AWD 4 Rotor missing 250+ HP at the 1000HP Dyno! We found it with science!

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[@mravocadoman2999]

This man found an extra 250+ hp with this one simple trick, car manufacturers hate him

[@Winglessflight97]

replace "car manufacturers" to "V8 lovers"

[@devon5078]

Miles Davis ls owners*

[@gitonmylvlscrub3828]

Lmaoooo

[@jessecoc6247]

@@devon5078 why the hell would ls owners hate this? It is an amazing thing and ls blocks are able to make more hp for less money.

[@AlphonseJames-FxWorth]

I'll get extra 251 hp on a Nordshlife sticker bruh

[@TierOperator]

Remember kids. This all started because Rob had something to prove to his brother.

[@nathaniel4221]

Who is his brother

[@rams_r_champs]

Nathaniel Williams Obama

[@Gobbbbb]

Lol, destroying his gtr

[@jacobwebb8818]

@@nathaniel4221 @thedahminator or @dahminator I don't remember which one

[@RichardSmith-ic1zw]

Carter Weigand I thought it was Donald trump

[@lynxproductions]

20:50 "There's nothing at this point stopping this car" UPS has entered the chat...

[@codibrown7378]

He probably can't even legally tell you how funny this is 😂

[@SenorFoust]

Codi Brown or that lmao 😂

[@michaelmelnyk3993]

UPS has been fucking with this project since day 1. Shipping competitors should use this project as a marketing tool. Yeah we're shit, but we're not UPS. We wont lose your motor and then sell it.

[@RichieD_21]

@@michaelmelnyk3993 you forgot the quotation marks on "lose"

[@JohnySv]

When the car is mostly done can we get a sequential transmission whine asmr video?

[@djaydeved]

hell yeah straight cut gears asmr

[@dom9193]

Don't forget you're changing your air charge density. You'll want to re-tune it on the dyno with the intercooler!

[@stoneheart9679]

Straight outta cleetus video and your comment is....

[@Brtmyster]

Rob. You should take a trip to PAC in Australia. You've probably been told you should do this 1k times. Just go. You'll love it.

[@xXgaucho]

So what I'm hearing is .... More Dyno coming up?!

[@jahvy]

Rob is positioning Isaiah like how Adam LZ positions Alberto and I’m loving it.

[@shanesgarage1105]

Who tried saying "one flowable row" after Rob said it? 👋

[@RobDahm]

I tried saying it while editing the video and gave up haha

[@TVmadethemdoit]

Me too lol

[@Matty.Hill_87]

Nope 🙄🤣

[@arcadiagreen150]

Oneflobleruh

[@mogesay]

I sure did!!! Tricky one

[@NotnaRed]

Nice Cardboard Aided Design going on there.

[@KartsAgainstHumanity]

A fellow Bad Obsession Motorsport watcher? Woo :D

[@Alejandro-vb2fx]

This is my favorite car that's ever been created from scratch hand's down, Ken Blocks hoonitruck/hoonicorn are in 2nd place. Can't wait to see the C8 finished and the 3 rotor come back to life. Good luck man I've been watching since well before the 4 rotor back when you shot videos about your suppressors.

[@ericpunkkinen5038]

Gang from the beginning!

[@nastyy.8582]

There’s a ton of cool builds going on!

[@daffaalfarizqi4317]

i like it when the engine starts the auto generated subtitle says [Music]

[@pricey0986ify]

Music to my ears👂🎶

[@amirbasssystem]

Love song to my ears

[@victoria-arg]

Thats amazing

[@crossstarling2452]

Finally someone calls it an engine

[@ScottKenny1978]

Proof that someone in KZbin likes engines.

[@zeala53]

God Dahm I love that 4 rotor

[@petergreaney1328]

Good one

[@knowltek]

You need curved ends not sqr conners...more squashed tube please...cad it up to see flow dynamics ...js

[@georgebordman9980]

Yhyh, watching that diagram was honestly breaking my heart 😂. There's so much easy power left in the design of that tube

[@Sun-ut9gr]

Brachistochrone curve ftw!

[@tomgeorge3726]

Rob said the inter-cooler was to big for this application, so why didn't he shorten the cooler and do a PROPER job on the ends... As I said elseware, Rob is his own worst enemy..

[@georgebordman9980]

Yeah tbh brachistochrone is probably gunna get the best results

[@allenfields9542]

I would do 2 to 1. Better flow and distribution on. The in and out of the cooler

[@joemiller3739]

One day in the future I think we need to see this race Leroy in the half mile ..now that will be insane

[@Glasseh]

Leroy probably doesn't like the half mile, not with the drag tires and the fact that it's fully setup for the quarter mile.

