Two insane engines!

[@YeeThirty]

I want a 52mm bore PiP cylinder so bad damnit... ive been following this whole thing for years now... from the thought of you casting a cylinder till now has been an epic journey. Hope you get to mass produce them one day! 🙏 keep it up! Also F to pay respects for the circlip

[@tinkmarshino]

Damn this always gets me so excited.. at 70 my motor skills have really gone down hill.. But still, I get a big kick outta watching you build this monster.. What fun wish I could join you in your pursuits.. I always hate it when the video ends.. Well, you be safe my brother.. have fun and carry on!

[@Toxic2T]

Wish you the best. Age gracefully my man

[@tinkmarshino]

@@Toxic2T given 'er my best shot.. thanks my brother!

[@waltersaunders7699]

Mate. It sounds torquy and free breathing. I can't wait until you dyno

[@ryandeleon24]

AMAZINg

[@nikoalanen7252]

So true

[@johnbreadsell1401]

Sounds like a bedded in piston and ring to me👍

[@BladSG]

that little PiP is insane, can't wait so see what HP and torque it can generate

[@Nickael7]

That is why it is the PimP engine !!! The engine that pimps the other engines to shame !!!

[@zastava1459]

Ironically PiP acronym kinda means the opposite of the pimp

[@1mikewalsh]

More like hp, the lill crank cannot swing many torques.....

[@trianglexentertainment4254]

🔥🎥➡️ BEST 2STROKE🏁 2021DirtBikeAction 🏁 kzbin.infocplYsilk41k?feature=share 🏅👍Such a beautiful day to ride Dirtbikes🌴🎬 #shorts Raw2StrokeSound

[@jakubbakos5521]

Hi, I am from Slovakia and I own Babetta 210 too, thanks to your videos I started to modify it, and now it ride like a dragon against the original 40km/h, I'm looking forward to the project with it. Greetings from the country where babetta was made :) (if you need OEM parts, I can help)

[@PwntifexMaximus]

Oh, if you want some kind of easy and safe load, use a large air-fan. Not a lot of mass (assuming it's not too large) and dispersing the energy without generating lots of heat.

[@PwntifexMaximus]

@Alfred Wedmore You don't need it to be silent or efficient, or even directional like a proper fan. Tripling the speed (and getting more than nine times the resistance) is a good thing. And you also don't need a motor. Just enough circular air-resistance at a given RPM around a fixed axis. Think straight paddles on a disc, blowing unfocused air 360 degrees around.

[@nickopedia5669]

@Alfred Wedmore Engine masters did a video on that, try maybe 10 pounds and the size of an 18" radiator fan. Better yet, you could put a louver in front of it and actually control how much load you apply very easily and quickly with a little servo driven by a microcontroller. kzbin.info/www/bejne/kInHfZqXe72NsNU&ab_channel=MotorTrendChannel

[@ryleyverbeek44]

I have my subtitles on, and the entire time the engine was running it read “applause”. That is both noteworthy and something to be proud of. 👏🏻👏🏻👏🏻

[@roehle9962]

if you’re tuning that mopeds engine, could you do a detailed series on how to calculate port timing, design a resonance chamber, what peak rpm to go for, how to choose a carb etc? you’re literally the only guy who can bring this knowledge to enough people. I’ve built my very first engine over the past few weeks and i must say it’s extremely hard to find out where to start and which formulas to use. Everyone’s using different ones, they all use different terms for the same things and they all start at completely different points, so its really hard to wrap your heac around it all. Would be an easy thing i guess, just taking and a few drawings and examples.

[@gegegege6902]

look at his old videos, he made VERY detailled explanations

[@zagi6584]

Bell's two stroke tuning book is a good start,and as the other comments say,search 2strokestuffing's old videos

[@roehle9962]

@@zagi6584 thanks, ill look into that

[@drwho8565]

He has

[@macelius]

There's a book for that.. a few actually.

[@rickrack78]

Try making a cogged inside idler so the belt runs more smoothly over it. Increase the diameter of both idlers to take up the slack and slow down the bearing speed

[@olasod1]

Exactly what I was going to say 👍🏼. A belt is only made to lean at a flat roller on the flat side of the belt.

