Update on The 12 Rotor Rotary Engine

A few months ago I posted a video talking about how many rotors a rotary engine could have. In that video I mentioned the current record holder, a 15.7L 12 rotor rotary engine which the world hasn't seen much of since 2015. Well that's all changed now since Rob Dahm recently uploaded a video where he and the builder, Tyson Garvin, broke down the engine and how it was built and are planning on pushing this engine to it's limits. Make sure to check out Rob's video here: • I WAS GIVEN THE ONLY 1...
#rotary #rotaryengine #mazda

[@JordanPerry-x6i]

The final boss of the RX-7 community

[@sneakythor2353]

Mazda RX-7 community?

[@lordjasper1988]

Rx-12?

[@NibNa5ty]

​@@lordjasper1988beat me to it lol

[@EwaoRq]

Rx-14

[@dean170]

Does anyone know when the rx-15 comes out?

[@BoosterBear]

"Let it burn a little coolant, im not taking it apart again"

[@threadtapwhisperer5136]

Ah, my own method of small block/chevy lm7/ls1 style v8 engine maintenance. If there's oil under it, there's oil in it, if the oil gauge shudders it needs a quart and if the coolant temp stays around 120 degrees, 8t needs more coolant. Else? Beat the brakes off her. 😂

[@ToloBoyo]

This engine probably gets negative fuel economy

[@cnr_0778]

So it sucks fuel out of thin air?

[@isickofit]

Gallons per Mile.

[@exerosis5758]

Even robs 4 rotor is gallons per mile, this thing is drums per foot.

[@chunkymilk1288]

@@isickofitgallons per foot

[@justincharles6585]

Well it was in a race boat and worked well

[@drewdalesandro672]

I just watched Rob assemble it yesterday. Its going to go big. 900 lbs of pure madness.

[@chupacabrito]

that's actually kind of light to be honest...

[@GiDD504]

@@chupacabrito I just learned about an F1 Judd engine and it blew my mind. A V10 that weighs only 320lbs. WUT!?!? 🤯🤯🤯🤯🤯🤯🤯🤯 that’s just doesn’t compute in my head lol

[@rossiwilton]

​@@GiDD504and the judd wasn't even a " proper " worx engine really. Some worx engine's were under 100 kg thats less than 😓 err 220 lbs ! Off the top of mi head cosworth cr10 was 1 .

[@breckr1121]

yeah he just put 3 turbos on it

[@TrojanLube69]

Fuel economy rating: Drums per foot smiles square

[@greyreeves1295]

Fuel economy: No

[@Xsiondu]

😈

[@kurtasee2314]

Lmaoooooo

[@ahha6304]

Gas drinking : a gallon per yard

[@mreeenigma-4101]

One mile per gallon.... 50 gallon tank 440 pounds... Super hard suspension....or competition for dragster small tank...killing it a quarter mile at a time SWEET❤❤❤🎉🎉🎉👍👍👍👌👌👌💪😎

[@fullmindstorm]

“2,000 horse power Naturally aspirated” 🤯

[@hmcredfed1836]

you gone suffercate if you go tu close xD

[@jarekhornbeck]

Fr that’s actually insane 👀

[@Black__hoodie]

How much power y’all guessing for when it’s under boost 6,000 hp 🤷

[@fullmindstorm]

@@Black__hoodie I wouldn’t doubt it, the parts better be strong enough for 6,000 though.

[@Black__hoodie]

@@fullmindstorm probably not if it’s all aluminum

[@jkay_]

Put it in a miata

[@Birb_of_Judge]

Yes please

[@hudboys8120]

I agree

[@ohyoufr]

a honda fit

[@felixsantiago5606]

It doesn't work that way. Tiny car , big engine. Basic math says that it doesn't work. That engine needs a mid engine chassis. Kit car. Otherwise its will not fit and work properly.