[@joemiller3739]

GlassBomb I agree but still would be insane to see .. rob isn’t a drag racer and so to put it in a quarter mile race wouldn’t be all that fair but half mile would be interesting for sure

[@colecampagna6302]

How about the 3/8 mile?

[@shaynegadsden]

Leroy is to aerodynamically challenged for the half mile

[@MrSelmo85]

@@shaynegadsden for the quarter mile even lol

[@kaos33633]

I’m personally a red seal technician in Canada and find videos like this where you get to see the engineering and science behind this kind of stuff. On top of seeing a one of a kind vehicle and build. Rob Dahm keep up the great work. And a bonus he’s real he shows the good and the bad. Hey look this is awesome oh wait we made a mistake but look we got way better results and we all get to be along for the ride way cool. Real guy and you feel 100% apart of it.

[@NeoIsrafil]

I mean, that's cool, but what do seals need technicians for? Their fins get stuck to their bodies? ;) (Obviously just messing with ya)

[@davabran]

When making duct elbows for large ducting we we add internal vanes/walls to help direct flow in an elbow.

[@ozzyoswald2590]

A little bit of masking tape would of covered your other “flowable rows” from getting metal shavings in it.

[@rubenbraekman4515]

Next video: tearing apart the 4 rotor again

[@ionstorm66]

Or you just run it for a few minutes with the outlet unhooked and the inlet attached to the turbo.

[@elyasrasti8943]

@MUM!N that row doesn't work

[@S-Kidz]

"David paid me 1000 dollars so I do have to put metal shavings in there " 😂😂

[@TVmadethemdoit]

"She always asks for that extra half inch, but I cant help her" lol sorry, bro.

[@1GYALLIS]

Hey Rob why not make the entrance pipe a “Y” pipe to facilitate better air distribution across all cores and the exit pipe in the middle of the core... by the way you make the throttle response sound like a dog “woof woof woof” 🤣😂🤣😂🤣😂

[@InsaneGeraldo]

This is a good af idea.

[@WTFShelley]

@@InsaneGeraldo a simple curved metal plate/guide running down the centre of the intake pipe to focus half the air downwards. like a twin scroll turbo | | / | \______ | \ |

[@Me-fj8sb]

First thing it comes in to my mind when they were bending the tube

[@VNM_Arma]

While watching this I was like... hmm yes... “Y-bend?” I am glad to see another brainiac in chat😉🙃

[@Me-fj8sb]

@@VNM_Arma image a rectangular funnel 8" by 4 1/2 ", it would cover over 3/4 of the IC inlet, same for discharge side, but it will require a full scoop in the bumper, it will need maximum air flow thru it , that car will never be a drag car, it's a 1/2 mile or 1 mile race, at those speed the IC will do the job, NOW,. do you think it will do 250 MPH?

[@paulbarks1473]

Sounds like your ability to say "fluid dynamic simulation" is the bottleneck 😄

[@thomashayhurst6547]

'insert breaking bad reference here' "Yeah science!"

[@merletrisch8292]

you found it hiding under the front cover and added it back to the engine lmao

[@elyasrasti8943]

@MUM!N that row doesn't work. It doesn't flow any air

[@elyasrasti8943]

@MUM!N I'm literally a mechanical engineer. I know what I'm talking abt.

[@Jan_Boris]

@@elyasrasti8943 Can you explain why it doesnt flow any air? As far as I can tell half the rows are for the boosted air(side to side flow) and the other half for the air that passes to cool down the whole intercooler(front to back). So all rows are immportant and serve a purpose.

[@danielkanewske8473]

250 hp is more than my engine has total!

[@Dannerrrr]

Adding internal baffles to split the air really help organize the air going in. Split the air in half all the way from the start to the fins. Check out Corky Bell's "Maximum Boost"

[@bakedandsteaked]

Hello Rob, I'm about to start my final year to get my bachelor's in mechanical engineering. Seeing you using CAD and that dynamic fluid simulation to make a change that showed REAL WORLD RESULTS was very satisfying to me. Your car is an engineering marvel. I appreciate the amount of work you and your team have put forward into this car, never cutting any corners. Please continue making great content and I wish you the best.

[@toxicmongoose7061]

By far one of the more interesting videos for me! love seeing the "science" behind why some designs work better than others!

[@TheCapi12345]

I love to see you learn something new about this beast every single video. Excited to see this thing 'finished' soon!

