RE: 4 stroke pick?  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Glow Engines >> RE: 4 stroke pick?
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[Poll]

4 stroke pick?
Saito 125
  43% (40)
OS 120
  19% (18)
YS 120
  36% (34)


Total Votes : 92
(last vote on : 9/29/2008 9:49:35 AM)
(Poll will run till: -- )
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RE: 4 stroke pick? - 7/28/2006 5:06:14 AM   
MOTORMAN37



Posts: 2088
Joined: 10/26/2002
From: CLINTONVILLE, WI, USA
Status: online 		Stevel,
I would be willing to bet there is more than a couple hundred rpm difference. Do you have to run the Saito on 30% to get any power out of it. My 1.10 turns a APC 16-6 @ approx 9,800 on 20/20. I have even run a 16-8 APC @ approx 9,000 on 20/20. If the 1.25 is as powerfull per cubic inche as the 1.00 there is no way possible that it is anywhere near a YS 1.10. My Saito 1.00 only turns a 15-6 @ 8,800. I am pretty sure if you ran them both on 30% the gap between the two would grow drasticaly. I a m not nocking Saito's, I have some now and have run them for years, but they are no match for a YS, not by a long shot when it comes to performance, idleing, and transition.

(in reply to MOTORMAN37)
       Post #: 26

RE: 4 stroke pick? - 7/28/2006 6:35:49 AM   
Richard L.



Posts: 8775
Joined: 7/28/2002
From: Redmond, WA, USA
Status: offline
quote:

ORIGINAL: blw

The other one backfires, throws props, barely runs and the guy knows how to tune engines.

Yeah, but apparently he didn't follow directions and got the needles backward. If the engine backfires and throws props, then it's a tuning issue. Any four stroke that runs too lean will throw props. Incompetent tuner


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(in reply to blw)
       Post #: 27

RE: 4 stroke pick? - 7/28/2006 8:35:30 AM   
bla bla


 

Posts: 1580
Joined: 9/19/2002
From: Oslo, NORWAY
Status: offline

quote:

YS parts and service are not available in Europe.


Stelios


Yes it is Stelios, Probuild in the UK. My YS's go there annually for strip down rebuilds/services.
I carry a box of spare screws, gaskets, piston rings and O rings, diaphrams, valves etc etc and have done quite a few ring changes at the feild.
Sure their very powerful and I absolutely love them but I certainly wouldn't recommend them as a sports engine.
Don't know many people that would.
Motorman has been plugging these engines for years, he must be a YS/CP salesman on commission.

< Message edited by bla bla -- 7/28/2006 3:00:52 PM >

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       Post #: 28

RE: 4 stroke pick? - 7/28/2006 12:53:34 PM   
Build-n-flyer-RCU



Posts: 1049
Joined: 9/26/2002
From: Evans, GA, USA
Status: offline 		First off, YS engines are much more powerful for their size so when comparing pros/cons for a given application then think this way:
---YS91 or Saito 125
---YS110/120 or Saito 150
---YS140 or Saito 180
---YS160 or Saito 220
If you don't have much room in the cowl and want max power then YS is hands-down the way to go. Otherwise you can get more bang for the buck with the larger Saito (YS's are expensive).

As for reliability my YS's have been much easier to break in and set up than my Saitos. I've never had a dead-stick with my 110's or my 160DZ. The only Saito I can say that for is my 200Ti, but then again I put over a gallon of fuel through the 200Ti before I even tried to fly it. The YS's require high nitro fuel but fuel usage is a bit lower for equivalent power. You can put the tank anywhere you want with a YS and don't have to worry about muffler pressure.

The downside to YS (other than price/availability) is that when there are problems they are not simple to fix. I have never had any problems with my YS's but problems do happen. A club member got a new 140 and it wouldn't run right. But he sent it back for service and got it back in a few days. I guess another downside is that you can't easily hand-start a YS, and the big ones really need a high torque starter... but I use a starter with my Saitos too.

