the engine sound is so much cleaner this time, I think the new ignition trigger position is a sucess

Your editing, cinematography, the story... It has come so far. Your achievements speak volumes. One day my friend, you will be on the front page of yewchoobs.

When you look into the camera you can see the madness…. So impressed with what you’re doing!!!😃

Very impressive! Love your ingenuity! Every minute of your videos is pure joy for me. But please, consider using variable ignition timing. The higher ignition advances that work good in high rpm areas could very well work against your engine at low rpm. By that i mean that the center of combustion, or most of your combustion happening, could be before top dead center. You can already see this effect in your test data by looking at your curves at different ignition advances. Also, with high ignition advances you increase your risk of detonation without any gains from it. Its a lose-lose situation at the moment. Edit: Now that i have seen the end of the video, the better engine efficiency from less advanced timing would also help you drive your compressor at lower rpms with a more aggressive gear ratio.

20hp at around 10k is totally nuts.. And the fact that the engine concept works that well in itself. Would be interesting to know what the engine can produce on normal gas. I think you should try different port timing with more blowdown area. Traditional 2 stroke principle should work also here. Could help to bring torque to higher rpm.

I know nothing about most of what's going on here, but I've been watching you're videos for nearly a year now and still completely fascinated by this! Rootin for your success!

Always love a new 2 stroke stuffing video. Always entertaining and educational. Keep pushing the envelope!

Really enjoying your content keep up the great work

You really are stuffing a 2 stroke here aren't you Mr. 2StrokeStuffing? - and i REALLY enjoy watchin' you conquering the problems towards more power. Thanks man!

Loved the video mate, have you thought of using a burst panel on the crankcase to protect against backfire instead of the wastegate? The reason I suggest this is that any boost leaking out of the wastegate is wasted energy, the engine had to compress that air and any leakage is wasted HP. You would solely have to rely on the drive ratio to set the boost pressure though, and if you did have a backfire it would mean replacing the burst panel. Anyway, just a suggestion, loving the progress! keep up the good work!

Love every part of this build! And The camera work is truly impressive :D. Thank you for the great content.

This is so much fun to follow along with you as you experiment with this concept. Thanks for sharing!

I have been following for half a year, great to see the process going so well. Thanks for nice videos, have a great day Emil from Denmak

This is like a franknstein puzzle. So many variable settings, compressor, ignition timing, roterydisk timing. What else I forgot.

Dude! Your editing has come so far! I used to get bored and skip 10-20 seconds and wouldn’t miss anything. No I skip 10 seconds and I’ve missed too much and have to go back lol. Great job on your progress with everything, not just the motor, not just the fabrication, not just the camera angles, lenses, editing…..everything! Always looking forward to the next one 👍🏻

the filming and editing in this episode was phenomenal. the grind of getting used to a new camera is frustrating but the final product in my opinion is worth it

Hey Boss I’ve been following you on my smart TV but I can’t leave any comments on my TV, I’m subscribed and spent most of the day adding like’s too your vids and I bought the VPN under your link. I’m a senior certified Master Motorcycle Technician. I have some books too send you or the ISBN so you can check out more 2 stroke theory. I have been building 2 stroke race engines for over 40 years and had the first EFI 2 stroke in the USA back in 1994, back in my day it was port mapping with formula’s for CCV, BMEP,primary n secondary compression ratios, squish band area. I paid a lot of attention too your crank seal set up as my stroker engines built up so much primary compression the engine would blow the crank seals out but building so much primary compression made so much more torque. I had the first EFI 2 stoke in the country n probably the world. O2 sensor was useless due too the oil and I was building jetski engines with water injected into the exh, so I had too build a map that would not adjust but worked for my porting and first center bleed (bazooka pipe) exhaust. I broke the pillow block’s on my 785cc Kawasaki XIR engine at 138 hp on the water brake dyno so I’m sure it made more power the dyno could not handle it. The BF engine seems too labor and not rev freely. If it was me, I’d ditch the blower and stroke the crank and build an EFI for it. I know it’s experimental but building too much to fast will cause issues. Your combustion efficiency must be really low without an expansion chamber, I looked at the port mapping and doesn’t seem like there’s any room for a power valve. I can send you the books, lotta heavy technical reading but very helpful if you like, i’ll keep watching and hopefully you’ll get the PIP engine stroked, EFI and center bleed pipe and get some usable results. I can’t add pix or I’d show you my EFI set up with dual 50mm throttle body and how I set up the Hall effect sensor. Maybe we can swap emails and I can help you further.

That might be your most complete video. Complete being both production values and 2 stroke innovation. Fantastic. Edge of our seats. Keep it going!!

