4 stroke to 2 stroke Lada engine conversion

[@kevinhughes5704]

you are correct in your thinking, the problem is the crankcase. i am a 2-stroke motorcycle mechanic and i think the problem is that your engine doesn't have transfer ports to get the mixture from the crankcase to the cylinder. each con rod needs its own sealed chamber with transfer tunnels and ports. hope this gives you something to work with and look forward to seeing it run, keep up the great work and ideas.

[@fenrir4046]

That's not it, because crankcase pressure will never exceed cylinder pressure, wherefore piston rings will retain seal as long as they're in good working order. However, to test this, it could be possible to utilize o-ring piston seals, as Garage54 has done in the past. The configuration will be short-lived, but good enough for demonstration.

[@kwslife116]

The mixture goes straight into the cylinder. They welded the port to the cylinder it doesn't go threw the crankcase

[@wsrepairs7080]

@@fenrir4046 the problem with o-rings will be the port openings, it will most definitely sheer the rubber as the pistons move over them.

[@freakyfreerider]

​@@fenrir4046 wrong.

[@theclubhouse1209]

Not to mention they need 2 stroke type carbs.

[@JHMBB2]

Is this the single most ambitious channel on KZbin? From creating straight 6s out of a 4cylinder, converting a gas to diesel, now a two stroke? This is insane.

[@ludicrous7044]

They explore new frontiers!!

[@GroovesAndLands]

In my opinion - shoulda attempted the Detroit Diesel 2-cycle approach. Keep the intake ports as is - but use the original exhaust valves rather than making ports. This way you don't need to keep the individual cylinders sealed off in the bottom end. However, this approach *does* require a supercharger/blower that can actively push fresh air into the cylinder(s). It'll also require long-skirted pistons that cover the intake ports when piston is @ TDC, else the blower will pressurize the crankcase. Detroits actually have piston rings at the bottom of the skirt, to prevent this. It's worth mentioning that cam speed will need to be 1:1 with crank speed. Nice try, though.

[@joshmanis9860]

They would need a supercharger Detroit diesels cannot run without them they are considered n/a because they need it to run

[@roudyroy1]

agree, much closer to the base design of 4 stroke.

[@GroovesAndLands]

Someone below correctly pointed out that cam would also need to be run 1:1 with crank speed. Even cooler if the cam lobes for the intake were re-done to be in phase with exhaust valves - so instead of half the valves being functional - they'd all be functioning as exhaust valves.

[@bradleytrott6735]

I was going to say the same and we have half decent electric blowers/turobs now but knowing Garage 54 they will already have it or just make it haha

[@GroovesAndLands]

@@joshmanis9860 True enough. EMD710 2-cycles actually have a centrifugal compressor geared to the crank - but arranged with an over-run clutch and a turbine. Thus the engine can be started using the compressor as a "blower" - but once exhaust energy is sufficient - it turns into a giant turbo. Probably the pinnacle of 2-cycle diesel design.

[@willierule3744]

Please do not give up on this. I really want to see you guys. Sorry I really wanna have you guys see this one through. I would love to watch it. Thank you.

[@SkalabalaK6]

I second that :D

[@geofferymaxmax]

I third that XD

[@hardrivethrutown]

I want to see an engine that has cylinders 1 and 3 petrol, and cylinders 2 and 4 diesel... make some strange hybrid engine thing

[@ramirocuentas5999]

They already did it

[@princeru3394]

​@@ramirocuentas5999he meant an engine where in cylinders 1 & 3 runs on typical gasoline, while cylinders 4 & 2 runs on diesel

[@co2addicted788]

That's a sik idea

[@RJLacen]

Yea i like the idea

[@giggiddy]

You'd need different stroke and compression for the different fuels. Not worth the effort for what you'd get.

[@kevinpiper3223]

Mechanic here, with lots of experience with 2 strokes including diesel 2 strokes. You need to introduce forced induction to your engine somehow in order to get the gases moving and allow this to run, you've inspired me don't stop

[@joerolfe7967]

What????? That's completely false. Carburated GAS 2t actually don't tend to run well with forced induction because of bad mixtures and 2ts actually push mixture out of the carb on the down stroke. Therefore the turbo can compromise this system. If the engine was EFI it would be different. However forced induction is NEVER the answer to a non running n/a engine. Forced induction is simply a power adder.

[@kevinpiper3223]

@@joerolfe7967 I appreciate what your saying and I can agree with you, but the idea for forced induction on this particular engines is for the the gases to charge the cylinder. This is why he is unable to start and run the engine. Think 2 strokes principle. Charge gases start off in the crankcase which created the low pressure "draw" then high pressure, think piston moving down pressurizing the air fuel mixture in the case, as the piston goes down power/exhaust stroke/ pressurized crank case air travels into the cylinder scavenging and charging. Ouff that's a lot to explain. Best to watch a video. Anyways in this case look up 2syroke diesel engine operation. Same principle for this application minus ignition type. In his build there is no charge principle built into his engine therefore no air movement, no air fuel mixture so no combustion nor exhaust, therefore cylinder scavenging effects thusly no fun sounds. He needs no other forced induction but a blower, or pro charger. A turbo will not work

[@broughxtreme]

@@kevinpiper3223 Their crackcase volume is too large to create a primary compression. Look at the volume in a 2-stroke, it is mostly filled up with the crankshaft and little air space.

