The Most Powerful Two Stroke Ever - First startup attempts

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Assembled and ready for a test-fire!
Please go back and watch earlier videos to understand what's special about this engine.
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This is the road to the most powerful two stroke (relative to cc) ever. Aiming for 30+hp from 50cc.
Lofty goal!
Here's a few key points:
- 100% bore width single exhaust port, no bridges, non. This leads to unrivaled blowdown specific time area.
- What should be excellent transfer duct geometry, large radius on inner walls to minimize flow separation, constant side wall angles for control, large duct volume for gentle "delivery"
- Valveless tuned length intake with nitromethanol injection, aimed at the transfer inlets.
- Ridiculous crankcase volume, no piston pumping here, it's all about resonance!
- Tuned pipe, tuned crankcase, tuned intake, tuned everything, resonance!
To be able to run such an monstrosity of an exhaust port without instant catastrophic failure there's a special two-piece piston with a retained piston ring(thanks Mark Atkinson). It has no holes in the skirt either, no short circuiting between the transfers and the exhaust.
I've designed the whole thing from scratch.
3D printed, cast(lost PLA), and "Nikasil" plated the cylinder myself in my garage. Designed the case and pipe for it. I've received lots of help from the community with things I haven't been able to do myself(lack of machinery and/or skill)
Especially machining, until recently I didn't even own a lathe.
Thank you guys, you're the best!
I've designed and built a landspeed bike for the engine, plan is to set a new class record at Bonneville.
Thanks for following the adventure, and fear not, I've already got plans for the next project - Symmetric transfers, four exhaust ports, two rotary valves(but not where you think they'll be), forced induction, no need for expansion chamber(!) ++
Many years of two stroke madness up ahead!
Easy is not worth anything
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Опубликовано:

30 сен 2024

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Комментарии : 631

@mitchellbaker4847 4 года назад

I remember not too long ago it was just a man in his shed with some drawings, a camera and a dream.

@peffypluis9786 4 года назад

I was hoping for the ring not to snag, so this ending will do for me! Exciting stuff!

@2STROKESTUFFING 4 года назад

Exactly, everything else is just formalities.

@deborahchesser7375 4 года назад

2STROKE STUFFING gotta chamfer those ports

@ritzevespa 4 года назад

Your getting there, but uhm, when the piston leaks, you won't get any good case pressure. My engine runs great with 0.6m clearance, but it has 2 rings, I'll bet when you have the right piston rings it Wil fire up, Oh try to inject a little bit of brake cleaner to start it 🤗

@adamdoig1448 4 года назад

New Zealand here just saying I’m on the edge of my seat bro carnt wait🤙

@joshuaharrison9331 4 года назад

same bro

@susann4209 4 года назад

Same

@joecarnes9174 4 года назад

Ive been there for a while now 😉

@SoadOwnsUrFace 4 года назад

Same lol

@deep.2606 4 года назад

I have never clicked this fast on a video

@ghost-carnage8964 4 года назад

Bro same. I've been waiting for this build to be complete

@deep.2606 4 года назад

ghost- carnage i wonder what happened to the metal 3d print he was talking about🤔

@2STROKESTUFFING 4 года назад

Never heard back from them after mailing the file...

@deep.2606 4 года назад

Okay, love the vids, looking forward to more of them!

@MakingStuffUp1 4 года назад

maybe a total seal type ring will do the trick. Or two thin rings with the gaps set 180 apart.

@Cig4ras 4 года назад

I had done 2 rings with the gaps set 180 apart , went from around 10bar ( don't remember exact number ) , to around 14bar compression , that was on my old Honda CBR125R single cylinder engine , I have no idea how it ran on 95gas ( but would try to go for 98 if the station had it ) and it gained noticeable low end torque and survived for more than 10k km and was sold still running strong , might be a good idea maybe

@CZ350tuner 4 года назад

@@Cig4ras Measured a cold cranked 14.5:1 compression ratio, with a forged ASSO Werke 3 ring piston on a low friction bearinged, skimmed, ported, gas flowed & blueprinted 1979 CZ 125-476.5 engine I built for a friend, back in 1985. It dieseled when hot, even when running 4 Star leaded 99 RON petrol. With the ignition off the bike would idle until the carb emptied of fuel. In 1986 it was stopped for speeding, after my friend overtook an unmarked cop car on a dual carriageway. The court summons stated that it was clocked at between 98 & 104 MPH for over 3 miles VASCAR. My friend had the summons framed in his living room as it stated that the bike responsible was a CZ 125 Sport. He was banned for a year. We measured a best fuel economy (??) of 27 MPG. (Stock is 65 MPG). The sprocket ratio was upped from OEM 14:52 to 19:52, which meant that the bike had to be doing at least 75 MPH in 3rd gear to transition into 4th (top) gear as there was a flat spot in the rev range at 73 MPH in 4th gear due to the porting and expansion chamber interaction (Serval expansion pipe).

