Nitro Engine Tuning Guide Part 3 - How to Tune the High Speed Needle
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- เผยแพร่เมื่อ 14 ม.ค. 2017
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Nitro Engine tuning is probably the most asked question on my Channel, people struggling with their tuning and asking tuning related questions. In this 4 part series, I look at Tuning and adjusting the High Speed Needle, the Low Speed Needle, and the Idle speed screw. Please check out the other three parts of this series and gain a better understanding of how to tune your nitro engine! - ยานยนต์และพาหนะ
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Easy to understand and straight to the point with everything explained from Rich/Lean to how it should sound and react. Amazing, I am new to nitro so this was alotta help. 5 STAR 🌟
Thank you , glad it helped
thanks man. I wish I would of watched this before I leaned out my engine and destroyed it lol.
Sorry for delayed reply! Thanks :) I'm uploading again now.
thanks for this vid brought a secondhand traxxas rustler and was having issues starting it your other video on starting a nitro engine after months of no use also helps as well got it started in about 30 seconds following yours steps.it would run fine when running at slow throttle then stall at full throttle.thought it was too lean but your video showed me it was the opposite.
Ty Ty Ty for these guides!!! One of the best tutorial guides I’ve watched
Your videos are helping me get my Tamiya Mad Spirit buggy tuned and operating properly. I'm fresh to the hobby.
Welcome to the hobby!
best guide on you tube better than the manufacturers videos i have watched thank you for some great info
Awesome video brotha!!! Very helpful!!!
You have a lot of knowledge on Nitro engine. I appreciate the videos. Subbed.
No worries Thanks for watching :)
Helped me out a lot thanks man keep the videos coming
Sorry for delayed reply! Thanks :) I'm uploading again now.
Thank you so mutch, I had a fg marder but I sold it cuz it wasn't all right. Now I'm going to buy a nitro but my only problem was tuning and you just give me trust to tune. Thx
12 years of nitro and I'm still having to watch this guy for pointers
Me.too my 3.3 so much trouble runs good for 10-15 minutes then it wants to bog down when you go full throttle and all but wants to shut off
That's brilliant. Hopefully i can get mine tuned nicely now. Thank you mate i subbed on the previous video.
Sorry for delayed reply! Thanks :) I'm uploading again now.
this small series helped a lot, great videos and thanks a lot.
keep up the good work
Sorry for delayed reply! Thanks :) I'm uploading again now.
@@TheRCBiker no worries man!
Great video one of the best! i understood big time. Thank you!
Sorry for delayed reply! Thanks :) I'm uploading again now.
Awesome!! First instructional video I watched all the way through!! Well, About Nitro carb adjustments anyway LOL!
Sorry for delayed reply! Thanks :) I'm uploading again now.
Nice video man really helpful
Glad it helped :)
A very helpful video. Well done
No worries Thanks for watching :)
Thank you! My Car is running perfect now! :)
Sorry for delayed reply! Thanks :) I'm uploading again now.
I just bought the gbx grx18 engine I’m struggling to tune it I’m hoping tomorrow I can after this ? Can I set both needles to flush and tune it from there ? Should the carb need have much gab on full throttle
This really helped i am new to nitro
Sorry for delayed reply! Thanks :) I'm uploading again now.
Great video. This and the idle one
thanks : )
The 28 Spec 2s is a .28 cubic inch big block engine. Replacing the original Spec 1S, the Axial .28 Spec 2S features a larger machined billet aluminum heat-sink head for increased surface area and cooling, adjusted timing for increased RPM (37,500 vs. 36,000), and a three needle slide carburetor that includes 8.0. 8.5, & 9.0mm venturis. That's the engine.
hell yeah good job kid
woah!
great Video!!!!!!
Thanks :)
very helpful thx
Thank you very much for the gr8 instructions to tuning engine.. but want to ask you another things.. I have a XG -6i radio without receiver.. i want to know what kind of receiver wanto buy I mean any suitable receiver.. thanks
great video, i have a hpi rs4 racer 2 with a yokomo rx. 18 engine that cuts off after a speed run, Any idea? Thank you
Thanks mate!
No worries :)
RB Baker hi great video I just bought myself a ftx torro trophy nitro but have issues with the carb. Then I break it stays open 1mm like you said it should do and when I throttle it open up to far. And when it's sat on standby the carb stays fully open I can't seem to close it up with the screw can you help me please let me know 👍
Hi JT12, i got a 1.8 scale acme attacker running a SH.18 engine. i feel i have got the HSN set pretty good and reaching a good top speed. but my problem is the LSN. ive watched a few vids on this including yours and all been pretty informative. yet my zero to partial throttle response no matter what i do it wont get any better, what do you advise on this
hi mate, i have a teamlosi aftershock and i have been struggling with setting it up i just wanted to know if you had any advice on what to do.
what i start it i have to have the throttle trim set higher but when started i have to trim it down as it at starts to move very slightly, i then start running the truck it feels like i could probably get a better to speed out of it but it still moves very quick but when i take it off the full throttle it still runs arround with out me touching the throttle until i break and then it goes back to idle, just didnt know if it was my idle setting or or the high or low speed needle, help would be much appreciated as I'm really stuck.