[@2STROKESTUFFING]

👍 I'll change it, thanks for the heads up!

[@hrsey71]

I was thinking the same!

[@TURBO5KONING]

I was just running my own racing 2-stroke to get some sound and smell ! good to see your update aswell !

[@BLUEYENKO]

It looks like you could flip the tensioner around to get it tighter.

[@skinnybigstuff1040]

Yes but this guy knows what hes doing soo im sure there is a reason he didnt do that...

[@2STROKESTUFFING]

😁Flipped would be too much tension. New belt should be here in a day or two

[@Few.Be.There.That.Find.It.]

I'd reccomend using a freewheel off of a bicycle, for your load. That way if the engine shuts off, the freewheel will prevent drive to the piston.

[@mrsnezbit2219]

Would it be strong enough?

[@Few.Be.There.That.Find.It.]

@@mrsnezbit2219 well its strong enough to take the tourqe of your legs, he would have to rig a pully in replace of the sprocket. He could use a cassette hub instead. But my point is to use a bicycle hub and wheel that way he can apply a brake load through the bicycle brakes

[@Few.Be.There.That.Find.It.]

@Alfred Wedmore it doesn't need to be geared for speed tho... I build moterized bikes, I gear the engine to the rear cassette and it hasn't gave me any problems over 2 years of continuous riding

[@uwillnotsilencemyvoice591]

@Alfred Wedmore just my two cents and thinking aloud, if one hub is not strong enough can't u double or even treble up ? Or are we now getting into the realms of space and size ? Just curious 👍✌

[@YeeThirty]

They make 1 way cassettes and 1 way bearings in so many sizes... if a bicycle one is too pinner step up a size...

[@williamwinterson5361]

That sounds so responsive and easy breathing cant wait to see it on the frame hurtling down the straightest road and breaking records

[@slothonabike]

Look how happy this thing revs. God i wish i had one of those.

[@MattysWorkshop]

Gday, the engine sounded strong, certainly made the frame do some dancing, top job, thanks for the update, Cheers

[@2STROKESTUFFING]

😁👍

[@Lord_Verminaard]

The PiP engine sounds really amazing. Can't wait to hear it howl under load on the dyno!

[@Broozer-fw3vl]

You should be so proud of your achievement with this and the other engine. Your desire to succeed Is phenomenal and should be an inspiration to all.

[@vincentguttmann2231]

4:50 The twin idlers also cause the angle of the pulleys not to change relative to each other, and frankly I thought *that* was the reason you chose those.

[@vodyanoi1684]

God dam pips music sends chills down my spine can't wait to see it get its first full rip 🤤🤤🤤

[@upsidedowndog1256]

That sounds really good! On your higher rpm "blips" it sounds like it's well over 10K rpm and wants to pull even harder. Fantastic stuff you have going on there!

[@ferrumignis]

I think a sprag bearing would be a better idea for the dyno drive unless you actually want it to back drive. You could maybe use the starter motor drive assembly from a large capacity bike.

[@2STROKESTUFFING]

Great idea!

[@frigglebiscuit7484]

some automatic transmissions use sprags too.

[@panikrev175]

Sprag bearing/clutch is a great idea, not sure about using a starter motor, though. Most use a helical gear, or bendix.

[@ferrumignis]

@@panikrev175 The starters on big capacity bike engines have permanently engaged gears and use a sprag bearing to prevent the engine back driving the starter. No bendix or pre-engaged mechanisms.

[@user-rs8zg8ey2b]

In 1996 I raced the rc car on-road world championship, but the we before Mike Swager was practicing is 1/8th nitro rc on-road car with Ron Perris (rip) built/tuned 3.5cc (0.21ci) 7 port motor running on nitro. It was screening, I asked Ron what's the rpm, just north of 60,000 and a hair over 4hp on the dyno. Up converting, your 50cc should make 95hp to be on the same hp/ci, that's a tall order for only 50cc. It does sounds fkn awesome.

[@peterwhitney11]

That engine really sounds so good can't wait for the dyno. You are inspiring happy Christmas from Australia.

