Was great to have that synopsis at the start. Only then did I realise I was on the bus, clutching my ticket, with a bit of an idea of where we were going, no clue where we currently were, and only a dim memory of how we got here! Carry on driver! 😂💪
Your attitude to face the problems and find a way to resolve them is so inspiring man... watching your videos helped me a lot in developing my project. Thanks!
For "self threading", something that can help is. If you have two of the threaded part, you can turn one into a makeshift tap by cutting slits/notches in it using an angle grinder. Works much better than just forcing it in. You can also sand/lathe the first few threads down so it is tapered, much like a real tap. This also works fantastic for cleaning up rusty/corroded threads.
Not often have I wished someone success like now. All the hard work put into this project is to good to fail. I love your videos and I always look forward to watch them. Wish you the best of luck Aleks!
While true in short term maybe. I wish that was true always but exhaustion can come from lack of resources, funds, motivation or even mental capacity in long term. Aleks deserves success with all the effort and time he has put in to this project. Looking forward to that time.
The longer the hard times, the greater the feeling of success. Easy isn't worth anything!! This is why i love watching this channel. It is the determination Aleks shows trying to achieve this near impossible goal. Love it
I've been watching you for about a year and just NOW I am becoming aware that there is a purpose to building the most powerful 2 stroke. I've just been enjoying it and the idea of it being built for any reason other than to just build it never once crossed my mind
Have you considered running the rotary valve at half crank speed and making it look like a two bladed fan. It would be more balanced and not cause so much friction. Just a thought.
Might want to check the flatness of your case where the cylinder mounts after forming those threads in with the fitting. I would not be surprised if the aluminum stretched enough to bring that out of flat.
Ah Sisypuhs and his engine. It's admirable no matter how many times he has to start pushing it back up, he doesn't give up. Can't wait for the day Sisypuhs finally rides his engine up up the hill.
Hi, excessive temperature is result of that seal, observed same situation when shaft and bearing got over 100C after few minutes running at 6000RPM, shaft diameter 50mm. Removing seal resulted in something like 40C drop.
@5:43 you say free jazz which reminded me. WHERE'S THE JAZZ MUSIC MAN?! Half the reason I started watching was for the jazz music. That I stayed for the experimental blown 2 stroke. Now we've sort of devolved into mad scientist vibes and I'm too far gone to quit. I have to see this through.
Interesting that you notice that there is a lot of friction in the crank seals, and that only by rotate the crankshaft by hand. Think of the friction you get in the crank, with pressure on the seal-lips and 15000 RPM. A lot of power is lost there. Maybe you should research crank seals of different materials and design and see how much HP the difference is?
Yes I totally agree with you but we need to remember this type of seal has being used on engines for many years and should suffice in this application. A good run-in period lowers internal friction no end plus the correct running temperature.
I like your trial and error approach that keeps the story going on as if the end was behind the corner, knowing that the world most powerful 50cc two stroke is a long way to go though.
Makan til positiv fyr som Alex skal man lete lenge etter. Så mange nedturer og så mange failed tester, men allikevel positiv til å jobbe videre mot målet. Alle andre ville kanskje kastet inn håndkleet for lenge siden. Men vi må finne en måte for å hjelpe han til å huske på å skru på recording når han jobber, for enda en gang, mens jeg skriver dette, så sier han "I forgot to record" 🙈😂 Så mye underholdning, litt komikk, og masse nyttig fag-info! Alex er en fin fyr, og han fortjener vår støtte!
You should buy a boring head for boring precise holes in the mill. Interpolating holes isn’t as accurate as you would think, a lot of the bores will be egg shaped. I made the same mistake on my home made engine.
Just seen a video from Mazda blown twostroke with valves. Had to think about yours with the roteryvalve. But they used like a 4stroke head and had various compression
Good on him, I've seen the accidents they cause without, and in all my years of using grinders, I can't think of one time a guard got in the way that couldn't be fixed by shifting postion slightly.
It's friday here and i'm getting my weekly fix of 2 stroke mayhem....and to top that off...we had a guest appearance in the garage...yes...mr compressor is alive and well.