Hi I have a Hyper ST and often struggle with tuning. I get it to an OK setting for a couple of outings then I take it out and it seems to develop a a new problem that needs sorting and retuning for. Your tuning vids have tended to help to date but the Current issue is I have good idle and initial low end acceleration and speed but when I open the throttle past half way it cuts out. Can't seem to rectify the problem even if I revert back to stock settings.
Would a black glow plug and a small amount of buildup on the piston be rich or lean.
When tuning I leaned out the engine (turning clockwise) until my car performed well.
I have searched online and there are lots of conflicting ideas.
If my engine is running lean then why would it cause carbon buildup, I would have thought it’s the opposite.
Thak you i am a new commer for nitro cars that helped but i still dont really u derstand yet xan you make more vids
I hold a KE21R engine
so what all are my factory default settings?
say me how many turns should I make on HSN,LSN and Idle screw to bring them back to factory settings?
what is the procedure for it?
Also I have another doubt, whenever I adjust the idle screw needle my carburettor GAP doesn't changes (I noticed that at my opening of air filter area, the gap is still at 0.5mm or more. It does not gets changed when I adjust IDLE SCREW)
WHAT WILL BE THE PROBLEM IN MY ENGINE?
Mine is KE21R KYOSHO ENGINE
BUGGY NAME: Kyosho inferno MP9 TKI3 1/8 Nitro buggy
I need an emergency reply
Hello, great videos that are really informative & helpful. I'm very new to Nitro as I'm trying to get my son into it, he's currently on Lipo RC cars. Question, is it normal for the exhaust to spit unburnt fuel, not a lot just a bit? Noticed some while setting up the tune once the engine was warm. Thanks.
Yes, it's normal, some fuels are very oily (Optifuel, for one) and will spit oil from the exhaust. More than likely the engine might be running a bit on the richer side but if it's running good then no worries. Better to be running too much fuel than not enough!
I know it’s not good to leave fuel in a nitro RC but how long should I leave it in can I leave it for 1-2 days or do I dump it and when I’m gonna put in storage after I remove fuel from tank how do I get it out of engine
What is to hot of a running temp for a jato 3.3 and if it doesn't shut off after you Full Throttle it two passes is that mean that I'm okay and I'm not too lean
A little late but I have a 1/10 scale buggy from redcat racing and I’ve adjusted the idle and high speed needle and it always idles at a really high rpm. Also the drive gear won’t catch and it doesn’t move
You should make a video on tuning the baja!
It doesn't really need much tuning! : )
idk why but I feel like the low speed needle could use some adjustment towards a leaner end as when he thoughtless up you notice it lags a little. Or could be a cold engine maybe
My rc keeps cutting out when I accelerate and take ages to start is the low speed needle to rich or lean
Why is when i start my car with glow start it cuts out once i pull it out? Any ideas...
Hi maybe you can help I struggle to set my rc buggy carb can't get it started
Ok like your vids mate ....
I’m new to nitro 50 year old child .. purchased a very cheap spirit 1.10 buggy from China Have enjoyed keeping it running after crashing numerous times replacing bits here and there ..
Larger wheels ect making super fast ...
My question ... I’ve adjusted setting high and low speed settings many times... atm
From cold tiny little trim on throttle start fast idles .. great off I go .. ( now to be honest we do thrash the cars speed wise ) And suspect the engine is running too hot ... there’s a sensible amount of smoke and engine hugely responsive ..
when I bring the car back it generally would struggle to idle and stall .... restarting if difficult at this point .. where as I need the trim say half throttle for it to start ...
if I allow to cool sensibly ii would restart with just a little trim .. fast idle fine ...
Am I just running the car hard and getting to hot ... or are my running setting still out ??
Cheers in advance ...
My engine is running very hot when idling, is it too lean?
hey bro, i have a nitro kyosho but i cant seem to find out what the factory settings are. not on their website and not in the manual what would you recommend.
What engine is it?
nicely explained, am a beginner and understand the principles of H and L but have the following issue, I put the original settings on both needles but the rpms are so high that the car moves forward at the same time too much smoke comes out, any advice please.
thanks for your video
That is probably the idle speed screw too high : )
Check my videos on Idle speed screw
I have a ftx torro which I think is running very rich. It’s using a lot of fuel and stutters when the trigger is applied.
What can I do to improve this.
Watch the video and find out!