@Hellsong89 4 года назад

@@Cig4ras Isint that the standard past few decades? My old Suzuki S moped had two ring setup like that, if i recall right and its from factory. That engine has went from factory around 30K km with out any engine rebuild, though i never used 95 octane gas in it and has run 3% mix.

@Cig4ras 4 года назад

@@CZ350tuner Wow , that's kinda crazy , mine would only idle for a little bit after ignition off SOMETIMES , but wow for a 125cc ( even if it's 2 stroke ) , thats faaast

@Cig4ras 4 года назад

@@Hellsong89 Not really , as we are talking a little different scenario , going from 9-10bar compression to ~14bar , which would usually need racing gas so you woudn't get early detonation + I put custom gasket's which were waay thinner and to be honest Im not even sure how it survived , since I abused that engine real bad , but it never ever dissapointed me , redline (after increasing compression it went from ~11k to ~12k rpm) for 3 hours straight ? Sure , why not

@markbarlow4918 4 года назад

Keep up the great work! Loving your content and really appreciate your efforts. I think we're all sympathetic toward the challenge you've set yourself and hope your mind is in a good place! 🚦 🐇 🐢 🏁

@justinevans6546 4 года назад

Worthwhile endeavors are rarely easy,

@Matowix 4 года назад

Like life

@DieselRamcharger 4 года назад

its not worthwhile. the 2 stroke engine has already been taken as far as it can go. everything this guy is learning now has been well established pool of knowledge for 50 years.His ignorance is what makes this seem achievable to him. He doesnt even understand what it is he doesnt know. Making the journey of self education very difficult and the chance of favorable outcome very slim. Lots of people have tried this before. Stumbling through the dark hoping to trip fall and land in a puddle of the best solution is NOT how it woirks. Zero Engineering at work here.

@Andrew-my1cp 3 года назад

@@DieselRamcharger I take it you never worked hard on your passions. Of course someone has already done max efficiency and max performance but he is trying to break it again. If not, then he made a powerful 2 stroke while learning and teaching others. Kindly piss off with your hate

@SpaceShipDeathstar 4 года назад

"The most powerful two stroke ever" Laughs in container ship engine.

@asktoseducemiss434 4 года назад

Preventing it from starting because that small bore doesn’t produce enough torque to compensate for any drag! It’s different from starting a lawnmower with a drill I think the

@jojessegaming9630 4 года назад

i don’t think a ship engine is 2 stroke. is it?

@SpaceShipDeathstar 4 года назад

@@jojessegaming9630 Oh yeah it is. Watch any documentation about it. They are very happy to tell you about their borderline megawatt ~ 250rpm direct drive to the propeller engines. Also try squeezeing the heavy oil fuel through injectors. Ports do a much better work in such application.

@2STROKESTUFFING 4 года назад

Hp vs cc

@andywheeler9583 4 года назад

jojessegaming some small boats still runs 2 stokes, evenrudes are still a 2 stroke engine, and bigger boats tug and even some larger pusher boats ran 2 stoke Detroit’s back in the day

@daveth8741 4 года назад

The rings between a piston cylinder (system) "evolved" in the beginning of the twentieth century, so that in order for the ring to expand (and seal) it was by way from the "air pressure" and the act of compression. All this fine line of finicky futility and distinction, is so advantageous in hopes that Your cylinder doesn't get scored from having a piston ring Our snowmobiles had the ring "pinned"* at the gap (within the groove so that the ring could not ever rotate around (and catch on any of the "large" ports) * This pin was like a teeny tiny roll pin that all fit within the piston groove

@gadnuk7159 4 года назад

Don’t get discouraged. It’s still progress and you have plenty of avenues to explore for solutions. Definitely jealous of your tig machine too

@braydonbeshirs4615 4 года назад

The only thing I'm wondering is how is it the most powerful 2 stroke?

@2STROKESTUFFING 4 года назад

It will be, eventually...

@gadnuk7159 4 года назад

Braydon Beshirs the cylinder/port design is supposed to increase volumetric efficiency and allow for higher rpm

@mathiaskling6154 4 года назад

Braydon Beshirs In hp/engine volume. This is only a 50cc but if you scale it up your should get the same results of course multiplied by whatever the engine size was multiplied with. Make sense?

@CZ350tuner 4 года назад

All success is built on a firm foundation of previous failed attempts. An old English saying, "If at first you don't succeed, try, try again".

@bobmonkhouse50 4 года назад

I feel your pain, I had a number of problems with my barrels trying to get them to start and finally worked out why but that's what happens when you try to do something different but the disappointment and all the feelings of futility soon disappear when it finally fires up. Also, are you using sg for the ring? (spheroidal graphite). If you are then you need to use the higher hardness material and it needs heat treatment. I use sg in my liners of 600/3 grade which is easy to machine but the second hardest grade available and is ideal for liners giving good durability. The hardest grade of 700/2 would probably be the best for piston rings. A lot of quality rings are sg but obviously they thinner you go the more brittle they become which is why all the thin rings are heat treated cold drawn wire. Keep going, you're almost there. And your name's Pip. Pip. I knew I had seen it previously but unfortunately I don't have much of a memory. It's on your barrel. 🤣 🤣 🤣 Regards, Bob.

