People said to me before that RC vehicles use nitro fuel because the geometry of the engines is just too small to have fuel and air mix properly. A flathead is notorious for having bad mixing characteristsics, so I can imagine it being the worst miniature engine to be run on gasoline.
@@printstanza7792 ive been following him since 2016 I’ve never seen it. If you’re talking about the engine type dyno yes, but not a tuning type rolling dyno!
Hi Johnny - you might well have spotted this but on the thermal imaging shot, the exhaust header nearest the camera was cold, and the engine didn't sound like it was running on all 4. Someone else in the comments mentioned something similar. Definately worth looking into. Otherwise, good work!
@@troywarner9546 Sorry to be that guy. Its actually on the same side as the intake manifold. The Intake is on the top while the Exhaust is underneath it as you can see if your not an idiot.
Although I agree with your theory about the stiffer valve springs, I think that a carburetor with a larger bore would also help, with both nitro and gasoline. Compare the ratio of bore diameter of the carb to displacement of a single cylinder to that of one of your factory single cylinder nitro engines.
th-cam.com/video/zXCGyItsgQs/w-d-xo.html i think it could be done, but im sure it would need a compressor or turbo to produce any measureable amount of power
Making such tiny injectors and and an injection pump would be pretty difficult. A flat head wouldn't have enough compression ratio for a diesel either.
Very nice indeed. Considering how big the carburettor is on 3,5ccm and like 4.6 or 5.9ccm, you should definitely get something bigger! This thing is restrictive af. Also one which is not turning. It should slide to the side! Due to the "special" engine use, you should take one with 3 needles to adjust (+1 for idle). Then you should definitely do something with the cam timing. There is basically no "valve crossing", so a point, where both valves are open at the same time, this is mandatory for high revving engines. Without, you will never experience any high rpm things. Especially on NA engines. On Turbos its.. more for cooling EGT rather than getting more air into the engine. I can send you a high performance 3.5ccm carburettor which should fit your needs, but I want to see nice contents with it!
Trying to get it to lower RPM, like 1000-ish will give out more usable RPM range. That way you are still with original parts. Except for the glow plugs ;)
Dennis Radio out of Control swapped the carb with a trx15 but I suggest the SH18 carb it has a bigger venturi and May assist more air flow. Plus is supposed to be easier to tune. Could be a good test experiment. Runs Nicely 👍
I think the gas one sounded better but obviously the nitro is making more power and the throttle response is amazing this is a cool engine curious to see what you’ll put it in
It definitely sounded allot better. When we were kids in the 70's we use to mix 50/50 Cox airplane nitro fuel and gas for are Briggs, or Tecumseh powered go karts, and mini bikes. All the engines back then were flatheads. It didn't help much on the low end, but mid to top end it made the difference. The only thing it ate the electrodes on the spark plugs.
Nice - It definitely sounded better on nitro and looked a lot more responsive than it did running on petrol- I think It'd be a lot better if you give each cylinder it's own carburettor too. It also looks like a prime target for some air charging - Have you ever thought about using a small EDF or driving your own design of super charger with a little brushless motor so it doesn't leach any power/torque from the engine? Good vid as always, Thanks - All the best.
It seems that Johnny has a preference on using nitro over gasoline. Two gas engines converted to run on nitro? Is it that harder for these small engines to run on gasoline than on nitro? I'm sure that the larger ones I've seen in other videos run fine on gas.
Now it needs a two carb setup to mimic hotrodders back in the day. There still are banger 4 cylinder cars that run classes at Bonneville. Build a lakester tribute.
I wonder what gas you were using for it originally. I didn’t think about it until now but if it’s a higher compression it might have needed a higher octane fuel to make it run better
also modyifing the front wheel of the main axel to fit a cooling fan so that way you can use it in a RC car more efficiently with the radiator, also maybe to avoid the cracking of the Carburator pipes, maybe use 1 carburator per 2 pistons or 4 carburators for all 4, would love to see the building process
Really cool engine. Purely from sound though it's definitely not running on all cylinders, maybe issues with fuelling evenly on all 4? Regardless it's nice to see something so well put together and way beyond what I could afford!