Hi great videos very helpful. Do you run your Nitro engine when tuning without the filter in place as my manual say it’s a No No but if this helps with the tuning then I’m willing to try.
No not usually. If you run it without the filter whilst tuning when you put the air filter back on it will reduce air flow and you'll probably have to change the settings again
TheRCBiker Thanks for answering mate and that makes total sense. This fella hasn’t think I’ll unsubscribe from him obviously can’t be bothered. 👍🏻
@@TheGazman1974 Which Fella? This is my video :)
Please re-subscribe :(
TheRCBiker sorry mate wires crossed 👍🏻😂
When I lean my hsn every 1 hour turn on my 4.6 HPI savage, it idles high when I get into leaner side but it still have good amount of smoke . Do I just loosen the idle screw to lower the idle or richer the hsn abit. Besides I haven't tried these yet. Thanks in advance
Idle should be set to 1mm, also check that the LSN is not too lean
Question my 28 engine starts but when i press the gas it die
i just got car 1.8 will not let me tack the glow stick out will run can you tell me what do next thanks do you think new pug in it thanks jay
Hi Jason, it'll either be a dodgy glow plug or too rich on the low end. Replace glow plug first, and then if that doesn't work lean out the low end half a turn and see if that helps. Make sure you give it a revv with the glow igniter in before anything though, sometimes that's just all they need
Hi there
I have just broken in my Bullet 3.0 and have a problem when applying the throttle the engine doesnt respond until after at least a quarter pull on the trigger. Can you suggest a fix for this?
Many thanks,
Simon
Hi Simon, it sounds like the throttle linkage and servo position need correcting.
-Unscrew the little screw on the top of the throttle servo.
-Set the throttle trim on your radio to centre
-Push the throttle fully closed manually using the throttle linkage, check idle gap is 1.5mm (adjust accordingly with idle screw)
- Replace the Servo horn onto the servo and verify that the idle gap is 1.5mm when the throttle is not being pressed on the radio.
Now, when you pull the trigger, it should open the carb straight away.
Hi jt I have a hsp backwash buggy just finished the break in procedure but every time I brake the engine cuts out and seems to rev high by its self how to I adjust the carb so it doesn't cut out when braking the gap is set to 1mm so I don't understand why she cuts out when brake is applied any help would be great thanks great vids btw!
It's cutting out because the idle screw is set too loose. Remove the Servo horn from the Throttle servo. Push the carb in closed manually, and whilst it's pushed in, tighten your idle screw until the gap is set to 1mm. Then, with it still pushed in, replace the servo horn onto the servo.
At the moment your 1mm idle gap is being held by the servo position, not the idle screw. Therefore when you break it's closing the carb, cutting the engine
JT12's R/C Videos thank you very much I understand that now lol much appreciated keep up the great vids
Hi I have a hpi pulse 4.6 ran 4 tanks of fuel through it when should I start to lean hsn out ?
When you've finished the break in process, start tuning the engine
I have an hpi savage the turns off on me in like 8 minutes after it gets hot. am I running it to rich or to lean?
Watch the video and find out!
Thanks fella ...mine car engine 21 keeps cutting out as soon as started any help
try put it on factory settings and then tune it
I just installed a lrp 21z they recommend using 25 to 30 % nitro but everyone at my local hobby center said it would be ok to break it in using 20% with 14% oil. Now I've followed all the usual break in procedures running 2 tanks at idle then 1/4 turn every following tank . My idle screw is spot on .the pinch test is at about 4 to 5 seconds until stalling so that seems right. But she keeps bogging out once you give it throttle. I did notice it's still spitting oil and smoke so I'm assuming it's still way to rich ? I know all engines are slightly different but my concern is the hsn is almost half way in and it's still blowing smoke and oil and bogging out. should I quit using 20% and switch to 25% or keep leaning it out and see what happens ? I'm sure you get a million of these questions but it's because you are talented in nitro. Thanks again for the videos . Edmund.
If its bogging it could be running lean. Just because it's spitting oil doesn't always mean it's running rich, some nitro fuels have a high oil content and they'll spit fuel whether lean or not. I dont think the fuel percentage will cause it to bog down, try returning the carburetor needles to factory default settings, they might've arrived from the factory messed up!
Fantastic problem solved. You were absolutely correct the hsn to lean. Reset hsn runs like a champ now. I broke it in on 20% vp fuel and plan on switching to 25% how off is the tune ? should I simply reset all screws? Or just fatten up the hsn?
Did u do pt4 video for the low speed needle 😳
I don't think I did, I will add it to my list :) There are older Low Speed needle tuning videos on my channel though.
Yes I did realise this earlier, but it would be cool if you can , you are the best Rc tuber who demonstrates clearly, great channel 👍
Wheres part 4????
Does it need the pipe hooked up to the exhaust
Yes, that's what builds back pressure to force fuel from the tank to the carb
did you make the part 4 low speed?
