jcgh

Hi ya all

I'm having big problem with tunnig my S50 engine.

M8s can u help me and tell how is your engine set?
Nr of turns of HIGH , LOW and AIR needles (counter clock.)

Pls i realy need 2 know...the idle seems ok (set a bit fast) but when i speed up and realese the throtle the engine turns off.

2 help your help (lol) here is my current settings of each part:

Settings used:

High> 2+1/2 turns counter clockwise

Low> 6+1/4

Air> a bit less them 1mm, almost 1mm

TKX YA ALL 4 HELP ME !

snowbl!nd

Are the factory settings listed in the manual, if so then try resetting and working from there. The settings others are running will be of limited use to you as a great number of factors (temp, altitude, humidity etc etc) come into play when tuning and these are unlikely to be identical to your conditions.

From the information you've provided it sounds as if both the LSN and HSN are running lean and need to be richened. A video would help immensely

jcgh

Hey m8

Tkx for reply me :P

I'll make a video tomorow, but...can i porst a video here?

Or, for exemple, upload the video to rapidshare and keep the link 2 post here?

The settings of the manual don't help...i've already tryed them but not good resolts.

I'll make the video 2 help U and other m8s 2 help me.

Tkx 4 the quick tip

snowbl!nd

You can certainly post a link to a video here as long as it falls within RCU rules As rapidshare hosts a huge amount of pirated software i'd recommend posting the video on youtube, just to keep on the good side of the mods.

In the meantime what fuel and plug are you using? Has the engine been broken in?

jcgh

I used stock glow plug and 10% fuel as recommended on instructions.

I did what u said (use stock setting from instructions) i i saw a big improve.

At the begining it doesn't even start so i opened the air needle to 1mm.After that it started but went down almost after it starts so i closed a bit the low needle, started it again and it was fine.

When i push the throttle the engine seemed 2 GAG a bit so i've closed a bit of the High needle.After that the car seemed 2 run well. I didn't try it running on a open space so tomorow i'll try it and film if something goes rong.

The corrent setting R:

High>2+1/3 turns couter clock.
Low>6+1/4 turns couter clock.
Air>1mm gap

SycoCell

My Feedback: (3)

I find with my mgt 8 (i've owned 3) that the engine is so big that it craves more nitro. I would suggest trying out 20% atleast. As far as the stalling, try leaning out the HS a tad (clockwise). I would do about 1/8 of a turn. My truck runs well with roughly 1 and 3/4 out on the HS and i'm not sure off the top of my head for the LS. Have you ever adjusted your mid-speed screw as well?

Edit: I should read better, apparently you solved it.

jcgh

I didn't try it running on a open space so today i'll try it and film if something goes rong.

I've used 10% just 4 brake in, now i'm running with 20%.
I've ajust midle screw 2 about 1/4 less then 6+1/2 as recommended on instructions.

I donno if i solved it yet...i hoppe so :S

If i need help or something goes rong i'll reply u and other m8s.

Tkx 4 reply me

Brett001

That sounds like the exact problem i had when i first got mine, I was already using 25% nitro but it had been stood in the sun, got some new fuel and it worked perfect.

jcgh

Ok, have news 4 you.

I've tryed 2 run it on a open space and it was great AT THE START, the problem is OVERHEAT.

Low speed great, high speed as well but midle speed it starts 2 get fat and when i release the throtle the engine turns off.Donno why cuz the low speed was actualy a bit high (the car tryes 2 run a bit on newtral)

Back to OVERHEAT. I gave it more 1/4 and the temperature was not the best but already cooler then it was.

Problems i have:

* Sometimes the engine seem 2 B FAT and other times it looks like it was about 2 do BURNout lol

* When the engine was burnnig like hell the fuel that come into the carb. simply vaporises so the fuel don't reatch the combustion part. Efect: the engine was BEGGING for MORE FUEL, thing that makes some1 think that the low speed is set 2 high, on newtral position.

