Two Stroke 3,5 HP to 28 HP in 7 minutes

I build this Simson engine for the tunerbattle. Some freaks meet at the dyno and show their skills.

[@fpvflightfootage7869]

I can’t believe you did all this in 7 minutes. Unbelievable

[@vespass225]

Takes skills, for sure....

[@JanSchaeffer]

the time of reallife hyperlapse is coming! :)

[@JanSchaeffer]

Next time arround i will try to solve it in 6 😂🙏🏻

[@carlosgirao1106]

😂😂😂😂😂

[@cliveswabs9365]

can u do my RG80?

[@danlaporta6375]

Butterfly in middle of expansion = awesome solution. Thanks

[@JanSchaeffer]

No problem.

[@JB61616]

What is the purpose of the butterfly valve?

[@JanSchaeffer]

@@JB61616 to "control" the exhaust waves

[@fidelcatsro6948]

Langtuning power valve system LPVS 😂😂

[@RATADATUAVELHA]

@@JB61616 in 2 stroke engines, the later the exhaust gases go out --> the better. 4 stroke is the opposite.

[@jmrides777]

3.5hp to 28hp in 7 minutes for professionals. 3.5hp to 28hp in 7 years for the average Joe!

[@KhaoticKalm]

I was taking inventory: 1. Lathe 2. Welder 3. 10-20 practice motors Oh… and skill, I have to get lots and lots of skill

[@AEY-Centinal]

Herr Schäfer Kompliment. Für mich sind Sie eine Ikone und habe mega Bock auf 2 Takter. Fahre seit ich klein bin Moped Simson egal welche Hauptsache. Habe es nun soweit getrieben das ich Hobbymäßig 2 Taktrennen mitfahre. Classic TT's usw. Honda NSR125 Motor. Durch hier und da können da auch gern über 30 Ps rausspringen. Deine Videos sind geil mach weiter so.

[@JanSchaeffer]

Vielen Dank!

[@hotrodZack1948]

Gas welding, that’s something you dont see much of nowadays.

[@frankandersson7112]

As an district heating-welder (in Sweden) it's almost A daily thing for me. At least when welding pipes smaller than 300mm in diameter but you are right, it is just TIG-TIG-TIG nowadays....

[@tungstengrinder9485]

​@@frankandersson7112 Ist aber auch 👍👍👍 wig tic 😉 schnell sauber aber Wind anfällig 😉

[@paulwhite7475]

​@@frankandersson7112Gas welding its like Tig inly for Men 😂

[@AlteredCarbons]

cool video man, love seeing these 2 stokes working so hard. also glad to see it wasn't a click bait title. "easily make 28 hp!" then show what you had to do lol. then you see a lathe and mill even from harbor freight thats out of reach for most

[@nils2tr]

Guter Zusammenschnitt! Ich mag dein Schnittstil 👍

[@JanSchaeffer]

Ich danke!

[@WilCoxon007]

just a couple of bolt on mods, easy.

[@JanSchaeffer]

yeah 🤣🤣

[@Majski900R]

Lol, you're funny guy 🤡

[@extec101]

twostrokestuffing should see this engine.

[@Daniel_kruger]

Yeah, but he does only 50cc...

[@extec101]

@@Daniel_kruger what i mean is how this engine is built and what power it produce in that Alex have over built his engines with alot of parasitic loss and more complicated then a german engineer. well it ned to be scaled down to 50cc.

[@marcelpursche5339]

He visited Lang Tuning some time ago and also got some parts from them 😄

[@extec101]

@@marcelpursche5339 that i remember and feel exited to see what will come from those parts.

[@JanSchaeffer]

@@marcelpursche5339 for example our Simtunol twostroke oil :)

[@milankralowetz3391]

Hallo Leute. Alles klar soweit? Schöner Zusammenschnitt.. Einfach herrlich zu Sehn was mit Plan und geilem Werkzeug möglich ist! Handwerklich 1A 👍 Grüße aus'm Saarland

[@JanSchaeffer]

danke dir und schöne (verspätete) Grüße zurück :)

[@MichaelForrestChnl]

the pipes butterfly valve causes the return stuffing wave to return earlier for reving higher, more than it would normally be able to allow. But that early wave causes the positive return wave to overlap the negative wave which cancels them out where they overlap which is bad for intake.

