If you have oil forcing its way out of the fill tubes and breathers, that is more of an indication that you have excessive crankcase pressure rather than vacuum. Could be the result of excessive blow-by more than anything. This can also explain he smoking if you don't have well sealed oil control rings
@@kevinworks2145 yea that is also a possibility, but the pressure building up in there is a sign. that is unless the cam cover is actually filling up all the way and overflowing out of the caps. Easy enough to test for, just see if there is pressure building up in there or not. If it's filling up then yes, you could be correct and it's not draining. Restricting the oil supply flow is probably ill advised either way.
I know it would be an absolute nightmare to synchronize and tune but individual carbs like an old motorcycle engine would be a really cool modification
Proving once again that 𝗜𝗧𝗕'𝘀 𝗮𝗿𝗲 𝗮 𝘀𝗶𝗰𝗸𝗻𝗲𝘀𝘀 Instead of one monkey on your back it's 4, 6, 8 or 12! "𝙉𝙤𝙣𝙚"... save yourself before it's to late. Cheers from So.Ca.USA 3rd house on the left.
The oily exhaust might just be a result of the engine running in, and by the time you had the second solution in place it had run in more. Might be interesting te reverse the mod and see if the oily smoke comes back. (Because I don't like the idea of reducing oil pressure to the engine...)
Come to think of it, it could be that the flow is too high since it's designed to have a turbo, that would pull a good bit of oil flow from the engine, so with no turbo mounted, it could actually be that it's flooding the head.
@@stevenbmw850 was just thinking the same, if there's not a decent path for the oil to drain back into the sump it wouldn't take much for it to flood the head
one flaw I see is how the radiator is mounted. usually in vehicles, (and water-cooling setups in computers) you want the radiator, or reservoir to be higher than the block. Its so air bubbles dont congregate inside the engine block they congregate in the top of the radiator, or the reservoir. This may be reducing its cooling area, I cant tell if there is a reservoir inside the metal dash thing, but from where you add the coolant by taking off that fitting it doesn't appear so.
If you increase the mass of the flywheel you could have minimum rpm under 2000 You can also develop an electronic rev limiter to make sound more interesting reaching them
The cam belt flex is causing a delay in cam timing. Where one side stretches and causes the delay. A thicker belt will tidy that up. But I'm loving this design. And with no lubrication issues it's begging for a turbo small enough to add some scaled boost. Really would like to see dyno results from that configuration.
If you want to see how a real.250cc 4 cylinder is built, get yourself the engine from a Honda cbr250rr from 1988-92. Absolutely bullet proof reliable 18,000rpm daily commute that live on no maintainance and make 40hp on cheap low octane fuel. Never leak or burn oil
As a quick test grease up the cams and block off the oil supply to the valve cover., if smoke dissapears you know its the guides pulling oil. Tiny orings for valve stem seals on the inlet valves could be possible too.
Would’ve been nice if they engineered some sort of valve stem seals for the price of that thing that us consumers don’t get for free and have to pay out of pocket for but other than that this is probably the coolest engine I’ve seen on this channel to date
This is one of the nicer ones for sure, the oil pump lubricating the head is great. They just need to reduce the pressure like you’ve done. I wonder if the bottom end is splash lubricated or if they managed to get oil pumped into the rod bearings and such
He actually increased pressure by restricting the flow. Like how you make a garden hose shoot water further while reducing total water flow by restricting the nozzle.
Yeah, I saw the turbo setup they had been designing. Would be quite cool if it works. But that's going to need some very precision engineering if it is going to work right, which would make it pretty expensive to make. Dunno, but I guess we'll see. Might still be kind of cool even if it doesn't actually make any boost. On a static engine anyway.
Awesome! Sounds very sport bikey! I vote that you make a four into one header and a Yoshimura type pipe setup! I bet it would sound amazing! If there’s anyone out there who can do it, it’s Johnny!
Hey Johnny! Our team has been working day & night to develop an engine for cheaper prices to allow anyone to get a chance at the hobby! How does this sound 😏 16 cylinders 15,000 to 20,000 rpm 13 Horsepower… Stay tuned!
Tiny turbo you say? You definitely need to test one of those little guys. And I'm not just saying that because I want to put one on a 50cc pit bike. . .
as a tech i would love to own a few of these engines but at the price they sell them i can have a real engine on a stand . maybe one day if i win the loto
Maybe the piston rings need to wear in before they get a good seal! Also did you run the camshafts in? I'm assuming that needs to be done just like you would on a full size engine.....
