Shubova

My Feedback: (9)

I went to the RC Superstore web site. Their prices are the same as Horizon Hobby http://www.horizonhobby.com/ and Horizon's Product support is excellent. They have gone out of their way to answer any quesiton I have about planes or engines. They have also been very good to me when dealing with returns. If something is missing in a plane they send out the part, if it's in stock, asap
One of our club members and his daughter fly a aerobatic plane (don't remember what it is) with a Saito 180. They had it in the plane over 6 months. I'm not sure what went wrong with it but it blew up. His daughter called Horizon and they returned it without question.
Good Luck,
Shubova
[8D]

Hobbsy

My Feedback: (102)

Thanks Harvey, yep I responded to the wrong guy, sorry.
Also, someone mentioned the velocity stack I made, the current velocity stacks Horizon sells are too small for the 1.25, they have a smaller ID than the carb venturi at full open so I wasted a stock one by drilling the hole in the steel bracket larger and using an appropriatley sized piece of K&S tubing. I have now cut it down to about half the length you see. I worked that out with the help of the late Mr. Robison. Bill said cutting the tubing off at a 45 degree angle would approximate the effect of the bell on the stocker.

krop

My Feedback: (19)

Hi!
I've mountd a SAITO 125 in my new Funtana X100.
The distance from the fuel tank to the carburetor will involve
eight inches of tubing.
What is your opinion regarding the need for a Cline regulator?
Thank you ahead of time.
krop

w8ye

My Feedback: (16)

You are going to have inconsistent engine runs without a Cline

mustaki

hello everyone,
i have decided to open up my saito FA-125 for maintenance and to replace the bearings. it was working perfectly but the bearings became losse and i didnt want the vibrations to increase the tear and wear progress.
unfortunately, i am facing 2 issues now. 1 i couldnt get the aluminum spinner adapter out of the crankshaft - how can i get it done without damaging the surounding parts? 2 i have no idea how to put everything back in place... im talking about the valves timing mechanism...

can anyone share few tips with me on how to get it done properly? a refferal to online manual would be helpful as well..

thank you All.

w8ye

My Feedback: (16)

The aluminum prop driver must be removed with a puller

Timing is set with the dot on the cam pointing straight down with the piston at the top.

Valves at set .1mm to.4mm

The side of the connecting rod bore with the chamfer or taper or radious goes towards the crankshaft.

Small end of the pushrods goes towards the rocker arms

Shubova

My Feedback: (9)

Hobbsy,
What is the difference you see in the velocity stack you got from Horizon and carb opening? The difference couldn’t be that much .
I have two 125’s with velocity stacks and they both run great. I checked the inside diameters of the carb’s and velocity stacks with a micrometer. The carb inside dia. is .3125 on one and the other was .3120 on the other. The v stack inside dia. is .3400 on one and .3898 on the other.

Subtract .312 from .340 and you get .028. the deference between the carb opening and stack opening. To put that in prospective 1/32 = .03125. and that is a difference (.03125-.028) of .003125

Now going back to the .028 smaller dia. of the stack. If you divide that difference .028 by 2 that is .014 a side. Prospective: 1/64 =.0156.
My point is I think your spinning your wheels. Or as they say “Trying to make a silk purse out of a sows ear”.
All a v stack does is direct air into the carb and you control the amount of air that mixes with the fuel when you make your adjustments. Without doing a complicated analysis I would say that difference is just not that important and that’s the point.

That being said…I’m not trying to a put you down. As I always say it’s your nickel you can do what you want. Me I’d rather spend my time keeping my engine in tune, flying and building new planes.
Shubova
[8D]

blw

My Feedback: (3)

I think that someone, maybe Hobbsy, measured a 300 RPM drop with the Saito velocity stack on the 1.25.

Michaelh

My Feedback: (4)

I tell you what 300 rpms on my 18x6 is important! Its the difference between an ok pullout and a HELL YEAH! pull out.

Hobbsy

My Feedback: (102)

I'm in real trouble now, I made one for my old High Compression .80 also.[8D]

beaver180

My Feedback: (10)

Hiya Shubova,

It was me ( oh by the way.... hope I'm allowed to join this Saito club?? as I ownly have a 150s and a 180 and am pretty new to these engines ) that just recently asked about a velocity stack shown on a picture...

