Large Scale Model V12 (72cc) - Preview 

An rc car with this motor, is a beast.

This sounds absolutely incredible. I would love to see a larger scale car built with this

Thanks JohnnyQ90, the fuel distribution appears to be too rich in the centre cylinders and good to a little too lean in the outer cylinders due to the very different exhaust gas temperatures. This is probably because the full volume of the intake manifolds is less than the full volume of the cylinders before they merge and go to the carburettor. The speed in the intake manifolds is also a key to perfect engine running. At max torque, 83 m/s in relation to the mean piston speed is the key. If the intake manifold is divided into several segments, such as an 83 m/s segment for idling at approx. 800^-1min and one for 1/2 max torque speed, then one for max torque and the total cross-section 83 m/s at maximum speed, and if a whole cylinder fullumen enters this group before they are grouped together to the carburettor, the exhaust gas temperature for all 12 cylinders should only differ by a few ±10°. MpG. EISENEXE Michael Fritjof Mueller

Would love to have this in my room. V12 revving as an morning alarm lmao 😂

Cool stuff. Cant be the only one who misses your old handmade turbines out of tin cans and toy motors

I really like the way that muffler sounds. Great video as always! Doesn't sound right to me as shown by the thermal cam and that fuel comsumption!

A Lamborghini Miura RC car with this engine and one of your well crafted transmissions would be a fabulous piece of engineering. Love your work as always Johnny!

Would love to see someone fit it in a motorbike!

JohnnyQ- the way that fuel drops at idle is surreal

Looks like the only thing left to really catch up on with these small motors is to make them fuel injection now that would be crazy

Amazing Video ! thanks for uploading!! :- )

That sounds absolutely sick!

Man, that thing sure likes its gas, doesn't it?😛 I would imagine a little more base timing and leaning the idle mix out would probably help (after you get a few hours of run time on it).😉 A set of ITB's with injection would probably REALLY wake it up!😄

Love the smoothness of a V12! Looks like it's barely vibrating (looking at the fuel tank).

3:12 Man, that chuffing! I normally only hear that on large-scale V16s, never would’ve expected such a similar tone from such different engines!

This is engineering & craftsmanship at it's finest!

Nice video ! It sounds awesome! It does look like it wants to rev higher though.

that revs up so nicely

Dude, I don't know how you have the disposable income for these toys, but my god you are my hero! I would LOVE to build a RC car to fit this thing!

This is amazing Nice job

Big supercharger required and blow it off ❤

Absolute fire, this is awesome

If you want that screaming sound you need to make an all aluminum exhaust system and include an X-pipe. If it revs high enough it's satisfaction guaranteed

That thing burns fuel faster than my 3L V6 TD :D very cool

yes seems that those 2 cold cylinders are not firing

man that sounds really good too!

Your motors are so beautiful, you are such a cool mechanic 👏👍👍👍👍👍 Good luck 🍀

Yo johnny q whats up with u? Thanks fir all the awesome stuff u make and show us!

This setup in a mini custom kart frame with a fiber body would rock for car shows.

That sound, though. The "smooth buzzsaw" sound of 12 cylinders. 👌👌

Nice 3d printed switch mount! 👍

I owned a v12 jaguar once ,and you could see the fuel gauge going down when you gave it some.Great car,just drank fuel like it was going out of fashion.

you should sell a kit of 3d printed parts pre done wiring harnesses and all that to get from just the engine and radiator and end up with a test bench like that. Include pre cut extruded aluminum, tubing, harness, switches, switch mounts, and everything needed. Idk, but right now it takes so much extra to get an already expensive thing to even work at all that it just isn't very appealing to someone who doesn't have all of the tools to make something like that easily. Great work as always. Maybe instead of a test bench kit you can make a kit to install the v12, v8, i6, i4, or v2 into an rc car with all the hardware necessary to make that happen.

Amazing engineering !

This thing is sick! I would love to see a set of tiny f1 style headers on it! It would probably sound crazy

Lovely sound!

V12 Mercedes project would be great

Good video!

Those headers are soo cool. I think that the problem with uneven temperature might be caused by intake manifold.

Any RC car with this motor would be a total demon machine!!

Now that you have v12 engines in your collection, I think it's time for a 12-into-1 exhaust collector build so we can hear a miniature recreation of the formula 1 wail

This is a big engine!

Hi Guy, this sound won't never be liké an 8 cylinder at idle. I'll Always remember this symphony with m'y dad' F100 , with 4 places in front while we were small kids.🤩🥰☺️😃

This is beast bro

Yes, a New Upload !! 👍👍😎🙂

That thing is huge! I’m waiting for the day when he starts using an engine hoist to move these things around

Beautiful engine! Curious about your background. Are you a hobbyist or a professional?