And tuning a YS is a non-issue as long as you follow directions and use the right fuel. I think the YS tuning myth comes from people that try to tune a YS as if it were a Saito or OS, or try to use low nitro fuel or fuel that has castor in it, or have an engine that needs servicing but don't send it back. Anyone that has problems following directions should stick with Saito.

I am hardly anti-Saito, but YS makes great engines and like many others it bugs me when misinformation gets thrown around.

Walt

< Message edited by Build-n-flyer-RCU -- 7/28/2006 12:57:56 PM >

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       Post #: 29

RE: 4 stroke pick? - 7/28/2006 2:43:01 PM   
pbunn



Posts: 124
Joined: 5/19/2003
From: Spartanburg, SC, USA
Status: offline 		The Hobby Shop owner told you right. I have a YS110 in a Showtime. It is powerful, moreso than a Saito 125. It is a great engine for that plane.

It is not as easy to run as my Saitos. When presurised, it leakes fuel from the carb which I do not like. Go over to the YS help forum and see what YS service told me about the leaking.
They said "get used to it" - But go search it and see for yourself

The Saitos are easy to operate, they are less powerful but in my opinion a better "sport engine".
If you want raw power , get the YS, if you have problems , you have to "send it back" - check out the forum - that is repeated over and over .

If you want and easy to use steady, powerful engine, get the Saito 125 and break it in as the mfg recommends.

It is really a matter of max power vs ease of use.

I don't think OS or magnum are in the picture as they are both heavier and produce less power although I have two Magnums and they run great and steady - but with less power


(in reply to Build-n-flyer-RCU)
       Post #: 30

RE: 4 stroke pick? - 7/28/2006 3:31:53 PM   
pbunn



Posts: 124
Joined: 5/19/2003
From: Spartanburg, SC, USA
Status: offline 		SteveL

I got your PM and sent a return but it bounced with the message that you had PM disabled.\

Pat Bunn

email pbunn@patbunn.com

< Message edited by pbunn -- 7/28/2006 4:14:04 PM >

(in reply to MOTORMAN37)
       Post #: 31

RE: 4 stroke pick? - 7/29/2006 2:30:49 AM   
blw



Posts: 4562
Joined: 3/15/2004
From: Auburn, AL, USA
Status: offline 		Motorman- nope. The guy who had the engine throwing props did know YS engines well. I don't know what was wrong with his. A few YS owners looked at it. I think he gave up. The other was looked over by someone you would recognize by name and he definately knows how to tune.

I'm not trying to knock YS engines but you are the one who said that you never saw one run badly and I know that I've seen them.

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       Post #: 32

RE: 4 stroke pick? - 7/29/2006 4:59:34 AM   
stephensackro


 

Posts: 74
Joined: 2/7/2005
From: Goshen, IN, USA
Status: offline 		How does the Enya 120R and the Enya 155R compare with the Saito, YS and OS engines? Anyone had any first hand experience with all of these engines?

(in reply to blw)
       Post #: 33

RE: 4 stroke pick? - 7/29/2006 3:34:26 PM   
MOTORMAN37



Posts: 2088
Joined: 10/26/2002
From: CLINTONVILLE, WI, USA
Status: online 		You allways have to release the pressure when you land and shut off the engine. The instructions tell you that, if you can take the time to read that. The carb will not drip when it is running. I never have noticed any dripping with mine. There is a couple guys in my club who have been flying YS's in pattern since they came on the market here, and we can all tune ares with no issues. If you want the best performance bar none get a YS. IF you want sport power get a Saito. But one last thing, if your tank is not mounted perfect, like happens with most ARF's , you will be back on here trying to attach a pump, or Reg to stop the Saito from flooding.
FYI,
I would be willing to bet, there is at least a 1,000 RPM difference or more between the YS and the Saito. The old .91FZ would turn 1" more dia and pitch than the 1.00 and at more RPMS.
Do a search on YS tach numbers, and you will see for yourself that most 1.10's will spin a 16-6 APC between 9,500 and 10,000 on 20/20. Running 30% requires a prop like a 17/6 to keep it under 10,000.
This is far more power than a 1.25 would ever think about, it is more comparable to a 1.50, and the YS still ways less. IF you still have wonders about your ability to tune a YS, there is allways electrics.