Instead of using capscrews to secure the head it would be better in the long run to use studs with Acorn or Dome nuts. Make block stronger, and would look better too. Plus if the head has to come off again its more user friendly.
Maybe I am just seeing things.., but I swear that in the video at the 5:15 part, when the engine is reving up, I see what looks like sparks coming out the exhaust... It doesn't do it on all the revs, but it does on the high revs and when throttling down quickly.....
You do some awesome work. Love the sound of that thing. Quick question though, is there any reason spark plugs wouldn't work for nitro/methanol? Would they not ignite the mixture?
With that running in nitro it will have better cooling too! So your going to be running slightly lower temperatures. Depending on what you run it with you won’t even need the cooler
Sounds to me like it's not running even across the cylinders. A quick look at the inlet manifold design confirms what i suspected. It's not a wet flow manifold. The inner 2 cylinders will be running lean. You could try a new inlet or maybe run it from 4 smaller carbs, but balancing would be a nightmare. Fyi, I've been running engines for 20 years, this is not a guess.
I still say you should put the V-Twin engine on a Motorcycle build, which if IRC would be a first for you. It would looks sick AF on a bagger or chopper. 👍👍
Did u notice that the closest header witch would be no4 cylinder wasn't hot like the rest were glowing start it and check the first cylinder if it don't get hot the carb can't supply enough air/fuel to the end cylinders to solve that twin carbs,so what about doing a twin carb set up for more fine adjustment, and lapping or re-seating the valves coz as u knw thay properly not been done that good in the first place from factory and abit of port matching the inlet see if you can get a better flow and leaving it rough with help mixing the fuel and air, exhaust side help with the flow and give it a little polish to help get the exhaust gases out quicker if it's possible cos of the size. I would make a silencer box with at least a inch of tube each end to put on the end of the manifold for abit of back pressure. If it was me with your tools/machines check if it gets hot thn go from there. I would do the end can/silencer first to see if it helps thn the lapping and port matching/polishing/making flow better in the head and see how if it helps thn the twin carb set up. 🤔💯💯🔥👌👊👍
I must say, it has a lot better throttle response but it does not idle well. I think with tuning the carb for gasoline, the way it should have been, it would run even better! Either way, great video.
@@johnnyq90 They claim 2,5 Hp, which would do it well enough, but I'm always skeptical of the specs for these engines. People make scale engines at home that power planes decently though
Hey Johnny , could you trying making a tesla turbine jet engine? It's a tesla turbine and a axial flow compressor on single shaft, could probably use a centrifugal compressor also.
Seems more like a diesel, than a nitro with the low RPM. Mind you. I wonder if you could get a diesel rc engine. I don't think the engines you have now would work, with a fuel swap as you need high compression too.
I think it would run bette on both petrol and nitro if it had a better intake manifold. The corners look very sharp on the current one and the fuel could be separating from the air here.
Try running the engine on hho gas.. I want to see a dyno compared to nitro and regular petrol. Think it would be interesting on a micro scale and I've seen small generators a mower engines run pretty well on hho alone.
Gasoline compared to Nitro would be the difference between octane ratings . The gasoline would give a modest smoother response but the nitrous a sharper but less smooth response . Also nitrous shortens engine lifespan . Maximum engine speed could be higher with a completely redesigned carburettor system - exhaust system . Increasing timing advance higher in the rpm range , increasing valve lift . A friend has done this kind of research with four cylinder motorcycles .
