I build my strongest 3 Rotor yet! 1200 HP

For more information about Valvoline’s VR1 visit www.valvoline.com/our-product...
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AWD 4 Rotor Video Series: bit.ly/2QiFduE

[@seanharrison6162]

Do I have a hour to watch this? No. Am i gonna ? Yep

[@seanharrison6162]

Well thanks rob just want you to know I was always into rotaries cause I love unusual motors but honestly you and the Vargas brothers are the only one who really share information on how to do them properly hopefully I'll be buying parts from you when I can buy myself a rotary love from Jamaica

[@tommylyeah]

Oh, fuck, this was an hour long....

[@lavachemist]

Same. Haha. I was about to walk out the door, when KZbin started autoplaying it. I guess I'm here for another hour 😁

[@johnsimons6748]

Did I just spend and hour? It was so interesting I never kept track of time. That means the content was great.

[@i-love-comountains3850]

It's so worth it just seeing Rob so giddy, and Isiah was just beaming, I love it! Wholesome content, boys!🤘😁

[@Racingboom]

Did Rob just upload 2 videos in less than 48 hrs and they’re both long. *NUT*

[@danielmuela1950]

The drugs must be very strong this week

[@usercid640]

bonk 🏏🐕‍🦺

[@extec101]

@Duner250R whittington brothers... we just bought a race track and two airplanes.

[@reginaldbowls7180]

its new coke

[@cyrussilvermist7739]

A whole hour of Rob Dahm rotary content?! God is good

[@zkhydro4985]

Let me guess. At 32:00 he's gonna cut the video and just leave blank footage as a joke.

[@Liam-ir6xm]

@@zkhydro4985 SHHHHHHH, dont give him ideas 😂😂😂

[@Carlos.Rivera]

An hour is 60 min Video is 54 min

[@09mc22]

He needs to do this

[@danielnelson4881]

I know you love Rob and are excited about this long video.. But you're gonna call him "God" now? Yeesh.. I wouldn't go so far as to say he's a God.

[@mattconway8900]

2022: Rob is now making billet titanium rotor housings

[@aserta]

One kg of titanium is about 300$, so i dunno boot that.

[@mattconway8900]

@@aserta whoosh

[@TheBirells]

I read it 2072...! LMAO

[@dragonggw5843]

If he makes billet titanium parts, should he stop saying "irons"?

[@mash3749]

Literally thought the same thing solid titanium

[@TheMatze2304]

I think this and the last video are the most hype since the first 4 rotor startup. I love the fact that you got into machining and do your own thing. As a german engineer i think you are doing an amazing job and am flattered that you got that really nice cnc. Lets go rob, youll be THE rotary guy in america!

[@NaClSandwich]

Yeah this is so awesome and as a non engineer I have learned so much. Rob has this methodical scientific way of doing things and these two videos are just incredible!

[@schmuhf]

Listen, people. He's not just an engineer, he's a GERMAN engineer!

[@jacobm2625]

Maybe, but he’s got a lot of work to do to catch chips motorsports

[@TheMatze2304]

@@jacobm2625 rome wasnt built in a single day

[@vinzchannel01]

@FBI Guy And that Flattered German Engineer thinks Rob Dahm is doing a great job

[@MetallicalCatastroph]

Oh my god, he's gonna rebuild the 4 rotor as well later, won't he?

[@splean9438]

Maybe even the 6 rotor

[@MattyEngland]

8 rotor is where it's at. 😂👍

[@lazarustheatv8389]

12 rotor

[@Noodle2k]

Engine built, put in the car, AND fired up in ONE video! YES!

[@MajestyCXV]

I like how the 1st comment was "meow" lol

[@xploration1437]

Meow

[@moldyskittle]

Have a good day, meow!

[@charlest7092]

Honestly I'm not surprised with this community

[@adamfrbs9259]

Lol.

[@xploration1437]

@@charlest7092 Now, just what is that supposed to mean?

[@MilestheMechanic]

Rob is looking like an evil genius/mad scientist who's convinced he's about to conquer the world lol.