[@petejohnson8397]

​@@broughxtremeI think the other guy is talking about forced scavenging with a supercharger. The intake charge did not travel through the crankcase. 2 stroke Detroit Diesel engines did it this way. Millions were made. EMD locomotive engines used the same method.

[@petejohnson8397]

run it without coolant. use the water jacket as an air box. cut ports into the cylinder walls.

[@anthonybielobockie4991]

Without crankcase pressure forcing fuel + air mix into the cyls, you'll need to add a super charger like they do on the old Detroit Diesels. Two strokes don't "suck" like 4 stroke on the intake stroke, they need a form of forced induction via crankcase pressure or an external blower. You'll get this to run!

[@GroovesAndLands]

There are different types of 2 cycles, and not all require a blower. Take, for example, a typical japanese dirt bike 2-stroke. They are crankcase-inducted, with reed valves, and require no blower. Piston goes up, drawing vacuum on the crankcase - air/fuel is drawn past the reeds and into crankcase. Spark event occurs near TDC, pushing piston down, generating power, and starts to squeeze the air/fuel in the crankcase. That air/fuel mixture passes through the "transfer port", and it begins entering the cylinder just as residual combustion pressure finishes pushing exhaust out the uncovered exhaust port. The fresh air/fuel finalizes the scavenging as the piston changes direction and begins moving upward again. Voila: suck squish bang blow, 2-cycle style without a blower.

[@anthonybielobockie4991]

@@GroovesAndLands that's what I said that you didn't read. The 4 -stroke crankcase isn't going to be conducive to crankcase induction.

[@siraff4461]

@@anthonybielobockie4991 Thats why they tried to seal it with pieces of metal. I don't think they realised just how sealed it needs to be. Leaving open bearings was never going to do it.

[@DanielJohnson-ps4xv]

My thoughts exactly. Get a blower.

[@mondude9754]

They did connect the crankcase chambers into the intake ports of the corresponding cylinders. Seems like a lot of people missed that in the comments but if you watch carefully you can see how they did it. So no blower is needed in this case... Though the chambers weren't sealed good enough so maybe they could benefit by just using the turbo and ditching the crankcase pressure/vacuum setup

[@GHOOGLEMALE]

Great engineering and fabrication - you guys go to enormous lengths to do these projects. Respect!

[@t0m541]

Been watching this channel almost since it started and I'm always amazed at the sheer hard work that's put in to every project, even when it was just Vlad in a tiny lock-up garage

[@mondude9754]

Just putting it out there: many people in the comments didn't notice that these guys DID infact include transfer ports from the crankcase chambers into each cylinder intake

[@battleaxefabandmachine]

You should have done it like Detroit diesel did in their 2 stroke line. Use a blower to feed air and in this case, air and fuel. You would need a longer piston skirt to block off the intake ports while piston is moving up to prevent fuel/air from entering crankcase.

[@hfvhf987]

This was brilliant, i'm really looking forward to part 2 of this. I know you'll get it running eventually.

[@ILOVEBACONBOY2018]

I love this channel no click bait no bs just awesome experiments with talented guys!

[@madmod]

You guys are straight up engineers, or mad scientists. I love it either way!!

[@brettknibbs9351]

Both...

[@robinpage2730]

Keep the factory head, with the valves, but change the timing gear and cam lobes to run a two stroke timing diagram. That is, make it a valved two stroke.

[@joshmanis9860]

They should make it like a Detroit deisel with holes in the bore at the bottom and use the existing valves for exhaust and they would have to use a supercharger

[@siraff4461]

Valves give less flow area, add weight, size, complexity and use power to move with no advantages. There is really no good reason to use them in a 2T.

[@siraff4461]

I should add - valves as found in a 4T engine. There are other kinds which can be of benefit to 2T's.

[@joshmanis9860]

@@siraff4461 then why do Detroit deisel use them

[@shawnsatterlee6035]

Oh yeah ...like a Detroit huh? Wow ur smart and original! 😂

[@coldwarmotors]

I love this project! Please keep at it and make that 2 stroke Lada engine work! All the best from Canada...

[@2coolwheels139]

Even though it didn't really run, you did get it to fire. I think this was one of your best endeavors! It takes quite a bit of knowledge and creativity to accomplish this!

[@boronat1]

just hearing a lada engine 2t sound is enough !

[@2coolwheels139]

@@boronat1 I agree!

[@joshuagibson2520]

But they didn't accomplish anything.

[@gabrielv.4358]

Awesome!!

[@carbineZDH1]

So things to look into! I would definitely reference alot of outboard engines for design ideas. There are many 2-8 cylinder engines displacing up to 4 liters (Mercury Optimax's or Johnson/Evinrude Etec's and older are good examples). It's definitely possible. Suggestions from a guy who's been around these 2 strokes for years. Maybe put a dome to the pistons in a way to help with Scavenging inside the combustion chamber. Look into "Surface fire" spark plugs (NGK BUHW) then you can get the piston really close to the spark plug and help bump up your compression. You are loosing alot of volume Due to the ports so every little bit counts. Another thing: The backs of these 2 stroke crank cases are practically open and covered in Reed Valves. Often times having a small carburetor per cylinder. Maybe try fitting another carb and more Reed valves. Remember you have to have enough fuel and air charge to fill the bottom of an entire crankcase. While also loosing alot of potential fuel charge from Fuel contacting surfaces to be lubricated. Also the crank case definitely needs to be sealed between the two. Any sharing of charge will completely disrupt the charge coming into the crankcase, and being pushed into the combustion chamber. Ignition timing is another huge factor. These engines often idle at 0° BTDC and advance with the throttle up to as much 32°BTDC. Now this one id say 18° area WOT and 0 or even a little After TDC. Like 2 or 3°. If I can think of any other suggestions, I'll definitely update this and hopefully it helps! We Definitely need to see this running.