[@tribalbc]

Wow you have some tools and some skills there 👍

[@JanSchaeffer]

Thanks a lot.

[@idonotwantahandle2]

German engineering. An impressive mix of knowledge and skills. I never thought gas welding could match TIG. Very impressive.

[@schnuffischulz]

Mir war vorher gar nicht bewusst wie man die Bandbreite mit der Drosselklappe beeinflussen kann. Geiler Scheiss. Gerne mehr davon 🤘

[@aeroxtom8123]

Wat für nh drosselklappe ?

[@nichtsneuesausmbruch5550]

@@aeroxtom8123 die im Auspuff

[@Joschi746]

Im Auspuff ​@@aeroxtom8123

[@JanSchaeffer]

Die im Auspuff.

[@иванпетров-в1ы1я]

@@JanSchaeffer дроссельная заслонка на выхлопе чтобы сделать 2 режима объемной эффективности. Это японское изобретение. В 1 положении дроссельной заслонки - объемная эффективность высокая на низких оборотах двигателя. В 2 положении дроссельной заслонки объемная эффективность высокая на высоких оборотах двигателя. Все написано в английской книге Методы проектирования коллекторов двигателей, авторы Дейсмонд Винтербоне и Ричард Пеарсон.

[@fanatbmx]

Nice job, I like such kind of tuning

[@JanSchaeffer]

we too !

[@stwayne9121]

And--viola! Just like that you have increased the motor's output by a factor of nine times! Most of which, I have no idea what he was doing. Back in the 70's I raced a Suzuki 90 with a 100cc "Git Kit" that it took it from a stock 8 HP, to 14 something. Can't imagine what I would have done with 126 HP!

[@diggy-d8w]

What are these, "Simpson" engines..... like something we can buy to build ? I subb'd b/c of how impressive this was and to at least figure out WTF it's all about? I'd love to craft a small motor for a bicycle & this is where I'm starting. peace

[@alcord2540]

It might be a 7minute video but many hours of skilled work went into this.

[@dhavidlee]

If y'all see now and want to upgrade your 2 stroke but limited budget i suggest first carbs and chamber exhaust, hope it's help too

[@JanSchaeffer]

thats a good Idea.

[@cobre7717]

Don't forget to test for air leak around crankcase seals

[@congerthomas1812]

Cool, straight gas with moth balls works too!!

[@TheHypnotstCollector]

minute 3:53, the main jet is a sewer pipe. Looks like one of the four main jets in a Holly DP on my 350Chevy. It's 5700cc revs to 8000rpm. It's about 115 Times Larger ...but this 50cc mini monster uses a main jet like a 5700cc engine

[@jmt2727]

Very nice work! Which cilinder brand is this?

[@MaxStammberger]

Hi, ich habe mir letztens einen 50er Sport bei euch gekaut und ihn dann bei einen freund eingebaut. Danach bin ich wieder nach hause gefahren(ca. 5km und danach nicht mehr), und mir ist eingefallen das ich den Zylinder nicht nach rechts gedreht. meine frage wäre jetzt ob ich ihn noch nach rechts drehen kann oder es lieber lassen soll. PS wieder mal ein cooles Video. weiter so

[@JanSchaeffer]

Nein, bitte lass den Zylinder jetzt so.

[@exsytxbix]

@@JanSchaeffer um was geht es hier genau?😅

[@KevLo94]

@@exsytxbix der Zylinder hat spiel bei den stehbolzen. Sollte man jetzt mal den Zylinder demontieren, kann man durch das verdrehen nach rechts immer wieder die genaue Position von Zylinder und Kolben herstellen.

[@JanSchaeffer]

Exakt!

[@MaxStammberger]

@@JanSchaeffer OK danke

[@raycorbb]

there is no other word. craftsman Great job

[@JanSchaeffer]

thank you very much!

