SigMan

My Feedback: (21)

thanks everyone for the support . guess i shoulda vented elsewhere...my bad.

Hobbsy

My Feedback: (102)

http://www.cooperfuels.com/

JNorton

My Feedback: (2)

I really wanted to thank everyone that contributed to this club especially Bill Robison, Hobbsy and W8ye. I've been reading it for the last three days. I've a new Saito 125a for a GP 81" chipmunk. This post has answered my questions about extending the exhaust - 13 mm, needing a velocity stack and filter screen for better fuel economy, adding a spring for the carb drum from a .91 Saito and proper breakin techniques.

Does anyone know of a velocity stack that will fit the 125?

I know only having one Saito isn't much of a recommendation for membership but perhaps reading the 226 pages of the thread is.

William, I'd very much like to receive a copy of your distillation of this thread for my library! Too much great information not to save.

Thanks everyone,
John

w8ye

My Feedback: (16)

The Saito 125 carb barrel tends to bind when you put the spring in there? They perform well without the spring as they come from the factory.

A Saito 50 venturi will bolt onto a 125 but I'm not sure about it reducing power or not.

NM2K

My Feedback: (14)

--------------


It shouldn't be spraying from any location. I'm taking your written word literally, which I probably should not.

If it does seem to be coming from the front bearing with some force, make sure that the vent nipple is unplugged. There really shouldn't be enough oil in there at any one time to spray from anywhere if the vent is working properly.

In case you were using artistic license when you used the word "spray" - nevermind...


Ed Cregger

blw

My Feedback: (3)

David and Gary-

Thanks. This has been rougher than my other Saitos during break in. It was about the second thru fourth tank that I was asking about. It was probably too soon to lean out the LS, but I did some. It has smoothed out but still looks like it is not out of the intitial break in period. Not complaining, but was wondering. I may get a chance to put more time on it tomorrow and I'll lean everything out better.

JNorton

My Feedback: (2)

Thanks for the information W8ye. It spurred me to look further as I seemed to recall a posting on the 125 velocity stack. The older I get the harder it seems to be to remember anything.
Hobbsy was replying to Bill Robison. This thread is such a storehouse of information.
John

rajul

My Feedback: (58)

Jim is right. The carb barrel spring from the 91 will cause the 125 carb to not fully close.

JNorton

My Feedback: (2)

Thanks Mike. One last thing not to buy.

Hobbsy

My Feedback: (102)

Barry, there is no "too soon" to lean the LS needle, once the initial 20 to 30 minutes are run, go for it and you'll be pleased with the result. I never could see a corelation between running time and leaning the LS needle beyond the first 20 minutes or so, it will even work after 10 minutes.

roboto65

My Feedback: (30)

I have a ?? I have a KMP adrenelin and have my Saiton 125 in her inverted my problem is that there is NOWAY the tank center line is going to be below the carb as a matter of fact it is above it by about an 1" or so... It does run per the video earlier but was wondering if this was going to be a problem later and is there a Fix???

Hobbsy

My Feedback: (102)

I ran the Saito .62a some more today with a variety of props.
Fuel==PowerMaster 15%/18%/80/20 blend.
Plug===Saito SS
APC==12x8====9,525 rpm
APC==13x6====9,650
APC==14x6====8,330
Bolly==12.5x6==10.400
Bolly==13.5x6===9,330, exactly the same as the first day.
MAS K=12x8====9,600
MAS K=13x6====9,790
MAS 12x8 three blade=8,150
ProZinger=12x7====9,800

It weighs 16.7 oz with the prop nuts, prop washer and a 2 inch extension on the HS needle.

Great-North

I have a GP Extra 300s 40 size. I have a new Saito 82a i would like to put in it. Is a 40 size motor mount good enough? I have the black nylon one that i had my 46fx mounted to. I know i have had up to a 91fx mounted on a small mount, but i wasn't sure if it would hold out with the 82a. Thanks

RVM

For those who PM'd me with questions about my .82, here are my new results.

Set tappet using a plastic cigarette wrapper. Using the same fuel as before, 18%-20% nitro/15% oil, I gained about 400 RPM. Also, even though it is still regulated, the needles were much more sensitive relative to what they were before, and I was able to really tune the engine. I switched to Omega 25% and saw about the same power as the other fuel.

