Honing Plates make Difference? Most Powerful Two Stroke Ever. 

Was just going to make the samme comment, test the piston with the pressure plates installed.

It seems counter intuitive; you end up with a less round hole in the free state, but once assembled it should be more round than had you honed in the free state.

Exactly. Try the piston with the plates on!

Well they managed to send it to the wrong city over here too...

👍 Lots of comments about this. Of course, I feel kinda stupid...

👍 First thing I'll do next time I'm out there.

@@2STROKESTUFFING and if possible assemble the torque plates in the same sequence as you will assemble the engine , base plate first then head plate .

this.

I was just going to type this

Agree..

Thanks for the heads up!

@@2STROKESTUFFING 👍🏻 Of course you'll have to adjust your tool to be at 0 after three clicks too.

😂👍

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👍😁 I'll let you know if I'm in the area!

@@2STROKESTUFFING Den er god den! Jeg har også en god del elektronikk deler, f.eks. strømforsyninger, nesten alt du kan tenke deg av smådeler, dioder, led, motstandere, transistorer etc, det er bare å i fra! Jeg har også liggende noen Arduinoer, jeg kommer ikke til å bruke alle av dem i mitt prosjekt, så hvis du har ett behov eller bare lyst på en av dem, så er det bare å si i fra! Jeg har en av disse nydelige kortene: store.arduino.cc/arduino-mega-2560-rev3 som jeg for tiden ikke har behov for. For enklest å få ett raskt svar fra meg, mail meg på jobb eposten: janhugo@scaleit.no så får du svar i løpet av dagen. Fortsett med den sinnsykt kule prosjektet du jobber med!!!

Og gratis så klart, men jeg gidder bare å kjøre til Bjørkelangen.. ;) Jeg har bodt på Hemnes, det er ca 45 km for meg å kjøre en vei, og nei, jeg gidder ikke å kjøre så langt for å gi bort deler, men du får alt du vil ha hvis du gidder å kjøre til Bjørkelangen. Lag en liste over hva du har lyst på og så skal jeg se om jeg har alle de delene. Hvis du ser på scaleit.no og søker meg opp på scaleit.no/kontakt-oss og Data og serviceavdelingen så finner du tlf nr mitt, det er bare å ringe!

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😁

Couple of extinguishers, that's all.

@@2STROKESTUFFING better than nothing 💪🏻

Maybe a hose pipe that is handy should you need it?

Will be checked. It's a hair below 50cc.

Would hate it to be 50.1cc or something ,would be gutted for you ,cant wait for the first dyno run really enjoying your progress

No worries, doesn't matter when honning.

@@2STROKESTUFFING many thanks for the reply

😂

😁👍

Would make a great t shirt 😆

I'm usually borderline okayish... There's nothing wrong with it!

@@knuddelwinzig498 would also make a great shirt

Rings are too tight!

Well deserved, it's a great video!

@@2STROKESTUFFING thanks again i cant wait to see this thing BRAP!

@@EricksonMachinePerformance don't be surprised if you see a spike in subscriptions! :D I've found a few gems thanks to 2SS!

@@zxtimmy4 i am very grateful to Alex for sharing my page. That video doubled in view today. I have been building race engine for about 20 years and started my youtube channel a little over a year ago. I have been following 2strokestuffing for around 3 years and it great to see what a guy can do in his garage! I have been super impressed with all the skills he has taught himself!! I cant wait to see how his project comes out.

@@EricksonMachinePerformance Same here mate, been a good few years now. My wife just can't understand why I get so pumped when a notification comes through! He's a wealth of knowledge. It's amazing the guy works in a daycare and does this in his own time at home. Kudos to him for sharing his passion and knowledge with the world. The guy deserves to make a living out of it.

Agree ... that motor rewind will fix the problem ... be sure to replace the bearings!

Huh, I don't think I know of any companies that would have any interest in rebuilding something this small and weird.

@@operator8014 "this small"? Look at RC motors. They are tiny compared to what he has.

