N1EDM

My Feedback: (2)

Nope, a few years ago they moved everything to China... There is still some debate over whether anyone can find any difference between Chinese or Italian-made engines. I think they are still using the same carb design..

Bob

Hobbsy

My Feedback: (102)

G, you'll be interested to know that my Saito .80 and a couple of other engines actually have compression that is too high for Diesel use. When run on Davis Diesel fuel the .80 sound like a Black and Gold grenade if you try to open the throttle beyond 5,000 rpm. There is a device called a Lavona cell that can be used to reduce the compression on my .80 but I don't have one.

NM2K

My Feedback: (14)

So drill out a glow plug one size larger than it is internally, then use a jam nut to create your own compression lower device. How about that, my friend?


Ed Cregger

Hobbsy

My Feedback: (102)

Ed, as Festus used to say on GunSmoke, I been a cypherin on that.

Roary m

My Feedback: (67)

Short reach glow plug to lower comp. perhaps?

critt48

My st90 has not much power on the top end. I've tried adjusting and readjusting the carb to no avail.I want to try a different carb on my st90.Has anyone tried this if so what brand/size is recommended?

NM2K

My Feedback: (14)

If your G90 carburetor is working as it should, another carb will not provide you with anymore rpm without sacrificing fuel draw, etc.

What kind of rpm are you expecting with which prop? There is a Tach Readings forum on RCU. There you will find information regarding others' results with this engine that will tell you what to expect regarding performance.


Ed Cregger

critt48

I haven't tried a tach on it but the idle is ok,midrange is ok but it seems like thats all there is for throttle. The power doesn't improve anymore after about 60% throttle. I have never owned a st before but many people in my club say all st are the same.

NM2K

My Feedback: (14)

ST engines are of an older design. They were designed with different uses in mind than 3D flying.

What this means is that while the carb works fine for ordinary flying of a decade or two ago (once the engine is fully broken-in), it is not going to throttle like a modern day 2-stroke that has been designed and built especially for 3D flying. Nor will it throttle like a four-stroke glow engine, which is far more linear in throttle response than a non 3D designed two-stroke engine.

If you intend to 3D your ST engine, then you might find a serious advantage in switching to a slightly smaller Sanye carburetor for your engine. Yes, an OS carb might be even better, but remember to buy the next size down in total air flow. Doing so will eliminate the problem(s) that you may be having. The basic ST engine (other than individual units with warranty defects) is a terrific engine and will outlast many other engine brands over the years. I dare say that many ST engines that are discarded or abandoned today have been so because the owner was not aware that it takes a considerable bit of running before the ST engine reaches its peak perfection. Trust me, that peak perfection is there for those with patience. Sorry RCU. I didn't mean to curse by saying the word patience. <G>

If all you are hoping to do is just fly around in a sport-like manner (no serious 3D), just leave the engine as it is and fly the dickens out of it. The more running time that the hard metaled ST receives, the better it will run until you will eventually forget about changing the carb. This could take from fifty to one hundred flights. If you can't wait that long, go ahead and replace the carburetor. This will not break it in any faster, but you won't notice the lagging throttle response as much.


Ed Cregger

captinjohn

Get one gallon of FAI fuel and mix it with your 15% fuel. That Supertiger may run better on less nitro (most do). It would be a lot more easy to do instead of messing around with head shims! Capt,n

jeffie8696

I have been doing a lot of engine testing these last few years and I have never gotten my hands on a Super Tigger . Any word on what to expect and anybody have one to trade/borrow for a similar sized (40 something) engine in great shape? I just loves to speriment.

bigedmustafa

My Feedback: (2)

I have a G-61 Ringed I bought new last year, an older Italian-made G-51 with strap on muffler, and an old Italian-made Bull Ring .46 with a sport muffler. All three of my Super Tigres, regardless of Italian or Chinese manufacture, have been great running, easy-to-tune engines.

My new, out-of-the-box experience with the G-61 ringed engine has been as good or better than any other brand I've owned. Not only would I not hesitate to buy another Super Tigre engine, I really can't understand all of the complaints about them that seem to be common folklore.

A G-40 ringed for $59.99 or a G-45 ABC for $74.99 new from Tower Hobbies will tell you everything you'd want to know about new Super Tigre engines. I can't imagine why more folks aren't flying these engines.

lancedoze

Gotta love ST [sm=thumbup.gif] I have two 45's and they are easier to set than my OS engines. @ half the cost.

NM2K

My Feedback: (14)

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What do you have to trade that is worth about $60? A NIB Fox .45 perhaps? I'll send you a NIB (from Tower directly) ST GS-40, if you are so inclined.


Ed Cregger

fabmaster911

Has anybody drilled and tapped a G90 for a pump? If so where did you go in and how well did it work out. Thanks

Hobbsy

My Feedback: (102)

Fab, I put them right in the center of the backplate except for Fox' and they have a boss cast in to top of the backplate just for that purpose.

NM2K

My Feedback: (14)

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It depends upon the mood I am in and where the engine has the most convenient amount of "beef".

If the backplate screw hole/boss isn't vented into the crankcase, or easily made to do so, I drill a hole in the center of the backplate, tap it for the thread of the pressure nipple and install with Loc-Tite. Then, after the Loc-Tite has had a while to set up, I grind any protuberance that is sticking into the crankcase beyond the face of the interior backplate wall. Got that? 8&gt


Ed Cregger

fabmaster911

Got it.

Mikechur01

I have 2 S T and i absolutely love them both exspecially fro the price.
I have a 90 in a Little Toni and that thing flies great. The only problem i have with it is I get some air bubles in the fuel tank which i think is mainly an issue with the plane its self. My other engine is a 45 in a 40size model and it has great torch for 3D flight and i haven't had any problem with adjustment the only thing i have figured out is you will need to adjust the low idle but it isn't that hard.

dannyrsturbo

ive heard its relitivly easy to convert this st s3000 to normal petrol/gas fuel, does anyone have a link to somewhere i can have the conversion done

fabmaster911

[email protected]

captinjohn

I got to agree whit you....go on-board glow...my darn CD ignition quit! If they ever come out with a $25-$30 ignition that does not faill, I may change my mind! Capt,n[:-]

rainedave

My Feedback: (1)

OK, Super Tigre espertos, what is the G20 .23's favorite prop? I know these were popular engines in their day and that there's probably a prop or two that they like best. It seems more like a bored out .19 class engine than a small .25, so I was thinking 8x5 or 8x6. I just received this used example and it has superb compression. I can't wait to run it.

Thanks,
David

NM2K

My Feedback: (14)

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For general sport flying a 16x8 to a 18x8.

I broke-in my G2300 running an 18x8 with the stock muffler, stock glow plug and 5% S&W fuel with 50/50 synth/castor mix. At that time, the pattern boys had become interested in this engine and some were flying it in competition with an 18x8 and resonant exhaust system. My G2300 did not seem to mind the 18x8 right from the start and never displayed signs of struggling with that much prop. A beautiful engine the G2300.


Ed Cregger

rainedave

My Feedback: (1)

Thanks Ed. This is the 0.23 cid, not the 23cc ST. I'll try it with an 8x5 and go from there. It's just that a 9x4 seems a bit big for this engine, but it may do well with it.

David