The supercharger is getting asthmatic and restricting at the higher rpm as it can not flow enough. You need a bigger blower to give more flow for higher rpm.

Excellent progress, and really loving your filming and editing style. Keep up the good work!

I haven’t commented in awhile, but I always give you a like. Just wanted to say that the editing quality and video consistency has been much appreciated

I really admire your commitment and tenacity. Keep up the good work, this is real progress.

Brilliant vid, really enjoying the journey with you !

The progression of this engine is completely addictive! amazing work.

Always get so happy watching your content! Thx!

Your editing is amazing paired up with background music and all . Great work , love your vids

Very nice video you have made again! i enjoyed watching, the music and everything fits together

I usually dislike videos longer than 10 minutes but you manage to make longer videos still worth my time. Good job.

Great video as always Alex! I truly look forward to watching!

Great production quality and choice of music! Keep up the great work

I love that despite this being years, you have never given up Easy is not worth anything!

Your getting there mate and we’re all rooting for ya chap 👍✌️🇬🇧

You look like you are having a good time. All engineers working in a commercial environment want to do what you are doing which is called “organic”. It’s considered old fashioned by some but for many boyish engineers it’s what they thought they were signing up for. Not in a big company. Pays good, rest rooms are clean.

that trigger wheel and the overall dyno chart looks so much better. amazing work as always

Music/audio is awesome on this one! Fits the mood of every scene perfectly

Your graph on progress just went strait up, keep up the good work.

I don't think I've ever been this excited for weekly releases of anything lol. Keep up the good work man!

Exciting video! Beatifully shot and edited too

The wonders of KZfaq! In broad terms, is this channel strictly about "how much power can you get out of a small ICE 2-stroke engine via supercharging"? Is it all just for fun, or is there a specific goal to meet a required outcome, or...? I have always had a fond spot in my heart for 2-stroke motorcycles, having owned a couple Yamaha RD350LC's, and forced induction, with my 1982 CX500Turbo, and up until now strictly in a 50cc size engine, my top fav has always been a 4-stroke. Honda's 1965/66 RC116 GP race bike, an N/A DOHC 8 Valve twin, which put out about 16 horsepower @ 21,500 RPM. That has always seemed to be pretty cool for something done almost 60 years ago, but I had never even *thought* about a 2-stroke being turbo/supercharged! My mind boggles, holy crap! This is awesome to watch, thanks! :D

It’s really starting to come along now mate keep up the good work.

Awesome stuff, looking forward to next time 👍👍👍

i love your stuff,thnx for charing keep up the good work my northern brother

Work and sheds looking good

Sound track on point love the cylinder head shot need more of that view when she's breathing lol so many little things In this vid are sticking out like I can't explain its like watching a movie about my favorite things and I learn and entertain my brain I love it man best channel on the tube keep up the great work 👍

Best video yet. So well made and the results are very promising. Keep it up 🇩🇰

what if 2.2 : 1 is even too high of a gearing? maybe supercharger tries to spin so fast above 10k its producing too much resistance ? when you put the 1 : 1 it seemed to make over 1 bar of boost not far above idle, wich explains why it doesnt wanna rev with the supercharger working that hard at that low of an engine rpm. so maybe with 3 : 1 itll make slightly more power at maybe 12-13k rpm ? worth testing i think

My dear friend, your vids become better and better all the time... they are highly aprechiated. Thanx a bunch.

I really, really like the aspect ratio change you made a few months back. When I'm on my widescreen monitor or on my TV, it just works. The colour change was a little jarring at first, but now, I anticipate not just the content, but the entire presentation. The 🎶 c in this episode is great!!!! Might be biased since I'm about to do Prates of Penzance in May, but sea shanty/pirate theme music is always welcome in my book 😁

great progress! love the music in this one! its like watching "cheff table" but for 2 strokes!

The sea shanty music is great. Love what you do. You have come along way . You are on the edge of greatness.

What a job! Congratulations!

Watching this project with great interest, and hope! Really enjoying the better video presentation and musical background.

Thank you so much as always! I never ask for anything because I think you do an outstanding job teaching while sharing your passion, but I am about to break from my usual and make a respectful request. Next time you have the carbon fiber sheets out, could you please do a quick close up of the strength/fiber-orientation lesson? You make incredible videos, unbelievably awesome engineering advancements, and phenomenal shots (especially now that you’re full time)! Thank you so much for being an excellent educator! Thank you as always, -CY Castor

We used a curved backer plate on reeds we worked with. It reduces the stress concentration when the reed flexes. Didnt see your finished reed cage. Nice work so far

So exciting, cannot wait. Brilliant

Really loving it mate 👌🏼👌🏼

I liked the "Schroedingers Engine" Joke 😂😂😂👍🏼

Even when you're speaking over that big hose, the soundtrack makes it sooo dramatic ;) Keep it up!