[@jkay_]

@felixsantiago5606 hey liberal no shit it was sarcasm

[@GrandmaNUT]

"It's stock bro, I promise, literally stock" 😂

[@yjkader]

Well there is no production version, so yes it’s ‘stock’ to the owner 😂

[@Matt-pm5py]

“It’s not even boosted bro”

[@TakeNoShift]

Hope he puts this monster in his Lincoln Continental lol

[@michaelh.1262]

Lincoln is probably getting the 6 rotor, but maybe.

[@TakeNoShift]

@michaelh.1262 I guess he was joking but I thought he said he was putting the 6 rotor in the Diablo 😅

[@ImKairyu]

@@TakeNoShift he said he would get a roller diablo if he were to do that

[@TakeNoShift]

@@ImKairyu I doubt that's easy to find, but maybe he could find a different chassis entirely to put the 6 rotor in. For some reason now that the idea of the 6 rotor going in the Diablo is in my head, I really just want to see it in an exotic chassis.

[@ImKairyu]

@@TakeNoShift ive always wanted to see it in a viper, but mid engine might be pretty crazy.

[@richardbrowne3641]

Rob Dahm is rebuilding the 12 rotory engine. I have seen his videos. That engine weighs in at 949 l.b.s.. That weighs just as much as a Dodge 426 HEMI V8 engine.

[@pauldharmer]

More like twice as much

[@neilchilders5442]

I want to hear how this thing sounds. I bet it's a crazy sounding machine.

[@fieqakim]

Just find the videos..there a videos where the owner of this engine doing burnout and price for this engine..half million😊

[@The.Drunk-Koala]

kzbin.info/www/bejne/h2Osd4qsmr51iNU

[@Ferrari255GTO]

Just you wait, Rob will be testing the engine soon as it has been recently put toghether

[@Ferrari255GTO]

​@@fieqakimyeah, the amount of small parts like seals and stuff makes the engine a nightmare to work on. It has like 3/4 gaskets per tri rotor housing, and it has four of them.

[@fieqakim]

@@Ferrari255GTO i already watch this engine inside a rx7 that doing donut and burn out..the owner or maker of this engine is maybe delete or hide that videos..and that videos is like 6 or 7 years ago where the builder talk about this engine and how it fit inside of engine bay,what is the price and much more...this is times when rob dahm or mazzei formula is still unknow

[@tomking7080]

That engine is insane. The amount of man hours spent had got to be up there. I love rotary engines,my dad had 3 different RX-7 and a RX-8 growing up and I loved those cars

[@angrychef9693]

Ive been on the track with the 6 rotor from New zealand. The sound when that thing just flys past you is insane. The only thing that comes close is oldschool 90s formula 1 engines

[@dmite1254]

One of the very cool things about this engine that the temps aren’t as high as you would think

[@rjaybruhh]

*_Im so glad the rotary legend finally got this engine!_*

[@grey5135]

KZbin needed something like this it was getting kind of stale. Now I got something interesting to follow.

[@dogi117]

Yup it hit 2k hp on just 4k rpm and there's 6k more to go 😏😏

[@link2g715]

Honestly don’t think they would be able to get it over 7-8k before it overheats. Sadly 12 rotors running 10k rpm would produce Way too much heat for anything to cool😢

[@dogi117]

@link2g715 false, there's way way bigger engine's and don't need that much of cooling. this engine was well built with intentions not to overheat 😏😉 and there's even more room for cooling 😎 👌🏻

[@gabbermaikel]

@@link2g715 the thing is running a constant stream of cold water through it unlike a normal car where you are limited by the capacity of a colling system. This was build for a boat. However the 2k hp thing has been prove to be false. The builder has said that in a video of rob dahm allready. And how should that thing even produce 2k hp? It is using mazda rotors, so that means its prettymuch 6 13b's together. If we take the highest claimed hp for a n/a mazda rotary then we would be look at around 1400hp. Now we might lose some internal drag losses, but there is not 600hp gained in that. And yes there are ways to get more power then mazda did. But i dont think this 12 rotor has insane port timings from what i have seen. So there is no way this thing would be running prettymuch 330hp n/a 13b's. To even get 330hp from a naturally aspirated 13b you are allready looking at peripheral ports wich this thing clrealy didnt have.