[@AndyKPOV]

This. I was thinking higher compression a better spark plug and 2 smaller carbs for better mixture. And advanced timing is huge.

[@Dbeattie299]

I really want to see you guys pull this one off anything with a two stroke is so cool to me!

[@i.c.e-addiction]

Exhaust is a major key factor to a 2 stroke. It needs an expansion chamber, this helps keep the air/fuel inside the cylinder.

[@SepticWhelk]

Not real two strokes , ships trucks locomotives .

[@i.c.e-addiction]

@@SepticWhelkah sorry, I thought this was a petrol 2 stroke that they were fitting! You’re probably unaware that the 2 stroke diesel engines that are in ships, locomotives and trucks require a super charger or some sort of forced induction, whereas petrol 2 stroke engines that are running a carburettor, require an expansion chamber in the exhaust, this creates back pressure at the exhaust port to minimise air/fuel escaping out of the cylinder.

[@lucasdiniz5642]

The resonance created in the exhaust of a two-stroke engine is one of the most important parts of its operation, because it does not have valves to maintain compression.

[@Rudy97]

Yes and no, 2 stroke will run with no pipe just fine but at a lower rpm/power.

[@erigabu]

they trying to put some one way valve in 10:17 ... but other problem, on the 2T engine the air direction is verry important. This is a "hard project" this time.

[@JeepinBoon]

Detroit enters chat

[@0123-v1o]

@@JeepinBoon YES. They should have convertet a Diesel to two stroke, with blower and all, and eventually make a one stroke Diesel.

[@GroovesAndLands]

@@JeepinBoon Charles F. Kettering was the man with the 2-cycle diesel vision. Smart dude. The genesis of the 2-cycle Detroits is an interesting story. Check it out.

[@spartanboss4189]

Each cylinder needs its own separate chamber in the crank case for this to work, otherwise the fuel/air mix isn’t going to be forced into the chamber with a shared case. each cylinder also needs a separate transfer port that connects the chamber with the crank case. You can reference the Kawasaki H2 triple to see how multi cylinder 2 strokes are setup

[@pepethefrog7193]

Crankcase compressor wont work because they have no transfer ports.

[@quadbikebuggymechanicuk9001]

Each piston needs its ports too

[@_..-.._..-.._]

Matching cylinders don’t need to be separated, as long as they’re paired they’ll work, but they didn’t have a transfer system

[@EL33BM]

Creo saber porque no se mantiene... intenta poner carburadores independientes a cada cilindro además recuerda que en 2t la mescla ingresará al cilindro desde el cárter al subir el piston genera el vacio en el cárter esto obliga a la mesclar entre al cárter cuando baja el piston"comprime " el cárter haciendo qué traslade la mescla al cilindro.... además debes cubicar la cámara para así saber cuanto cm³ deberá ser tu cárter por cada 100cm³ de cilindro el cárter debe ser 150cm³ aprox doy un loco inventor también saludos

[@JOOLZNED]

Should have built it as a uniflow 2 stroke, use a blower to push the mixture into the cylinders via the inlet ports and cut and rotate the camshaft lobes so both valves act as the exhaust with the cam driven at 1:1 with the crankshaft

[@GroovesAndLands]

I was thinking same - however I forgot that cam would need to be run at crank speed! Great point.

[@joshmanis9860]

So basically a gas powered detroit

[@soulwarrior7721]

Pretty sure they was trying to do something like this.. kzbin.info/www/bejne/kJvElX9ofs6nlas But i think there Fuel mixture is wrong as i see alot of oil coming out. One issue i seen.. The other being the carb being too far form the engine.. The more it bounces and shakes the more air bubbles you put in the fuel lines as it enter the carb.. If it was fuel injection it wouldnt be a issue.. But its not.. Other than that it should work..

[@Rudy97]

@@soulwarrior7721 they had too much crank case volume, intake charge was too weak.

[@claytoncoolidge992]

Yup just like a good old dirty Detroit 2 stroke diesel use exhaust valves and a regular head with an air box setup and ported cylinders with a blower. I also believe that there is a timing issue possibly lack of or too much advance and is why it runs when being pulled but can't support itself

[@nuttyDesignAndFab]

you could try reading the crank pressure using a compression tester. You def need good seals between the inner and outer crank case areas, and if you can LOWER the empty volume in the crankcase that will also help with getting it running; the closer your crankcase is in volume to your piston volume, the better vacuum it'll pull on the intake, and transfer more strongly.

[@chrisparti]

A few suggestions: 1. In a multi-cylinder 2-stroke crankshaft have a labyrinth seal between the main bearings to stop the gases flowing between the individual crankcase chambers. 2. You are correct you need a tight seal between chambers, you will probably need to use thicker plate and then machine the top face and make a gasket. 3. The crankshaft on a 2-stroke has large cylindrical discs that take up a lot of the volume of the crankcase chamber that helps create a higher induction vacuum. 4. The crankcases need to be as tight to the cylindrical crank disks to reduce the volume of the crankcase, as in point 3. 5. Efficient scavenging relies on back pressure in the exhaust, 4 x expansion chambers would be best, but any sort of exhaust would help. 6. Mount the carburettors as close to the intake ports as possible, maybe 4 individual carburettors from a 4 cylinder motorcycle.