[@paddy2661]

Syntrifical clutch sorry if spelling not right , out of a 250cc scooter , dyno will keep spinning freely if you need to cut engine . Loads of torque up top where you need it awesome. Secondary carb trying to pick issue , maybe only happy at 80% rpm or wide open throttle. Awesome work mate loven it your officially a 2stroke engineer hats off to you.

[@ryanturner35]

Very impressed, wasn’t convinced I’de ever hear it run! Nice work!!

[@jbizzbuildsmanstuff9932]

Man this has been a never ending project! Been watching forever! Bitter sweet that it's comming to an end! Hope you keep going with projects like this! This is a great channel!

[@MrNursi]

PiP really rips! Fantastic Alex, great work. You must be chuffed.

[@oscarzt1652]

18:08 nothing but vibrations with small engines solidly mounted. I have this problem when testing nitro RC airplane engines

[@RobeRtJohnson-qn5dm]

I was taught to use ATF and toilet paper for the cleaning of a cylinder after honing. It does not leave lint or other things behind. It is also obviosly very absorbant as well. Keep up the good work!!!

[@klide839]

The right side idler should be "geared" so that the belt teeth wouldnt wear out from it. The left side one is good because the belt is flat from the outside.

[@klide839]

And have you tought of making a TPI type fuel injection system so you could control the airfuel ratio better than a carb?

[@indigrace6584]

Didn't Tesla say something about resonance, frequency and vibration?... you've got all three there..👍❤️🔥🇦🇺

[@defaultdriftco00]

This is the most riveting channel on KZbin so far! Crazy power from a thimble!

[@wayne1959]

that thing is just wanting a frame to live in mate..Excellent work and much respect for your knowledge

[@justgottasendit8825]

Holy crap sounds like a nitro rc engine! What an insane build!

[@frankg3278]

Just got myself a Puch Maxi. Can't wait to see what you do with that!

[@guidoheeling1179]

Those are cool, had one two when i was a teenager. Had a bigger 79cc engine on it, would go 65 on our farmland by the backyard.

[@frankg3278]

@@guidoheeling1179 It's a 1978 N. I'm fully conditioning it. I wanted to keep it looking authentic but faster so I stuck with 50cc and a 6 port cylinder. Fingers crossed for 45mph lol

[@mvrbryde]

Absolutely insane, I've been watching you for years, keep up the good work🥃

[@garage2umobilemechanicandt717]

Just amazing, what else can I say,I consider myself clever, but this is another level, so good to see people like yourself doing these thiings, makes me want to achieve more.thankyou.

[@2STROKESTUFFING]

Thank you!😁

[@Touwtje]

Yes! Very hyped to see this pulling the dyno soon!

[@acurarl9929]

So excited for you. Lot time an energy to get here. Glad that you can see the potential in physical form now.

[@PwntifexMaximus]

Opposed piston engines! More complicated, but it literally cuts the effective piston-speed in half and is easier to get good scavenging with (By offsetting the timing of the two pistons so the ports are covered/uncovered at the optimal time.

[@comethiburs2326]

he's shooting for single cylinder, 2 stroke 50cc WR. opposed piston counts as a twin. not saying that you're wrong, vespa made a 125cc prototype that went over 100mph in the early 50's doing just that. 17hp in 1951.... i can easily imagine that a brute force, twin supercharged opposed piston two stroke would be a land speed monster today.

[@PwntifexMaximus]

@@comethiburs2326 Ah, bummer. I thought it was HP/cylinder volume he was going for. So even though it's two pistons, it's a single cylinder *technically*

[@donniebaker5984]

