Minto 170

[Brian Young]

Oh come on your just trying to stir things up.....lol


--- Hotrod34a at aol.com wrote:
>     You know, I don't usually say to much and keep
> my mouth shut most of the 
> time on this list, but it's time someone spoke up on
> this issue.  In the last 
> several months there has been several thousand posts
> on this discussion group 
> about 2 strokes, adjusting pipe length and tuning 2
> strokes, bearing issues, 
> sealed vs not, stainless vs not, after market vs
> standard factory bearings, 
> gee, I got 200 flights on my stainless bearings vs
> 30 flights on the factory 
> bearings, after run oil for 2 strokes, whether to
> use it or not, whether to run 
> them dry after flying or not, dual plug heads vs
> single plug heads, and so on....
>     In the last several months I have only seen less
> that a dozen posts about 
> a YS engine, and most of those were how to type
> questions, not problem 
> issues.  Last week there was one post about which
> port to hook up the return fuel 
> line to, and Don Ramsey's problem with his YS.  How
> do you figure that you could 
> not get a word in edgewise?????  I guess that when
> some folks start flying 2 
> strokes, they forget how to count........As some
> would say....flame suit 
> on.......Larry.....
> 
> Brian,
> Interesting ying and yang here on engines.  2 stroke
> tuning problems don't 
> arise that often, and last week you couldn't get a
> word in edgewise for all the 
> YS blues!!
> 
> it's not common that the midrange would be lean,
> especially on the full 
> Mintor setup.  I haven't seen that.  The pipe is an
> essential part of balancing the 
> mixture in a 2 stroke and I know the Mintor pipe
> produces an even mixture, 
> even if not top power.  Please check the engine
> cooling.  This can significantly 
> affect performance.  Fly with the cowl off for
> comparison.  If there's a 
> difference, then maybe you need more exit area, or
> another hole in the bottom of 
> the chin cowl behind the engine.  
>     If the engine is lean in midrange it will get
> very hot in the air and 
> this is not good.  I've seen one engine where the
> owner decreased teh pump 
> pressure so much that it went lean in midrange and
> he nearly burned it up.  Are you 
> still at the factory pump setting?  If you've
> decreased the pump pressure, 
> then increase it again.  If you are flying 10%, then
> increase to 15%.  Some 
> engines of early vintage prefer a bit more nitro. 
> Another way to richen the 
> midrange is to shorten the header.  This is not my
> first suggestion though, because 
> the factory setup works fine, however I've
> experimented with doing this and 
> found that the 170 will gain a lot more power on a
> slightly shorter pipe at the 
> expense of a richer midrange.  Normally, this is a
> bad thing.
>    I have had good luck with setting everything a
> slight bit rich on the 
> ground.  This is not because I'm expecting it to
> lean out in the air, but because 
> I think it helps the engine slow down faster and it
> doesnt' spool up on 
> downlines.  
> 
> --Lance
> 



	
		
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