Saito .82a, about 2 gallons through it.
IB regulator
Omega 25%
APC 15x4w - 9660 peak RPM, set to 9180-9300 to fly. I'm not sure if I can get that peak again. I didn't have time to really mess with it a lot, but the next best I could get it to peak at was around 9440. Later, when I don't have as much stuff to do, I may try to tune it up a bit more since the system is regulated and lean runs are not really a concern so long as the needles are set right. Ideally I will have it 150-250 RPM off peak.
Transition is good, though midrange is still somewhat rich and there is still a little bit of a gurgle. Not sure how to tune that out. The low end is only 1/8 turn out from dying on transition. It does take a bit to spool up the heavy APC, but on the last few flights it wasn't a problem, even when doing hovering/harriers etc., though at my skill level I probably wouldn't notice if the spool up were faster.

Overall I'm much happier with the engine now. I did notice one thing - sometimes at full throttle you'll get a nice, steady RPM. Then, out of nowhere, the engine will rev up another 200 RPMs and stay there. Anyone know what causes this?

Still the occassional air bubble in the fuel line, between the regulator and the carb, but I'm not sure what else I could do to seal things off, so I'm not going to worry about it.

kaastrup

Hi

I just got a Saito 150S (Hemi)...Why are there 3 different Saito 150's, and are they different in any way from each other.

Saito 150
Saito 150S (black body-silver cover)
Saito 150SGK (black body golden knight)

jb86

My Feedback: (8)

91 fx should be similar size as the .82 (and more powerful). for my os 70 surpass II (similar size to .82 and 5 ounces heavier) i use the great planes .40-.70 adjustable mount (fits comfortably), swings a 13x6 or 14x4w @ just over 10k, .82 has a little more power. i'd use a simlar mount, but tap 8-32 hardened steel hex head bolts for engine, not sheetmetal screws. i have a .82 i bought a few months back, a few tanks thru it, definitely need to lean ls, vibrates immensely. break in and adjust the carb as a recent post states, before putting it on the plane, or it will vibrate it to pieces.
jon b

gjeffers

Robo, the carb on my 125 on my UCD 60 was about a inch below the tank centerline and i had no real problems with it, it would go a little lean when inverted, never really too much though.with something like that you will never know untill you try it.

if you want to alleviate any problem you can mmount the engine sideways and with the fuel tank an inch above the carb it should come out right about even with it,maybe 1/4 in below still which will be no problem at all

blw

My Feedback: (3)

Great North,

I've used the .72 on a 40 sized mount with no problems.


Hobbsy,

Ok, thanks. I'll lean it the next time I have it on the test stand. I usually waited until around the 40 minute mark on my other engines. Those also showed a real drop in fuel consumption at some point, usually around the 2nd or 3rd tank of fuel, but not this one yet.

I had a RPM increase on the .72 when going from an APC 12x6 to the 13x6 as you did on your .62a.

gjeffers

here is a 100 on a 40 size mount, and im not the only one and no problems.

roboto65

My Feedback: (30)

Thanks for the Info may have to give the sideways route a try if the Inverted gives me a problem
Thanks Again

drdivinity

Sign me up Sigman. I have (2) FA100, a GK100, and a FA220. I also have a question for all of you Saito Experts!! GK runs great until about mid-flight. It still runs but only responds to the lower 50% of stick movement. In other words, on take off and early flight, there's plenty of power!! But about mid-flight power fades to only about 50-75%. Stick movement from center to maximum, produces no increase in power but stick movement from center to minimum decreases power as it should. Any ideas anyone for a solution to this dilema??

SigMan

My Feedback: (21)

drdivinity, i just started this thread, another fellow named Bill Robinson will have to sign you up, he is the guy that picked up the ball and ran with it so to speak along with a bunch of other regular experts on this subject like w8ye, Hobbsy and many others you will quickly come to know who are the regular club pro's on this site. WELCOME ABOARD !

i see you have the saito 220, i havent heard to much said about this engine, how do you like it ? im going to order a engine to put in my christmas present in the next few weeks and the 220 is top 3 in the running...thanks.

Bill is visits the thread about everyday or so, so you should have your number soon. [sm=cool.gif]

Hobbsy

My Feedback: (102)

Doc, I responded to your Saito 1.00 question, we need some more info to make an educated response. Thanks and welcome to Club Saito

Birman

Hi all. I have a new Saito 91 coming and I want to do things right. I'm only on page 90 of the posts at this time. I've noticed on numerous occassions that it is recommend to add castor oil the fuel. My question is this, what castor oil do you use? Is it from a drug store or is there a web site that sells castor oil suitable for glo engines?

Thanks,
Larry (Soon to be Saito owner)

w8ye

My Feedback: (16)

The castor oil made for model engines is usually cheaper but you can use either one