[@dingus153]

Hell yeah Rob, maybe I'm just noticing this but the quality of the video is looking 🔥

[@RobDahm]

Upgraded to Sony a7s iii and new gimbal

[@KevinOhlin]

@@RobDahm it shows! 🔥

[@carsongeye1462]

Being that I’m studying to become a mechanical engineer, seeing all that math come together and have each bolt fit perfectly was incredible. All the work you have put into this is just so amazing and I cannot wait to see what you keep making in the future.

[@CHUDHUCKER]

Rob, hard to tell by the video as we are seeing the gauge from an angle, which is called parallax error but, it looked tight, around 0.0005" and the way the indicator was angled you will have what is called cosine error. Within 20 degrees you will need a tip with a football shaped stylus tip called a involute tip, if not you can calculate for this error using the ball tip you have. The contact looks to be at 30° to the part. The indicator reads 0.0005". Cosine Error Correction = 0.0005" x cosine 30° = 0.0005" x 0.866 = 0.000433" - Difference = 0.0005" - 0.000433" = 0.000067". This number is what you subtract from 0.0005" to get your real reading. It isn't a lot and will probably make no difference but, I thought that I would let you know. If you were measuring parts step by step that are part of an assembly this error could add up and be out a significant amount and could potentially cause an issue. Sorry, I'm nerding out here big time but, it is all good stuff to know. For comments on the other videos, I believe a milling boring head is a more accurate and precise way of creating your dowel holes based on your datum of choice (however a much slower process). Using an end mill and reamer is ok, however the holes are being resized so the holes will be precise but, not accurate given you are trying to achieve coaxiality with each plate and housing. If you see this message ask around, you work with some pretty experienced guys and see what they have to say. Cheers and great build as always!

[@nickopedia5669]

You are mostly correct in theory except that type of dial indicator measures movement perpendicular to the face of the dial, not "in and out" like a conventional dial indicator. In addition, they design them so the needle is just about rubbing the face (the side with the markings, not the cover) specifically to eliminate parallax error, and in this case the needle is only moving a few degrees so we are seeing approximately the same level of minimized parallax error on each end of the measurement. In this case because of the type of indicator, you would use sine rather than cosine which results in quite a bit less error (subtracting .5 of the original value rather than .87), and I would guess it's about 1 to 1.1 thou of clearance being indicated on the gauge with about 5-7 tenths being the actual amount (I'm not sure it's as steep as 30*, but its hard to tell of course being on video)

[@CHUDHUCKER]

@@nickopedia5669 Yes, you are correct, the parallax here isn't really an issue. My bad. I am confused about the sine rather than cosine error though as I'm talking about indicator stylus to work piece angle. I understand you are using a test indicator correction factor with 0.87 witch is derived from cosine error. To the life of me I cannot remember sine error ever coming up in determining test indicator error. It has been about 7 years since I've practiced metrology so go easy on me. Thanks Nick.

[@nickopedia5669]

@@CHUDHUCKER I haven't officially studied metrology in my classes yet but was more approaching it from just a math/geometry perspective, so "sine" error is probably the wrong way to do it even if it achieves the same result. I looked it up and indicators that use a sweeping arm to read perpendicular motion are called "dial test indicators" while the classic plunger style is just "dial indicator". I suspect the cosine correction formula you used is meant only for dial indicators. In your instance you said that you were using cosine(30) x the measurement, which is the .86 x the measurement and that is what I was saying was too much correction. Since the "test" indicator in this case could be simulated by a conventional indicator at 90 degrees to it, you could just do cos(90-30) to "virtually" replace the dial test indicator with a conventional dial indicator, or just use sin() for dial test indicators and cos() for dial indicators. Both equal the same thing, and in this case are a correction factor of 0.5

[@CHUDHUCKER]

@@nickopedia5669 I should specify saying about 30 degrees. I do see where you are going with this though. To be honest, I never would try to measure the angle and would just use the correction factor of 0.5 anyways. I was just fully nerding to show the math. The force used to push the shaft up not being constant blows out the repeatability here anyways.