No, not done yet :( I've got loads of other tuning videos up from previously though.
JT12's R/C Videos thanks I actually found an old lsn one you made in the tuning playlist.
was having issues of an rs4 spitting gas from exhaust got that adjusted now it dies in about 4 seconds after pinching fuel line.
now just need to get hsn gonna watch this a few more times.
about half a tank and the motor head isnt too warm on my palm. its about 40 outside. need a ir gun
I have fuel spots on my tire. not a lot but noticeable. what should I do. I tried to find one of the videos that you mentioned it but for some reason now im looking for it I cant find it. can you or anyone please help. 3/18/17 11:40 am Tx
What do you mean, fuel spots on the tyre?
Yes
man why is impornant to run little rich when is cold out?
And so what would cos the glow plug to burn up
Bad tuning settings usually :)
When I hit my brakes my motor starts to foul. In other words it sounds like it wants to cut off what could that be
Need to turn the idle speed screw slightly clockwise
i have an axial nitro engine and when ever i start it and press on throttle it stalls. Why?
Return your needles back to their factory settings (found in user manual) and follow my tuning tutorials closely. Also check your glow plug is healthy
I start it it revs really hi
Lower your Idle speed screw
If only I could get a right tune on my mac28 since it was second hand I’m having a real hard time
I bought a nitro traxxas stampede of Macari the buy and sell app for $143 with tax and I order a ez start motor and the cable for the motor and glow plug and I order the gears Andover order a low speed needle I think all ready for watching this video my neighbors are going to hate me when I get my nitro rc car up and running because of the nose
what if your t maxx 2.5 stalls and the idle gap is big?
It's probably the tuning settings. When is it stalling? At Idle or during acceleration?
JT12's R/C Videos acceleration
Most likely it's starved of fuel and running lean on the HSN, set your needles back to factory settings and then work from there following this video :)
JT12's R/C Videos okat thanks, I will do it after I replace my stripped carb :) (thought hsn was flushed)
Was a great video series. Wish this one delved in a little deeper on too lean of settings. Definitely the engine quitting was an extreme case. Also, I feel that your idle may be a touch too high, but that's just me, but it may work for you and your driving style. Otherwise, thank you for putting this series together!
Glad you enjoyed it!
Jast tankyou
Sory for spel
My engen dasent start
where's the part 4?
Part 4 is starting the engine for the first time, coming up soon!
When you run your car up and down the streat it sounds like a sirene
It's a great sound :D
Creative Build
your LSN is too rich that's why it doesn't accelerate very quickly. And like you said the HSN could be leaner but it's very cold. I just don't run my more expensive cars like the 8ight in this weather, just stick to the cheaper nitro ones like Kyosha Fazer lol
This was a video about the hsn, not lsn. Lsn tuning video will be up soon :)
www.axialracing.com/products/ax0320-1# This is the link of what the engine looks like. do you know if it's a good engine or is it a waste of money?
1st 2 vidoes are redundant, too much talk no tuning... this one was all that was needed.
We'res your pulls tart
This one runs a drill start :)
The butcher is at it again! The 'good tuning' is actually RICH, and there's ALOT of pre ignition occurring in the engine at high rpm. The 'rich' tuning is ACTUALLY pre-detonation of the fuel mixture, which is causing the crankshaft to spin in the opposite direction to forwards motion. These 1 explosion per cycle engines are to idle very coarsely. There is 1 "bang" note and a long pause of NO SOUND. Then another explosion, followed by a long period of NO SOUND. you guys have these things set as if they're 12 cylinder engines! You're WRONG! The timing of the thing is; "BANG" , no sound, no sound, no sound "BANG", no sound, no sound, no sound, "BANG", etc... Do some research, and listen to the sound of 1 cylinder motor bikes like triumph. Your nitro engine is supposed to have the same sound as those bikes just smaller in size. It's A ROUGH IDLE SOUND ENGINE. It sounds OUT OF BALANCE/ very rough. There's not multiple repeats of explosions per cycle! You DONT HAVE A MULTI-cylinder ENGINE! Lets make that point perfectly clear to all you morons! 1 cylinder means ROUGH IDLE music!
When the car is operating in your 'rich mode' setting, the piston is in upwards motion, is being HIT BY AN EARLY EXPLOSION, and the piston is being forced downwards while it hasn't completed its upwards motion. The crankshaft forces the piston to keep moving upwards and reject the explosion forces pushing it downwards. Your car makes NO speed motion cause the piston doesn't get forced downwards. The explosion has finished by the time the piston reaches the top of the cylinder. Shut up, idiot! And stop making vids!
idk why but I feel like the low speed needle could use some adjustment towards a leaner end as when he thoughtless up you notice it lags a little. Or could be a cold engine maybe