[@fidelcatsro6948]

Wish i had sent in my yamaha 115cc 2 stroke engine to him for overhaul

[@JanSchaeffer]

When i tune a single engine it is often to much money for a costumer.

[@fidelcatsro6948]

@@JanSchaeffer hahahaa

[@oldgeorg9347]

Der deutsche Allen Millyard. Absolut klasse und meisterlich! 😎😎

[@TROdesigns]

He needs to use a jacksaw to be a true Millyard!

[@JanSchaeffer]

haha danke 🤩

[@msromike123]

When the zombies attack on want you in my compound.

[@lordsiringo]

Geiler Zweitaktscheiß !!!!!! 😋

[@JanSchaeffer]

Sehr gut!

[@matejdulansky5269]

Amazing job! What cylinder is that with 44mm of stroke? TPR 86?

[@Kattenbief]

I think it's a ktm sx65 cylinder, stroke is 40.8. That's why he turned down the bottom of the cylinder and made the cylinder head deeper, to adjust for the longer stroke.

[@JanSchaeffer]

Exakt, thank you!

[@HSuomi]

Is this real? 😵‍💫

[@DarkShadowAllround]

Yes it is

[@JanSchaeffer]

Why not? Simson got really stable parts.

[@exsytxbix]

There are long videos to this on his channel. Check it out👍

[@HSuomi]

@@JanSchaeffer Seems so. Very nice results. Is that 28hp rear wheel power or calculated crankshaft power?

[@janschaffer3594]

Rear wheel is about 26,5 HP.

[@peterjohn3180]

If you use a cutting disc to separate the cases after welding etc how did you compensate for the missing metal to reseal the halves? Also does the molten metal stick ok when you poured it into the outside of the cold cases?

[@janschaffer3594]

I bring in s little distance before welding. I think about 8 millimeters.

[@JanSchaeffer]

When i weld it, i use some nuts about 8mm between the cases.

[@att49356]

Hi LangTuning, awesome work! What are the settings on your Mig welder and what wire/gas did you use? I would like to do the same but I'm way too afraid to warp the engine casings. Did you do additional work to avoid that, like using a steel plate between the casings and/or machining the joint faces of the two half casings?

[@JanSchaeffer]

A lot of questions . Please look at another answer under the video. I avoid problems with stops while welding every 5 minutes. Also a machine the cases after welding.

[@TheRealHonk]

Kanäle/Fenster von Hand gefräst, wie geil ist das denn bitte?!😱😍🤘

[@Willikr]

Ein absolut geiler raw zusammenschnitt!👍🏻 Frage: wo hast du die kleine Lampe her die du beim Gehäuse Handfräsen genommen hast? Kg

[@pfeyusvg3744]

Kriegst bei ike als nachtischlampe

[@JanSchaeffer]

Schwedischer Möbelhersteller.

[@Willikr]

@@JanSchaeffer Firma dankt.👋🏻

[@peterlustig457]

genau die hab ich auch an der Drehe!

[@ernestozuffada5069]

Complimenti! Bel lavoro! Proviamo anche il controcono allungabile? Come i motoscafi. 👍👍👍👍

[@JanSchaeffer]

we have one time in the year the "tunerbattle" by langtuning. on that time many 2 stroke tuners coem to visit use an show there tuningskills. Some of them already tried that extendable counter cone an it worked very well :)

[@smokinamby]

What mods did you do? I can see: 1. jug upgrade? 2. Open transfers 3. Custom carb placement? Can you elaborate on this? 4. Exhaust 5. Then i just seen a bunch of random welding. I would estimate like 10-15hp. Did i miss something?

[@AntisepticHandwash]

Now this is an engineer. Fantastic!

[@JanSchaeffer]

Thanks a lot!

[@pauloconnor7951]

Yes, no stopping this guy !!

[@FF-bl9fe]

Gibt es den Auspuff Adapter auch irgend wann im Shop zu kaufen ?

[@JanSchaeffer]

Meinst du die Klappe?

[@aljaxon69]

very tgood stuff. What program or software do you use to calculate the exhaust pipe dimensions? and what is the flap for in the baffle?