Fitting is either a ¼-18 NPT or NPS or a British ¼-19. If either tap isn't available, a steel fitting with a few slots cut in it (perpendicular to existing threads) with a Dremel cutoff wheel - or similar - really does work in lieu of a tap, gotta be straight @ start (...looks like you'd be aware to all of that cuz all this isn't your 1st Sapporo out of the 12 pack; more for those that are nursin that 1st one, metaphorically speaking.
"wrong angles...😁" this remember me to taken a inspection at a heli-turbine ...only few "little" steps to optimizing the fuel and air channels brings many more 🐎 Infill is the most important side , exhaust is almost noises
Have you thought to look at labyrinth seals. There is no contact, just a convoluted path for escaping pressure, which causes the gas to drop in pressure at every stage, reducing how much it can leak.
I admire your skills and tenacity, I would have given up aq long time ago. I too have built my own engines to my own designs but these were all Four stroke. I have CNC machining capabilities but when it comes to making accurate bores I always use a boring head mounted in the spindle and final machine to size. This eliminates any possible ovality of the hole due to backlash in the X & Y planes of the machine. Judging from the error in roundness of the hole you re-machined it looked to me that backlash was the cause of it. Good luck with the project.
You are truly experimenting with new ideas. Your always such a pleasure to watch. Everything that you do successfully or not is gained knowledge and another step towards “the most powerful two stroke ever.” 🖖🏼👽
@@marcelpursche5339they actually don’t use uniflow port scavenging like the Detroit, it uses an intake and exhaust valve just timed cleverly to scavenge the piston. It’s weird idk how well it would work in application but I’m curious to see how it turns out
@@PotatoesAssistant Oh I found the schema of the engine. Pretty weird design. Looks like a regular turbo-charged 4 stroke but with a 2 stroke power cycle. I hope they actually build a working engine. Would be interesting to see it working.
@@davidgierke7582 I don't think Mazda is trying to build the 2 stroke with most power per cc but rather with the best efficiency and emissions. A big part for that is not burning the lubrication oil, running on self-ignition for low-rpms and exhaust gas recirculation. It will probably have an ok power per cc ratio but nothing out of ordinary.
I can't explain in words how much I want you to succeed, or how much I wish I could have one of your crazy engines slapped on my Derbi Senda R -99. Me going against the norm I've been trying to get my two stroke to get some more bottom end power rather than the high rpm effects, but as we all know it's a losing battle. Still, it's fun to experiment!
Methanol + high compression + timing lowers the RPM of peak power while also raising the height of the peak. Have you tried that yet? I've got a video going over my carb build and testing/dyno results if you want to see.
@@theshippingcontainergarage That sounds like a good nudge in the right direction to try, though I don't have methanol available. E85 is probably the only viable option for me economically, probably not as effective but maybe it'd be something atleast? The main thing I've been trying has been the exhaust and intake, but on a 50cc it's been hard to notice any big differences. My measure of success has been getting the moped to run ok in 6th gear on flat surface trying to keep a steady 30km/h, but there's not much power for anything else haha! Will check the video!
@@Seriouskai E85 is alright, not nearly as much of a power bump though. Something like 3 to 5% more HP. The only problem with pump e85 from the gas station is that it has a range of ethanol content. Something like 50% to 90%. I don't know the exact number. It will be impossible to tune the carb for anything other than one batch of fuel since the next time you fill up your cans it will be a different concentration. Unless you are buying a race fuel ethanol like an e98 in a can with a guaranteed ethanol content. At that point just make the jump to Methanol. Where I'm at it's really not too expensive compared to most leaded race fuels, I buy the generic methanols, no need to buy expensive VP racing methanol etc. Call around your area see what you can find from race shops. You won't use THAT much fuel on only 50cc haha. You could buy a smoked KTM 50 SX cylinder, preferably 2009 or newer and copy the geometry from the cylinders/bottom end. Those bikes make stupid amounts of power for what they are.
@@theshippingcontainergarage Yeah and I keep hearing bad things about the fuel here in Sweden as well, so I highly doubt it's purity and being consistent. The big problem I have is money for all the fun stuff though, oh boy if I had more cash I would do so many things since I have all the time in the world. I haven't done any major changes to the moped either since I need it as a daily runner for the moment, basically my ideal goal on it would be something that tops out at about 70km/h and has the strength to actually get there steady, but not make so much noise every person outside would stare at me going by. Right now it's fine up to 60 or so depending on the mood of the moped, but that 6th gear is hard.
