YS 140 DZ life time

Sun Nov 16 18:09:47 AKST 2003

Huh --Troy you don't leave the engine stopped long enough for rust to 
start.HA

Jim Ivey

jivey61 at msn.com

>From: "Troy Newman" <troy_newman at msn.com>
>Reply-To: discussion at nsrca.org
>To: discussion at nsrca.org
>Subject: RE: YS 140 DZ life time
>Date: Sun, 16 Nov 2003 19:05:02 -0800
>
>Yes sometimes after long number of flights you can take the valves 
>out...They will get some carbon type buildup on the stem....actally the 
>Exhaust valve....You can scrape it off....I actually will use an x-acto and 
>just be careful with it.....Don't mess with the valve seat area...just the 
>stem...I have not really had any issue with rust or bearings or anything 
>like that...I run only Cool Power 30% heli and don't run it dry or use any 
>kind of after run...I just leave the oil and fuel sit in the 
>motor.....Seems to work for me...but your milage may vary.
>
>TN
>
>
>>From: Mr LUMIA <MARC.LUMIA at wanadoo.fr>
>>Reply-To: discussion at nsrca.org
>>To: "'discussion at nsrca.org'" <discussion at nsrca.org>
>>Subject: RE: YS 140 DZ life time
>>Date: Sun, 16 Nov 2003 09:00:06 +0100
>>
>>	Good info Troy.
>>
>>	What about the cylinder head, including valves ?
>>	I found them very dirty after this number of flights.
>>	The burning of Cool power fuel "heli 30%(nitro)" inside the YS  leaves 
>>some rests on 	both valves.
>>
>>	Marc
>>
>>-----Message d'origine-----
>>De:	Troy Newman [SMTP:troy_newman at msn.com]
>>Date:	dimanche 16 novembre 2003 01:16
>>À:	discussion at nsrca.org
>>Objet:	Re: YS 140 DZ life time
>>
>>Top power just like with any other ringed motor will be at about 200
>>flights....Once you get over 200 it will loose a little and maintain for
>>about another 200-300...The difference is about 200-300 rpm tops....So you
>>can get consistent and good power out of the motor for about 300-400 
>>flights
>>easy.....After that I have found that the ring is all that needs replaced.
>>
>>If you want that back to the tip top performance you can stick a new ring 
>>in
>>it now...about $20....
>>
>>This is about the same life as I found with the YS-140FZ's, 140L's and 
>>even
>>when I ran the OS 140EFI....
>>
>>Best power was when things were less than 200 flights....Most people don't
>>realize the power loss at the 200 flight mark because they have so much
>>extra....But I keep really good tabs on what RPM my motors are
>>running....Last year I had a couple motors each with over 500 flights on
>>them and when I changed the ring, piston and sleeves the power was back to
>>amazing....
>>
>>The difference is really the difference between the restrictor and 
>>not.....
>>
>>So to answer you question a new ring could be in the near future on the
>>motor with about 160 flights...and you are about 1/2 way there on the 
>>other
>>motor.....They will last long past still making excellent power...but will
>>taper off slowly. This is common on all the ringed motors....
>>
>>
>>Now one thing the DZ has going for it...the new piston doesn't get out of
>>round as easy as the early relieved and dished pistons on the 120SC, 
>>140FZ,
>>and 140L's
>>
>>So the piston is much more robust on the DZ....By the way this new piston 
>>is
>>also in the 140 FZ2 (USA-Its the FZ Sport)...This new piston will also fit
>>in any of the 140's.....
>>
>>Plus the DZ is not the high compression and super charged setup that the
>>140L is and its better on all the other parts like cam gears and the
>>pistons, rings and so on.....
>>
>>This has been my experience I have 3 motors and been running 2 of them 
>>since
>>May 2001.....I have about 800flights on one motor, 600 on another and 
>>about
>>200 on a newer one from this year.
>>
>>The two older motors have gotten cam gears, bearings, new o-rings, 
>>gaskets,
>>and pistons, and sleeves as well as the new rings. But these have mega 
>>time
>>on them and have been excellent running motors....
>>
>>Another place to look for power loss is in your header and pipe. I thought 
>>I
>>had a weak motor this past spring...When I changed pipes from a 5-6 year 
>>old
>>Hatori I gained about 400 rpms.
>>
>>
>>
>>Troy Newman
>>
>> >From: Mr LUMIA <MARC.LUMIA at wanadoo.fr>
>> >Reply-To: discussion at nsrca.org
>> >To: "'discussion at nsrca.org'" <discussion at nsrca.org>
>> >Subject: YS 140 DZ life time
>> >Date: Sat, 15 Nov 2003 07:51:52 +0100
>> >
>> >	I currently use two YS 140 DZ coming from Central Hobbies, no problem ,
>> >			very nice engines, running with Cool Power fuel 30% nitro, APC 16*12 
>>at
>> >			8600 RPM for FAI F3A pattern.
>> >First is 160 flights old, second 90 flights.
>> >Now the first one seems to loose little power after one year of use.
>> >
>> >What do you know about the life time of this engine ?
>> >Which spare parts have to be changed after which number of flights ?
>> >
>> >Marc Lumia
>> >
>> >France
>> >
>> >
>> >-----Message d'origine-----
>> >De:	discussion-request at nsrca.org [SMTP:discussion-request at nsrca.org]
>> >Date:	mardi 11 novembre 2003 23:58
>> >À:	marc.lumia at wanadoo.fr
>> >Objet:	Welcome
>> >
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