@2STROKESTUFFING 4 года назад

👍Thanks! I'll talk to Mark about the ring material and possible solutions,can't remember what he used. Name's Alex, "pip" is just the cylinder "Primus Inter Pares"

@bobmonkhouse50 4 года назад

@@2STROKESTUFFING Alex!!! Aha. Your surname isn't DeLarch by the way? 6655321 by any chance? 🤣 Mark knows a lot more than I do but I do know he uses sg in his liners although he refers to it as Durabar. It's a fantastic material and something I love machining. Bit sad really. 🤣

@bobmonkhouse50 4 года назад

By the way, you have a lathe so it's not beyond your capabilites to make your own rings, sg/Durabar is available in different diameters and isn't expensive and I'm sure a man of your talents can do basic heat treatment, also try en24, it's a steel that should be hard enough and durable enough to make rings from without heat treatment

@theafro 4 года назад

I agree, it might be a good plan to learn to make your own rings, since Mark is the wrong side of a decent sized ocean! It would also allow for a little experimentation. once you've got the tooling/process figured out, they're pretty easy to make, and as long as you work methodically they'll be pretty consistent. I've only ever made rings for larger, slower engines so your results may vary! Glad to see her together and turning over, she'll be growling soon!

@Fumacenta2tempos 4 года назад

Are you sure the pump carb is pumping? I had problems before... (I know the ring stuff, but i think it would start with .4mm anyway)

@2STROKESTUFFING 4 года назад

I should take it a part and clean it just in case!

@Beng177 4 года назад

I have been waiting for this!!

@AuMechanic 4 года назад

A one way bearing for the starter, cheap as. You could machine some ends (drill shaft and socket shaft) for the OD and ID to press on to the bearing.

@2STROKESTUFFING 4 года назад

👍 Much better solution! Had to work with what I had on a Sunday night, urgent matters...

@AuMechanic 4 года назад

@@2STROKESTUFFING It worked for a while. Maybe give it a soak of WD40, a blow out then force some grease in it to get the ratchet working again. If it works ... it works.

@legros731 4 года назад

@@AuMechanic the ratchet head is dead the not made to do that it was falling apart at the end

@boneav83 4 года назад

A wise man once said 'The beauty is in the attempt' I love 2t anything, but especially bikes, im hoping it all works out.

@hank5655 4 года назад

Your efforts are great, but the best possible to check the squish area is play doh also I don't know what resource's you have but copper is the best gasket for the head. a lot of rings are made of cast iron with some other metal in it, Stay strong in the mind and you will get it going..

@stusmith1074 4 года назад

The most powerful two stroke ever??? Bull sh1t my mate has a vehicle with 19 litre V12 Detroit diesel engine, 2 x superchargers 2 x turbos and even that is not the most powerful two stroke.

@dustinwolfe9591 4 года назад

I think it was originally titled most powerful 50 cc 2 stroke but after several years of videos has simplified the name a bit.

@SoCalTrooper 4 года назад

I'm with you, it's got to be the rings. See you next time

@30secondsofcombustionengines 4 года назад

Italkit Rotor it's shit. Try malossi or PVL. And Best carburator is Keihin. Forget the Oko. :)

@spoolin610 4 года назад

Sounds promising. The devil is in the details.

@scottpeck1149 4 года назад

I think God is in the details Superior being

@DieselRamcharger 4 года назад

@@scottpeck1149 you dont get it.

@johnconner8901 4 года назад

Keep it up and tighten up that gap what compression ratio are you shooting for with all that nitro

@motokid1492 4 года назад

3:19 thats some old school gasket making right there !

@tritiumrecords717 4 года назад

I know right, hopefully he accounted for the change in port timing, I used to set my deck height, then check the squish, if any changes needed to be made I would machine the top of the barrels or mod the head for a good squish...

@2STROKESTUFFING 4 года назад

I've used 0.6mm in the design, touching the head at about 18k on similar setup with 0.4, estimated this to hit at 22k or so which would be perfect.

@mr-janzki 4 года назад

You can hear it wants to, cant wait to hear it running! Good luck, very relaxt setting in your video's joy to watch.

@robotekusa 4 года назад

I rEaD tHaT I cAn PuT AluMinUM on AluMinUM aNd iT woNT leAk. lol waj. How can u even claim most powerful 2stroke ever when u can't even cover that basics 😆

@2STROKESTUFFING 4 года назад

@bermyvlogger 4 года назад

im gonna second the timing comment. u need about 30deg btdc for high rpm 2t. reeds need 2 be soft if u have low compression/low case suction . o ya and throwing a tuned pipe or muffler for some back-pressure would REALLY help. side note- make sure there is enough fuel flow. with that rpm spinning + no tuned pipe we should see a fine mist from that pipe . keep going. u can do this !!