[@mitchhifi9192]

The problem isn't just heat, it's engine harmonics, a rotary can rev high because it's essentially counterbalanced by the other rotor. Having them in that configuration may lead to engine harmonics that could break the engine if revved to high, id be surprised if it ever reached over 6.5k

[@600wheel]

Yeah that’s bullshit even the builder says so

[@andrehooker3229]

Mr. Dahm's awd rx7 is going to be even more beast

[@cgray5559]

Rob's got it so something is going to break in every video

[@manioso77]

Best of luck brotha, it will soon fly and be the engine that takes us into the sky 🌌

[@robertnault5865]

Every piece of that engine looks like jewelry!! Seriously beautiful and awe inspiring 😊😊😊😊😊😊😊😊😊😊😊

[@demonic477]

Rob just did a full rebuild video on this engine . it's so damn complex it would make anyone rip out there own hair just trying to make sure it's timed right .hopefully in his next video we can see it running again for the first time in years. wish him luck this engine is a pain in the ass but it's in the right hands.

[@thomasmleahy6218]

Their own hair, over there.

[@ThrunRC]

Runs so smoothly 😍👍👍

[@robboss1839]

I learned of this engine from your video and got so excited when it was delivered to Rob because I knew what it was. The breakdown was so entertaining to se the quality of work that went into that.

[@goosenotmaverick1156]

Mechanical masterpiece still feels like somewhat of an understatement. Lol that was a fascinating video

[@Emira_75]

In that exact video, Rob says the people claiming these crazy dino specs and potential 5000hp are chatting bollocks

[@brotherzolix]

Maintenance gon go crazy

[@dswofford22]

Could you imagine doing apex seals on that thing?😂

[@liamcooper5202]

Sounds like a "not my problem" 🤣

[@DavidHalko]

Rob mentioned during the rebuild that the engine goes for about 300,000 miles, in marine applications, before apex seals need replacing… those apex seals were amazing! 😅

[@90scottyboy]

Can't wait to hear it running and see it in something

[@BurchellAtTheWharf]

What a freakin beast of a boat motor

[@spedracer55]

thats what it was made for lol

[@Nizizombie]

This sounds like an amazing project!

[@titahibayflier3160]

It only ever made around 300hp as stated by the builder and owner of the engine on rob dahms video.

[@lucasseal1]

what it HAS DONE and what it CAN DO are 2 separate things.. key word: "capable"

[@captaintoyota3171]

​@@lucasseal1exactly, people seem not tp understand we know via physics the fuel, air, weights, barometric press, etc etc to calculate the power an engine COULD pit out perfectly optimized

[@latchkey98]

Nu-uh

[@davidsellers3639]

That’s why nothing else was herd?

[@samuelsandoval898]

Probably in idle 😂😂😂😂😂😂😂😂😂😂

[@kazefw3834]

A 12 spinning Dorito engine, what a time to be alive

[@zonarzegnetrin4612]

That’s a lot of really fast spinning Doritos

[@jasonmartinez9545]

I don't even know anything about rotaries but I watched that whole video fr

[@markholmspielvogel2881]

All 60 secs of this short? If so, kudos

[@mikhail2400]

I wonder if that would fit in my 2001 Wrangler

[@khaho1756]

Def would fit in my 2005 miata

[@Xsiondu]

It bolts up to 454 mounts from what i remember

[@tartopom2669]

Perfect engine for offroad use 😂😂

[@thatdude1435]

Oh the treehuggers are gonna LOVE this one..! :D

[@LSCBTHEWAVY]

Everybody loves Rob he's such a down to earth guy and is very smart as well I think that he is the best suited for this build and I think we're all excited to see what's to come

[@craxy7546]

Such a sick dude I met him in 2022 in Colorado for my birthday by chance too lol it was such a cool meet

[@weichi_]

rob dahm is a legend

[@joshroi8610]

No, he’s a little kid wannabe of the car community that you children watched enough that he could afford anything at all. That’s why he’s been borderline facing bankruptcy through it, even crying on video about how he couldn’t afford to finish the 4 rotor time and time again. Took him 10x longer because of that.