@@operator8014 I live in a small town of 20.000 people in central Europe and we have 2 workshops that do this kind of thing just in my small town...

I broke the one I had...

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They do distort, especially with varying cylinder temperature. Specialized "at temperature" honing is done in F1 to combat this since piston to bore clearance needs to be kept very tight

In operation, there would be thermal gradients, with the top inner being hottest. This would be difficult to achieve while honing. Then, you would not want to match that to a cold piston dimension. Piston also hotter at top. Suggest calculating change while hot, and compensating for this while measuring and honing cold.

@@jimdale9187 Modern 4 stroke pistons are generally designed with this expansion in mind, featuring a "cam and barrel" shape that becomes near-cylindrical when in operation. If you grab a cold piston and measure the top land and center of the skirt between the thrust points (usually the stated location to measure for bore clearance) there is a significant difference. If you check cylindricity they're also quite ovaled since the pin bosses affect the distortion of the piston during heating. The design minutia in modern engines is fascinating.

Spot on Jim! Haven't forgotten about your ISO dyno idea/sketch btw(or rather, I just remembered... 😂) I'll get back to you!

@@jimdale9187 i imagine the F1 guys would be using induction heating where they can produce heat in targetted places within the piston. It's done to very accurately harden gear teeth without affecting the entire part.

For me that seems like casting imperfections.

Yep, porosity.

Hp/cc

@@2STROKESTUFFING Nice. I am a great fan of the 2-Stroke, had them in motorcycles, go-carts, Suzuki 4x4 and still have one in an out-board engine.

Clearance in the groove👍 yeah, agree on the set screw issue. When we're past the phase of frequent piston disassembly I could peen over the aluminium behind it to lock it in. Trying to come up with better solutions tho.

@@2STROKESTUFFING just had an idea, probably difficult to pull off but maybe workable. Imagine a 30mm 12 point bolt head with a 25mm 12 point socket cut inside of it, now slice off 1.5mm of it to create a sheet metal lock piece. Make your piston skirt with the bottom of the ring groove, the female threads and then a short 30mm 12 point socket followed by a circlip groove. On the piston it would be piston head, top of ring groove, male threads (with wrist pin hole), then a short 25mm 12 point bolt head. Everything would screw together, then you would put in the lock piece to stop the skirt from backing off, then a circlip will hold the lock up inside the skirt. If the lock piece was made with the inner and outer 12 point surfaces off by 15°, you could adjust your ring clearance by your thread pitch÷24. Of course the dimensions would have to be changed to fit and the lock piece probably has to fit over the connecting rod small end or maybe made in a C shape rather than O shape. Also, a Spirolock might be better than a circlip but possibly a huge pain to install.

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Testing seems to indicate it's no problem, not conclusive yet. Got another cylinder that is being sleeved, + the 3d printed one that is spotless.

Sweet can’t wait to see that when it’s finished

A jealous fool would be my guess.

IKEA

Guy with lame Moped...

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240vdc**

I do the same things despite owning a CNC shop, it's important to recognize when good enough is good enough or you go crazy trying to get everything perfect. Using that energy on more important things lets you get them done.

Yep.

Absolutely! ...I’m personally a bit of a perfectionist in so many ways in life! I’m a top flight windsurfer & I also own a workshop of which I develop stuff, modify cars, bikes & engines. I preserve the limited energy we humans can give for the more critical & important jobs in life & I have lots of success stories as proof. I would have very few success stories if I couldn’t distinguish (or let go) from being that perfectionist all the time! You would just get nothing done!!! 🤠

Bores don't distort inwards with torque plates.

Maybe some day..

Wankel design is comparable to a 4 stroke, as it has separate intake, compression, combustion, and exhaust phases. Stock Wankel exhaust is highly restrictive for noise control. Racing versions use constant diameter tubing exhaust system, merged about 4 feet from the engine. Since it is not a 2 stroke, it does not require heavy return pulse during closing of exhaust port.