Miniature V12 (50cc) Gets UPGRADED: Electronic Ignition, TUBULAR Exhaust Manifolds & Cooling 

Needs a bigger coolant reservoir to get rid of the air in the system.

I think getting bigger coolant reservoir to get rid of air in the engine and radiator could help. What could also help would be moving the radiator further from the engine so it doest absorb heat from it and it would improve airflow behind the fan. Btw thanks for another amazing video

You should design a 12-1 header system. That thing would absolutely scream with one.

Mecanic here, my first advice would be that the fluid reservoir need to be sealed because pressure is related to boiling temperature so by adding pressure to your system (the water boiling into steam) your boiling temp is gonna rise (water gonna boil at 110~120°c instead of 100) and so your system will be more flexible for high reving for long time or for a smaller fan for your radiator and my second advice would be to purge you coolant system of any air because the air reduce the flow where the water will pass through just by sitting there, just by doing that you should get more water flow in your cooling system and so reduce the fan size and have a more efficient cooling system (you could do that by adding a purge screw where your cooling tube is highest and one on your radiator, also it will help to place the cooling reservoir at the highest point of the cooling system). hope it will help you

Change how your coolant reservoir is connected. It should be used as an expansion tank by being connected with a tee. Having the tank be inline is only causing air to be mixed with the coolant. You can see the air get pulled in when the engine is revved emptying the tank

This is the kind of escalation I want to see

The individual coil plugs are a lovely touch, be nice if it had individual injectors too, a full EFI setup on this would be amazing. Run it with an aftermarket ECU and a heavier flywheel, easily get that idle RPM significantly lower and more top end power :)

your recording quality and your work is amazing bro please keep this up love this

The exhaust was the key for the sound!! Great video Q.

I would love to see you make a dyno for these engines. I know you made a flywheel dyno before, but have you thought of a water pump dyno?

Fantastic video. The way this thing revs is spectacular. The most impressive is how smooth it revs. Really shows how balanced a V12 really is. Can’t wait to see what you do with it next

I'm sure there are lots of comments on how to make more power, but just by looking at how this thing idles, it might be worth making the flywheel heavier so that you can bring down the idle speed without the engine cutting out.

Really cool. Sounds great with the headers. As mentioned by others, bigger coolant reservoir is absolutely needed. There's barely any surge capacity in it for when the revs climb and the exiting coolant sloshes around creating aeration in the reservoir directly over the inlet, getting sucked into the water pump, and then frothed into a milkshake, which then becomes a feedback loop. Also, rad inlet & outlet ports should be on top, will make bleeding and keeping air out of the end tanks easier (thereby increasing cooling capacity by keeping as much coolant in the rad), as well as minimizing chances for air pockets to grow in the end tanks that sit there waiting to get purged when coolant flow increases under high revs (this is probably one of the contributing factors to why the tiny reservoir you have now keeps overflowing; air is being ingested and stored in the system, displacing coolant. So... when is the electronic fuel injection system being installed with ITBs and velocity stacks? You know that's the next logical step now that electronic ignition is done ;) Great videos, love watching!

Do you think the air in the cooling system is negatively affecting the engine temp?

3 things I noticed. 1 you need a bigger coolant reservoir and a baffle to stop it from shooting upwards. 2 the fan size isn't the problem you need a fan that can do pressure not necessarily flow. 3 the exhaust manifolds reduce down way too much, looks like it goes down at the outlet to practically a one cylinder size so it has too much back pressure. Anyways hope it helps, great video, thanks for the hard work!

Just ran into this video from a car magazine (Motor 1) and I don't have the words to express the amount of talent this guy has..... WOW!

Excellent content. As many others have mentioned a closed system and elevating what should be an overflow can might help out. Great work as always. BTW the throttle response is amazing and it sounds like a ripper.

Try pressurizing the coolant system to keep boiling controlled. Build a 15 PSI relief valve that leads from the pressurized portion to the reservoir.

Awesome sounding engine and that throttle response is something else!

So glad ive found your channel, used to love the builds you would post on retrorides so very long ago, so pleased to see you are still as creative, your attention to detail is stunning !!

Sounds amazing. Definitely need to address the coolant reservoir. A swirl tank to help separate the water and air would be good, as well as a taller reservoir. If you could let the coolant build some positive pressure it would help minimize bubbles. Also you can try a product like Redline Water Wetter which may also help. Should only need that and distilled water.

V12 is pretty nice but i'm still waiting for Johny to get his hands on inline 6 especially if it would be dohc. Mini RC Supra would be so cool.

At 22seconds in, I'm already dreaming of that engine on a mini-bike of some sort. Probably a pocket rocket.