I'm curious to see how one of these multi cylinder small engines would perform on a string trimmer or chainsaw. I wonder if there is a performance benefit for using multiple cylinders. Plus you could brag about having a V8 chainsaw.
wish working on my cars motor was this easy ..anyone got a shrink ray laying around ..on a side note should add some clamping force to the head with the bigger diameter heads
I think the reason your not running so good on gas is because (like other comments have mentioned) the outer cylinders are not running as rich (Thermals on 1 and 4 exhaust are colder than 2 and 3) and may even be misfiring due to running leaner (Indicated by the glow plugs also being not as hot on the thermals which could be the same scenario for spark plugs) as you may also hear by the sound of the engine. (Doesn't quite sound like running smooth on all 4) If I could know the firing order of this that would be nice, but going off a modern I4 (1,3,4,2) it kind of sounds like (miss,3,4,lean)
![[#2024MAMA] BIGBANG (빅뱅) - 뱅뱅뱅 (BANG BANG BANG) + FANTASTIC BABY | Mnet 241123 방송](http://i.ytimg.com/vi/EQsYfiPR9uM/mqdefault.jpg)
The spark ignition was the best part about that engine. But it does run pretty good on nitro.
yeah kinda sucks it wasnt working well, id like to see it fixed and made to run better with a real rc grade ignition system and not the crap china one
Agreed
People said to me before that RC vehicles use nitro fuel because the geometry of the engines is just too small to have fuel and air mix properly. A flathead is notorious for having bad mixing characteristsics, so I can imagine it being the worst miniature engine to be run on gasoline.
@@RDMracer Nitro has to mix with air too.
@@theyeetus1428 Gasoline spark ignition requires a much more homogeneous air fuel mixture to ignite properly than a compression ignition nitro engine.
You should make a Dyno to bench test your creations before the road! Would love to see that 👋🏼
He did once
He did that already
it's hard to make a ture to scale accurate dyno that works like the real thing
@@printstanza7792 ive been following him since 2016 I’ve never seen it. If you’re talking about the engine type dyno yes, but not a tuning type rolling dyno!
@@rogers8555 theres many videos on here where people build their own dyno for nitro rc’s
Hi Johnny - you might well have spotted this but on the thermal imaging shot, the exhaust header nearest the camera was cold, and the engine didn't sound like it was running on all 4. Someone else in the comments mentioned something similar. Definately worth looking into. Otherwise, good work!
that is the intake manifold, the exhaust was on the other side
@@troywarner9546 Sorry to be that guy. Its actually on the same side as the intake manifold. The Intake is on the top while the Exhaust is underneath it as you can see if your not an idiot.
Yeah it doesn't sound like its running on all cylinders to me too.
th-cam.com/video/Uj9hGpD6kBE/w-d-xo.html
th-cam.com/video/Uj9hGpD6kBE/w-d-xo.html
Although I agree with your theory about the stiffer valve springs, I think that a carburetor with a larger bore would also help, with both nitro and gasoline. Compare the ratio of bore diameter of the carb to displacement of a single cylinder to that of one of your factory single cylinder nitro engines.
th-cam.com/video/Uj9hGpD6kBE/w-d-xo.html
Air:fuel is a commonly overlooked factor when doing diy.
Sounds like an old diesel a bit 🥰
Btw would it be possible to build a diesel at this scale?
I would love to see a mini turbo diesel
1.9 TDI 😛
th-cam.com/video/zXCGyItsgQs/w-d-xo.html i think it could be done, but im sure it would need a compressor or turbo to produce any measureable amount of power
Making such tiny injectors and and an injection pump would be pretty difficult. A flat head wouldn't have enough compression ratio for a diesel either.
th-cam.com/video/E4-fOw6vr34/w-d-xo.html&ab_channel=W7CJ check this out
I noticed the sound difference with running it on nitromethane straight away. Nitro gives it a much more aggressive sound.
th-cam.com/video/Uj9hGpD6kBE/w-d-xo.html
What happens when you make the exhaust pipe longer like a foot or two? I'm curious
Would love to see the sound difference
@@greatestevar wym
th-cam.com/video/Uj9hGpD6kBE/w-d-xo.html
Wow response is right there man I can’t believe nitro makes that much difference it even sound more crisp
LOVE IT JohnnyQ90!!! Switching over to Nitro makes those RPM's climber Soooooo much quicker than running it on gas!!! More air=more power!!!
Very nice indeed.