< Message edited by MOTORMAN37 -- 7/29/2006 4:01:58 PM >

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       Post #: 34

RE: 4 stroke pick? - 7/29/2006 5:11:50 PM   
Hobbsy



Posts: 10677
Joined: 12/2/2001
From: Colonial Beach, VA, USA
Status: offline 		MM37, It's hotter than h-e two sticks here but I'm going to try a head to head with my .91FZ and Saito 1.25GK using a Graupner 15x8 two blade. I'll run some kind of green 20/20, CoolPower I think, it ain't mine, in the YS and WildCat 15% Premium Extra in the Saito. They should be close to dead even but who knows.

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       Post #: 35

RE: 4 stroke pick? - 7/29/2006 5:44:46 PM   
bla bla


 

Posts: 1580
Joined: 9/19/2002
From: Oslo, NORWAY
Status: offline 		Nobody is doubting the power of YS campared to other brands Motormann but you're starting to sound like a stratched record... without wanting to sound insulting which isn't my intention. YS are great, they're super powerful but that doesn't make them the idea engine... the most powerful yes....The most practical... no.

For a general sports flying OS, Saito would make a far better choice for the wast majority of people, period. They're not as powerfull, we all agree on that, but they're just generally more suited to more applications under far more circumstances. What happens when something goes wrong with you're YS... do you carry spare parts, does your buddy flying next to you know what's the problem? 9 times out of 10 that just wont be the case. You'll be sending the engine in for service, ordering the parts... the point is, if it is an OS or Saito theres are real good chance that you're not the only one flying that engine. People have spare bits and pieces back at the work shop, or real easy stuff you can pick up local and do a quick fix. This is worth a million for a happy sports pilot. Sure you've got a few extra R's on the YS, but aleast he's flying and no waiting for some parts to be delivered.

Back on topic, the Enya 1.55R is an absolute cracking engine! If you have the chance to buy one, get it. They are beautifully constructed and will last a life time.
Mine you, I still believe the average Joe would be happier, more flying days a year, running an OS or a Saito.
But that 155R is an absolute darling.

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       Post #: 36

RE: 4 stroke pick? - 7/29/2006 5:58:31 PM   
MOTORMAN37



Posts: 2088
Joined: 10/26/2002
From: CLINTONVILLE, WI, USA
Status: online 		bla-bla,
I don't mean to sound like a scratched record, but it is the only way to get across to some of you guys. How many guys carry anything extra for a Saito or an OS. Parts for YS's are readibly accessible through central hobbies for instamce, and there service is far faster than Horizon or Great plaines. I can order something from Central and have it in 2-3 days. They will ship the order the same day "Tower Does not". Some of you guys are making the YS sound alot more complicated than it really is to operate.
It all comes down to "what kind of power do you want". Do you want an engine that barely hover's and you have to feed it 30%, or do you want a engine that transitions, Idles, and runs like no other engine out there.
The answere is yours, but it you are not skilled enough to run and maintain it, then please do not waste your money on it, leave it on the shelf for the fliers who will appreciate it, and know waht the engine is capable of.

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       Post #: 37

RE: 4 stroke pick? - 7/29/2006 7:30:40 PM   
StevL


 

Posts: 88
Joined: 2/14/2006
From: Irmo, SC, USA
Status: offline 		For the record my Saito 125 spinning a 16X4W prop will tach 9500 and running on 15%. I richened it to spin it at 9,100 and it pulls my UCD vertical with no problem.

I was thinking I would like even more power on this showtime since it can stall easier. Another question could also be; How quickley should I be able to pull up 50 feet vertical from a steady hover? Please don't touch this question on this thread!

I'm going to pull the Saito and run it in the showtime just to see how I like it (before I purchase another engine). I'm also going to try 30% and spin a 17X4W prop. I'll post my thoughts... just remember I'm a newbie and do not have the vast history of flying many models or using many engines.

< Message edited by StevL -- 7/29/2006 8:03:57 PM >

(in reply to MOTORMAN37)