RC Specialties

This is the cast model. The Instruction manual shows the same part number for the header pipe and muffler for the 1.20 - 1.80. Are you looking for a muffler?

Jim

rajul

My Feedback: (58)

Hi Jim, I'm working on a new project and need the total weights for comparitive purposes. Horizon did not include the muffler weight in the specs for the 120, 150, and 180. Thanks for the confirmation!

rajul

My Feedback: (58)

Oh yes, maybe I should also ask for the weight of the turboheader?

RC Specialties

Mike,

The 1.50/1.80 TurboHeader weighs 2.5 oz. ready to install.

Jim

ghicken

I am considering putting a Saito 220 on a Giant U can do. I did'nt want to read 240 pages of post so I thought I would just ask and see if anyone has experience with this mototr on the big pink u can do. I am at 4500Ft and everything here has to be much larger than stated by the manufacturer to get any real power for precision aerobatics and good authority out of a hover. Can anyone help?

NM2K

My Feedback: (14)

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Best Regardses...? <G>


Ed Cregger

w8ye

My Feedback: (16)

Only to those that are NIT pickers?

ehillman

I am putting my saito 82 on my Cap 580. i have heard alot of people are reversing the carb in order to have a better throttle lnkage set up and to have the needle facing up with the motor mounted sideways. I like this idea but have never worked with four strokes before. can anyone help me with this?

Hobbsy

My Feedback: (102)

E, just remove the two screws that hold the carb to the backplate, swing the carb out to the side, turn it 180 degrees, swing it back into place and replace the screws. Hold the intake pipe in toward the engine when tightening the screws. It's easy peasy.

ehillman

Thanks Hobbsy, I also am putting the Flex exhaust pipe with the 90 degree so as to not have to cut into the cowl anymore than need be, are there any drawbracks to using the flex pipe and not the muffler. i.e. loss of power? too much noise?

Birman

Problems, problems, problems. As the old saying goes, if it weren't for bad luck, I wouldn't have any luck at all.

I have a new Great Planes 1/4 scale RV-4 that I mounted a Saito 100 on. The Turbo Header hit the cheek on the cowl. I tried the stock muffler and the manifold sticks out too far from the block and also hits the cheek.

Is there a shorter manifold available for the 100? I'll try most anything to keep from cutting into that beautiful cowl.

Larry

scratchonly

I used the old style muffler on my RV3 from my 65 and put the new muffler on my 80 in a jungmeister. The muffler from my 80 ended up on my 65 In a curtiiss hawk. Everything seems to work. The RV3 was a tight fit but I got it in there. Has anyone followed all this?

RC Specialties

Larry,

Can you email me a pic so I can see the problem? We can try to work something out. The next run on the TurboHeader will fit much closer to the engine. The machinist may be able to work some other magic.

Jim

Tony Gag Jr.

My Feedback: (124)

Can I use a 15X8 prop and a 14 oz. fuel tank in a Satio 125? If I can use a 14oz tank what kind of run times should I get? Also, is the Saito 125 the same size as the Saito 100?

Thanks,
Tony

blw

My Feedback: (3)

Yes, you can use a 15x8 on the 1.25. I don't know yet about run times on 14oz, but I'm expecting around 10 minutes on mine as it breaks in. Some of this was answered in the RCV vs Saito 100 thread.

You have 2 other threads started asking these same questions. It is best to stick to just one for the answers you are looking for.

Tony Gag Jr.

My Feedback: (124)

Thanks for the help. I know I asked similair questions on other threads. This one was pretty specific to Saito that is why I asked the question here. I would be very happy with a 10 minute flight with the Saito 125 using a 14oz tank and a 15X8 prop. I was thinking more like a 7-8 minute flight time but 10 minutes sounds alot better.

Thanks,
Tony

znar

I have a 180 in mine and it is great, however I'm only 115 ASL. The 200, you will have to work on the firewall a little to get
get it to fit. You should have a ball with it..

rajul

My Feedback: (58)

I get about 12-13 mins out of my 125 on a 14oz tank with 15% fuel at about half throttle. I set my Tx timer at 10 minutes though.

Bob93447

Missing RPM's recovered

Several months ago I wrote into this forum looking for suggestions to improve the performance of my Saito .72 which had lost 300-400 rpm since I purchased it. I received a number of worthwhile suggestions -- including changing the glow plug, setting the valves, going to new fuel, and checking the intake manifold, all of which I checked to no avail. Because of the number of hours on the engine, >80, several suggested that the bearings should be changed, but inspecting the bearings revealed them to be clean in appearance, smooth in rotation, and tight when exposed to side loads, so I left the bearings untouched. A recent post on this thread indicated removing the muffler on one engine was responsible for improving performance by 500 RPM on the test engine. Since my own muffler is cruded up from the use of 3% castor oil in the mix, it became the immediate suspect. Combined with the fact that peak RPM's were achieved with the high speed needle only about 1 1/4 turns open (vs 2 to 2 1/2 normally) and that the engine (particularly the muffler) was running hot even when adjusted to run 300 to 400 rpm rich, the muffler became the prime suspect. Operation of the engine without the muffler produced immediate and positive results -- peak performance improved by 500-600 rpm and the needle adjustment moved back to the 2 1/2 turns from full open. Furthermore, I weighed the muffler and it appears to have gained weight, roughly 10 to 15%.

Hard numbers -- After about 10 hours operation, and using Powermaster 15% nitro fuel, 80/20 mix of synthetic to castor oil

Prop -- APC 13 x6
Peak RPM --- 10,300 (with muffler)
Flight RPM --- 10.000

After 80 hours of operation, Powermaster 15% fuel
Prop -- APC 13 x6
Peak rpm -- 9800 -9900 (with muffler)

Peak rpm -- 10,500 (muffler removed)

I now have several questions which I will put out for comment

1- Since it would be nice to have the extra power that comes from operation without a muffler (the engine is still relatively quiet), what pump would be best?

2- If I decide to go back to the muffler, what is the best way to clean it?

Once again -- thanks to all of you who contributed your time by way of suggestions. Every little bit of info helps!

Bob -- Club Saito #390

freeonthree

My Feedback: (1)

Maybe sloshing it around in a little bowl of carb cleaner ? And run something thru the pressure nipple too.

RVM

Gonna need more than carb cleaner for the castor varnish. Antifreeze in a crockpot overnight!

freeonthree

My Feedback: (1)

Just fired up the 80 I borrowed from a friend, and it turned only 8100 with a 13x6. Idles and transitions sweet, and idles nicely at 1800. This carb may be for 50,56,65 though. Idle needle is out more than I thought it should have been. My 72 spins a 13x6 much faster. Is this normal, or is it probably the smaller carb we think we may have used. I guess my question is how fast should an 80 spin a Master Airscrew 13x6 ? Oh, no vacume leaks, or tight valves I can find, and it idles smoother than my Chevy pickup.

Hobbsy

My Feedback: (102)

9,500 plus.

w4stp

Hi guy's there are a number of us Amateur Radio (Hams) on here too! And we all love to fly every chance we get!

freeonthree

My Feedback: (1)

Cool, hello from N6UGY !
Im changing the carb and exhaust tonight... This exhaust is alot smaller and restricted than the aluminum one's. I have a proper exhaust, but I need to tap the nipple threads for this larger nipple I have.