@2STROKESTUFFING 4 года назад

Haven't thought about the reeds, that might actually be a big problem. I'll see if I can find some real soft ones. There's a pipe coming!

@TimberTramp 4 года назад

Send your pattern to Cometic and they will scan it’s in and cut gaskets of your choosing. They have lots of materials to choose from but I been using Viton coated steel .008” and copper .005”

@2STROKESTUFFING 4 года назад

Cool!

@jasonwatkins86 4 года назад

I think it's funny when watching videos of people masterfully crafting xyz from steel, at some point they need to weld it and they have to add a note to the video quickly explaining that they aren't welders and they know it looks like bird-shit to head off the comment section full of "wElDrS" casting shade on the dudes welds even though the welds serve no structural purpose to the project.

@2STROKESTUFFING 4 года назад

Spot on.

@danv8734 4 года назад

Impressive work so far buddy just going by the sound it was making it sounds like it is not drawing through the primary carb? Either there is a crank case leak or maybe the crank case volume is just to big now as the transfer ducts are very big now and a 40mm bore is not going to move a lot of gas, I think I’d do a crank case compression test next. But the ring wear is concerning Keep at it!

@2STROKESTUFFING 4 года назад

Thanks! Yep, massive case volume is not working in my favor here.... It does suck through the carb tho, reacted to throttle/choke. I remember easily starting the "other engine" with the rotary valve completely removed, if that's possible, big case should be too.

@mikecorleone6797 4 года назад

We built a small diesel 2 stroke engine years ago.. we had to make 4 piston rings for it to make it work. The engine was based on a gas weed eater engine and used a very primitive home made fuel injection system we made out of copper piping and springs. Worked pretty well. Never had the chance to have the engine dyno run but we did put it on a mountain bike and it got the bike up to 38mph which was cool

@2STROKESTUFFING 4 года назад

Awesome!

@dbxlkevsmith787 4 года назад

You might have to use a one-way bearing for the drill starter because I did the same thing with the ratchet substituting for a one way bearing. I was trying to start a 30.5cc small bore engine and it failed. Believe it or not it’s not spinning free enough like a one-way bearing it sounds like it’s about to start but it didn’t! Then Eventually the ratchet mechanism inside failed inside! I put the one-way bearing set up on there and it started right up the ratchet causes too much drag and take the natural combustion cycle out of rhythm Preventing it from starting because that small bore doesn’t produce enough torque to compensate for any drag! It’s different from starting a lawnmower with a drill I think the piston is so much bigger and produces a lot more torque so it will compensate for any drag that a drill that has a Ratchet end or as you have seen with a straight drill with no mechanism for starting just a socket and extension.

@dbxlkevsmith787 4 года назад

Joanna 😂👍🏾

@adr1uno638 4 года назад

By the sound of your torch and the look of your weld, it seems that your argon flow is probably to high. This has a tendency to catch the air in the argon flow by the ventury effect. Set the flow as low as your skin can detect it, that will do the trick :)

@2STROKESTUFFING 4 года назад

Thanks, great tip!

@chrisunbekannt5887 4 года назад

Check the ignition it seems like your ignition ignites after tdc not before

@WOTTechnologies 4 года назад

Another note: it's common in the auto racing industry to gas port the compression ring,. So, just as the final compression is happening, it forces the ring to expand with gasses from behind. This allows you to use softer rings that ease drag, but still seal tight during combustion. Basically just small hole(s) from the piston crown to the inside of the ring land.

@2STROKESTUFFING 4 года назад

👍 I was thinking of doing lateral ones.

@jonathansanchez1305 4 года назад

That ratchet head probably would have lived longer if you put grease in it. Don't worry about it slipping with the grease in there; it will not.

@2STROKESTUFFING 4 года назад

I did squeeze in some. It was cheap crap tho, I'm buying another of the pre-made ones, works great!

@hammerheartdan6311 4 года назад

Correct me if I'm wrong but don't 2-strokes need an expansion chamber for the exhaust in order to run or start-up correctly?

@2STROKESTUFFING 4 года назад

They usually start fine without one.

@fictional25m 4 года назад

it sounds like your timing is off remember it has to be before tdc as it takes time to burn the fuel use an old fashioned timing light its the best way to adjust it also your port windows have to have so much time or your fuel/air mix wont be pushed though your transfer ports if the reed valvue is to stiff it can cause issues with the piston not having enough to open them far enough

@gingersquatch9844 4 года назад

Would taking the ring up to 650 - 700F and then oil quenching it give the proper hardness and rigidity??

@2STROKESTUFFING 4 года назад

👍 we'll make new thinner and harder ones, 0.5mm.