I keep reading your declaration concerning how a two-stroke engine's peak horsepower rpm is lowered by using methanol (over Gasoline, I presume), high compression and timing (earlier, I presume) to accomplish this feat. Why do you think this is happening?. @@theshippingcontainergarage
On the brute force design, would it be possible to integrate the compressed fuel/air after the crankcase? Most people try to do forced induction before the crankcase, but I’ve never seen someone do the forced induction between the case and the transfers 🤔
15:20 I have been thinking about making a non friction variator for a long time now that would in theory slot in well there. Unfortunate that i dont have a prototype yet, only a bunch of sketching and not even fully complete. I have too big productivity issues.
Great journey summary at the beginning. I've followed you for years and forgotten about all of the stuff you've done. Next time, can you give us a reminder about the goal of the most powerful 50cc engine in the world please. Is it Bonneville again? Thx!
It's just always trying to reject the rotary valve, the little thing just wants to sing 📯 Miss the nostalgia of the heater sometimes but the videography evolution is quite impressive.
I'm sure it must have been discussed before - but what's the impact of the significant intertia/imbalance of that rotary valve? ideally, should the crankshaft webs be 'adjusted' to compensate?
I feel the crankshaft "balance factor" is quite low as Alex has suffered with severe vibration problems going back to the SPX era 8 years ago when he tried various cranks to resolve this problem without success. Yes, it would be nice to balance the crank and disc valve together but Alex doesn't have that luxury ATM. I feel now the carb is mounted horizontally the fuel frothing problems induced by vibration will be tolerable with no fuel starvation as previous. I would love to see the change in the crank balance factor with the alloy crank stuffers removed then replaced with much lighter cork. Better crank balance has many benefits as we know.
Great stuff(ing)! Have you thought about increasing the oil channels of the rotary housing all to the outer diameter? You faced heat issues in the inner part with the absence of channels, now the outer part which is reving with the highest velocitiy wont get oil/gasoline cooling. Keep on mate!
i was kind of wondering if the rotary valve shape could be altered to initiate flow direction instead of just windowed open and closed. if that would help charge the cylinder in a way that would help harmonics with the pressure pulses
We’re going to have to start calling you Keyser Söze. “And just like that poof he was gone” ! Hope you find the time to continue and get your head space back!
Man... Im a new content creator and I aspire to be as creative and talented as you are. I do custom work and I am so impressed every time I see your work. Keep your head up my friend!
I imagine you have studied in depth (and are perhaps exceeding in output) the karting engines of the Italians. Some of their old 100cc rotary valve engines had a piston life of 20 minutes
Have you seen @mazda s new 2-stroke engine design? When I was watching the tech breakdown I immediately thought of your Brute force engine and wondered if the intake porting scheme they use could be applied.
Did the crankcase stuffer go back in when you put the cylinder on? The video showed it missing, but you might have taken the cylinder back off to set squish and then inserted it?
Was great to have that synopsis at the start. Only then did I realise I was on the bus, clutching my ticket, with a bit of an idea of where we were going, no clue where we currently were, and only a dim memory of how we got here! Carry on driver! 😂💪
Your attitude to face the problems and find a way to resolve them is so inspiring man... watching your videos helped me a lot in developing my project. Thanks!
For "self threading", something that can help is.
If you have two of the threaded part, you can turn one into a makeshift tap by cutting slits/notches in it using an angle grinder. Works much better than just forcing it in.
You can also sand/lathe the first few threads down so it is tapered, much like a real tap.
This also works fantastic for cleaning up rusty/corroded threads.
If the Aluminum is soft enough, then forcing it will create a stronger thread, just like a rolling tap will.
Not often have I wished someone success like now. All the hard work put into this project is to good to fail. I love your videos and I always look forward to watch them. Wish you the best of luck Aleks!
There is NO SUCH THING AS "FAIL"...
You just learn another way witch will not work...
While true in short term maybe. I wish that was true always but exhaustion can come from lack of resources, funds, motivation or even mental capacity in long term. Aleks deserves success with all the effort and time he has put in to this project. Looking forward to that time.