Considering how big the carburettor is on 3,5ccm and like 4.6 or 5.9ccm,
you should definitely get something bigger! This thing is restrictive af.
Also one which is not turning. It should slide to the side!
Due to the "special" engine use, you should take one with 3 needles to adjust (+1 for idle).
Then you should definitely do something with the cam timing. There is basically no "valve crossing",
so a point, where both valves are open at the same time, this is mandatory for high revving engines.
Without, you will never experience any high rpm things. Especially on NA engines. On Turbos its..
more for cooling EGT rather than getting more air into the engine.
I can send you a high performance 3.5ccm carburettor which should fit your needs,
but I want to see nice contents with it!
Trying to get it to lower RPM, like 1000-ish will give out more usable RPM range. That way you are still with original parts. Except for the glow plugs ;)
Nice to wake up on a Sunday and have one of your vids on stand by lol...keep up the great content 👍
Dennis Radio out of Control swapped the carb with a trx15 but I suggest the SH18 carb it has a bigger venturi and May assist more air flow. Plus is supposed to be easier to tune. Could be a good test experiment. Runs Nicely 👍
I think the gas one sounded better but obviously the nitro is making more power and the throttle response is amazing this is a cool engine curious to see what you’ll put it in
th-cam.com/video/Uj9hGpD6kBE/w-d-xo.html
It does run better on niro, along with the glow plugs. Awesome job as always. Love your channel and content. ❤🇨🇦
th-cam.com/video/Uj9hGpD6kBE/w-d-xo.html
Nitro sounds so 😎 🔥
I would absolutely love to see a miniature turbo diesel
Great vid!! you should totally try to convert one of the engines to a real diesel engine!!
It definitely sounded allot better. When we were kids in the 70's we use to mix 50/50 Cox airplane nitro fuel and gas for are Briggs, or Tecumseh powered go karts, and mini bikes. All the engines back then were flatheads. It didn't help much on the low end, but mid to top end it made the difference. The only thing it ate the electrodes on the spark plugs.
And it now sounds so much better. 🙂👍
As always cool idea cooler results...
LOVE THE SMALL OF NITRO IN THE MORNING!!!
Awesome!! I converted mine to nitro also, revs way better.👍👍👍👍
Nice - It definitely sounded better on nitro and looked a lot more responsive than it did running on petrol- I think It'd be a lot better if you give each cylinder it's own carburettor too. It also looks like a prime target for some air charging - Have you ever thought about using a small EDF or driving your own design of super charger with a little brushless motor so it doesn't leach any power/torque from the engine? Good vid as always, Thanks - All the best.
sounds healthier . Good Show , ENJOYED !!👍👍
You could polish the valve seats to get a better seal when you add the new springs
It seems that Johnny has a preference on using nitro over gasoline. Two gas engines converted to run on nitro?
Is it that harder for these small engines to run on gasoline than on nitro? I'm sure that the larger ones I've seen in other videos run fine on gas.
th-cam.com/video/Uj9hGpD6kBE/w-d-xo.html
I love the way it sounds with nitro. The gas was a bit weedeater-esque, but the nitro sound great.
Комментарий в поддержку канала и ролика, а также труда мастера.
What is the most reliable/ powerful motor you have tested? Would that vtwin take that air pump you made not to long qgo
I'd really love to see a scaled down Dyno to see what power is at the wheels after it's went through the gearbox and diffs
same
th-cam.com/video/Uj9hGpD6kBE/w-d-xo.html
So happy to see a new upload from my favourite TH-camr ❤
Now it needs a two carb setup to mimic hotrodders back in the day.
There still are banger 4 cylinder cars that run classes at Bonneville.
Build a lakester tribute.
Wow! 😲 Two stroke engine 👍
I wonder what gas you were using for it originally. I didn’t think about it until now but if it’s a higher compression it might have needed a higher octane fuel to make it run better
also modyifing the front wheel of the main axel to fit a cooling fan so that way you can use it in a RC car more efficiently with the radiator, also maybe to avoid the cracking of the Carburator pipes, maybe use 1 carburator per 2 pistons or 4 carburators for all 4, would love to see the building process
Love your stuff. Any particular reason you decided to use M3 bolts instead of studding the block?