Would there be any benefit or disadvantage to me fitted them to my engines ( both are mounted inverted on a 96" DH-2 Beaver and a 1/4 Citabria ) apart from recycling spat out fuel??

Thanks for your help?
Paul

Hobbsy

My Feedback: (102)

Beav, it will also lessen or eliminate the geasy mess inside the cowl.

beaver180

My Feedback: (10)

The mess in the cowl I can live with, as it's all fuel proofed in there and I give it a good wipe out at the end of the day when I post flight check my planes.

The only thing I've read performance wise is a decrease of revs, does anyone have any advantagous performance reasons to go to the trouble??

Thanks for input hobbsy.

CFN, Paul

stallwart

I have put velocity stacks on two Saito 82's, and a 62. Except for the usual differences from one engine to another, I don't notice any difference between my non-VS equipped 82 and 72 and those with stacks................except for much lower fuel consumption. I also seem to get lower sustainable rpm's at idle.

w8ye

My Feedback: (16)

The Golden Knight Saito 100, 115, and 125 do not come with a velocity stack from the factory

However the Saito 50GK velocity will bolt right on the bigger engines. This is the only velocity stack that sait installs on the medium case Saito engines.

What is being talked about here that although the Saito 50 velocity stack will bolt onto the 125 and look perfect - its small size robs the engine of close to 300 rpm on the top end.

ohaley

I have a new Saito .91 and am going to replace the cam gear with a left twin saito 182 cam gear to reverse the rotation. Has anyone ever done this and if so how were the results. Want to put this engine in a D.H.1.

w8ye

My Feedback: (16)

There was a guy that talked about the possibility of doing this on this forum back about four years ago but the best I could figure he had not actually performed the feat himself.

I have a 182 and the exhaust and intake are opposite positions on the left jug.

I'm not so sure the dot on the cam will align correctly for timing?

If it doesn't you can time the cam by centering the overlap period on top dead center by trial and error.

If it doesn't work - you will only be out the price of the cam?

PLEASE give us a report on your experiences

mustaki

geart, now i know, at list, how supposed to be done...
thank you so much...

sodbuster 1

anyone have a part number for a flex exhaust pipe with a pressure tap for a 1.00?
Am a little confused trying to figure it out on Horizons site.
Best I can figure is SAIET74 but it shows as being for a twin.

Is there an aftermarket that works as well with the Saito 90 elbow?

w8ye

My Feedback: (16)

Look in the RCU Marketplace. There is a guy that sells special mufflers and right angle exhaust for Saitos. His right angle works better than the Saito right angle elbow

w8ye

My Feedback: (16)

Flexible exhaust for some of the multiple cylinder engines will fit the 100.

The 182T exhaust will work on the 100.

The 325 -5 cylinder radial exhaust will work on the 100

The 200T exhaust will work on the 100.

The Saito number system Will be SAI followed by the engine model then 74 followed by the design variation

bawls

Valve lash at .1mm and .4mm?
I presume the .4mm is the exhaust valve?
What is the thickness of the supplied feeler gauge? I notice one end is black and the other end is shiny-metal. Is it dissimilar, and one end is thicker? I've not measured it.....

w8ye

My Feedback: (16)

The valve tolerance is .002" to .004" on both valves. Try for .002" if you are that good at it.

Shubova

My Feedback: (9)

beaver180

I try to look at things logically. If it makes since then most likely it true. Hot roders (is that a word) have been using velocity stacks for years. Why do you think they do that…not just for looks. Someone did some R&D and came up with this design. They must have figured out that it gave the engine more performance which results in more horse power…more torque to the wheels and maybe a little more fuel economy.

So if you’re happy with your engines performance without them…okay. If your want more performance then add them. They run from 7 to 15 dollars…that’s not much to pay for better performance, you think?[sm=idea.gif]
Hope this helps!
Shubova
[8D]

Hobbsy

My Feedback: (102)

Bawls, the Saito feeler is .004" the Enya feeler is .002", that's easier to remeber than those little millermeters are.