3:29 - That "Oil Temp" gauge looks like the needle should be mounted in the center like the R.P.M. gauge. How the heck are you supposed to read that? Assuming the needle actually does move.
@JonnyQ90 I love your knowledge of engines, and it's even better when I see you making new "replacement" parts that fit, and work 😅😁. Wishing you and yours all the very best. Cheers.
I can’t help noticing, with all of the engines you show, that the carburettors are always very poor quality. They are either very basic model carburettors or the type used on chain saws and so on. Have considered making your own carburettor? It would be a fascinating series if it was possible for you.
??? Do the pistons have oil rings on the bottom of the piston as oil shouldn't be running into thru the ceats cause it would only blow out and you would have excessive blow by ???
So a question come to mind....with everything at scale, why do you think they idle so high....a normal engine idles about 800 to 1200 rpms...I saw this and most other scale engines idle at about 2500 to 3000 rpms....just curious.....another awesome video, thanks
Scaling down the engine lowers the rotational mass that keeps the engine running at low RPM. This requires a higher idle to stay running. They use heavy flywheels to help some, but it would take a very large one to drop them to full size idle rpms.
This is one engine where the starter motor sound is as good as the engine itself. Very nice specimen
right i thought it was a recording playing like one of those cheap battery operated motors at first
I bet the starter puts out more power too
@@gregorholmes1837 these engines don't have a practical purpose, so it's fine I guess
A specimen is a hearb for cooking bro 😂😂😂
@AduRoper let me use terms bro. A fine spice up for the youtube comment section
If you have oil forcing its way out of the fill tubes and breathers, that is more of an indication that you have excessive crankcase pressure rather than vacuum. Could be the result of excessive blow-by more than anything. This can also explain he smoking if you don't have well sealed oil control rings
I was thinking the oil return would need to opened up if to much oil is sitting on top.
@@kevinworks2145 yea that is also a possibility, but the pressure building up in there is a sign. that is unless the cam cover is actually filling up all the way and overflowing out of the caps. Easy enough to test for, just see if there is pressure building up in there or not. If it's filling up then yes, you could be correct and it's not draining. Restricting the oil supply flow is probably ill advised either way.
Very likely because it uses o rings
+1 for oil drain issues and ring blow by
Make that +2. I wouldn’t advise restricting the oil like that, you could literally be starving the valvetrain of oil.
The garage has got to be immaculate with all of your tools and engines, dream garage 🙏
I mean my garage has all the tools(probably) it’s just finding them that’s the problem lol.
New upload from JohnnyQ90 turns into an even better day. 👍🏻👍🏻😎
I know it would be an absolute nightmare to synchronize and tune but individual carbs like an old motorcycle engine would be a really cool modification
That plus a proper 4-1 exhaust
Proving once again that 𝗜𝗧𝗕'𝘀 𝗮𝗿𝗲 𝗮 𝘀𝗶𝗰𝗸𝗻𝗲𝘀𝘀 Instead of one monkey on your back it's 4, 6, 8 or 12! "𝙉𝙤𝙣𝙚"... save yourself before it's to late. Cheers from So.Ca.USA 3rd house on the left.
U stole my name!
The oily exhaust might just be a result of the engine running in, and by the time you had the second solution in place it had run in more. Might be interesting te reverse the mod and see if the oily smoke comes back. (Because I don't like the idea of reducing oil pressure to the engine...)
It wouldn't reduce oil pressure, the opposite will happen, but it will reduce oil volume/flow which is a big problem. Less cooling and lubrication.
this was to the cam lobes/valves, not the ENTIRE engine..
Yeah if the problem actually is too much flow and not a ring issue, the better solution would be to increase drainage instead of reducing flow.
Come to think of it, it could be that the flow is too high since it's designed to have a turbo, that would pull a good bit of oil flow from the engine, so with no turbo mounted, it could actually be that it's flooding the head.
@@stevenbmw850 was just thinking the same, if there's not a decent path for the oil to drain back into the sump it wouldn't take much for it to flood the head
Absolutely awesome looking and sounding engine! Can't wait to see what you put this one in!
one flaw I see is how the radiator is mounted. usually in vehicles, (and water-cooling setups in computers) you want the radiator, or reservoir to be higher than the block. Its so air bubbles dont congregate inside the engine block they congregate in the top of the radiator, or the reservoir. This may be reducing its cooling area, I cant tell if there is a reservoir inside the metal dash thing, but from where you add the coolant by taking off that fitting it doesn't appear so.