[@arvedludwig3584]

The flap is for lower end power. Yamaha has it close to the exit on the cylinder and it's called YPVS.

[@JanSchaeffer]

I dont even have a programm for this. I use my experience and have a lot of testing exhausts. When i see the power curve often i can see what need to be done.

[@иванпетров-в1ы1я]

@@JanSchaeffer lotus engine simulator. engine2motd, engine4motd.

[@иванпетров-в1ы1я]

@@JanSchaeffer buch "design and simulation off two-stroke engines" 1996 "design and simulation off four-stroke engines" 1999 Gordon Blair. "Design technique's engine manifold: wave action methods for IC engines" 1999, "Theory engine manifold: wave action methods for IC engines" 2000 D. Winterbone, R. Pearson. Ludwig Alphabek, Gelmut Bench.

[@иванпетров-в1ы1я]

@@arvedludwig3584 я это все знаю зачем заслонка на выхлопной трубе. Читай книги по двигателям немцев Альфабека, Бенша. Самые лучшие книги английские книги Гордона Блэра. У Блера есть ещё 1 книга по 2-т двигателям написанная в 1990 году. Все книги что я написал у меня есть в электронном виде.

[@wasseristnassss]

Für den Hubraum amtlich! Aber hast du nicht die Kubelwellenlager verstärkt?

[@JanSchaeffer]

Walzenlager halten mehr aus, haben aber etwas mehr Wiederstand.

[@wasseristnassss]

@@JanSchaeffer ich meinte auch das Gehäuse. Gibt bei so hohen Leistungen Gehäuse die reißen am Kurbelwellenlager.

[@meskalin64]

That butterfly is to give more power at lower rpms? How is it controlled? 50cc?

[@pfeyusvg3744]

Gibt es noch eine genauere Erklärung zur Klappe im auspuff mit der du den Motor zum überdreht zwingen kannst möchte mal wissen ob das auch an scharfen simson motoren funktioniert oder warum das bis jetzt nur du so gebaut hast :D

[@JanSchaeffer]

Die Klappe ist noch Problem behaftet da in der Drehzahl wo sie wirken soll der Zündfunke zu schwach wird.

[@metalMastery78]

You have great skills.

[@JanSchaeffer]

Thanks a lot!

[@giovannibortolotti9384]

How do you calculate the exoust?

[@TROdesigns]

Incredible work!

[@JanSchaeffer]

thank you :)

[@wernerelkmann186]

super gemacht.....schönes Werkzeug....

[@JanSchaeffer]

danke!

[@RATADATUAVELHA]

artist! it would be great if you could explain the steps that you're showing, can be with subtitles. no worries.

[@JanSchaeffer]

On the chanel are a lot of single videos of the project with all the single steps, this video ist only a summary.

[@EVO1087R]

Looks like people are asking for the ASMR raw version. I don’t mind the music. How does the butterfly in the expansion chamber improve performance? Shouldn’t it be a slipper pipe instead?

[@JanSchaeffer]

@@EVO1087R when you let the pipe slip, you need more power and a lot more mechanical stuff.

[@fregatify]

How can you semi-automatically weld aluminum? what wire? what gas? First time seeing this, sorry for the question

[@JanSchaeffer]

It is a 4 Roll MIG Rehm Machine i think 230 A bit i dont need the full power. It is 1mm ALsi12 wire.

[@JanSchaeffer]

I think the gas is callee Argon 9.6

[@beamerboy9273]

What the PPE filtering system do you use?

[@attilahavasi6987]

Very impressive! Can I ask, what setup do you use for aluminium welding?

[@JanSchaeffer]

Rehm Synergie pro2. 1mm wire Alsi12. Argon 9,6

[@attilahavasi6987]

@@JanSchaeffer thank you!

[@guiltygearcore]

ASMR 2 stroke tuning.

[@arielfernandez8196]

I feel dumb for even asking, but are you running normal pump gas or some e85 or what

[@johnakroyd115]

How did you split the cases after welding and machining?

[@Toxic2T]

the butterfly in the expansion chamber is an alternative powervalve solution right? since it cannot be integrated into the cylinder its done on the pipe instead. Genius idea !