[@helplmchoking]

Holy crap that sounds so, so much smoother than it did when you ripped it apart!

[@Mrpar827]

Welcome to Rob Dahm's shop, pick your very own rotary billet engine, we got 2 rotors, 3 rotors, 4 rotors, and guess what, even a 6 rotor, enjoy :)))))

[@_Zdex007]

Just need a 1 rotor. Now I want to see him make a one rotor classic mini.

[@lazarustheatv8389]

Do 5 rotors exist?

[@_Zdex007]

@@lazarustheatv8389 Rob could try that at one point

[@AlexPagliro]

yo okay real talk though I'm 23 minutes in and I'm so proud of rob, I feel like a proud dad at the age of 18 watching rob make this engine nearly flawlessly with the dowels coming to the same exact height. its really cool to see rob at this point in this venture and I'm so happy that I've been apart of his fanbase while he's made these achievements

[@Brother2Jis_27s4]

I'm seriously hoping you take this to the level I think you're going... I'm rooting for you, and I see you definitely have the drive to be a top shelf builder/engineer doing something you apparently enjoy doing. Good luck, I'm hoping to meet you one day and see where this new found skillset takes you 🤙

[@MattyEngland]

He's gonna build a billet fleshlight for sure.

[@jafferm1938]

i LOVE HOW ALL THE VIDS END SO ABRUPTLY

[@eh2bseries]

My first Rob vid is when he first took the 3rotor apart. Many years later this man has done so much more. Keep moving forward Rob.

[@von...]

48:52 garbage kitty woke up from his trash nap lmao

[@xploration1437]

Meow

[@dakar318]

I’ve never watched a 54 minute KZbin video before... until now. It’s so awesome to see this growth in content, knowledge, skills, and ability video after video.

[@NovaRedHead]

For 54 minutes worth of video, do we get a standard Rob Dahm outro with a cliffhanger? Let's find out 👌🏼

[@xboxlive6]

No blue balls. That's a first.

[@simracingdrifting1043]

when we gonna see Rob Dahm Rotor Company???

[@Poizdrc]

Its not far away thats for sure.

[@unchartedgroupielove]

TRIPPLE R ... robs rotor racing

[@glengee4462]

He’s got to learn how to build them reliably first

[@hotboiz3119]

@@glengee4462 he’s making it reliable

[@rush2489]

May I say, this was one of the best rotary assembly videos I have ever seen. none of that 'can't show you this part' or cuts too long where you cannot follow it.

[@fryreartechnology7611]

So proud of how far you have came with your skills. It's awesome to watch some grow in skills. Welding, CNC, cad drawing, planning just doing it! So awesome. Keep it up young master

[@mact.26]

Everyone gets to a point when the budget build turns into the no budget build, this is going to be wicked

[@Backydbuilds02]

"Well we do need it to hold on the hood" *hoonicorn race flashbacks*

[@relatabl0]

Yesssiiir hahaha.

[@nicklasclausen1247]

more like vehicle vergins flashback

[@VinylScratchBass]

This video is just infinitely fascinating and full of knowledge and subtle wisdom. I've havent been so captivated by a entire engine build because it's so cool to learn what goes into a rotary. Awesome content Rob. This is pure gold.

[@tmylve3495]

Rob, we all see body work progress on the 4rotor in the background in these videos. We all need to see it lol

[@zakrawlings3764]

Was one of the first things I noticed was that rear arch

[@eddiev795]

Oh!!! Patreon knows!

[@nanan_hello]

That is awesome. When I get my first car I am planning on 3 rotor-swapping it. I'll be making sure to take some notes from your videos.

[@PRANKurFACE]

Love your enthusiasm but normally the words 'first car' and '3 rotor' don't go well. Very expensive 😭

[@brandonw465]

not to be that guy but its gonna cost you 20k atleast to do a 3 rotor swap and thats with doing work yourself.

[@nanan_hello]

@@PRANKurFACE I know it will be a long process.