Here in Italy the highway code provides that mopeds are two-wheeled vehicles with an engine of less than 48 cc such that there is no requirement for a license to be able to drive them, apart from the age of over 14 (the car license and motorcycles can only be obtained after the age of 18) We are therefore talking about motor vehicles with engines comparable in displacement to your V12 (if I understood correctly, a 50 cc) from my memories, however, the carburettor had a larger air intake hole than that of the V12, in fact usually the carburettor was a "Dell'Orto SHA 14/12" with a 14mm intake duct and 12mm diffuser. it is true that we are comparing a four-stroke V12 with a two-stroke (48cc) but the carburettor of the V12 seems small to me to allow the full power of the V12 to be developed. Another thing I noticed in your video is the presence of bubbles and cavitations in the cooling pipes when you are at high rpm, this brings air into the circuit and therefore could reduce its efficiency, if by chance you have it around the house I would change it also the radiator. Finally, returning to the first sentence of this post, I would like to see the V12 applied to a moped, I think it would provide some nice surprises

brother now u must slap a turbo on there!

Man, it runs so much better with the coil on plug design! I think you may need to set up a pressurized cooling system to really get the most out of it. Too much cavitation otherwise causing the pump not to flow as well. Can't wait to see this in a project car. I wonder if Denny from 'Dennis Dempsey's Out of Control' channel got in on this upgrade? I'll have to check him out and see.... Nice work on the fan stuff!😉 *EDIT:* I saw where Chuan Qi is working on a 4? speed trans and clutch setup for these. He's still working out the bugs, but it looks awesome!😄👍👍

Your work is absolutely incredible, I was speechless and the sound of the engine is wonderful

I love your enginuity, the designs and ideas you implement are awsome, keep it going :)

Why don't you make a big engine

I would love to see one of these hooked up to a dummy load, even a BLDC drone motor with the three leads shorted together would probably work to give it a decent load. In addition, a contra-rotating delta fan would be great for this, 80mm but a lot thicker than a normal case fan, I recommend fan grilles too for your safety ;) I use Delta GFC0812DS's Great documentation of these engines as well as your craftsmanship.

Great work as always. To further improve cooling you could pressurise the circuit to avoid steam in the system with a spring valve on the cap. A bigger expansion vase would help too.

Absolutely amazing! I agree with what some others have said. I don't know much about cooling combustion engines. But I do know for a water cooled computer, air in the loop is a big no, no. A bigger reservoir allowing constant flow of coolant and no air may be beneficial. Awesome video!

Putting this on a scooter or mini bike would be incredible

Would love to see this in a Indy type scale car or a Boat of some type. This is amazing content, keep it up !!!

the throttle response and sound on that thing is nuts....reminds me of 13 years ago when i was discovering the "Modellmotor" miniature 87cc v12 by Ralf Drendel.....only you can buy this one

wish I had the knowledge and tools necessary to create something as masterful as this. This is awesome 👍🏿

Just my opinion but a set of equal length headers would make this thing scream like a formula 1 car.

i would love to see another project get a supercharger in the future :) you think that rpm would drive enough boost through a centrifugal system to be more noticeable than when you last tried one?

Always a treat getting the notification you uploaded. Was worried there for a while!

11:48 You can see that the coolant coming from the radiator is significantly cooler! Good job!!

Top demais 👍🏻👏🏻👏🏻👏🏻👏🏻

Holy crap that thing is responsive. How much power does it make? (if at all possible to measure)

The sound difference once you put the headers on is amazing

Like others have said, the bubbles in the coolant is the main overheating problem. The water pump is losing a lot of efficiency and the heat transfer is severely reduced. A pressurized system would probably improve things too but I would start with the bubbles.

sounds like an Aventador

Its not a fan problem, you don't have a thermostat in the block. the thermostat restricts the flow allowing more time for the coolant in the rad to cool off. what's happening is the coolant is cycling so fast that it doesn't have a chance to dissipate the heat in the radiator so it starts to boil off. Maybe there's a way to do a remote thermostat but that's what's needed if you are intending to do any extended or high rev use.

The sound is addictive. . . love your videos

Nice video I always enjoy watching. Only one thing that I can add as to why the engine is getting hot. Try slowing the water flow down going through the radiator. When I was racing heat was always a big problem, so we kept the fluid in the radiator longer which allowed it to cool and lower the temperature of the engine. I also noticed several comments about how much air was flowing through the hoses, that is a problem itself.

👏🏼 you must have learnt so much about engines doing this, great stuff

Another thing not many people talked about, when designing radiator ducts it's very important to consider flow separation, you want the walls curved and smooth. When 3d printing then, make sure to make a thicker wall and fine sand it.

I like the coil plug setup, that’s some clean work.