@monkeypenllwyn1 4 года назад

Have u thought about using a pressurised ring set up with small holes in the piston top leading to behind the rings thus using the combustion to hold the ring out and seal better, although i think your right with the ring it should be so hard as to snap before bending

@2STROKESTUFFING 4 года назад

Might go there, we'll see how the new piston/ring combo works. Combustion is still what forces the ring out and seals tho, even without the holes👍

@pisunets 4 года назад

Do you have a reed valve in the engine? If yes, is it suitable for high RPM engines? I thought it is good at low and middle RPM

@2STROKESTUFFING 4 года назад

Reed valve for starting and warmup, valveless secondary intake for power!

@metalbill 4 года назад

I'm pretty sure a detroit 16v91 makes more power than this.

@2STROKESTUFFING 4 года назад

Not hp vs cc...

@thetrain5785 4 года назад

Here is an idea! Just play a 30 minute commercial before your 15 minute video just to get it out of the way!

@2STROKESTUFFING 4 года назад

I'm sorry. It's out of my control. What country are you in? Here in Norway there's seldom more than 2-3 commercials in each vid, maybe 1min long combined. I fear it's a different story elsewhere.

@peterzingler6221 4 года назад

You could do a trick and use the compression to enhance the press fit of the piston ring against the zylinder. Not sure if this is a good idea for a high rpm two stroke tho

@2STROKESTUFFING 4 года назад

Compression/combustion pressure IS what makes the ring seal.

@jaydenbrockington4525 4 года назад

Never clicked faster!!!

@nfdr0kk3rz 4 года назад

I did wonder if all that cranking without any oil or assembly lube would cause premature wear somewhere

@2STROKESTUFFING 4 года назад

There was plenty of oil, don't worry!

@johnconner8901 4 года назад

Since your piston is two pieces can you just calculate the thermal expansion of a ring for the egt you plan to get close to and not have a split in the ring at all since the split on the ring on a conventional piston is to install it over the piston

@moguaiato5583 4 года назад

It already is a gap less ring.

@silverhaze2382 4 года назад

There were big rigs back in the old days that are Two Stroke diesels ...much more power than this

@2STROKESTUFFING 4 года назад

Hp vs cc

@ValExperimenter 4 года назад

Many 2 stroke rings are steel, Steel and nodular iron rings are about twice as stiff for a given dimension as grey cast iron. Steel rings need a plating to run on cast iron bores., no idea if that is needed for nikasil. You are probably doing this but when welding in a lathe put the ground clamp on the part or chuck to avoid passing current through the bearings. Low compression is probably the ring. Inspect the edges of the ring and the chamfer for teltale marks. To increase ring pressure you could try putting one of those old school expanders behind the ring, some 60's and 70s two strokes had them behind number 2 ring.

@johngalt97 4 года назад

Nikasil bores use unplated rings. One, either the bore or ring surface, has to be the 'wear' surface that gets seated to the other. I discovered this when converting the top end of a KE100 to iron cylinder.

@Spoonersoutings 4 года назад

Mite be worth using a Engine compression tester so you know exactly how much compression you are making and to make it easier to compare to a standard engine. Your getting there buddy 👍

@rjc862003 4 года назад

cylinder walls are not nikasil plated are they ? this is not Optional with aluminum components

@2STROKESTUFFING 4 года назад

They are, by me.

@rustycatslife8304 4 года назад

wow that engine sounds crazy i wondoer how it going to sound at 20k been following your build from the start

@sos8747 4 года назад

He didnt even start the engine man

@1991enduro 4 года назад

Ive been here from start we will get there in end

@tuomas5540 4 года назад

i think you turned the flywheel at wrong direction. I think it will start when you spin in to the left. Atleast with my two strokes that's the key to start them with the drill :D

@Bakafish 4 года назад

Where was your TIG ground?! You can't let current go through bearings. The tiny contact area will destroy them!

@2STROKESTUFFING 4 года назад

Was on the "right side", heat might have screwed things. And that ratchet was crap too... I'll buy another of the pre-made ones.

@Bakafish 4 года назад

Let me explain. Our friend was using his lathe to align the ratchet and weld up the socket to it. Electrical welding requires a very high current circuit to be established, so a ground path back to the welder is required. If you put the grounding clamp somewhere on the lathe itself, that current will (at least partially) flow through the chuck, then bridge across the bearing surfaces. Since the whole idea of bearings is to minimize contact, and they are riding on a thin layer of grease, what happens is that the current will end up arcing across those tiny interface points. This of course can result in horrific localized damage to the bearings. The ground needed to be positioned to prevent such a thing from happening, but his tight shot didn't reveal to my eyes the clamp anywhere I would have hoped to see it.

@Bakafish 4 года назад

@@2STROKESTUFFING Wasn't (too) worried about the ratchet. I give you props for that brutal decapitation :-) What I'm concerned about was the lathe. I saw some good how-to's on rotary welding tables that clued me in to the danger of grounding through bearings. Hope yours are safe!