[@JanSchaeffer]

yeah just like that :)

[@Toxic2T]

@@JanSchaeffer Total madman! Respect

[@JamesParus]

Good design as its easier to make the exhaust as its almost straight. And carb is totally level too.

[@JanSchaeffer]

yeah thats very good stuff :)

[@superkas]

Is the the most popular 2 stroke engine for tuning and enthusias culture in Germany?

[@JanSchaeffer]

yes!

[@Eduardo_Espinoza]

I was thinking of putting a butterfly valve too in the resonance chamber! :D

[@stridell6616]

What is the purpose of the plate in the exhaust?

[@arnaldorentes5371]

My respect, man! 👏👏👏👏👏

[@JanSchaeffer]

Thanks a lot!

[@clausmadsen1257]

Impressive to be able to do it in 7 minutes after some of the products he uses MUST take 24 hours to harden

[@GenuineFlolie]

Can you explain what exactly it is what you have done here. Not everyone is into tuning. With text or spoken, would be appriciated

[@Ethan-burner-acc]

He changed the reed location to the case rather than having a intake tube, redecked the head for more compression, made new exhaust

[@krachtzendaeulenband7657]

Dieser Motor hat aber gewiss nicht mehr die ursprünglichen 50 ccm oder??

[@JanSchaeffer]

70ccm hat er jetzt

[@rockrl98]

How reliable is a set up like this?

[@JanSchaeffer]

Not really with this Setup. If we change the Setup and los 2 hp than it is way better.

[@Rch5.0]

Wow now thats some good fab work on a 2 stroke lots of power thats got to be 50 or 60cc 28 rwhp is great

[@JanSchaeffer]

thank you!

[@firedustman]

massive power ! need a run

[@Giorgio_Caniglia]

Would explaine all the steps and the reasons behind those steps?

[@JanSchaeffer]

You can find a lot more videos of this project on the channel.

[@Giorgio_Caniglia]

@@JanSchaeffer thank you!

[@abdurrahimmohdnor9005]

How Height of exhaust? N how duration exhaust

[@dennisdebengel1989]

Looks like a tomos a35 blok . can buy Simson mopet here, but realy want 1

[@JanSchaeffer]

It is a good descicion to buy one🤩 You can easy but every spare part for the whole bike in good quality.

[@butziporsche8646]

Hey, where can I get a pipe for my Rotax 128?

[@captainchaos3053]

Please explain the choke in the exhaust?

[@MX-fo2nu]

7 Min. wäre schön :-); trotzdem top; auch 700 Min wären schon gut, reicht aber längst nicht.

[@geoffbrown4182]

Get rid of the music…please.

[@rowanaviation]

Get rid of you…please.

[@reesetrescott6339]

Turn the volume down on your device

[@7x779]

​@@reesetrescott6339too late it already infected my brain and paralyzed me and I think I'm going to throw up

[@eamh2002]

How were you able to melt that part at 0:29? It can't be aluminium for sure because it melted like tin or lead. The question is why was it in a shape of an aluminium bracket 😲

[@JanSchaeffer]

It is aluminium. Rehm Synergie Pro2 with 1.0 wire Alsi12. Argon 9,6 I did about 50 cases this way i think. Think about the temperature of the cases and do a few breaks between. When temperature rises over 180 degrees on the bearimg seat, you get later Problems witz the cases.

[@eamh2002]

@@JanSchaeffer Okay thanks for the reply :)

[@user-Terracer]

Damn..... I should have paid more attention in shop.... BTW there is a formula to creating expansion chambers that can give you all the dimensions you need - but please don't use it as watching you build them is pure joy..

[@fatrambo73]

can you do this to an outboard for a boat?

[@TeemuTiainen-t1i]

How many cc and what motor

[@Giorgio_Caniglia]

Wonderful work sure, but with a title like that I expected something simple to do, you literally changed the motor and with machines impossible to have for a normal person 😅😂😂

[@JanSchaeffer]

It is quite simple, ig you think about to build a spaceship 😂🙏🏻

[@thelonemoomin]

Awesome project but its possibly a little beyond my skilset. May have to revert to just buying a more powerful donor engine. 😂

[@gilogreenaway2989]

wow!