[@nanan_hello]

@@brandonw465 Mhm yes I know, I already have a plan on how to provide the money for myself, I am also aware that it will take a while get the custom parts for the engine, and swap out the transmission (manual swap too), etc.

[@ethanruedinger1630]

Love seeing the progress on all the cars and in your skills! It’s been awesome following all of your journeys man!

[@robertshampeau6028]

this is almost my favorite rob dahm video,only slightly edged out by the burn yard video of the 4 rotor....i love how enthusiastic he is but at the same time how soft spoken he is ...youre so inspiring Rob dahm

[@shark2u6]

Excellent job Rob. It's awesome to see all your hard work coming together.

[@DRIFTWORKSINC]

Rob, the test indicator lines are 5 tenths, your shaft play was about .0006-0007 just under a thou.

[@robertkollasch2473]

This is so epic, your journey has been epic, you've still got my attention!

[@thekamalwhf]

thank you for making this and sharing information on rotaries, its very much appreciated.

[@koekcoek]

one of the best explaining videos of how to build a rotary, thanks Rob for sharing all this with the community. the part about end play especially.

[@xploration1437]

Meow

[@bryanlll3937]

Meow

[@liambishop2199]

Meow

[@jerryperez1080]

woeM

[@echo9911]

Meow

[@hmmmyes6934]

Meow

[@sparkysimian]

hm... I think there needs to be a sign over the garage door. "House of Rotary".

[@jeremyhoinacki9629]

Every bit of this is interesting! I love the CNC, the dowels, and the look on your face. Great job team Dahm.

[@montanamatt7413]

Over the years I've followed you I am learning more from your experiments and your personal experience building these cars than I have from researching and watching other videos on rotary engines. Awesome work on everything, its all very exciting.

[@OuchesVonDoom]

Rob Dahm should collab with This Old Tony

[@KRYLONcommando]

It should be Abom79 then all the tolerances would at least be more precise and it would take less time milling everything because rob could definitely learn a lot from him

[@robwigglezz944]

I dont think disembodied hands can drive a car?

[@user-gx1sv3hj9k]

47:13 **Proceeds to take a sip**

[@chadgeary2653]

Rob. You put this shit together, doing techniques no one has tried before. It runs beautifully. I change a wiper motor on my 95 dakota and I'm absolutely amazed the thing even starts afterwards. You're an inspiration my dude.

[@That_Stinger_GT5]

This is super informative and I love that you take the time to break everything down to us. Im stuck home with covid and this definitely helps make the time go by better 👍

[@OriginalMomo]

“This is ... pod racing “... 🤣☠️🤣

[@GimbleOnDew]

Day two asking to actually complete* the four rotor. *properly tune engine AND suspension for quarter or half mile

[@RobDahm]

Going back to 4 rotor now that I can certainly machine a spare block. In case I blow it to pieces with more boost

[@Ant_Man211]

@@RobDahm can’t wait

[@mattconway8900]

Awd 4 rotor in gonna be so snasty with all this new dowel tech

[@xploration1437]

@@RobDahm Audi R8Rotor

[@AnttiBrax]

@@mattconway8900 The 4-rotor in Ahura already has these dowels (actually better ones as they're designed into the billet plates and housings instead of retrofitted to stock parts).

[@bigdaddy741098]

Your enthusiasm and excitement is amazing to watch. I've never watched any rotary content at all until your 4wd 4 rotor, I don't understand them, but watching you learn machining and engineering to build this different and stronger than usual, is a little bit addicting and inspiring.

[@johnsimons6748]

This was actualy the first time I saw an complete engine assembly of a rotary engine. Must say it was quite satisfying to watch. And as a bonus you added the startup and drive. Great content and you are a great ambassador for the rotary engine. Loving it! Greetings from Holland PS in the commentsection I discovered that this was almost an hour of footage. When you don't realize you just spend an hour watching something, the content was realy good

[@aserta]

Since this whole affair is an exercise in automotive self pleasure, if it were my project, i'd swap all the bearings to double truncated cone roller bearings. Expensive, but they last a hell of a lot longer than any other bearing for their weight class. And if they're arranged in either the tip in or tip out variant, they also work as thrust bearings.