The longer the hard times, the greater the feeling of success. Easy isn't worth anything!! This is why i love watching this channel. It is the determination Aleks shows trying to achieve this near impossible goal. Love it
So pleased to see that your confidence has returned! Your onto a winner!
I've been watching you for about a year and just NOW I am becoming aware that there is a purpose to building the most powerful 2 stroke. I've just been enjoying it and the idea of it being built for any reason other than to just build it never once crossed my mind
You keep it real. I like when you see real life, real obstacles and real solutions.
Will never have a two stroke bike, but keep watching.
Have you considered running the rotary valve at half crank speed and making it look like a two bladed fan. It would be more balanced and not cause so much friction. Just a thought.
Really good idea
Reply, just for a bump
Might want to check the flatness of your case where the cylinder mounts after forming those threads in with the fitting. I would not be surprised if the aluminum stretched enough to bring that out of flat.
Man, I really miss that landspeed bike era.
what do you miss?
Stay motivated, one problem at a time. You’re doing it! 🎉
"This idea is not dead" - Good, cause easy is not worth anything!
Ah Sisypuhs and his engine. It's admirable no matter how many times he has to start pushing it back up, he doesn't give up. Can't wait for the day Sisypuhs finally rides his engine up up the hill.
Hi, excessive temperature is result of that seal, observed same situation when shaft and bearing got over 100C after few minutes running at 6000RPM, shaft diameter 50mm. Removing seal resulted in something like 40C drop.
@5:43 you say free jazz which reminded me. WHERE'S THE JAZZ MUSIC MAN?! Half the reason I started watching was for the jazz music. That I stayed for the experimental blown 2 stroke. Now we've sort of devolved into mad scientist vibes and I'm too far gone to quit. I have to see this through.
Do dial indicator check for runout after the crankcase is assembled.
I remember some of the older videos. You have earned a lot since then and learning more all the time.
Interesting that you notice that there is a lot of friction in the crank seals, and that only by rotate the crankshaft by hand.
Think of the friction you get in the crank, with pressure on the seal-lips and 15000 RPM.
A lot of power is lost there.
Maybe you should research crank seals of different materials and design and see how much HP the difference is?
Yes I totally agree with you but we need to remember this type of seal has being used on engines for many years and should suffice in this application.
A good run-in period lowers internal friction no end plus the correct running temperature.
Ooo this is exciting!!
Can't wait to hear that little engine run!
He should invite to a "shop tour" for patreons, so thst we can experience the sound in real. The mic never gets the true sound of a revving 2-stroke 🥰
I like your trial and error approach that keeps the story going on as if the end was behind the corner, knowing that the world most powerful 50cc two stroke is a long way to go though.
Love this stuff . My chainsaw is 50cc . I would love to get 8 hp put of it, let alone 23 hp
"This time"
Går nok bra!
Underholdene og interessant er det uansett! Takk for dine videoer opp igjennom årene.
Makan til positiv fyr som Alex skal man lete lenge etter. Så mange nedturer og så mange failed tester, men allikevel positiv til å jobbe videre mot målet. Alle andre ville kanskje kastet inn håndkleet for lenge siden.
Men vi må finne en måte for å hjelpe han til å huske på å skru på recording når han jobber, for enda en gang, mens jeg skriver dette, så sier han "I forgot to record" 🙈😂
Så mye underholdning, litt komikk, og masse nyttig fag-info!
Alex er en fin fyr, og han fortjener vår støtte!
@@Norwegian71 Det var fint sagt. tommelopp!
@@Norwegian71 Følte meg litt inspirert selv egentlig 🙂
knackebrod
Klingon?
Gosh damn that engine looks good in the video picture
I cant wait for results.
I wish it will run perfectly well.
Fantastic!! I can't wait to see it run. You've put so much hard work into this wee beast. I look forward to seeing you back at bonneville one day.
You should buy a boring head for boring precise holes in the mill.
Interpolating holes isn’t as accurate as you would think, a lot of the bores will be egg shaped. I made the same mistake on my home made engine.
👍 I've got one, should put it to use.
Your a class act keep at it genius is how often you strive from failure nothing fails if you keep focusing on fixing / re inventing keep at it 🏴
I do castings for aerospace/dod. Super cool to see it being done on a small scale with the burn out method successfully.
that looks like BSP on that coupling a tapered thread
Great that you have found the issue with the seal, looking forward to Friday if this solved the overheating problem.