@@PwntifexMaximus its one piston with two carburetors ..the primary carb is used on start up to full throttle... then he kicks in the secondary carb full throttle that is mounted on the long intake runner . that is when the engine tries to come off the bench! Lol . I was going to ask if he has tried to dynamically balance the crankshaft by spinning it without the rotating assembly but with a weight box with lead shot inside that all together weighs within one gram of the total weight of the connecting rod and bearings plus the piston , pin, keepers, and the piston ring....then with weight box with the proper amount of lead shot inside clamped and bolted to the rod journal of the fly wheels you spin it up to the maximum RPM that you are tuning for and you will eliminate almost all the inertia produced from improper static balance ...i had this type of balance job done to an old FLH Big twin Harley and it was unbelievably smooth and hardly any vibration ..this is how they do it at Precision balance Company of Indianapolis Indiana where they balance IndyCar engines period but balancing engines is just part of their work they do . A lot of other things are all types of shafts and big balancing of industrial Machinery that's been custom-made

[@garytompkins2116]

PiP motor really sings. Looking forward to seeing it tested on the dyno 👍👍👍

[@djfaber]

Good job getting it running!

[@fritsovermars]

Hei Alex, once again you are doing a great job of promoting two-stroke technique and exploring new paths. I'd like to make three remarks, if I may. A: the pulley that touches the smooth back of the teethed belt is OK, but for the other pulley, that faces the belt teeth, you might want to use the biggest diameter that you can accommodate. It will run smoother that way. B: a 0.66 mm squish gap is not only safe; it's more than safe. With a crankshaft in good condition you can narrow the gap down to 1% of the stroke. C: a 0.15mm ring gap may give a nice compression when you turn the engine over by hand, but it is NOT safe. Use at least 0.5% of the bore diameter. keep up the good work , Frits

[@2STROKESTUFFING]

Thanks Frits! Nice to have you here😁 A: Yes, Many have pointed out the same thing, I'm deleting the second roller, or going with a toothed one. B: I know, I know. Should've said "can't be bothered with taking 0.25mm off just yet"😁 C: Not sure where I got 0.15mm from, what I've been running in several engines. Now I'm nervous, need to open up that gap.

[@fritsovermars]

@@2STROKESTUFFING Deleting the second roller sounds good. You know my motto: KISS (Keep It Simple Son). Any part that you can leave out, weighs nothing, costs nothing and never breaks.

[@2STROKESTUFFING]

@@fritsovermars 😁👍

[@stuartliddle7228]

Just,just, just.... awesome work, love watching this.

[@marknelson3511]

Yes I agree a one way bearing would work excellent for the Dyno flywheel instead of the clutch.

[@2STROKESTUFFING]

👍

[@xferth]

Most badass 50cc. It sounds so torquey

[@lithium534]

Holly Shit. That engine has some power going there. Tip. You can get "cheap" Ducati slipper clutch for the anti seize mechanism. They are great as they only allow power transfer in one direction and you slip can be adjusted with springs. They are also used in Supermoto bikes. Always great stuff. Looking forward for the next video.

[@2STROKESTUFFING]

Thanks for the tip!

[@torala]

Oh boy! That PiP sounds pretty good!

[@898581]

Really be nice to see the brute force induction engine run....

[@patrickhackett3878]

You can keep your 6 litres twin turbo V8. A small 2 stroke sounds so good!

[@Espenf94]

Helt rått hvor pip motoren fungerer uten noe last, er nok mange som gleder seg til å se den i aksjon på dynoen!! Helt konge jobbet, spesielt hvordan du går fra ideer til et ferdig produkt som fungerer 😀

[@larrrevenga49]

Got to love that work station you have there

[@jaratt85]

I love Jawas! They are LEGENDARY when it comes to speedway racing, pretty much all anyone runs around here anymore. They made some pretty cool twin cylinder street bikes back in the day too. You should look into o ring-ing your block and head so you never have to worry about gaskets again. I figure if it works for a Detroit 2 stroke, it should work for you too.