@blind8686 4 года назад

Its so close man! I cant wait to hear it running

@AcousticNRG 4 года назад

you should colab with jonny q90

@Make-Asylums-Great-Again 4 года назад

I don’t know what camera you’re using but I really like the quality.

@2STROKESTUFFING 4 года назад

Thanks! Old Nikon D5100 with a 50mm f1.8 lens.

@tristanburke2451 4 года назад

Doesn't seem to have a lot of compression if that drill can spin it over that fast

@2STROKESTUFFING 4 года назад

👍 It didn't, found the issue and fixed it in latest vid.

@danv8734 4 года назад

Also maybe blank off the secondary intake as a test incase that is leaking

@2STROKESTUFFING 4 года назад

👍 Good idea!

@nz5123 4 года назад

Nice work so far ,my compressor piston rings snapped on disassembly, now it running better than ever with one 1970s briggs stationary engine ring I made fit that was the right diameter I had in the junk pile haha, still going after 6 months ..

@mpmcnicnacs2917 4 года назад

Are you going to put an expansion chamber on when you get it running?

@2STROKESTUFFING 4 года назад

Absolutely!

@MrDannyd9 4 года назад

The mouth of the exhaust needs to be funneled to take advantage of the volume in the exhaust pipe. This is even more important for a two-stroke, but you know that.

@peterzingler6221 4 года назад

I guess that's only for first test runs

@2STROKESTUFFING 4 года назад

Yep

@waynewilliams1887 4 года назад

U haven't got a clue hill Billy lol

@haraldpettersen3649 4 года назад

En Norsk kar, det er sjelden kost på RU-vid. Da abonnerer alle nordmenn raskt, Lykke til :)

@pieterbarneveld9518 4 года назад

Another New Zealander here , love watching the progress and setbacks. Thanks for sharing

@denniswargo4184 4 года назад

I thought this guy might have some new ideas, but no just badly mad parts.

@2STROKESTUFFING 4 года назад

Mad parts is where it's at!

@marco_fabbroni 4 года назад

I’m very excited because I’m also designing/building a bit more roadworthy engine and it came to my mind that you are using an exhaust port with a very high surface area. That big exhaust port, at low rpm and at starting, can completely cancel the trapping efficiency. So the fact that you say that the engine has low compression may be for that also because the final ring gap is way to acceptable and should anyway start. So you should calculate the compression ratio with the Japanese method and if it is way too low you should try to block the exhaust port with a very little diameter exhaust. If you have any technical question, you’re welcome

@2STROKESTUFFING 4 года назад

Awesome, thanks! I wonder if porosity in the bore can be a problem, many of the small cavities are higher than the ring. Also the ring might bind in some way making it out of round. Lots to investigate!

@marco_fabbroni 4 года назад

@@2STROKESTUFFING Bore porosity? Haven't you already polished it? And watching the video I haven't noticed that you oiled the ring, have you tried to oil it? If not, why you don't try to add a little bit of oil from the spark plug hole.The oil dramatically increase the compresion if the problem is the ring or the bore. I'll be very pleased if I can help you in any way

@allanbigham1055 4 года назад

your bore finish may be far to ruff abrading the ring away

@marcwire9332 4 года назад

118 race fuel and not enough compression? try squirting some fuel down the intake, get your air gun from the compressor, turn the engine over and give the carb a puff of air to prime the casing and get things moving in the right direction, it will create a little pressure in the casing to allow more transfer port flow, I bet it would fire up then. CASS Compressed Air Supercharging

@2STROKESTUFFING 4 года назад

That's a good tip, I'll try that if I can't find out where the low comp is coming from.

@marcwire9332 4 года назад

try a wet compression test, add some oil to the bore to help seal the rings, this should help stop blow by on the rings

@rolandtamaccio3285 4 года назад

Plasma moly ring face might have a better chance of tolerating that taper whack .

@matthewh6424 4 года назад

I can't wait for you to find success. But to point out a potential problem that might be tough to address, there are pitting defects in the cylinder. They don't seem significant to me but may in fact be preventing full compression. All the best! I'm rooting for you!

@2STROKESTUFFING 4 года назад

👍 My thoughts exactly, gonna try to fill them with superglue, see if it helps.

@matthewh6424 4 года назад

@@2STROKESTUFFING you know its kinda funny but I've been working to start a rapid prototyping company casting 3d prints. I'm hoping to provide professional grade castings directly from prints. I've got the process down and have reached the wicked belt buckle phase. But the economy has beat me down and I no longer have access to a shop. Anyway, maybe I'll send you a new block as a promotion if I can ever find my feet

@crunchytheclown9694 4 года назад

Not sure who is more confused you or the people commenting ?

@2STROKESTUFFING 4 года назад

This comment is confusing?