I seriously want dyno test of the previous video's engine and this one! Nice video Johnny!!
Really cool engine. Purely from sound though it's definitely not running on all cylinders, maybe issues with fuelling evenly on all 4? Regardless it's nice to see something so well put together and way beyond what I could afford!
Instead of using capscrews to secure the head it would be better in the long run to use studs with Acorn or Dome nuts. Make block stronger, and would look better too. Plus if the head has to come off again its more user friendly.
Now ask the company to put two of those together and make a ford flathead v8
Omg that sounds so cool!
15 degrees timing is good to start/idle on, but when you rev it up you'll want more like 30 degrees. That might be a reason for lack of response.
Maybe I am just seeing things.., but I swear that in the video at the 5:15 part, when the engine is reving up, I see what looks like sparks coming out the exhaust... It doesn't do it on all the revs, but it does on the high revs and when throttling down quickly.....
You do some awesome work. Love the sound of that thing.
Quick question though, is there any reason spark plugs wouldn't work for nitro/methanol? Would they not ignite the mixture?
Your very talented, you should make a RC car dragster with your engines.
With that running in nitro it will have better cooling too! So your going to be running slightly lower temperatures. Depending on what you run it with you won’t even need the cooler
Coud you use spark plugs?
Also maybe play around with electronic injection if its possible
Great solution. Simplicity....
Nitro has that lovely crackle idle. Like the TF dragsters have.
It would be so cool to see that in an RC ‘32 Ford.
That was a huge improvement
Stiffer valve springs and lapped valves would be awesome on this little thing
Sounds to me like it's not running even across the cylinders. A quick look at the inlet manifold design confirms what i suspected. It's not a wet flow manifold. The inner 2 cylinders will be running lean. You could try a new inlet or maybe run it from 4 smaller carbs, but balancing would be a nightmare. Fyi, I've been running engines for 20 years, this is not a guess.
How about a big cam v8 with the signature chopping idle?
👏👏👏👏 Braavvooo mantap bin keren mesin mini yang cantik ini luar biasa MANTAP 👍👍👍💖💖💖 untuk bahan bakar nya dari minyak apa??
I still say you should put the V-Twin engine on a Motorcycle build, which if IRC would be a first for you. It would looks sick AF on a bagger or chopper. 👍👍
Can you make a 4 stroke 2 cylinder inline polaris sportsman 850 engine? It would be a really neat and simple build
hey do you think 25% nitro and 30 % nitro could run in a 200cc gas engine mixed with gas ?
Did u notice that the closest header witch would be no4 cylinder wasn't hot like the rest were glowing start it and check the first cylinder if it don't get hot the carb can't supply enough air/fuel to the end cylinders to solve that twin carbs,so what about doing a twin carb set up for more fine adjustment, and lapping or re-seating the valves coz as u knw thay properly not been done that good in the first place from factory and abit of port matching the inlet see if you can get a better flow and leaving it rough with help mixing the fuel and air, exhaust side help with the flow and give it a little polish to help get the exhaust gases out quicker if it's possible cos of the size. I would make a silencer box with at least a inch of tube each end to put on the end of the manifold for abit of back pressure. If it was me with your tools/machines check if it gets hot thn go from there. I would do the end can/silencer first to see if it helps thn the lapping and port matching/polishing/making flow better in the head and see how if it helps thn the twin carb set up. 🤔💯💯🔥👌👊👍
Stiffer valve springs, bigger camshaft lobes and a lightened flywheel would let it rev much higher
Did you lap the valves on this one?
I must say, it has a lot better throttle response but it does not idle well. I think with tuning the carb for gasoline, the way it should have been, it would run even better! Either way, great video.
When you were building this engine did you remember to add the oil rings? I thought they used a o ring for the oil ring
Edit: typo
От новых винтов в голове скоро увидишь на рабочей поверхности гильзы следы.
this was the shortest period between uploads i have ever seen johnny do
Nice throttle response!