[@chrisparti]

@@tobiascat6173 I am 61 years old so my knowledge and ideas are certainly dated 😅But the 2020 KX250 crank has large disc crank and tight crankcase, so does the KTM, so I guess it's still used in competitive scenarios.

[@maxisiamac9247]

i know that making a 2 stroke and history of it and teaching lessons about it is 20 hours video vhs by yamaha companys a women teach it ... yes a woman and this invention plus kips on 2 stroke is yamaha invention and then others got from them so this is near the invention not just changing intake out take exhause cranck case port pressure ... timing it is invention 2 stroke + kips ok ?

[@maxisiamac9247]

no crank case idea made this month on minds by watching diagram of animation of 2 stroke explorer surfer ktm 125 2 stroke 2022 or 2023 cross bike ... improve that 2 stroke is invention not only knowledge that how its worked on a half engine vertically cut difference 4 stroke half engine cut show yamaha told me confidential and secret that 2 stroke and kips is their invention indeed there was not anything at their address just a final fantasy silent place with plants over empty building company

[@lucianlucian1386]

Nice video! I think the main problem here would be the timing. In 2 stroke engines ignition timing is set from 0.4mm BTDC to about 5mm BTDC. In 4 stroke engines I assume that the ignition timing has to do with valves timing. Also în order to worck properly the engine must not have air leaks în crankcase or at The carb jonction. This is why I think în 2 stroke the crankcase is separate from each cylinder. Otherwise the vaccum produced from 2 cylinders will be cancelled by the other 2 comming down. Cheers!

[@JasonLuther1]

You guys are awesome. Cheers from the states. I really want an old Lada to putt around in. Reliable tanks

[@yucannthahvitt]

Two stroke piston rings are often pinned in place to keep them from rotating until the ends catch in the ports, in addition to the other problems

[@crankhandle]

I built a Honda d15a 2 stroke here in nz many years ago, it used a roots supercharger and the crankcase was left standard. I drilled and taped transfer and exhaust ports to accept treaded pipe. It made very good power for a 1500 and sounded amazing!

[@BossGarage]

Hey dude, do you have any videos/photos? IG? I was looking to see if it's too hard to make a 2 stroke D16 and never heard of someone making before your comment!

[@BossGarage]

Hey, are you there? Can you show me something about it? Explain? Thanks ✌✌

[@BossGarage]

Hello? Any news?

[@texsoft8555]

The crank is set as 2 up and 2 down. If it is set more like a sequential crank so that each piston comes up each quarter turn, maybe it work fire better.

[@dannyalyn]

I think you should shorten the distance between the carburetor and intake flaps. You definitely need a exhaust. The sealing in the chambers ia also important,but it might work without doing it. Keep up the good work! Great videos!

[@Skumevil]

Was thinking the exact same. With all that extra room between the carb and the reed valves, you are not getting proper atomization.

[@gmc-roots-blown273]

cut and weld the crankshaft so all pistons are TDC and firing at the same time. Then you won't have to isolate the crankshaft chambers. Got my first cox .049 2 stroke running 40 years ago they are a wonderful thing. You guys rule!

[@BlackPill-pu4vi]

Good grief. I remember the Cox .049 engines! Thanks to lawyers, such toys haven't been sold in decades. The first Cox-powered airplane I got (for Christmas) was a Boeing P-26. The kind that had the two long strings, connected to a handle that controlled the elevator, and you went round and round and round and round with it. You HAD to fly it until it ran out of gas. Those spring starters would NEVER be allowed on any toy today! I imagine a few inexperienced fingers got whacked when it started.

[@shawnsatterlee6035]

Umm no! U obviously don't understand many things!

[@gmc-roots-blown273]

@@BlackPill-pu4vi I had the PT-19 control line, same setup as yours. Yeah that thing took a bite out fingers with its razor sharp prop. Never got to fly it because I couldn't keep it running. Thanks for sharing brother!

[@gmc-roots-blown273]

@@shawnsatterlee6035 Care to explain?

[@ludicrous7044]

Wouldn't that shake your fillings outta ya mouth??

[@ThatDudeTrent1]

2 strokes work by the piston coming down and compressing the mixture in the crankcase. Then when the port opens to the top of the piston the pressure pushes the fuel/air into the cylinder. When the piston goes back up there is a vacuum in the crankcase which pulls fuel and air from the carb back down into the crankcase to start the cycle over again. Just having the intake port straight into the cylinder will not work unfortunately. There is nothing to draw the fuel and air in.

[@michastoute1050]

With a 2 stroke 2 inhale ports and 1 exhaust port. You need also the back pressure from the exchaust to work properly. And a separate are intake will also help. I'm sorry for my bad English because I'm not native speaking / writing in English. Wish you good luck with this project and thanks for all what you already created 😁👍

[@shawnsatterlee6035]

Not really. Needs transfer ports if thinking as a typical 2stroke. Which obviously this isn't for many of reasons. Needs forced induction or will never actually run.... Aka Detroit diesel!

[@Drev222]

It's getting there! watching your previous videos gives me the confidence that you will figure this out. It sounds great when it fires... can't wait to see you guys getting it to run on it's own power. If anyone can do it, You can!