[@user-bq8qq1vr5c]

​@@joshroi8610bang on dude. He's a rotary fan/enthusiast at most. To this day I still don't get why these kids swing from Rob's nuts so hard

[@braddavidson3568]

I'm an American v8 power guy, but that is the coolest work of horsepower art that lve ever seen. Beautiful. Awesome, ld love to hear it

[@prematuredgravy8033]

Rob Dahm is the hero we didn't deserve but desperately need

[@karipaturketo5438]

Throwing around the hero status . Next just need to put out the trash. Your legend. 🤦‍♂️

[@prematuredgravy8033]

@@karipaturketo5438 your grammar was so subpar that I genuinely don’t know what your point was

[@CodyBrooks-jc4vb]

I'm literally gonna subscribe just because you involved rob dahm in this. 😂

[@elijahlemoe412]

Rob is a rotor motor god

[@rippedup1931]

Nope. PPRE are the rotor gods

[@user-bq8qq1vr5c]

​@@rippedup1931been searching these comments for someone with their head screwed on properly 🙌

[@jayski8987]

That’s some serious talent right there

[@curtiswear1593]

I definitely want to see more

[@Hcscornerstore]

A mechanical masterpiece in my mechanic mind is something thats straight forward and easy to work on lol

[@Super_Content_]

Would be cool if they made a new Mazda with this in if

[@AndrewDRoyappa]

Can't wait to see it (almost) done (we haven't put it on the dyno yet) in two years

[@user-jm1hu1jn8w]

can't wait to see the 5,000 horsepower 👍🇵🇷👍🇵🇷👍

[@richardschafer1911]

I think if they put six turbos on meth inject and three wet kits it may even hit 7or8 thousand with like 6thou torque

[@BlackKWolf1]

put it in a camaro@@richardschafer1911

[@turboclub7658]

Cant wait to see Rob's 12 Rotor Tri Turbo in a vehicle of some sort with AWD laying down 5 second passes!

[@Dreamer3K]

Concentric rotary is the future

[@EdBoi18]

I don't think so. I just looked into it. Still seems to have the same problems the wankel rotary has and then some additional problems to go with it. The apex seals are still attached to the rotors and then the shape of the rotors will lend itself to some excessive NVH unless counterweights are used, which is far from ideal. The Liquid Piston engine seems to have solved all the problems of the Wankel rotary, namely the fact that the rotor seals are located in the rotor housing which means they're easier to lubricate.

[@Dreamer3K]

@@EdBoi18 like i said Concentric

[@robowolf3748]

Those turbos are beautiful.

[@ThEASbO]

Daddy Dahm is the best

[@thomaspatlan1751]

Can’t wait to see its potential realized

[@melzacmocciola9509]

Rob is a badass mofo

[@person390]

I do remember that KZbin short and BAD ASS 2000 PLUS HORSE 🐎 POWER .. BIG FAN HERE...

[@visegripmechanic973]

Im looking forward to seeing this!

[@jarbeefis]

I wish Rob can somehow make this thing fit into a heavily modified wide-as-fuck RX-7 and race a dragster. That'd be *AWESOME!*

[@Blanco_Brad]

Rob Dahm gonna be slaying it.

[@BIGGELATO]

A quad turbo setup would be the way to go, similar to Bugatti with 2 smaller turbos for low to mid range power and the 2 larger turbos for mid to high range 💪💪

[@victoryfirst2878]

WOW WHAT AN ENGINE FOR SURE !!!!!!!!!!

[@smdsnowflakes5107]

Men are awesome for creating these beautiful machines 🤯

[@zackringham5164]

Rob is just the most polite car guy ive ever experienced

[@nerdedkyle3515]

Just watched a 1hr and 20 min video that rob put up on it the other day

[@paulczeszynski5103]

Would love to see the engine after it finds it forever home. With it having Chevy big block dimensions and even the mounts and transmission housing I believe were Chevy big block bolt pattern so the possibilities are endless, but if I remember correctly it was going into a boat.. what ever it is installed to I'm sure it is an epic machine in design, performance, and beauty..