@wiscopitbike 4 года назад

Your turning it over the wrong way by my eyes

@2STROKESTUFFING 4 года назад

It's the right way, no worries!

@BikerDaddy22RideorDie 4 года назад

I love how he claims to have “the most powerful two stroke” yet he couldn’t even start the fucking thing

@2STROKESTUFFING 4 года назад

Creating the most powerful two stroke has to start somewhere.

@BikerDaddy22RideorDie 4 года назад

2STROKE STUFFING don’t get me wrong I was sweating watching you make this thing and all I wanted to see/ hear was it run . Please don’t put a cintrifical clutch (excuse my spelling ) on the bike just doesn’t show it’s true power.

@stretchedbmx 4 года назад

You should see if it will start on propane. I usually first start my bikes on it because it makes for an easy start. I just squirt a syringe of 2T oil into the intake for some extra lube. Helps a lot with the pumper carbs that don’t always like to prime very easy the first time, until you get it actually running

@2STROKESTUFFING 4 года назад

Awesome tip!

@stretchedbmx 4 года назад

Even my head mechanic first starts the 700hp+ turbo busas he builds on propane

@tristanburke2451 4 года назад

Did you use assembly Lube when you put it together that might be why they're silver in the oil that settle to the crank and why your ring Gap is bigger because you're taking Material off the cylinder by spending it with a drill like that without lubricating the top and first maybe you did I don't know you didn't put it on video

@2STROKESTUFFING 4 года назад

It was oiled, no need to worry.

@tristanburke2451 4 года назад

@@2STROKESTUFFING okay just making sure because I've seen too many videos of people wrecking chainsaws because they didn't Lube the top-end before they put it together you seem to know what you're doing some of the s*** have watched on your channel is way over my head I build with chainsaws and air-cooled racing snowmobile engines I'm working on a 1986 Ski Doo Tundra with a 440 twin running a dual carb setup from mid-90s skandic for antique ice drags

@WOTTechnologies 4 года назад

I had a Goped many years ago, got it used with a modified unknown engine (free, neighbor threw it in the bin). The pull start recoil gave up when trying to start it, so tried a cordless drill and no dice. Went and grabbed a true electric drill motor (3000rpm) and it fired the engine right up. The benefit of using electric drill motor vs cordless is there's no chuck clutch (for the hand chuck) on most of them since they come with a keyed chuck - so it eliminates the need for a one way starter adapter since the engine will run faster than the drill motor once it's running. Also, it won't rip your wrist apart if it back fires.

@2STROKESTUFFING 4 года назад

Good tip, thanks!

@WOTTechnologies 4 года назад

@@2STROKESTUFFING Electric vs battery worked nicely. Well done. I honestly feel an iron or steel liner will do better than nikasil types, but may be way off.

@alltheboost5363 4 года назад

If those were all the problems then so far it's not that bad.... just keep at it. can't wait for the next video.

@mattychangedhisname 4 года назад

How many horsepower is this thing gonna put out on estimate?

@2STROKESTUFFING 4 года назад

30+ is the goal

@studog7851 4 года назад

Where's the pumper line on the Walbro that runs diaphragm and opens the jet. It should run from the base of the carb to the crankcase for pressure. It's never going top start without that.

@2STROKESTUFFING 4 года назад

It's part of the flange, hole through the reedcage.

@studog7851 4 года назад

@@2STROKESTUFFING sorry that makes sense 👍

@casperl6812 4 года назад

Offerings to the speed of god

@teokarlsson305 4 года назад

I love your videos dude! Just thought i would give you a little tip for when you cut off screws/bolts. Instead of grinding the end of them to make the thread work again, just put on a nut before cutting and then unscrew the nut after cutting. The threads in the nut will correct the screw/bolt

@2STROKESTUFFING 4 года назад

Awesome tip, thanks!

@teokarlsson305 4 года назад

2STROKE STUFFING happy to help, glad you saw the comment

@jediknight1294 4 года назад

@The Truth about Africa hurts its someth8ng thats easily forgotten and is a LOT easier.

@tinolino58 4 года назад

I do both

@donkEEpunch85 4 года назад

I do this with dies. I should've known it's been done before by others lol

@TedTucholski 4 года назад

0.016 squish @ 20000 rpm....Yikes. I'd say you need more. At least another 7 thou.

@2STROKESTUFFING 4 года назад

👍 That's spot on actually, 0.6mm 0.023. Didn't bother adding another gasket for testing. O n my previous build the piston touches the head at about 18k with 0.4mm, want it to touch at 22k or so here.

@TedTucholski 4 года назад

@@2STROKESTUFFING Love the vids. I have built a few 2 strokes in my time, mostly KT100 Yammies. Where is the piston hitting ? Towards the center or at the each of the squish? If its at the edge it's because the piston rocks a little. In that case cut the angle of the squish on the head maybe one or two degrees flatter instead of spacing it with a head or base gasket.