[@gps4l184]

I think you are right, it might need 4 or 2 separate crankcases. Don't give up, please. 😀

[@shawnsatterlee6035]

Won't run way it is even with sealed off per cylinder. No transfer ports. As is,needs forced induction.

[@gps4l184]

@@shawnsatterlee6035 No transfer ports, that was something I over looked, good point.

[@Christopher-kv2ey]

One thing i absolutely love about engines and cars is that it doesnt matter what country your from. We all love them the same and its commen in every country. Great job guys 👍

[@jasonburguess]

You need to mix 2 stroke oil with the fuel so it lubricates and seals the cylinders. Also the ignition timing must be adjusted to fire at the correct time which is at a different point of piston travel with the 2 stroke. 50:1 ratio of oil to gasoline, and make sure to use 2 stroke oil specifically. Hope that helps!

[@speedyme200]

Don't worry about the rod bearings that don't need oil🙄

[@shawnsatterlee6035]

Lmao. The stupid is strong here!

[@valve0radio]

I absolutely Love that you have gone to the effort to put ports into a four stroke block!!! Yes but as others have said similar; the intake ports go UNDER the piston!,,, Then additional transfer duct & ports from crankcase to 'above-piston'!! I Love that you make such elaborate modifications!, I think your separate crankcase departments will be OK! You will need to extend the piston skirt (bottom sleeve) down longer, for it to cover the new intake/ carburettor port, untill piston travel about 15mm before top of stroke (but will the longer pistons hit the crank!?)

[@Simon_r2600]

Im very sure that the timing is wrong! Check the timing!

[@rayr1151]

Great idea. Don't give up. You are so close. I can't wait for the next episode.

[@trevonmendoza4507]

Paint a car 🚗with ballpoint pen ink

[@derkeksinator17]

THE SMELL OF THAT! Interesting tidbit: Before photocopiers there were alcohol/ink copiers that used the same ink as modern ballpoint pens. It came in paper/metal cylinders the size of a toilet roll core. It would be interesting to see if you could still get your hands on bulk quantities of that stuff today.

[@Krishna-Govender]

You have to post your request on the main Russian channel. They don't view the comments on this translated channel.

[@briancoss8482]

​@@derkeksinator17😅😊😅😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊😊

[@joshbyrne3118]

I absolutely love what you're doing here; it's no easy feat. You can do it fellas, and I can't wait to watch (and hear) it run when you do 👍 Fantastic content 👌

[@Quake_Masta]

I really hope they keep working on this, I find it extremely interesting. Also, Doesn't it need an exhaust expansion chamber for proper function?

[@nibbaggggg]

a 2t works without a pipe in low rpm

[@danw1955]

...and custom pistons so it will scavenge. There's quite a bit wrong with the current design that's keeping it from running.😉

[@edvinjohansson9625]

no

[@siraff4461]

No. That may help performance depending on the engine's base design, port heights and so on but it certainly doesn't need one to run effectively.

[@henricksmaximilian]

Same engine twice the ignition cycles. You don't need a smaller motorcycle carb, you need a bigger carb. You have spark and timing, but you don't have proper compression. Intake and exhaust have reed valves that allow one way travel. Intake into the cylinder excuse out. Also, if i remember correctly from my dirt bike days, the rings are on the bottom of the piston and the rings don't go past the reed valves. Two stroke motorcycle engines use the crankcase as pump for air fuel oil mixture out of carb and into cylinder. I figured you would increase the tooth count of the cam to match 1:1 rotation with crank, weld the intake valves or convert to exhaust, double timing, get it to run with a creative intake addition to push the exhaust out as the piston rises to tdc. I am equal parts surprised and impressed that you completely reinvented the wheel with this one. Good luck with this one, i am rooting for ya.

[@riz3nfpv306]

Don’t two strokes- need finely tuned exhausts to scavenge ?

[@ruubjumper126]

no, but it would be better for power

[@lucasdiniz5642]

yes, the resonance created in the exhaust is important to maintain compression

[@jojohnson215]

I love this kind of high-tech shade tree mechanics. I am waiting for the robot cantina to release his new vid tomorrow and might have found my new favorite channel here. Thanks for the video guys. Keep up the great work and God bless.

[@davidbachmann8078]

at 5:22 you can see the problem why the engine refused to start. the piston in the right cylinder opens the exhaust port below the piston so fresh mixture can escape directly out of the engine without making it into the combustion chamber. this is why most two stroke engines have longer pistons to block the exhaust ports when the piston is more towards tdc. there are two options for solving this problem. one is to make the exhaust ports wider but not as tall/not as far down the cylinder. second option is to make new taller pistons that block the exhaust ports when the piston is at tdc. great project though and i really would like to see you guys get this thing running

[@fremenondesand3896]

I know nothing practical on engineering, sorry. I just wanted you guys to know I'm hoping there's a part 2 on this, good luck with your 2 stroke engine!

[@CarsandCats]

Port timing is critical. You need an adjustable plate that you can move up and down until you find the sweet spot. Also, and expansion chamber exhaust is needed for EACH cylinder. This helps pull the mixture through the cylinders.

[@EpsilonHunters]

You'll need a compressor and a valve for exaust to make it work properly, cause in 2 strokes the mix gaz/air is compressed by the down engine, and then injected into cylinders at he GOOD time...