[@jaimiestroomer1107]

Hoping Rob puts this in his indycar thing

[@NotinterestedHanna]

I like your videos bro keep you the good work my dude

[@markoverton5858]

That’s impressive like to see more of this engine and what it’s going to drive

[@Ferrari255GTO]

He needs no luck, he's the legend with knowledge and skill

[@zupra5638]

Rob dahm look like proud uncle seeing that beast

[@Brock_Landers]

Bro, leave it to Rob to boost the absolute SICKEST Wankel Rotary engine ever built! SO many people doubted him when he built his 4 rotor AWD FD RX7 and kept talking crap about him, and I was one of the only people who was seriously optimistic about it and I kept leaving him some of his only positive comments and I was doing my best to help support him and it turned out to be an absolute MONSTER! Even his 20b 3 rotor turbocharged RX7 was a 1000 whp monster.

[@RockPowerUSA]

You have to watch today on Rob because 3 days ago he started building a miracle and maybe the next time we'll see that thing humming in some new sounds from the incredible 5000 horsepower 12 rotary. It looks great and take a visit; that was a butch* to build.

[@andyharman3022]

Great concept for an engine. Think about it: 12 40 cubic inch rotors = 480 cubic inches of Wankel displacement, which is equal to 960 cubic inches in a 4-stroke reciprocating engine. But looking at the water cooling holes around the rotor housings, I'm skeptical that the engine would be durable if it was run at high power for long periods.

[@stillkeepin1]

That crucial Compaq screen.

[@mr.sir.]

6000hp is the same HP our GE AC6000C locomotives put out, which is insane. Granted a diesel has torque, and these have enough to shred six inch steel plates, but the HP rating being the same is amazing.

[@earl8590]

Crazy vid would love to see more

[@tysonatkins2236]

My name is Tyson, and I approve this message!

[@michaellaruccia8854]

I’m getting chilllsss god I love rotary engines

[@baggszilla]

Dude Rob is the man! I can't wait to see what this beast can do!

[@markrodriguezjr8553]

Rob is crazy

[@johnelliott7375]

Would love to see this finished.😊

[@TheDeanGullberry]

Dang that's a really rotary rotary. More rotary than other rotaries.😮

[@dagreekratking4694]

Been watching Rob for a while he always does cool ash shiz

[@user-kv6xu5lx1o]

looks very heavy. amazing none the less

[@Hitman-ds1ei]

Its hard to classify this piece of amazing engineering and the guy who dreamt it and made it a reality

[@HeadHonchoMofo]

I just watched a video showing Rob Dahm building this 12 rotor motor

[@Th4thWiseman]

Rev's up into a torque monster 💪

[@derpaderp6642]

Holding that microphone is super cool.

[@diegoanselmi6060]

This could finally be an engine capable of fulfilling what the Devel 16 needs

[@Cadence1986]

Think about it, if a 2 rotor is effectively a 6 cylinder because of the 3 sections per rotors. This is equivalent to a 36 cylinder engine. Strap 3 v12’s to each other.

[@brytonmassie]

An LS sized rotary, absolutely insane and beautiful.

[@boqueefya3623]

Was just waiting for rob to be somehow mentioned

[@jestosebno666]

Rob Dahm became a legend ❤😂

[@C0DG0D22]

I can’t wait to see this done in 2041

[@JohnBrown-ig5nc]

We'd better get a continuation of this series about this engine

[@mickdabz]

this thing is nutz putting down locomotive horsepower.🤯

[@D_Wave]

Reminds me of the Devel 16's V16. Made the 5000hp it promised, just never had a car to actually put it in.

[@Stolas1777]

“This thing is a Mechanical masterpiece” **Breaks down after driving for ten minutes**

[@larryworkman1689]

❤️❤️❤️🎯🎯🎯💯💯💯 yes we want more!!!!!

[@kevinAPapaof2]

Rob has video of him building it, I think video came out last week.

[@jerryfreeman8587]

He said this was first mentioned 8 years ago and this is the first time I’ve ever heard of it