This guy...is purely nuts. And I love him for it. Keep up the good work...not many left out there like u! All my respect...
It's ALIVE! Oh, wait, I'm getting ahead of myself...
Only one thumbs up for your comment, thats a good description of Alex's luck.
The winning engines from Morbidelli (Jörg Möller!) had openimg time of 276 grades in the rotary valve, not just 180.
It might look like 180 but don’t forget to add the width of the port, in degrees, to your calculation
Just seen a video from Mazda blown twostroke with valves. Had to think about yours with the roteryvalve. But they used like a 4stroke head and had various compression
Thats a mythical beast on TH-cam… an angle grinder with the disc guard still in place 👏
I'm sure it's just for the camera 😂
Good on him, I've seen the accidents they cause without, and in all my years of using grinders, I can't think of one time a guard got in the way that couldn't be fixed by shifting postion slightly.
Have not missed a single episode in years, and this one was really great! Nice synopsis and you sound great and inspired. Way to go :-)
Old motor has spx style cilinder right? Or I remember wrong 😅
Looks absolutely menacing! Can't wait to hear Pip sing again!
👍 thanks again , can't wait till Friday
It's friday here and i'm getting my weekly fix of 2 stroke mayhem....and to top that off...we had a guest appearance in the garage...yes...mr compressor is alive and well.
LEAK TEST before installing in frame this time
Fitting is either a ¼-18 NPT or NPS or a British ¼-19. If either tap isn't available, a steel fitting with a few slots cut in it (perpendicular to existing threads) with a Dremel cutoff wheel - or similar - really does work in lieu of a tap, gotta be straight @ start (...looks like you'd be aware to all of that cuz all this isn't your 1st Sapporo out of the 12 pack; more for those that are nursin that 1st one, metaphorically speaking.
"wrong angles...😁" this remember me to taken a inspection at a heli-turbine ...only few "little" steps to optimizing the fuel and air channels brings many more 🐎
Infill is the most important side , exhaust is almost noises
Dowels on the cylinder wound be a good idea to keep things aligned with the crank/case and piston
I just found your channel last night so awesome Ive learned more watching your videos then Ive known all my life Thanks
Have you thought to look at labyrinth seals. There is no contact, just a convoluted path for escaping pressure, which causes the gas to drop in pressure at every stage, reducing how much it can leak.
That really came together nice. Can't wait for the results.
I thought today is friday. Apparently not haha.. this was a surprise
i dont know shit about engines, i dont even care for cars.. but somehow, some way- i keep coming back every update on this, you rock man.
Can't wait. Your videos are the highlight of my watching week.
Hail the algorithm!
I admire your skills and tenacity, I would have given up aq long time ago. I too have built my own engines to my own designs but these were all Four stroke.
I have CNC machining capabilities but when it comes to making accurate bores I always use a boring head mounted in the spindle and final machine to size. This eliminates any possible ovality of the hole due to backlash in the X & Y planes of the machine. Judging from the error in roundness of the hole you re-machined it looked to me that backlash was the cause of it.
Good luck with the project.
How can you possibly fail when you are so sincere?
You are truly experimenting with new ideas. Your always such a pleasure to watch. Everything that you do successfully or not is gained knowledge and another step towards “the most powerful two stroke ever.” 🖖🏼👽
Cant wait to see it running on Friday without heating up the rotary valve. Fingers crossed.
Nice recap and looking good. Fingers crossed for Friday 🤞
Looking forward to your next video Dave.
The dream team, you and Alex!
@@malcrandall1309cheers Malc, hopefully the next vid will be out the end of next week
Thanks for the short recab 👍
If you delete the crank seal from the rotary side isn't crankcase pressure going to leak between the rotary valve and housing clearance?
Hi mate I've been watching your builds for a few yrs pall
Your a wizard of 2T tuning mate good stuff
Can you make the rotary valves thicker so they are tougher ?
The thicker they are, the heavier they are thus more stress and vibration.
have you seen the new patent from mazda..... 2 stroke over head valved and blown motor ?
