 
> OK,
> so I learned something. This is what happens when you're under-compressed
> and the pipe is too short.
>
> John Pavlick
> http://www.idseng.com
>
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