First time I liked the starter sound from one of these scale engines
If you increase the mass of the flywheel you could have minimum rpm under 2000
You can also develop an electronic rev limiter to make sound more interesting reaching them
I love the idling sound, its like a sport bike due to high idle rpms
The cam belt flex is causing a delay in cam timing. Where one side stretches and causes the delay. A thicker belt will tidy that up. But I'm loving this design. And with no lubrication issues it's begging for a turbo small enough to add some scaled boost. Really would like to see dyno results from that configuration.
Always look forward to seeing your videos.
That oil temperature gauge though. Needle at the bottom but markings are radial. China 😁
at least it wasn't me that noticed that crap.
I would love to have this on my lawnmower ❤
Please give us a teardown of this engine. This one looks really good! Actually formidable oil pump, and oil supply to the top end!!
If you want to see how a real.250cc 4 cylinder is built, get yourself the engine from a Honda cbr250rr from 1988-92.
Absolutely bullet proof reliable 18,000rpm daily commute that live on no maintainance and make 40hp on cheap low octane fuel. Never leak or burn oil
If you want them to last they need maintenance like any other engine. Especially valve adjustment...
Right! this toy is a piece of junk!
@@TotoGeenen My Cb700SC I bought new in 1984 had self adjusting hydraulic valves.
All right now I’m not an import guy but now I need vtech great video
That oil pump looks remarkably like the Honda CRF250X I have here on my bench ! No wonder there's good oil pressure 😉
As a quick test grease up the cams and block off the oil supply to the valve cover., if smoke dissapears you know its the guides pulling oil.
Tiny orings for valve stem seals on the inlet valves could be possible too.
I dont need it… I dont need it… I definitely dont need it….. I NEEEED ITTT
I was day dreaming about how to turbo it most the video, then the end said that its in the works.
white smoke is water so it could be headgasket is shot n blue smoke is oils
Its a big one this time , look forward to seeing the results of installing it on the car
I can't wait to see what this motor does into.
Love that they started using straight gasoline, no nitro stuff overhere
Nice looking engine, sounds like it's revving over 9000
I've Never Seen Anything like This Before in my Life, wow
Very nice sound 👍👍👍👍
Old school gauges brings back good times
Would’ve been nice if they engineered some sort of valve stem seals for the price of that thing that us consumers don’t get for free and have to pay out of pocket for but other than that this is probably the coolest engine I’ve seen on this channel to date
Were about to comment "put an turbo on it" when you added there was an turbo kit for it 😂
I like the test platform.
Nice engine stand Johnny. 👍🏻
J'adore le bruit 🥰
That's sick wish I could afford it ❤
This is one of the nicer ones for sure, the oil pump lubricating the head is great. They just need to reduce the pressure like you’ve done. I wonder if the bottom end is splash lubricated or if they managed to get oil pumped into the rod bearings and such
He actually increased pressure by restricting the flow. Like how you make a garden hose shoot water further while reducing total water flow by restricting the nozzle.
@@toolbaggers that's true, the reduced flow would fix the problem then, the head doesn't drain oil fast enough to keep up with the flow rate it seems
This is very beautiful.
Skipped thanksgiving dinner for this
I know nothing about that motor, but it seems like it needs a pressure regulator for the oil pump, outside of a full redesign that is.
Yup, its a worthless toy, this design should not be used for anything you can't fit in your pocket.
We need two cylinters more 🤘
Yeah, I saw the turbo setup they had been designing. Would be quite cool if it works. But that's going to need some very precision engineering if it is going to work right, which would make it pretty expensive to make. Dunno, but I guess we'll see. Might still be kind of cool even if it doesn't actually make any boost. On a static engine anyway.
Put seals on the valves mate. Cut some rings from fuel line.
Nice engine
I have the exact same motor with the same sounding starter😃
*WOW* That engine is Cool!!!
Rvacuate the crankcase a little. You need a slight vacuum even when the rings are attheir leakiest = brand new.
Awesome! Sounds very sport bikey! I vote that you make a four into one header and a Yoshimura type pipe setup! I bet it would sound amazing!
If there’s anyone out there who can do it, it’s Johnny!
Awesome engine. Didn't see a crankcase breather. That may help too.
It's junk.
