[NSRCA-discussion] YS points of interest

Tue Oct 20 07:32:59 AKDT 2009

"Old" phonograph?  I still listen to "old" LP's.  Maybe we can divert the snap discussion to analogue .vs. digital  ;)

Bob Kane

getterflash at yahoo.com

--- On Tue, 10/20/09, Bill Glaze <billglaze at bellsouth.net> wrote:

From: Bill Glaze <billglaze at bellsouth.net>
Subject: Re: [NSRCA-discussion] YS points of interest
To: "General pattern discussion" <nsrca-discussion at lists.nsrca.org>
Date: Tuesday, October 20, 2009, 10:41 AM

#yiv1686051102 DIV {
MARGIN:0px;}

The cam lubrication is interesting, as well as 
helpful..  The highest unit loading in the usual poppet valve engine, is at 
the cam/lifter junction.  (Remeber the old phonograph with the needle; the 
unit loading at the tip of the needle was as much as 5,000 # psi.)
Bill Glaze

  ----- Original Message ----- 
  From: 
  Koenig, Tom 
  To: 'General pattern 
  discussion' 
  Sent: Tuesday, October 20, 2009 12:56 
  AM
  Subject: Re: [NSRCA-discussion] YS points 
  of interest

  Thanks Chris, but its hardly worth an article????...... I'm 
  far from a YS genius. I have come across a few in my time however.....just 
  look for the guys with the blown off props and spinners, deadsticks and 
  always  're-tuning' their motor (usually in the pits). Nothing 
  scares me more than some peanut 'tuning' a YS at full song in the 
  pits!!

  I'm sure we all know these experts ...trust me...they 
  exist, even down here!!! But funnily, the guys that couldnt get a YS to run 
  are now also having trouble with electric. Interesting? 
  hehehehehehehehehe

  Now the CDI....keep those Boxes cool. It MAY 
  help....but the CDI is another story which I am only just learning to 
  read!

  Maybe I'll take a few pics and scribble something about what 
  I do...

  Tom

  From: nsrca-discussion-bounces at lists.nsrca.org 
  [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of krishlan 
  fitzsimmons
Sent: Tuesday, 20 October 2009 2:01 PM
To: 
  General pattern discussion
Subject: Re: [NSRCA-discussion] YS points 
  of interest

  Good 
  tip's Tom!

Would make a nice Kfactor article. hint hint 

  Chris 

  From: "Koenig, Tom" 
  <Tom.Koenig at actewagl.com.au>
To: NSRCA 
  <nsrca-discussion at lists.nsrca.org>
Sent: Mon, October 19, 2009 6:49:33 
  PM
Subject: 
  [NSRCA-discussion] YS points of interest

  Hi 
  all,

  Just a little 
  topic diverter, for all us 'oilers'.

  Some background. 
  Generally in Aus, most people mix their own fuel as it is simply too cost 
  prohibitive to use pre-mix. 99.9% use the Coolpower oils. We have the three 
  types available; Blue (SV), Red (LV) and Purple(MV).

  I have just 
  rebuilt 3 different YS motors,all running on different oils. Nitro content is 
  25-30% depending on motor and application, Nitro brand is VP. 
  The  methanol was Spectro C analysed for purity and water content ( 
  perfect results)

  I have found: ( 
  your mileage may vary <VBG>)

  The LV oil 
  produces marginally ( empirically tested) power, however significant corrosion 
  and wear was found in the motors using this oil. Cam was badly worn 
  also.

  The standard Blue 
  oil motor had by far the least wear, virtually no corrosion and only 
  small expected, standard wear ( liner, bearing play and ring gaps. Cam was 
  perfect)

  The MV oil, which 
  as expected, was somewhere in between the two.

  Conclusion for my 
  own future use:

  I will cease to 
  use the Heli oil in my motors as of now, unless I need to milk a motor for 
  every last bit of power OR if I am happy to rebuild more 
  often.

  The MV does seem 
  like a good compromise, but I'm happy with the Blue oil. Its the original, and 
  in my opinion only, still the best general performing oils of 
  all.

  Also-IF any of you 
  are actually still using the YS, here are a few other tips. I have two brand 
  new 170's-one CDI and one Glow. Both motors had virtually NO oil in the cam 
  area out of the box. I would recommend that you open the cam cover and squirt 
  it full of oil before you start these for the first time. I feel it helps and 
  may just prevent undue cam wear.

  I always strip, 
  rework and Ultra sonically clean my motors before I run them-so I do this 
  anyway, but for those that don't want to go to these extents-The oiling of the 
  cam is easily done.
  Another little 
  tip-lap the valves in. I just use one of those eraser tipped pencils, cyno'd 
  to the valve, and then spin the pencil with some fine valve grinding paste on 
  the seat. This works a treat, every time.( obviously, disassemble the head 
  first)

  Now feel free to 
  practice those snaps that we talked about ,with that little powerhouse of 
  an engine <G>

  Tom

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