acam37

My Feedback: (16)

This is my very first engine to be converted to gas. It wouldn't have been possible without the help and good advise I got from these forums. Also Hats off to Ken Lambert for the exact fit parts needed to make this a gasser. Most of you know his website, but for those who don't and interested in converting a Supertigre here it is. [link=http://www.lambertsrc.com/]Lambert's RC[/link]

Jester241

Thats REALLY a nice job Acam. I havent been following all your threads,so is that pure gas,or gas/glow or what? I've got a huge super tigre 4500 I was going to covert to gas,but decided to keep it glow for now instead of mess with the needle bearing issue for now. Anyway......looks awesome!

acam37

My Feedback: (16)

Its gas with electronic ignition. I haven't changed the rod over to needle bearings yet. I'm just going to run extra oil and see how it runs like that . After doing some reading it seems that if you run 20% oil there shouldn't be any problems. Later if it seems worth it, then I'll go ahead and send it to Ken for the needle bearing mod. He said it would run me about $75 or so. I already have about $250 invested, so the conversion was not cheap. I just always wanted to do one.

Jester241

Did you ever run the engine in glow form to know what size prop it turned at what rpms? I would be curious to see how much power loss there is going from glow to gas with heavy oil like that. I've considered doing that too. Most guys say you'll be fine with that much oil,but will loose some power.

acam37

My Feedback: (16)

Well I posted over in the glow engine forum about this engine which in a nut shell, I never got it to run because the stock carb was crap. I'm still tuning on it right now so I haven't put a tach on it. I went with a 17X6 and it seems to turn up really nice. I'm going to do a search to find out if a gas conversion runs hotter than glow. It seems really hot after a bench run. Also I'm getting radio interference at 1/4 throttle even with a spektrum RX. Just a few things I need to work on before I put it in the air.

rc34074

My Feedback: (5)

Just to keep things in perspective - as relates to carb problems on engines. I bought a zenoah g26 which i never could get to run. sent it back for service and they sent me a new Walbro carb, which fixed the problem- it now starts and runs fine. so no matter which engine you get you can get a problem carb.

for that matter, I bought a Walbro wt499 and an adaptor and mounted the wt499 on a super tiger 2300. the 2300 runs great on glow fuel with this carb.

this is another option to get a carb that has the pump built in on a great glow engine.

Ed

mangolo

What sparkplug are you using on the G2300.


Waldo
Waco brotherhood #22

captinjohn

Are you running the ST 2300 with a Glow plug or is it spark ignition? My guess it may run good with both types of ignition....using the Walbro wt 499 carb. I also read a 4 cycle glow plug works very well in big Tigers! Capt,n

rc34074

My Feedback: (5)

I am using an OS "F" plug which as you probably know is a 4 stroke plug. I haven't tried it with a spark plug beause it runs very well as is on glow fuel with the wt499, and the cost of conversion is an unnecessary cost. But I do agree that with an ignition system and spark plug the 2300 would run fine on glow fuel.

It probably would also run fine on gasoline but I wonder if the wt499 would tune as easily when running gasoline. I also would expect to have problems with lubrication in the 2300 unless you modify the design to replace some of the bushings in the 2300 with bearings, and you would need to find the right oil type and percentage to add to the gasoline so it doesn't overheat and damage the 2300.

Perhaps Ken Lambert and others would like to comment here about running the 2300 on gasoline. But as for me I think the cost of conversion to gasoline is too high, unless you intend to fly the converted 2300 a LOT! this is because you would have to change to an ingition system and get the bearings modified and mess with the lubrication, etc. Seems like a lot of hassle and cost to me.

The only reason I tried the wt499 is I have been flying a World models 81 inch mustang with a 2300 and it flies very well with this engine. the 2300 is lighter than many gas engines and it turns a 17-8 scimitar prop real well, and flies the mustang as fast as I can handle - probably over 100 mph, although I haven't radared it. But the 2300 runs best on its side with its regular carb so when RCIgnition said the wt499 would handle glow fuel without modification I figured this would let me run the 2300 inverted and thus put the 2300 fully in the mustang cowl. So far it looks like this would work fine. So i plan to mount the 2300 in the mustang, but I haven't gotten that done yet.

Ed

acam37

My Feedback: (16)

This engine is using a 1/4 X 32 spark plug and a walbro WT414 carb. I haven't' checked it out yet, but my radio interference might be caused by the steel table saw I had it sitting on. I was going to crank it in the yard and do a good range check. My ignition is mounted in the nose where the fuel tank usually goes and my AR7000 spektrum RX is in the rear behind the wing which gives me about a foot of separation. The servos were going crazy at about 1/4 to 1/2 throttle then lined out at full throttle.

KenLambert

My Feedback: (107)

Acam
I sent your part this morning.
With the 2.4 you shouldn't have interferance problem unless the plug is broke ( cracked ) and make sure the sheild has a good conection. I had one that had a problem and soldered a seperate strap ground on the cap and bolted it to the engine to solve the problem.

acam37

My Feedback: (16)

I think my carb is bad ( WT414) I tried every tuning trick I could find and still can't get it to run in the air. It tunes great on the ground and as soon as it gets airborne the carb loads up and dies above half throttle. I put a rebuild kit in it and got the needle valve to finally seal, but it just refuses to run in the air. I've got another one I'm going to try to see if it is indeed the carb or maybe just my lack of tuning skills.

rangerfredbob

My Feedback: (13)

on the fuel regulator cover on the carburetor, the one with 4 screws, there's a little hole that gives it a atmospheric reference, if this gets the turbulence that it looks like yours could get some engines have issues in the air. What you can do to help is to solder a brass tube to the hole and put a tube on it and route it inside the fuse, that should help your issue

JIMARRINGTON

Agree with Rangerfredbob.  Sounds like your fuel pressure regulator is getting turbulance.  A common problem with these carbs.  If it runs on the ground it should run in the air.  Only thing that can cause this is the regulator.  It is real easy to solder a 1/8 brass tube in the hole then attach a fuel hose to it and run it into the fuse away from the airflow.  Should fix it.  Another carb will most likely do the same thing.

Jim

captinjohn

Sometimes it is more easy to solder the brass tube to the cover, is to grind the surface a tad around hole and cut the brass tube on a angle where it contacts cover. just a idea! Capt,n

acam37

My Feedback: (16)

I'll try that before I change carbs and see what happens.

KenLambert

My Feedback: (107)

it shouldn't be a problem , the plate is behind the carb on that setup , I haven't had any problems with it on my 2300 but have had some problems with the wt 414 carbs. I have a couple that have done the same thing and replaced them and all was well.

acam37

My Feedback: (16)

Well, I did have an initial problem with the carb. The needle was puring gas and not seating properly. I thought I got it resolved but maybe not. A friend gave me a NIB Tillotson carb. It looks to be a 11MM model HU-64-D. He was going to put it on a zenoha G26, but sold it. It looks identical to a walbro except no choke.

acam37

My Feedback: (16)

I just put on the other carb and did a complete inspection of the fuel system. After removing the tank to check the clunk I discovered that the fuel line was completely off inside the tank.This is why it was dying after take off. No fuel to the carburetor during climb out. I'm going to run the tillotson carb anyway just to see how it does.