Sounds like a 2 stroke Detroit Diesel engine? 😅
@@marcelpursche5339they actually don’t use uniflow port scavenging like the Detroit, it uses an intake and exhaust valve just timed cleverly to scavenge the piston. It’s weird idk how well it would work in application but I’m curious to see how it turns out
@@PotatoesAssistant Oh I found the schema of the engine. Pretty weird design. Looks like a regular turbo-charged 4 stroke but with a 2 stroke power cycle. I hope they actually build a working engine. Would be interesting to see it working.
What every 2-stroke engine needs-rpm-limiting valve springs.
@@davidgierke7582 I don't think Mazda is trying to build the 2 stroke with most power per cc but rather with the best efficiency and emissions. A big part for that is not burning the lubrication oil, running on self-ignition for low-rpms and exhaust gas recirculation. It will probably have an ok power per cc ratio but nothing out of ordinary.
Another very interesting video. Many thanks for the summary of work so far. Much appreciated.
At this stage, i reckon i could just about reassemble this engine.
What a STUFFING good episode, STUFFED full of old good bit's 👍😁
I can't explain in words how much I want you to succeed, or how much I wish I could have one of your crazy engines slapped on my Derbi Senda R -99. Me going against the norm I've been trying to get my two stroke to get some more bottom end power rather than the high rpm effects, but as we all know it's a losing battle. Still, it's fun to experiment!
Methanol + high compression + timing lowers the RPM of peak power while also raising the height of the peak. Have you tried that yet? I've got a video going over my carb build and testing/dyno results if you want to see.
@@theshippingcontainergarage That sounds like a good nudge in the right direction to try, though I don't have methanol available. E85 is probably the only viable option for me economically, probably not as effective but maybe it'd be something atleast?
The main thing I've been trying has been the exhaust and intake, but on a 50cc it's been hard to notice any big differences. My measure of success has been getting the moped to run ok in 6th gear on flat surface trying to keep a steady 30km/h, but there's not much power for anything else haha!
Will check the video!
@@Seriouskai E85 is alright, not nearly as much of a power bump though. Something like 3 to 5% more HP. The only problem with pump e85 from the gas station is that it has a range of ethanol content. Something like 50% to 90%. I don't know the exact number. It will be impossible to tune the carb for anything other than one batch of fuel since the next time you fill up your cans it will be a different concentration. Unless you are buying a race fuel ethanol like an e98 in a can with a guaranteed ethanol content. At that point just make the jump to Methanol. Where I'm at it's really not too expensive compared to most leaded race fuels, I buy the generic methanols, no need to buy expensive VP racing methanol etc. Call around your area see what you can find from race shops. You won't use THAT much fuel on only 50cc haha.
You could buy a smoked KTM 50 SX cylinder, preferably 2009 or newer and copy the geometry from the cylinders/bottom end. Those bikes make stupid amounts of power for what they are.
@@theshippingcontainergarage Yeah and I keep hearing bad things about the fuel here in Sweden as well, so I highly doubt it's purity and being consistent. The big problem I have is money for all the fun stuff though, oh boy if I had more cash I would do so many things since I have all the time in the world.
I haven't done any major changes to the moped either since I need it as a daily runner for the moment, basically my ideal goal on it would be something that tops out at about 70km/h and has the strength to actually get there steady, but not make so much noise every person outside would stare at me going by. Right now it's fine up to 60 or so depending on the mood of the moped, but that 6th gear is hard.
I keep reading your declaration concerning how a two-stroke engine's peak horsepower rpm is lowered by using methanol (over Gasoline, I presume), high compression and timing (earlier, I presume) to accomplish this feat. Why do you think this is happening?. @@theshippingcontainergarage
Love the improvements you've made to the engine. Its really looking good. I love the geometry you added to the rotary valve for oil passages.
On the brute force design, would it be possible to integrate the compressed fuel/air after the crankcase? Most people try to do forced induction before the crankcase, but I’ve never seen someone do the forced induction between the case and the transfers 🤔
I've only got a chance to watch this episode today (Saturday), I hope everything went well with the first startup, cheers from Australia.
15:20 I have been thinking about making a non friction variator for a long time now that would in theory slot in well there. Unfortunate that i dont have a prototype yet, only a bunch of sketching and not even fully complete. I have too big productivity issues.