[@gbm9115]

Super doch halten die anderen Bauteile das aus Kette Bremsen uvam. ❓

[@JanSchaeffer]

das Fahrwerk was zu sehen ist wird nur für den Prüfstand benutzt. Niemals im Straßenverkehr.

[@motorizedbicyclenation53cu90]

Shoulda stuffed the case as much as possible made it a case reed but it hen again ya can get more with a piston port last longer more bottome end w reeds 🤷🏻‍♂️

[@beamerboy9273]

dude using 1,6k $ air-purifying respirator

[@PHUSII]

This shows how overly engineered the gearbox in some cases are. Takes almost 10x horsepower, no problem! :D

[@billymanilli]

Not exactly a "do it in on the back patio" type of job, I see... That's pretty modified there, sir! edit: on that thing!? If it doesn't tear all the spokes out of the back wheel, it's gonna be really sketchy! ...and just the type of thing I LOVE! 🥰

[@fidelcatsro6948]

How much cylinder bore cc did you increase to get 28 from 3hp??

[@JanSchaeffer]

from 50cc to 70cc

[@fidelcatsro6948]

@@JanSchaeffer wow 28hp from 70cc at 10000rpm! phenomenal!

[@K3B524]

7 Minuten? ä, ja iss klar ;-) und vor allem ohne die vielen Haushaltsüblichen Werkzeuge. Ich habe mit dem Schweizer Taschenmesser und einer Getränkedose einen VW-Bus T1 gebaut. 😋

[@alexanderpotzelsberger719]

Sehr geil

[@richardj2927]

autogen schweißen habe ich lange nicht gesehen

[@sh0t3dNL]

Please don't wear gloves while using the lathe. Nice content

[@JanSchaeffer]

Yes, you are right!

[@juanandresdhers9093]

Impresionante! Muy buen trabajo!

[@JanSchaeffer]

Muchas gracias!

[@frankschuller3698]

Sport frei 🙋

[@ggggerryggg8170]

Is it still a 50cc?

[@JanSchaeffer]

No, it is a 70cc

[@buildingracingvideos4714]

Impressive, but that's a lot of work just to be able to say, yep, its still got factory cases.

[@HardwareJunkieYT]

3,5 PS? 🤔 Der Orginale S51 Motor hat doch 3,7 PS.... 🧐 Ansonsten Geile Videos und gut erklärt 👍

[@MX-fo2nu]

Auf dem Papier, in real irgendwas um 3.7 +- 0.5 ( oder +- 0.8)

[@HardwareJunkieYT]

@@MX-fo2nu streuungen sind überall. Beim Auto streuen sie auch gerne nach unten, deswegen gibt man die Nennleistung an. Bei der S51 sind das 3,7 PS.

[@MX-fo2nu]

@@HardwareJunkieYT So oder ähnlich ist; das kommt durch Herstellungstoleranzen.

[@Kippo6969]

How many cc? 80?

[@JanSchaeffer]

70

[@Kippo6969]

@@JanSchaeffer that is super good power for a 70cc. just want to tell you about a cool finnish youtuber, asoftaaja hes making a 20hp 50cc, hes currently at 14 tho and has already cast 5 cylinders.

[@2smokes]

where did you get the pipe bender?

[@JanSchaeffer]

A german company wich is called "Metallkraft".

[@2smokes]

@@JanSchaeffer thanks !

[@flyboyfs]

​@@JanSchaefferis this machine the cone bender? I search for ir but can not find it, you know the name of the machine?

[@stefanclemens6482]

Nice ...👊🏻...

[@gvp4]

impressionnant !!!

[@JanSchaeffer]

:)

[@max.1o4]

Schneller als nils, jawoll

[@nils2tr]

War noch arbeiten :D

[@WeebRemover4500]

holy shit was that gas torch welding???

[@JanSchaeffer]

@@WeebRemover4500 WIG 1,0 wire ALSi 12, Argon 9,6

[@s.u.6198]

UFF ... ZU ;-) so geil...