Amazing attention to detail!!! Thanks for sharing!!!

mann... i love to read all the comments.. all with professional background giving their own perspective on improving the engine.. it looks like a team discussion.. i'll love to read all the comments on this video hopefully sir soon enough one day you able to build an engine top tier kind of type just with the help of other subscribers.. this channel rocks.. R&D world wide.. keep it up sir

Amazing video! What a beast. Ps ive been watching ur content for a while now and absolutely love it :)

I love what you do man, it's amazing, keep it up, can't wait to see mor RC builds Videos

1:48 your videos are usually so quiet and peaceful. This makes my teeth hurt.

Great video brother!! you covered all the features and upgrades👍👍👍👍

That exhaust manifold is a work of art! It really is a thing of beauty. Awesome work and awesome video 👍

It needs a larger reservoir so it has no chance of pulling in air, and for it to be pressurized to raise the boiling point. But that is freaking cool. It sounds, and basically is a mini F1 engine from back in the v12 days.

The sound after the headers is amazing! 😂 love ittt

The sound with the manifolds on is so good.

Always something good to see here!!

50cc v12 is insane, can't wait to watch the next engine progress.

Great skills. Very cool , good for you to be able to do this . 👏👏👏👏👏

Awesome craftsmanship looks amazing well done 👍🏻 👌🏻

Needed to add more coolant as it idled to fill in the air bubbles. Water cooling radiators arent going to perform all too well if there's too much air entrained into the coolant. Also, bigger reservoir; I would recommend you make one out of metal pipe as a water-cooling reservoir proper (typically made of acetylene or other form of hard plastic) would not last at those temperatures.

Those exhaust headers gave it a mean grumble growl. Fantastic what we can do with 3d printing now.

I CAN NOT WAIT to see what you put this thing in!!!

As someone who does FDM printing, metal 3d printing is so dang amazing.

The throttle response of this little screamer is insane!

How nice that you're using a pc radiator , early watercooling days we pc builders would use car heat exchangers for pc radiators. The circle is complete :D

Just incredible... Congratulations 👍

This is So cute! I really admire your skill as an engineer. WOW!

Awesome ! , it would be really cool to see a cold start in winter, like some are doing with their car! Congratulations for all of your videos, I've been looking a them since the beginning ! 😁🇨🇦

Was cool seeing with the thermal camera the difference between the hot and cool coolant tube

Even the heat shrink on the ring terminals is perfect.

Love NA V12! My Aventador V12 revved beyond 5k rpm exponentially quick to just over 8k rpm (max over 8.5k rpm) screams and howls with powerful sound pressure resonance like an F1 engine. Of course mine is fitted with an aftermarket valved exhaust system and test pipes, tuned ECU too.

Thats best one I've seen so far

you are a very talented machinist

Well done mate another amazing job, sill sume work to do but I know your the man for yhe job. Love your work

with the manifolds it sounds like all the engines from Gran Turismo, absolutely love it.

That sound is amazing!!!

No way n-o way. This is unreal. Just incredible skills. Miniature v 12 ? What ???

I’d like to see this mounted to a custom Road bike with a 6 speed gearbox and decent suspension to accommodate the bumpy roads here in the U.S. I think that would be absolutely inspiring. Amazing work by the way.

That was awesome, thank you for sharing!

Yup I agree rad twice the size also a bigger sump as oil will be cooler also mobile 1 fully synthetic. Great model.

A desktop sized V12 redlining it. Didnt expect it to be so satisfying to listen to.

7:15 Noctua fan! I know that much, lol! I am a PC guy but I love your level of engineering! 😁😁😁

This engine still blows me away. The move from distributor ignition to electronic ignition has really helped smooth it out and get it's response but it's changed the characteristic of the engine a little too, it's more into 80s Group C Jaguar V12 Le Mans car type of engine now :) It's cool that they designed and let you metal print the exhaust manifolds, but I can't help but look at the pipe diameter and think that after combining 6 cylinders together it looks a little bit narrow at the exit. I'm not an exhaust engineer however, that might be deliberate.

the sound is crazy

What fantastic little engine. I would love to see this on a mini dyno tuning for perfection

Veramente un progetto magnifico e fatto in maniera perfetta, veramente un bravo ingegnere meccanico, congratulazioni

In my past race car experience I have found that placing a flow restrictor in the coolant system slows down the speed of the coolant circulation to allow the coolant to remain in the radiator longer therefore cooling better.

Individual coil packs? That's pretty sweet!

Been waiting for something like this

This thing seems to run really well and maybe puts out useable power. Usually the fancy model engines seem to barely run and can't handle throttle without fading.

I agree with all the comments about needing a bigger reservoir for the coolant. You also need a sealed system that can withstand the pressure of the coolant system at operating temps (180°F - 190°F). The air that's trapped and is continuously sucked into the system while you're revving it is creating little pockets of extremely hot air which is in turn passing that heat along to the coolant and so on and so forth. That's a badass little engine though.

That’s really cool as a car guy dealing with this stuff daily

This content is gold 🙌🙌

Dude, this is the engine you need to put in that remote control car project…..🔥