Great journey summary at the beginning. I've followed you for years and forgotten about all of the stuff you've done. Next time, can you give us a reminder about the goal of the most powerful 50cc engine in the world please. Is it Bonneville again? Thx!
It's just always trying to reject the rotary valve, the little thing just wants to sing 📯
Miss the nostalgia of the heater sometimes but the videography evolution is quite impressive.
Thanks for the explanation on the rotary verse reed!
I'm sure it must have been discussed before - but what's the impact of the significant intertia/imbalance of that rotary valve? ideally, should the crankshaft webs be 'adjusted' to compensate?
I feel the crankshaft "balance factor" is quite low as Alex has suffered with severe vibration problems going back to the SPX era 8 years ago when he tried various cranks to resolve this problem without success.
Yes, it would be nice to balance the crank and disc valve together but Alex doesn't have that luxury ATM.
I feel now the carb is mounted horizontally the fuel frothing problems induced by vibration will be tolerable with no fuel starvation as previous.
I would love to see the change in the crank balance factor with the alloy crank stuffers removed then replaced with much lighter cork.
Better crank balance has many benefits as we know.
Great stuff(ing)!
Have you thought about increasing the oil channels of the rotary housing all to the outer diameter? You faced heat issues in the inner part with the absence of channels, now the outer part which is reving with the highest velocitiy wont get oil/gasoline cooling. Keep on mate!
Nice! Why not experimenting with double intake, mixed lamellar and rotary valve would be a first
if function follows form that'll be the best yet cause this one looks the best, it at least looks like " the worlds most pwerful 2 stroke"
i was kind of wondering if the rotary valve shape could be altered to initiate flow direction instead of just windowed open and closed. if that would help charge the cylinder in a way that would help harmonics with the pressure pulses
I some how look forward to the invertible v 2, where all the things you learned is incorporated 👍👍
Have you ever considered a multi cylinder 50cc?
We’re going to have to start calling you Keyser Söze. “And just like that poof he was gone” !
Hope you find the time to continue and get your head space back!
Well looks much more professional then before.
Yes it really does look the part now especially the disc valve and newly designed drive.
Have you ever mentioned making diamond whetstones? tell me how to do it?
maybe look into the mechanical seals used in water pumps, if this not works either. gl tho..
I'm in Arkansas. You are getting there you just haven't gotten there yet!
Hope it "roars" this time after all your work! Best of luck!
By the way, wasn't the crankcase assembled without gasket/sealant? Maybe I missed it.
Soon we will hear the sweet sounds of 2-stroke revs! :)
Have you looked into sleeve valve engines ?
Wait, did I just see you use a GSPORT BMX freestyle peg as a seal press?? I've used a bicycle peg as a press tool for many years haha
Beaten paths are for beaten men, Eric Johnson:
What a great effort and success to see it assembled! Have a Schwarzwälder-Kirschtorte and a steak perhaps for Your loved ones!
The brute force was Awesome- I was a little disappointed when you dropped that👍🏻
Thanks! Not dead, just on hold. Got some ideas I want to implement.
Man... Im a new content creator and I aspire to be as creative and talented as you are. I do custom work and I am so impressed every time I see your work. Keep your head up my friend!
Also what cilinder bolt patern you use? Maybe test the bottom of engine with a different cilinder? A Bad case can ruin the best cilinder!
I imagine you have studied in depth (and are perhaps exceeding in output) the karting engines of the Italians. Some of their old 100cc rotary valve engines had a piston life of 20 minutes
Have you seen @mazda s new 2-stroke engine design? When I was watching the tech breakdown I immediately thought of your Brute force engine and wondered if the intake porting scheme they use could be applied.
You should be sponsored by JB welding😉 Keep up the good work, you will get there👍
Did the crankcase stuffer go back in when you put the cylinder on? The video showed it missing, but you might have taken the cylinder back off to set squish and then inserted it?
It was in there, but not tightened yet and sat a bit below the surface.
Do you lubricate the crank seal and rotary valve during assembly? If not, it might be the source of your friction.
Is it possible to use a labyrinth seal on the crankshaft? That would cut friction to zero there...
Engine sealer on the rotary valve?
On the mating surfaces, not the valve itself.