I'm fans from indonesia, you so cool bro,
masa?😂
I love this channel bro
Dual carbs, and a good 4 into 1 equal length exhaust, please!
Just a matter of time when we see an a/c compressor and condenser tubing to an evaporator coil for a true working a/c as well... 😅
Please do a square body chevy build with this or the hoonitruck 😮
Need to add one of these to a motorized bicycle
That sounds niiiiiice!!
for a moment i thought you had a engine dynamometer, that said you could turn the engine around and fit any one of the number of dynos out there
Hey Johnny!
Our team has been working day & night to develop an engine for cheaper prices to allow anyone to get a chance at the hobby!
How does this sound 😏
16 cylinders
15,000 to 20,000 rpm
13 Horsepower…
Stay tuned!
Needs quad runners, and velocity stacks
Worlds COOLEST vespa engine!!!!!!!!
Would make a great lawn mower engine.
Like the Sound… its Like a motorcycle
This is awesome 👍🏿 Where can you purchase these engines at?
Needs ITBs and a good header.
I need some IPAs and some good head.
Tiny turbo you say? You definitely need to test one of those little guys. And I'm not just saying that because I want to put one on a 50cc pit bike. . .
Now this is a cool engine
Very Cool, reminds me of the Dr Who dog, K9. Does that make me old?
I’d love to see a 125cc version of this
S2000 build would be nice with something like that just an idea it essentially looked like the 2.4l vtec imo lol 😂
as a tech i would love to own a few of these engines but at the price they sell them i can have a real engine on a stand . maybe one day if i win the loto
What about adding some valve seal on valve stem?
Runs much better than the V8.
Maybe the muffler is too restrictive causing excess crankcase pressure and pushing exhaust through the guides
You should find out how much power it makes, do a dyno test!
why does it sound that good
I gotta admit this engine sounds really good but it would be better if it can revs slightly higher.
It would be cool to put this on an electric mountain bike, It would be one quick hybrid if properly done.
An electric mountain bike (like a moped) is already a hybrid...a human/battery hybrid power source.
turbochargers on these small engines are near impossible, they should just do superchargers root style because those for sure would work
Может немного утяжелить маховик? Чтобы холостые немного снизить...
Bro you are fuc&king genius.
Time for ITBs!!!
This motor looks like it would be fast in an RC vehicle of some sort… is that coming?
Probably has no valve stem seals. I'd look into checking that and creating some
What about your dohc V12 engine. Can you please repair it's ignition timing please 🥺🙏🏻
Should verify rpm externally
Hopefully they make an inline 6 version. ❤
Sounds good! Excited to see where this one goes
Maybe the piston rings need to wear in before they get a good seal! Also did you run the camshafts in? I'm assuming that needs to be done just like you would on a full size engine.....
What rings, haha.
@@noanyobiseniss7462 The telephone......? Wanker.
aaah.. dynoracing gauges =D the finest.
see it resetting @2:25 and being sluggish during the whole run
i really miss the analog tech days.
New favorite.
3:29 - That "Oil Temp" gauge looks like the needle should be mounted in the center like the R.P.M. gauge. How the heck are you supposed to read that? Assuming the needle actually does move.
It looks like a flatbed truck so just add a gearbox and suspension. 😜
...If I had such an engine, I would install it in my motorized bike
A homemade CVT transmission next?
@JonnyQ90 I love your knowledge of engines, and it's even better when I see you making new "replacement" parts that fit, and work 😅😁. Wishing you and yours all the very best. Cheers.
I can’t help noticing, with all of the engines you show, that the carburettors are always very poor quality. They are either very basic model carburettors or the type used on chain saws and so on. Have considered making your own carburettor? It would be a fascinating series if it was possible for you.
Needa a full pipe and a homemade n1 style can lol
Throttle response of engine is faster than RPM gauge response
??? Do the pistons have oil rings on the bottom of the piston as oil shouldn't be running into thru the ceats cause it would only blow out and you would have excessive blow by ???
So a question come to mind....with everything at scale, why do you think they idle so high....a normal engine idles about 800 to 1200 rpms...I saw this and most other scale engines idle at about 2500 to 3000 rpms....just curious.....another awesome video, thanks
Scaling down the engine lowers the rotational mass that keeps the engine running at low RPM. This requires a higher idle to stay running. They use heavy flywheels to help some, but it would take a very large one to drop them to full size idle rpms.
@adamr9215 great explanation....Thank you
Physics.