* The speed Btwin low and high speed is very FAT. If i press full throttle at 1ce, it makes wheelie easy, but if i press 1/2 throttle it makes lot of smoke and turns off

SOME1 PLS HELP ME WITH SOME HINTS T_T

jcgh

pls read my new post at the end of the page tkx

snowbl!nd

Don't worry about the temperature for now.

From your description it sounds as if the LSN is too lean, and the HSN too rich. That would account for the engine cutting out when releasing the throttle, as well as the amount of smoke when you accelerate.

jcgh

pls read my new post tkx

Brett001

The MGT 8.0 always seems to run better slightly rich more fuel should make it run cooler, do as snowbl!nd says and you shouldn't be far off they are temperamental and you constantly have to change the carb for different weather one day it may overheat the next it might run fine, The smoke and cutting out is too much high speed once it wheelies the carb is relying on the high speed needle too much fuel going through the carb sort of floods the engine when you want it to slow down and accelerate again there is too much fuel therefore it smokes or cuts out. Keep richening the low speed and making the high speed leaner do it slowly and one needle at a time until it runs smoothly the idle may need to be adjusted (not much though)

jcgh

TKX bro!!!

I ran it yesterday and it was like this:

While it was cold, the car ran cool, but when it was hot it was always cutting off at low speed.

The idle seems ok but the engine was HOT! Idle wasn't set to high but the temperature of the air that day was 36ºC at shadow and the air was 2 dry!

I think high speed is alredy set lean (2+1/2 turns) and low speed is 6+(1/4)

I know this info don't help mutch but next weekend i'll make a video 2 show u how is it runnig.

As i said, when cold/warm, it runs realy great but when it's HOT the fuel that comes into the carburator vaporises and the fuel don't reach the combustion part. As reaction the car "GAGs"/asks 4 more fuel.
The midle speed is FAT, mutch smoke and the car turns off. If i press full throttle it makes weelies verry easy.

As conclusion the only problems that i have now are:

Temperature-overheat // When it runs cold/warm it's fine
Midle speed-FAT, mutch smoke and the car turns off // Donno why it happens cuz If i press full throttle it makes weelies verry easy then it comes 2 idle speed a bit high doe to overheat cuz the fuel vapurises and don't reach the combustion part


Pls if u have any more hints 4 me pls reply
Tkx bro with ur help i've eliminated the High to low speed problem //the car was turnnig off when it was at high speed to idle speed

MayB the problem is not the car but the environment.
The 8.2 engine hits high temperatures and the environment doesn't help cooling it.
Donno donno and donno [:@]

Well...tkx again 4 helping me [&o]

jcgh

Hi again!

Here is the link to the video i made:

http://www.youtube.com/watch?v=1ifQFEPH168


HD video but with just 1 focus point

pls reply me if u know how 2 help me

Tkx

jcgh

Hi again!

Here is the link to the video i made:

http://www.youtube.com/watch?v=1ifQFEPH168


HD video but with just 1 focus point

pls reply me if u know how 2 help me

Tkx

snowbl!nd

Is that a stocking on your airfiter?

Too rich on the LSN for certain, though the idle speed seems ok. HSN also seems a bit rich also and that may be why it's cutting out when you hit the throttle. Start by leaning out the LSN in small increments (1/8 turn) until is sounds crisp and can idle for around 10 seconds without cutting out. The HSN shouldn't need much work after that, but if you do adjust it you may have to readjust the LSN again a small amount.

jcgh

I've added animated comment there, more important info that should help.
The low speed if low only when the engine is cold, whe it becomes hot the low speed is high (like it needs more fuel...the comment 2 that is in the video)
Pls check the video again with the new info there and u'll see what i mean about low speed (close to the end of the video)
Tkx 4 helping me

brad_lello

Hi I I don't know wether you sorted your stalling problem when you release the throttle. I had the same problem with my S50 out of the box. After a few days of messing with it I removed the air filter and was playing with the throttle/brakes and noticed that when I released the throttle and applied the brakes while looking into the carb that when I applied brakes it was closing the carb a little. I adjusted the accel. brake linkage and this solved the problem. After which I had to go back to factory settings and re-tune the car as I had tried almost everything to get the thing running properly without cutting out.

Hope this helps.