Loving this "little" engine, 22hp at around 10k, WOW!, the disappearance of the beard threw me for a bit. This is awesome, keep chasing the dream.

Love your videos! You really are motivating me to start silly projects! One day ill turbo a vintage motorcycle! If i could find a house for sale at a remotely reasonable price that is.

Love ur vids man

best video of this series :D keep up the good work :D

thank you so much for your videos keep up the good woork

I was checking everyday for a new video. Things are getting exciting now!

BRUTE FORCE!!! BOOSSTTTT!! Çant wait to see it run..

Bravo, keep em comin.

Very Exciting!!!

Loving the progress since you went full time on YT. So much per video now.

The beauty of building a new engine is always a fun experience. Build, break, repeat. Build, break, repeat. Build, NUKE aaaand repeat.

Your CNC milling has improved hugely. Great episode

That end threw me off, you look 10 years younger with less beard. Also loving the boost content (:

You have my sub. Awesome. Love this content.

One of the best vids in this series yet! It seems like you really need a different supercharger to get the most out of it. I will say I hate 21:9 aspect ratio though LOL

Now we are talking! Good work!

Always love your video’s😀✅ from holland👊🏻

Impressive! The groundwork is paying off now, development is rapid!

wicked upload as always :D as your not having to get upto resonant rpm for a pipe you dont need to be making power so high as get up and go down in the rev range is going to give you more real world gains than just looking for peak power at x rpm

Well done and it's still running

Exciting content! Keep it up :D

The two stoke god has spoken. Fridays have never been so good.

Still my most awaited subscribed video provider. Crazy but very cool sir.

another great video Keep it up!

A roots supercharger is terrible at higher boost levels. The air rushes back into the chamber and then is pushed out. The force of the pressurized air slamming back into the rotor when the chamber opens creates heat. You can reach a point where the energy needed to create boost is as much as you are getting from the added pressure. There is allot of effort made by manufacturers to make the reverse flow more gradual. More vanes. Twisted vanes and slotted outlets. Ultimately a screw type charger is much more efficient. You might even try making your own compressor with a gear driven turbo compressor wheel. Much more efficient.

Favorite grassroots ICE/motorsports channel on KZfaq. Right on 🤙

This is what we all have been waiting for!

thanks for the great video

The vids are getting slicker and more dramatic 🙌

There is a lot to watch on Netflix etc.. But this i could watch all day! Always a cliffhanger at the end. Like: Next week more boost! Love your videos! 🔥 Greatings from Drammen

ich kann's kaum erwarten, die 30ps zu sehen. und der sound is so geil... danke mann!

Super, supersweet video! What a journey. So cool!!! 🎉 🎉

I love your videos watching from the uk 🇬🇧

sounds good, can't wait for you to strap this into an chassis!

You sir are a GENIUS !!

Pretty easy to calculate the spring constant...if you know the diameter of the wire, the overall length, how the ends are formed, and the number of coils. Just so you know how much you are increasing or decreasing the force.

Great video ,just watched it with a few biker mates here in sussex ,they think your mad ! I think it's genius!

Beautiful lunacy, dam fine engineering. Respect 👌🏻

maybe condensation cooling for the intake air? intercooler with water sprayed onto it while driving so it gets crazy cold ? might gain you a few horses idk just an idea

I watch a lot of dyno videos about turbo charging automotive engines. Usually boost hp curve mimics the n/a curve, there’s just more of it. The same happens when the camshaft is upgraded in n/a vrs boosted. I only say this because I think you should shoot for the same peak hp rpm at full boost. I think the rotary valve timing will effect the hp curve. Obviously the whole 2 stroke vrs 4 stroke in this scenario is the biggest variable, but the rotary valve moving around in the earlier test may have been simulating “variable valve timing” like many automotive engines have.

I’ve been watching you since you started pretty much I wish you would get off the floor you’re gonna pull something yet and you’re getting into some serious serious new frontiers in two-stroke technology it’s fantastic what a mind blowing idea two-stroke Bonneville flats look out but please start standing up have all that stuff raised up so you’re not bending so much and contorting yourself I absolutely love the video man keep up the great work the future is yours

I totally agree that it's at the bottom-end you'll get the biggest gains, as surely the whole concept involves getting away from peaky curves from an engine relying on resonance. but if you can get the bottom of the range making good torque, the top-end will come too (if the blower can supply the air).