[@scottyfixit]

Like the Detroit diesel, you may greatly benefit from a positive airflow intake instead of a negative one to pull fuel and air in. Also, treat it like a V8. Twice the amount of air and fuel is needed compared to a 4-stroke since it’s firing every rotation instead of every other rotation, but you also get twice the power strokes too for the same sized engine.

[@Messudraci]

I've worked with 2 stroke engines for over 2 years now and rebuilt a couple engines. You need to have the intake port lower than the exhaust port for it to create good pressure. Also try a real 2 stroke carburator. Pwk. Phbg etc and give every cylinder their own carburator. This is to give the right amount of fuel for every cylinder to fire correctly. As it is it distributes the fuel unevenly causing it not to run.

[@leakyspaceboots7542]

It's mind blowing what you guys pull off with basic machines

[@02f4irider]

I feel like the 3 intake tubes to 4 cylinders has something to do with it. The middle 2 feed off 1 tube which want to fire but 1 & 4 are on their own large port. If cylinder 1 & 2 was on one intake tube and 3 & 4 on a separate intake tube that it would effectively equal out and have the proper air/fuel mixture since one would be on exhaust stroke and the other on intake stroke. I cant wait to see the next video on this!

[@Hydrogenblonde]

What you need to do is make up another block and this time leave the crankcase alone, leave it full of oil as it usually is. Then fit a compressor (crankshaft driven supercharger) to the inlet to force the air and fuel into the cylinders instead of using crankcase pressure like you have done here. Also the inlet ports need to be angled upwards pointing towards the sparkplug and opening at about 1/2 way through the exhaust port opening. Good luck.i love your experiments.

[@chrisgleis4297]

Primary crank case pressure needs to be high by having a tight fitting oil pan and separate from the other cylinders.each rod journal should have its own main journal

[@venox5183]

As a car vehicle technician from degree and a dirt bike mechanic as my job in free from school time i can say that the whole idea and execution is great, except one teeny tiny detail. Crankcase should be divided to 4 compartments, and every of them should be sealed. However you would need to cut cranksaft and make it press fit together. Also you could modify big end and drill holes for oil and crossing lines for lubrication. I'd love to see a lada with correct expansion chambers and tuned well so it has a really nice power band. Edit: The problem why it isn't working is the crankcase. Because it isn't sealed it does not make high enough pressure to move air/fuel mixture from carb to cylinder, because of 2 stroke compression being much lower than 4 stroke and it just doesn't get enough air and fuel. You can bypass it actually by putting a electric 12v turbo charger between intake and carburetor or a ton of work with crankshaft and crankcase. By the way you could grind very wide holes in counter weights and weld a piece of sheet to lower the weight of crank but keep the volume the same which will maintain good pressure. If you want to pull it off it will take a looong time and it will be many ups with much more downs before you get it to run

[@inglbrute]

That's what i was thinking, no cc pressure forcing the fuel into the cylinder. Maybe some forced induction? Coolest project I've seen in a long time. I wish i could come visit your shop and mess around.

[@artemovili]

It looks like they combined the crankcase and the scavenging port into one continuous port with the square tube. I bet that’s why it won’t really run. Adding reed valves helped because it eliminated the blow back up to the carb from the crankcase on piston downstroke, but the direction of air fuel mixture needs to make a complete 180 direction change as it enters the crankcase from the carb intake runner, then go back out again up the crossover tube to the intake port. That prevents the mixture from being able to gain any momentum.

[@jarrettp9715]

Very cool. In the early 2000s some American guys converted an air cooled VW motor to 2 stroke. Instead of sealing the bottom end it was more like a Detroit diesel I think, it relied on a roots blower to run. There was a video of it making a pass on the drag strip on streetfire but unfortunately that is lost to time

[@jasonpeace1991]

Your problem is the intake You need to force air into the cylinders Traditional 2 strokes use reed valves the air is drawn into the crankcase as the piston goes up then the valve closes and as the piston decends the air is forced through transfer ports into the cylinders And easier alternative is to supercharge it

[@Jack-ct7gg]

From what I could see you didn’t have the mixture go to the crankcase first for it to run properly you need the negative pressure from the case to press the mixture into the cylinder. You will also need to make transfer ports that don’t lead from the manifold directly to the cylinder although this would be possible if the manifold was also connected to the crankcase. You need negative pressure from the crankcase.

[@iconforu2c]

Don't know what to suggest. But I do know they will overcome any obstacle. Never under mind the power of commenters and Garage 54. Good luck. Peace.

[@BlueFangbluser]