@robdoggerful 4 года назад

Higher two stroke oil ratio.

@pkuula 4 года назад

Hi. Nice to see you again with this engine! I think problem with piston ring is that cylinder pressure forces ring inward. Normally sylinder pressure is push ring toward cylinder wall.

@lorenzotesta7794 4 года назад

From italy...you are the best i hope you will be able tu run your engine and make 30 hp ☝🏼

@Witajciewmoimswiecie 4 года назад

How many horse power? And how much capacity?

@2STROKESTUFFING 4 года назад

50cc, aiming for 30+hp

@manfredlindfield9592 4 года назад

I wouldn’t make the gasket so big as in wide, it’s to great a surface area to compress, hence the possibility that it will not start, due to an air leak, try without a gasket, and use gasket weld that you can buy in a tube. This will prove my point Wright or wrong, then buy a stock gasket with a cooper collar/ring, this will compress, and then use high tensile steel bolts for added Tork, I wish like many others to be there helping you, keep it up and best wishes, Tip: when tapping the holes, clamp your work on a pillar drill bench, using the core drill to center up the hole, replace core drill for tapping tool, and use cutting oil, turn and feed the chuck by hand use a chuck key if you need to, and the thread will be center true and square, which leads to less resistance, plus you can buy three step ones so you cut out three times Making for a more genital cut, and healthier thread. That you can get a bit more tork too.

@makecoolstuff9170 4 года назад

Fascinating video! I appreciate the effort to set up the video while working.

@luckyluc8890 4 года назад

Work in progress! Can't wait to see it running, greatings from the netherlands :)

@troywee4774 4 года назад

every step is a step closer! thanks for the share!

@mikesecondo2254 4 года назад

Just buy a new motor!!

@blakefrost1110 4 года назад

All two strokes need them

@danielwilson5102 4 года назад

I hope you are just clickbaiting by saying this is the most powerful 2 stroke engine

@2STROKESTUFFING 4 года назад

No, I'm serious. When I've got the bugs churned out I'm confident this will be the most powerful two stroke relative to cc.

@danielwilson5102 4 года назад

@@2STROKESTUFFING Ah, now it makes sense! I was going to say the British Army among others used to use some massive (19 litre) 2 strokes in some of their armour.

@onecookieboy 4 года назад

Yet another New Zealander watching, Kia Kaha brother, (stay strong).

@GTTwincam 4 года назад

Wärtsila-Sulzer RTA-96C is 80k KW and 2 stroke, just saying.

@2STROKESTUFFING 4 года назад

It's also 1800k cc, which means a 50cc equivalent would produce 3hp...

@GTTwincam 4 года назад

@@2STROKESTUFFING True, but i don't think thats a terrible number for a diesel 2 stroke :D

@dgretlein 4 года назад

You could put a bit of molding clay on the piston dome, turn it over a few times and measure the gap. You may need more than 0.4 mm gap at that RPM - conn rod stretch.

@2STROKESTUFFING 4 года назад

👍 Definitely! For testing purposes. In my "other engine" the piston starts touching the head at 18k with 0.4mm.

@dgretlein 4 года назад

2STROKE STUFFING Doh! I love you channel, gotta say. I’ve shared with so many. I like your style, your approach to solving issues, and the problems you are trying solve with something as “simple” as a two stroke engine! I simply love it. Just watched the Bonneville record setting runs by an electric vehicle (Electraliner - EV West). I’d love to go to the flats .... it’s about 12 hours north of me .... you planning on another attempt?

@2STROKESTUFFING 4 года назад

@@dgretlein Thanks! Yep, going next year!

@cheeseandpickles98 4 года назад

Ever heard of a 2 stroke Detroit much more hp

@2STROKESTUFFING 4 года назад

Not relative to cc...

@mikemraz8569 4 года назад

You’re a brave man to do that with everybody watching it’s the scariest time for us people who build stuff I’ve been there many times I can’t wait to hear it run!

@darrellsipes4977 4 года назад

L Lll L Mmm l iook lmllp

@darrellsipes4977 4 года назад

Ll.mmmmmmmmmmmmmmmmmmmmmmmmmm

@carlhaber390 4 года назад

Good stuff man! I really dig watching your videos. I can't wait to hear that little beast run. (scream is more like it)

@A7fie98 4 года назад

It might be worth plating the ring, which will give it a harder wearing surface. It would also keep the soft meaning it will be less brittle and less prone to snapping.

@A7fie98 4 года назад

Just did a bit of research and chrome plating offers, high wear resistance, low friction and high corrosion resistance.

@2STROKESTUFFING 4 года назад

I should be able to plate it at home, already got chemicals.

@A7fie98 4 года назад

2STROKE STUFFING it’s probably something worth experimenting with. If you do plate the rings, just do the edge of the ring that contacts the cylinder wall. You don’t want to wear out the ring groove in the piston.