Will it spin a 20" propeller at 5000 rpm? Could be a fun engine for a plane.
Not even close to that kind of power, no. I doubt it could spin it at its ilde speed no matter how much nitro fuel one can pour in to it.
It probably would do half that.
@@johnnyq90 They claim 2,5 Hp, which would do it well enough, but I'm always skeptical of the specs for these engines.
People make scale engines at home that power planes decently though
What’s the lowest rpm without stalling, just curious 🧐
Same question here. By the sound of it. I would guess it's in the 1500rpm range.
Hey Johnny , could you trying making a tesla turbine jet engine? It's a tesla turbine and a axial flow compressor on single shaft, could probably use a centrifugal compressor also.
How do you like your seek compact pro? I went w the blackview bv6600 pro and I love that thing
Make a single plane intake for it for it..more plenum space, equal runner length?
Love to see that in a boat!!!
You actually have a thermal imaging app on your phone? That's totally awesome! Is that exclusive to Samsung?
Excellente vidéo 😍😍😍😍😍😍
the genius is back
I would love to see you build a test chassis to try out the different motors on.
Love your content, keep it up!
Down sides are that it becomes very expensive to run, fuel wise & the ignition timing is now down to AFR & nitro percentage i assume.
Seems more like a diesel, than a nitro with the low RPM. Mind you. I wonder if you could get a diesel rc engine. I don't think the engines you have now would work, with a fuel swap as you need high compression too.
So good!!
Like a 2stroke Ehgine!!!
I would love to see you try and do a diesel conversion on an engine like that if its possible but keep up the good work man
Is the flywheel heavy? From my perspective, it looks heavy and it reduce the rpm limit
I think it would run bette on both petrol and nitro if it had a better intake manifold. The corners look very sharp on the current one and the fuel could be separating from the air here.
th-cam.com/video/Uj9hGpD6kBE/w-d-xo.html 1
Try running the engine on hho gas.. I want to see a dyno compared to nitro and regular petrol.
Think it would be interesting on a micro scale and I've seen small generators a mower engines run pretty well on hho alone.
Ok I think you should build 3 more carburettors to get that honda sound plus more power
What's your plan with this engine
curious to see what it could give in an RC car and also see what another exhaust could give
This thing would be badass in a T bucket.
Will you be able to build a 12v generator to charge a car battery with that engine?
I replied on whatsapp
Do you make a v8 rc car? I think it’s very beautiful
Nice 1/5 scale chassis needed for that
Gasoline compared to Nitro would be the difference between octane ratings . The gasoline would give a modest smoother response but the nitrous a sharper but less smooth response . Also nitrous shortens engine lifespan . Maximum engine speed could be higher with a completely redesigned carburettor system - exhaust system . Increasing timing advance higher in the rpm range , increasing valve lift . A friend has done this kind of research with four cylinder motorcycles .
I'm curious to see how one of these multi cylinder small engines would perform on a string trimmer or chainsaw. I wonder if there is a performance benefit for using multiple cylinders. Plus you could brag about having a V8 chainsaw.
It would be soo cool to see a mini diesel
Please find a way to do performance testing an upgrades, maybe a dyno or drag rccar
How do you get the whole starter system to work from your remote?
wish working on my cars motor was this easy ..anyone got a shrink ray laying around ..on a side note should add some clamping force to the head with the bigger diameter heads
I think the reason your not running so good on gas is because (like other comments have mentioned)
the outer cylinders are not running as rich (Thermals on 1 and 4 exhaust are colder than 2 and 3)
and may even be misfiring due to running leaner (Indicated by the glow plugs also being not as hot on the thermals which could be the same scenario for spark plugs)
as you may also hear by the sound of the engine. (Doesn't quite sound like running smooth on all 4)
If I could know the firing order of this that would be nice, but going off a modern I4 (1,3,4,2) it kind of sounds like (miss,3,4,lean)
What was that piece u had hooked up to your phone so u could see the motor temp?