That was music to my ears... I'm late to the party, but mom wake up! JohnnyQ90 posted a video.

sounds great! now i hope for a good solution to the fuel problem and maybe a diff exhaust and turbo/supercharger?

finaly !!! this is the greatest engine ever

3:44 I love that startup

Please continue the 1/5 RC Car with the v8 engine i really want to see it.

Soon we will be blessed with the choice of two V12s. what a time to be alive 😀

Thing seems like it needs boost great video

Misfire on 2 cylinders from thermo camera

Sounds exactly like a McLaren F1, good stuff

This is the coolest thing !!!!

Good sound 👌

Putting two 3-1 collectors before the main collector will help exhaust flow a lot. Additionally, having 2 carbs will help with fuel distribution since each carb is feeding half the engine, akin to stacked v6 engines. Finally, addressing the inconsistent exhaust manifold temp: that can be caused by fuel mixture or timing issues. Investigate the possibility of late timing in the outer cylinders and rich mixture in the center cylinders.

Nice model, iam really need one to my bicycle.

I'd love to see someone retrofit a pit bike or scooter with something like this!

Its interesting how the sound characteristics of an engine block can still be heard in the mini versions... that Sounds like a V12!

this one sounds so cool

These are very cute and I'd love to have one! I think the carbs on these little are a bit sketchy tho.

This would be wild in an RC speedboat.

That is a thing of beauty. Congratulations, much respect. Absolutely brilliant. Some (constructive criticism) thoughts: 1) Ditch the 3D printed housings - they don't do the rest of the model justice. Either step up to a better quality 3D printing process or fabricate those somehow - machined billet, welded sheet metal, molded plastic... 2) How do you KNOW those cylinders are firing? Given the "one cylinder per flange" design - I'd say they aren't. 3) It boggs on acceleration - I suspect it is running lean or timing could be adjusted. 4) You've got distributors so I assume you have spark plugs - but what is that thing you're disconnecting after start? Reminds me of a glow plug battery..... Don't let anything I've said take away from your achievement. It DOES sound great but I think it can be even smoother.

This would be so sick in a boat!

Waiting for a "Merlin" build in a Spitfire or a Lancaster (4x!) model

please consider experimenting with different exhaust manifold configurations as in Maisteer channel

That's beyond cool. I don't know what you do with it. An R/C car built around it is going to be nearly big enough to require registration, lol. There are street scooters that have less displacement than that thing. Heck, there are juvenile dirt bikes that are only 50 cc's. That thing is a little nuts. But still super cool.

Great videos. Would design a twin carburetor manifold. Bet that would help with mixture in each cylinder

This thing NEEDS a 12-to-1 collector with equal length runners! Please make it happen somehow!

This is excellent 👍 Thermostat if too cool at pump end

I love it!

You know what'd be cool as hell? Putting a mini turbo on one of these mini engines.

I can't wait to see what you do with this one! Should make for a nice power plant. I'd start with some better carbs...A nice cnc'ed custom intake? It needs more volume and a better air/fuel mix distribution for sure.

Put in 1/2 scale car must be sick

Your exhaust setup makes it sound like an Aston Martin V12 at lower revs and a bit like ferrari's V12s at higher revs imo

As these get more and more advanced an ECU would be cool

$3,140 for v12 engine

Looking awesome! Not to sound like safetynick, but carbon monoxide is no joke. Especially with a thirsty motor like this one. It should not be run indoors unless it's sitting next to an open window with a shop fan blowing the exhaust outside.

I would love to see that motor is a big RC Car

Carby needs a tune, it's running extremely rich. Can tell when it runs out of fuel, the RPM speeds up as it leans out.

Now you need a supercharger.

Now that's purrin like a kitten 😂

That would make for a sweet go-cart, maybe with a Lamborghini style body or a Jaguar!

Awesome job mate! I've noticed that most of the miniture engines I've seen and heard run, sound like they are starving for air.

Are there any racing series for RC cars with these engines, the Colney and Toyan v8? There needs to be one.

Damn! That ran out of fuel fast 😀

You blow my mind with these builds!! You must work for NASA or Lockheed Martin… all I know is that your skills are unreal!! Are you in the states?

72cc v12 sound small but compared to your hand 😯

I hate to say, but I think the thermal camera was not lying, I don't think those cylinders are firing. It sounds like it's missing, and a V12 should not sound like a v8. It sounds like it has a misfire, when it should sound like a smooth Ferrari v12.😊

Turn the exhaust the other way round 👊

Damn I like that thermal camera. I was hoping it would be like a $50-$80 item. But $300? Ouch!

Make a truck with this beast

You've got to build a vehicle for that thing JohnnyQ. V12 go kart?

No EFI! No Electronic Ignition!! A Carburetor and 2 Distributors!! AWESOME!! How about 2 or 3 Carbs on that little Monster???

This would make the coolest sounding go-kart ever, even if it didn't have better performance

A built in tach in the stand to show RPM's would be a great addition

Yeah ok... but wheres the A/C? 😂 ...but seriously though, SUPER cool!