[@CaptainXDFalcon]

2023: "Making my own oil!"

[@dahei870]

This is so good. Nothing major went wrong and it is unbelievably satisfying watching something go together so easily. It's a testament to what you did here. Nice job man.

[@braedye3535]

In depth videos like the last couple videos are really enjoyable to watch and I’ve been learning so much, ty rob

[@AlexPagliro]

I LOVE YOU ROB, ILL BE SIPPIN ON MY AHURA OIL FOR THE NEXT 54 MINUTES

[@AlexPagliro]

BRUH NO WAY YOU LIKED MY COMMENT

[@tanaseav]

as i am writing this comment, the engine is already dead :)))

[@Trippers5]

This is awesome stuff!!! Love the long format too

[@hambo6713]

A downright inspiring video. Have never been more excited about Rob's journey than now. Plus the nostalgia of seeing that 3 rotor run is awesome, back to the foundations of this channel

[@KooKL4]

MEOW???

[@xploration1437]

Yup, meow.

[@Poizdrc]

This is the first time, in a long time, i really just didnt want a video to end. Its crazy how self sufficient you are now. Sick.

[@jimmybal10]

great video love how you actually show us everything about rotary !!

[@GutZ_47]

*WHY ARE YOU NOT TALKING ABOUT THE RPM ACT, AND HOW THE EPA WANTS TO TAKE AWAY OUR MODIFIED CARS! WE NEED EVERYONE IN THE CAR COMMUNITY TALKING ABOUT IT*

[@RobDahm]

This video was filmed 3 weeks ago I think. I’ll be covering it for sure

[@GutZ_47]

@@RobDahm bro, u responded. Fangirling rn.but yes, thank you so much. Now we need hoonigan, and cleet to get on this!

[@763jtc]

you're amazing rob. thanks for the video in so much depth. love the workmanship

[@abdulelali8660]

you my friend are an inspiration ! i love how any job can be done yourself even if it means failing a few times before getting it right. Knowledge is priceless and you can never have enough of it !

[@alexmushroomfloki]

Just yes..right! I’ll watch this stuff all day Crazy therapeutic rotary build chill vibes Thanks Rob

[@cmprodutions]

I love how much content you've been pumping out recently.

[@Harold_That_Guy]

Great stuff man. Thanks for sharing the knowledge about these magical puzzle boxes as you learn and figure it out.

[@KgiMedia601]

Its really awesome watching you drive around w ur buddys in your wrapped lincoln and having hub caps fall of it. To watching you learn and fully takeover all of the machine work and hand make and machine all these parts w such perfect tolerances

[@leviervin197]

This is one of the most exciting videos. It's just the start of amazing future plans! Hell yeah man congratulations!!!

[@jrgenrafaelsen1413]

I love your work rob. I work as a cnc machinist welder and mechanic at a shop and you litaraly do everything i love. So fun watching your videos would love to visit your shop one day!

[@ThEASbO]

Oh man! I loved this and can't wait to see what you have in store.

[@greggo7978]

The way you explain your build and display all the minor yet just as vital points of the why,what,where,and hows involved in order to accomplish the desired results when performing the surgery of assembly needed had me absolutely glued to my phone and caused the absence of proper period placement in my comment that only someone with the lung capacity of a Sasquatch could read in its entirety without blacking out. It was easy to diagnose my ADD,go figure eh.lol Love your delivery, I wish you were my shop teacher,heck I may be fifty years old but if you want to adopt me I'm o.k with that if I can learn what you know. Have a great day brother,bless you and everyone else here reading this.

[@Disturbed0neGaming]

The joy I see in Rob and the rest of the guys when this beast started up and idled properly is just awesome! I can't wait to see what this 3 rotor does!