[@nickb9563]

Needed a quick break from the workday and got this notification, much appreciated 👍

[@Momfasa]

Oh my, this is a powerful engine. I can hear it

[@radron14]

Greetings for the US, I’ve subscribed and watched all of your videos and subscribed and enjoy them as I have been experimenting with 2 stroke engine theory since 1989 and built an EFI system in 1993 which made a huge difference on jet ski engines that are direct drive and the EFI allowed me to move the Power Band way up top like a 125cc dirt bike but with a 2 fixed Venturi (pumper carb as you call it) carbs the engine would bog and in jet ski racing without it, huge difference! getting off the starting line was a must but you have too port the engine, stuff the cases by stroking and high secondary compression which resulted in a lot of bottom but suffered top end speed as the engine would not rev out. The EFI I built allowed me too over port and have instant low end power. Many failures until getting the injector at optimum angle too the case Reed engine, if you would like my findings which would avoid the “ advance tool chasing” 😆 feel free to ask and they are yours. I have a couple of questions if you you have time too answer and would appreciate it very much… #1 I love your drill press, could you share the make and model? #2 I fear you will end up with a very hi BMEP and I have found that billet cranks and rods help with out building a grenade #3 I believe anything over 1.6 primary compression ratio tends to overload convention crank seal contact with the crank, possibly a mechanical seal may help with primary compression loss? Thank you for your time and very well done video editing as I really enjoy your videos and a can send a pic of my EFI intake via email if you like.

[@VolV8]

I get excited with each development!🔥 BRILLIANT 👍 Thanks for the upload.

[@ZeldaNumber17]

Crisp and tangy sound

[@seandavis1046]

That thing is nuts. Can't wait to see it moving

[@Patriot-Logic]

Sounds crisp! Can’t wait to see how it works in a bike!

[@rodriguezfranco3839]

yeah brother !! keep kicking ass Alex

[@staminadan]

Just a quick thought. While running the PIP, I think I can see fuel starvation on one of the fuel lines. There are bubbles forming in the left line. I think vacuum from the secondary carb is starving the primary. Watch carefully....how much is the secondary involved when at top rev? I think it will also influence the amount of fuel the secondary is getting due to vacuum loss through primary fuel line, etc...Two separate lines, easy fix. Really enjoy what you are doing and am grateful for the opportunity to learn.

[@2STROKESTUFFING]

Good tip!

[@dirttdude]

With forced induction you usually want more ring gap but that exhaust port is so big you don't dare gap it to much.... this is going to be fun

[@Topsiekku]

The engine goes around very happily. I think there's a lot of power out there.

[@jonyherz9688]

Has anyone tried to build a double liner in one cylinder, one stationary and one rotary, by turning it would open and close the channels, maximum compression would be achieved, the opening and closing of the channels would be only a few millimeters from the piston, maybe the rotary liner could be connected by gearing to the crank shaft your work is incredible i look at it like a calf at a new gate it's very inspiring keep it up

[@SoddingaboutSi]

Wow that's sounds bloody powerful. Fantastic! Any one out there still doubting?

[@colta51]

Good timing just before bed as always 👌🏼

[@quirkyMakes]

getting goosebumps. so close.

[@lands3r]

5:00 cant you replace that other bearing with a nother wheel to increase diameter and get enuf tention on the beld and olso nothing is rubbing on the teeth of the belt except the wheels?

[@2STROKESTUFFING]

👍

[@Nordspets]

Looks like christmas came early, Soo much content in one video! thanks for the upload,this really made my day!

[@velobob4299]

Nice one Alex,busy busy.

[@PPekka]

Wow! That thing sounds bad ass! It looks like it really wants to go!

[@johndejong163]

Awesome!!! What a rev mate, good job. And i see that your milling experience increases a lot. Keep on going

[@remcovanvliet3018]

I don't know exactly how much of an inconvenience that external boom mic is to work with, but it does sound a million times better than your current setup. Not saying you should bring it back, that choice is entirely up to you of course. Just thought I'd mention it. I'll keep watching regardless, just as I have for some years now. Please keep up the awesome work! I can't wait to see this thing thundering down the salt flats at Bonneville.

[@2STROKESTUFFING]

Agree. Need to find a better compromise.

[@graxav]

Loving it .. pretty sure this lump is gonna jump!

[@davidosborne5057]

Great video as always. Simple idea instead of a clutch between the motor and dyno, maybe a polyurethane or rubber attached between the 2 like an old school steering coupler. That can break away in a lock up situation?

[@LJ-fe8vb]

Ktm hire this man already! Take 2-strokes to the next level!