As a two-stroke mechanic there are a few things to note. I watched this a few times to figure out exactly how the intake is setup and i cant quite make it out from the video. It appears the intake runs directly to the cylnder lining transfer ports. If thats the case the design just wont function. You need to create a suction to pull air in. On a two-stroke that comes from the changing of crankcase volume. Piston goes up, crankcase volume increases, creates a negative pressure. Air is pulled into the crankcase tbrougb a set of reed valves. I didnt see reed valves anywhere in the setup either. When the piston comes back down, it decreases the crankcase volume, compressing the air in the crankcase, when the piston uncovers the transfer port, the compressed crankcase air blows into the cylnder. If your air isnt passing through the crankcase, you arent building air flow. Remember air isnt pulled in from the piston coming down and building suction in the combustion chamber like a four stroke. If you dont have a set of reed valves in each of the four air circuits then it wont run either. When the piston comes down, instead of compressing the air and blowing it in the cylinder, it will just blow the air back out of the intake. If each air circuit is not air tight it will also not run right. I wont go into detail since you covered thag at the end of the video anyway. To improve this could go two ways. 1). Reroute your intake. Air goes in the carb, splits into four intake runners. Each runner goes through a reed valve, then directly into the crankcase, each in its own isolated circuit. Then you make a second pipe, only a few inches long that connects the crankcase to the transfer port in the side of the cylinder lining. To clearify aur comes in the carb, through the reeds, in the crankcase, builds pressure, then blows out of the crankcase and into the transfer port through a second intake runner. Something to nite with this is that crankcase volune is important. You want to fill in the crankcase as much as possible. Basically reduce the amount of volume between the reed valves and the transfer port. A lada is 1.6L engine. Each piston only covers .4L of displacement. So if the entire crankcase volume of one air circuit is say 1.2 liters of volume because the crabkcase is so large, then when the piston comes down, it goes from 1.2 liters of volume in the crankcase to.8. thats not alot of pressure. Its only building a few pounds of air pressure to blow air into the transfer port. If you can use epoxy to fill in the empty unused space inside the crabkcase and reduce the total volume you get mkre pressure. Say you reduce the total volume (with the piston at tdc) to around .8L, when the piston comes down (again reducing the volume by .4L) you have significantly more compression, more pressure forcing air out of the crankcase and into the transfer ports. 2). The ither method would be to ditch that entire setup and reroute your intake to that if a detroit diesel engine. Detroits are two strokes but also have an internal engine oil. Thiugh this eet up would be alot more expensive and probably couldnt be done with parts laying around the shop. Unless you just happen to have a powerful enough blower just laying around.

[@davehoward22]

Things you do with them ladas is borderline genius..

[@marceljordaan8245]

A two strokes intake is mainly within the crank case.The vacuum created from the piston traveling up draws in the fuel air mixture into the crank case. As the piston starts traveling back down the intake on the crank case is shut off via means of a read valve or rotary valve. the pressure from the piston traveling down now forces the air fuel mixture to the combustion chamber via passages from crank case to cylinder ports. That's how it works. Sadly what they tried here would never work, because the intake port is WO at BDC there is no vacuum to draw in the fuel and air.

[@mondude9754]

Another thing to consider is that when the center two cylinders are sharing crank case pressure, it is unlikely that the intake ports are drilled at exactly the same height in the center two cylinders, meaning that one cylinder will get some air fuel mixture dumped into it more than the other. Maybe not a big concern just speculation

[@oroszijanos8952]

5:20 The exhaust port opened when in OT position, that means the crankshaft chamber let the pressured fuel-air goes away on the port here to the atmosphere, you should fit an other type of piston on the engine what don't let open the port in OT position. You must use reed walves because the inlet port and the transfer port are opened at the same time. And use short hose between cylinder and carburetor.

[@trenthollifield6969]

Thank yall for all y'all's hard work for everything y'all do for our viewing pleasure KZbin should be paying y'all way more money

[@thev3machine575]

Each cylinder needs to be sealed from each other in the crankcase so when the piston is travelling down it creates pressure underneath the piston in the crankcase which then needs to push the air up and around into the cylinder above the piston, this type of crankcase seal in a marine application is called a Labrynth seal, the port that allows the pressurised crankcase pressure to travel into the cylinder is called a transfer port.

[@thev3machine575]

Labyrinth*

[@sealstech8087]

I feel like dedicated carbs to the cylinder pairs would help. If the cylinder head warped while welding, over and under pressure could occur between cylinders. Maybe try a thicker plate, drill a large hole into the plate half thru and then drill/tap for the spark plug. When it did fire, it definitely sounded like it had too much gas or too little air. Combining exhausts for the cylinder pairs may help. The reed valves you tried were a good call, I have no idea what the crank case seal from bay to bay is like and may also cause under or over pressure issues. Timing is everything with 2 strokes.

[@diesel-technology5507]

There's no forced induction, you need either crank case forced induction which uses the pistons descent to shove the charge into the cylinder or a supercharger to force the air in

[@경호-i4h]

The first problem is, what force do you think the mixer is sucked into the combustion chamber in the two-cycle engine? You can see that when you look at where the carburetor is. In the original two-cycle engine, the force of vacuum generated when the piston is facing tdc is sucked into the crank chamber and then back up to the combustion chamber by the pressure coming down to bdc. But in this experiment, the carburetor is directly connected to the combustion chamber, so there is no force to suck the mixer in, so a supercharger is needed to push it forcibly. The second problem is basically one of the essential factors for two-cycle engines to require the pressure of exhaust gas. Because the structure opens the exhaust passage when the mixer enters the combustion chamber, there is not enough time for the mixer to stay in the combustion chamber. So, the chamber is installed to keep the exhaust gas under constant pressure. This is what the higher the rotation, the more necessary it is.Thank you always for the fun videos and I'm enjoying them.

[@gifilipo]

That is something I’m really looking forward to see! Congratulations

[@JeffLaing-c2f]

I think it needs 2 carbs as 2 pistons are up and 2 are down or 1 for each Cylinder very good to watch 👍

[@nathaneadson2019]

It's ya ignition timing. You have supercharged induction. Inlet n exhaust slots maybe need moving or reshaping. The back pressure of exhaust is required 2 increase efficiency but it should run without. Twin starter motors maybe needed to get required spin speed for starting. You are nearly there. Good work:-). You never fail till you STOP!. keep goin

[@sametduzenli3038]

According to that piston size, the intake ports and exhaust ports are narrow. If you enlarge them it will work. Normally crankcase pressure is also need. But this will do the job.