[@vEAGLE5]

I don't work on cars often just regular maintenance but I love watching these videos and learning about rotory's! Thank you for this entertainment Rob! :)

[@internetperson8146]

Small things make people happy with projects. "I turned the wheel, and it turned" -Rob, with the happiest face on the planet.

[@AKLS]

I see 54 minute video from Rob Dahm. I am HERE for the long video. All knowledge no BS!

[@gabrielbilek]

Tanks Rob for posting those amazing videos i was frustrated cause of a little nitro engine that i can't make it run and started feeling sad. Your videos just bright my day. Love your passion and hope you keep on with the amazing content.

[@TheJacobGantz]

Really like the long-form video. It was great to be able to follow the whole process in one go.

[@spicyvelcro]

I just found this youtube account in the recent weeks, i am loving the content. Great quality keep it up!

[@brandonbellacima66]

So sick 🤘🏻🤘🏻. Love these longer vids. Keep up the great work Rob !

[@dobermanracing]

This is some of the best content I've seen on KZbin. Hour long is even better. 👍👍👍

[@robertsimondds4929]

Respect to you for actually doing all your own work with your team. Congrats on bringing her back to life!

[@mattrenegar476]

Amazing video. Beautiful editing. Sooo awesome

[@josephmatuszak3855]

Thanks Rob (For showing other folks about the importance of alignment stubs vs bolts, and other important aspects of rotary building) Please clearcoat that toasted back iron and display in the shop!

[@mugen3426]

So interesting, Thank you Rob. Greetings from France

[@nekozabuza]

I was sitting here like "gee this video seems long" got done watching it and looked. 54 minutes. WOW. LOVE IT. And that sound......

[@tkskagen]

CONGRATULATIONS on this Rebuild and WORKING Power Steering! 🤘😎👍

[@trackandstreetracer7359]

Thanks you kind Sir. Two videos in one week. Love you Dahm.

[@smudger6461]

Fantastic man great work from all you guys

[@Tarwarz]

Just as a "kid" myself (18) I have always loved rotary engines the sound, the way they work and the rx7 you got there, watching you put this thing all together each little part of it brought me so much joy in just thinking what if one day I did that or what if one day I get to own an rx7. Overall man I love the videos you make and how you go so much into detail about everything you do keep it up and I am really excited to see where this car goes from here!

[@Tunerguy21]

So good to see the 3 Rotor taking proper shape. Can't wait to see it get tuned and dialled in. Love it.

[@coreylane8690]

Rob love this content and your enthusiasm is awesome and makes it so much more entertaining to watch. Keep it up! And thank you for giving me something to watch in the hospital waiting for my first child to get released Monday!!!

[@omszee1]

Awesome work and determination, i enjoy watching your videos, i also have a 13b in a Mazda b1600..running a adaptronic... thumbs up to you for sharing your joy and accomplishments and failures and its all a learning curve..

[@TPGDSM]

that whole hour of the dahmpound! i could get used to that for sure!. Congrats on getting it running.

[@nathangibson5987]

Honestly never watched more than 45 minutes of a video hefore on youtube but I finished this one, love the content

[@austinseber9953]

I've been watching your channel for years and absolutely love the direction it's going with you transparently talking about how you build engines. The technical content and longer videos are an excellent format as well! When will you be building and selling rotary engines?

[@PRANKurFACE]

Anyone who has ever had a passion for something in your life knows the amount of stamina and drive to get it done. You can't sleep. You eat really fast. Just to get back to work. Rob really loves what he does. And it shows. 🔥🔥

[@meekosaurusReX]

been watching for a while but not consistently until lately, just got a FC and watching your videos makes me even more excited to mess with it!

[@amarriza8807]

The amount of information Rob shares 😍 simply loving it.

[@ragemodeonline7778]

Slowly becoming a learning/build channel and I am loving the content Rob. Keep up the awesome work dude!

[@ziadkabbani4479]

Love how you been spreading all your findings and all the knowledge you've been acquiring! Big ups to you man. All the machining content and engine building has been great! Also new rear fenders on Ahura???

[@yleers]

loooove seeing your video all day long ! thanks and good luck :)