[@abikelife1481]

He probably makes more now on youtube than they could pay him lol

[@GENcELL2014]

Something totally different you can use a compact powerful 2 stroke engine for is a long range fpv drone. Doesn't necessarily need to be a quad style drone, I was more thinking of a plane drone(if you want to get fancy it would have vtol capabilities). Engine either powers propeller(s) directly or it powers a generator and the propeller(s) are electric.

[@SuperRandykid]

Electric props for vtol, PiP 2 smoker for main thrust 👌

[@GENcELL2014]

@@SuperRandykid that's the combo!

[@marcussho]

It’s come a long way since the beginning!

[@exoticg9]

Man i'm loving this journey!! 👍

[@jamest5149]

A tip, for porting etc… cut some thin wall pvc pipe or cardboard tube of a similar bore as the cylinder cut a couple of different shape windows in it and use it as a mask for grinding ports, make it long and you can simply slide the tube up and down or twist it to align ports/ edges etc protect the wall, as you will be fully aware die grinders like to jump and can damage your nicely honed bores 👍

[@2STROKESTUFFING]

Great tip!

[@Pulkka_]

Sounds powerful

[@adventureswithmichael6589]

Best video by far!!! That engine is nuts!!! Great work my friend 👏

[@timokenful]

beautiful work!, the P.i.P. engine sounds great! really nice find. be sure to keep going! you could see that you were happy, and you deserve it buddy!! After all the setbacks, you managed it anyway. and the camera.. no problem, once it goes well and you're busy, you just want to be able to continue, hahaha. the "blower engine" no words... looks insane, it's a beast, and with the confidence I now saw on camera ;) ""GAME ON"" greetings from Belgium

[@MegaSheila12]

Great content.. Greetings from San Antonio, Tx. Love watching your videos.

[@jok3yjesu339]

You know with the 100% of bore piston I honestly think having like 3 pins to stop the ring from the hitting the port might work better because right now I feel like that one pin is stopping the middle from hitting it but not the edges, also I was thinking what if it's not exactly 100% of bore what if there's still a bridge just not 100% across the port like maybe a small gap in the middle

[@Pantelismagg-zb6ll3uh5z]

I have seen that working at 90 -100 cc extreamly ported chainsaws

[@tennesseecaldelari4191]

About the Belt you can invert the direction of the slider🤙

[@22Steez]

there are one way bearings .. i think with a system with a motorcycle clutch there can be hidden problems...

[@TheMrkylester101]

Sprag clutches bro

[@2STROKESTUFFING]

Great idea! Can't believe I didn't think of that.

[@guerrillaradio9953]

You're putting the 4 cylinder rc engine on a moped....I wish you didn't live so far away lol. R/C was what got me into engines at age 5. It was only 0.8cc, but I was hooked. Have you seen the video of a guy who put an ASP 400 radial 5 cylinder on a moped? That thing sounds amazing. It's 65cc 4 stroke; getting that 14cc to move a person won't be easy. It's going to have a really low top speed with the gearing it will need...but it'll sound awesome!

[@barje.waffles5461]

That thing is GLORIOUS! … I mean both… no, all those things. I love all the things.

[@BRRT199]

Just a Tip from Germany Put a big Screen Protector Glass für Tablets over your CNC Window on the inside the Coolant will just roll off

[@2STROKESTUFFING]

Thanks for the tip!

[@Dan-bd5wt]

Damn Man, fine Rev from your engine 😎

[@davidandvarley]

I'm enjoying this. Great progress!

[@chadscott2499]

The rotary value should help but I know I had a lot of problems with my rotax motor the brass gears would wear out

[@Down.Range.]

So pumped for your future

[@vacuumpowered6119]

I really love the sound of the Pip engine

[@alaska4229]

Highlight of my week right here

[@jesperwall839]

It really sounds potent than engine. Love it 👍😀

[@tommikarsikas1320]

That's quite a bit of work to move two chairs 10 centimeters to the left. Atleast it's the coolest way I've ever seen, apart from using explosives... which this may still turn out to be at some point. Awesome job. Can't wait for the nitro.

[@simson9768]

Langtuning 😍 2:19