[@pedrosalmeron6576]

The carter is very large, they have to shrink it so that the piston compresses the mixture better to make it reach the cylinder with more speed

[@65bug519]

try the 2 stroke system with valves and ports like a Detroit diesel, it does not use the bottom end for induction, it uses a blower to force air in.

[@AlienLivesMatter]

Nice progress. Maybe use baffles in the crankcase to direct flow

[@tonystanton9223]

sounds to me like you have the port timing incorrect, it works in the same way as valve overlap and duration,and by the looks of how its spitting fuel back out the carbie your intake port is opening to early pushing the intake charge back up the manifold instead of flowing through the engine ,love the channel guys !! huge fan !!

[@leealsing1539]

I'd like to see you try again but try it valved rather than ported, with a super charger

[@thematronsmilitia]

In my opinion it's that you have to have exhaust restriction make good compression with a 2 stroke. That's why they have funny shaped exhaust, to create a resonant wave that pushes fuel and pressure back toward the cylinder

[@jesusyeshuaelelyonelshadai6295]

I love your ingenuity and work guys you all deserve 10 million followers 😸👍... отличная работа, ребята, я уверен, что однажды вы станете еще лучше.. Да благословит вас Бог

[@sled_neckx9972]

@Garage 54 Maybe try a diesel injection pump in conjunction with 2 stroke fuel. Place the injectors next to the spark plug. I am thinking direct fuel injection would solve fuel delivery issues. If you don't get enough air, then you can use a supercharger to force air into the cylinders as well.

[@PossumSwanger4]

These guys always amaze me with the stuff they build.. they are surprisingly good at making almost anything work it seems.. I wish I had the knowledge of fabricating all this stuff, the creations I would make would be amazing and crazy 😂😂😂

[@JohnJaggerJack]

You can machine the intake and exhaust ports on a Vertical Mill and use the power feed to get them to have all the same height and that might help.

[@fampic7133]

Im baffled at the off the shelf "coil on plug" conversation 😂

[@TECNICO446]

1 you should keep the original head of the engine with valves closed and if need increase the compression,2 any 2 stroke engine work as a pump so: when the piston reach the PMI it create the pressure to push the mixture (air/gasoline) in the cilinder thru the transfer ports,3 you have to create a separate crancase for any cilinder,4 another ting is the exhaust,the way you did is too open,but the first problem is that this engine in that way don't look like a pump,hope i'm been clear as exaplation,is always good to look at your videos.

[@jussikuusela7345]

Just somen thoughts of an ingnoramus: For a better balanced 2t function the 4 neck crank should be modified so that no two pistons are at tdc at the same time. Essentiallly cut it in half and turn the other end by 90 degrees. Then the distributor must turn at 1:1 ratio with the crank The crankcase must have individual compartments per cylinder and each compatnent needs to have a one way intake valve. Maybe a normal camshaft and head could be made to turn at 1:1 ratio as well with the valves opening near bdc, exhaust first at end of downstroke and intake at begin of upstroke, and intake bieng force fed by the crankcase. This way no ports need to be made and the timing can be adjusted.

[@theredlobster4693]

Needs to have some sort of positive pressure blowing in the fuel either it be a turbo or supercharger look at the old 2 stroke diesel

[@zeropejil2]

This has got to be one of the best youtube channels

[@fry.master]

hey man, you need to put that reed valve in front of each cylinder, ensure each has their own separate crankcase volume, then get to work tuning the exhaust shape.. your motor has some real funky ports, not sure how its going to need to be oriented geometrically, but yolo good luck

[@Texassince1836]

Leave the regular head on. Set the cam to turn a 1:1 ratio with the crankshaft. Disable the intake valve (seal it shut). Let the exhaust be driven by the camshaft. Cut intake ports in cylinder wall, and feed air/fuel mix into them with a supercharger of some sort. 3psi of boost should be enough to drive it.

[@patrickbrady447]

I would get rid of the big intake manifold and fit 4 motorbike carburators [ from a motorbike with the same or close to the CCs of 1 cylinder] mounted on a short intake adaptor close to the engine. I also think you need to do a better job seperating the cylinders in the sunp area, I would use the main bearing cap and weld flanges to them as seperators abd build 4 sepreate sumps with a carburator fitted to each sump. I would also play around with the timing and see it that helps. Good luck with it, I really love youe channel. Watching from Perth Australia.

[@marioncobretti7870]

I would try camshaft, 1:1 ratio with crank, forced air . Mazda has made a complicated version of that., they work

[@paaa2683]

Need a supercharger for it to run. All 2 strokes need an air pump of some sort for positive pressure on the intake port. Some work via the crankcase, others like diesels with oil sump need a supercharger to run (and is still considered naturally aspirated). Get positive pressure on the intake ports. Use a vacuum cleaner motor if you have to!

[@robertvanderbush737]

You either need a forced induction to push the charge into the cylinders or some long narrow exhaust tubes to pull the charge into the engine through scavenging effect like the "tuned port cans" on dirtbikes

[@sarantdgr]

You should use Power valve System in exhaust outlet ports and also after Expansion Chamber separate for each Cylinder. Requires and four carburetors with ratio cubic centimeters to millimeters of the each carburetor in mm. and to perfect the result you need flanges and seals for compression in the crankshaft chambers