[@brianclarke7221]

This man just gave me more intellect in twenty minutes than a scholar with a double masters in quantum physics/mechanics, fluid dynamics, electrical engineering & thermodynamics

[@maxrudy8830]

Love you Rob. Glad to see some 4 Rotor but I love all you do and love how I always learn something from your videos. Best of luck and stay safe man! Can't wait for more content!! 🙏😊

[@nathank5794]

i love this style of video where you go into details about smallish design decisions with big impacts. I learned a lot

[@nachtpirscher5698]

Rob! Finally you posted ! Super sweet video i was actually really interested in how you explained the flow of the intercooler ! We need more content bud ! Stay safe haha

[@asphelite]

All that work that went into that car

[@dedpix3l]

Love these in depth technical videos, dont be afraid to do more, i enjoy them so much!

[@dumpsterstu4474]

Your 4 Rotor series has been by far my favorite videos to watch. I'm learning welding in school and fixing cars up for a living. I have some totally shitty cars I drive daily Geo Storm and a Honda Civic Sedan. For 15 years I was on a bike with pedals before that. I'm all about the hyper miles and driving all the highways of the PNW! God dahm that 4 rotor sounds good!

[@everythingvinyl]

I love this technical style video! Good work Rob

[@josephhollingsworth5631]

I miss playing with CAD. An watching this video makes me miss it more. Really enjoyed the engineering side of this video and how you broke it down and explained everything. And we heard the 4 rotor as the cherry on top! Looking forward to the dyno day!

[@luinhaden]

After watching your videos I feel so smart. Keep doing what you're doing! Can't wait to see the awd rx7 and the c8 Rotory done!!

[@saloonlife2627]

Love the science of this video. Not had to understand anything like that since my engineering days at college. Nice one.

[@splean9438]

so proud rob is doing cad modeling and showing it

[@michael_graper]

This was an awesome video Rob! You explained everything super well and it was really interesting to learn about.

[@seanissomething]

This was fascinating. I could watch videos like this all day. Awesome car stuff + a little bit of nerdy stuff.

[@rcam9770]

I like that you explain how air flow and pressure in the intercooler works.

[@timmytarsh7713]

Loved this video, learned about how intercoolers worked and the flow patterns and restrictions. Id love to see more educational stuff like this!

[@ElMosqito]

"It's not perfect, but it's ideal" :D 8:00 why don't just tape up sides of the core?

[@howardwilliams1218]

The tank design is strange - Ideal tank is a taper so if say one row of tubes left the tank can be min same internal area , 2 rows of tubes - tank same area etc all the way up to the 4 inch inlet - outlet etc.

[@howardwilliams1218]

We used to measure temp and pressure going into and out of intercooler to see if the fluid dynamic program was correct. If you can get the outlet temp very near ambient air temp with low pressure difference between in and out then that is a perfect intercooler

[@ratgreen]

Yeh I was thinking they could have tapered into the end tanks using the inside curve of a mandrel bend tube.

[@ut748]

This is one of the best videos yet on your channel!!

[@jakesmall3454]

Love the videos rob. They are so informative and technical. I appreciate you taking the time to break it all down

[@TonyPreckwrinkle]

Love these technical videos. Can’t wait for next dyno run.

[@trackandstreetracer7359]

Love you buddy. Month of June need a video everyday. You can do it

[@RobDahm]

Ooo. It’s possible with all the projects going on. Maybe I’ll propose it to the audience and see if they will support the insanity

[@GetShrektMrKrabs]

@@RobDahm if you do you have to do just a little thing with the title to spite cleetus just a tad lol. Month of Freedom was wild

[@maxfastest]

I would definitely be here any time a vid is uploaded !

[@kenkenzie8356]

FLUID SSSIMULATION TAAAA... i love that part

[@Fez135]

Cross-sectional area*

[@imho7250]

Fez135, exactly. Every time he said “Surface Area” instead of “Cross-Sectional Area”, i cringed, lol

[@EricRovelo]

@@imho7250 every single time

[@EricRovelo]

I knew someone else caught it too

[@Stag15L]

i love the shop banter.. one of the things I miss from the car world

[@frostshock13]

The cfd was interesting to see. Thanks for the science lesson Mr. Wizard.

[@TheZumiezNation]

Please do more technical stuff like this, i'm loving it.

[@chandlerfrazier]

You sir are an inspiration. Shows that if you love something enough, nothing will stop you. And i mean nothing.

[@EbolaSquirrel]

16:04 The one thing I remember from class ends up being an important equation in calculating boost gains from different intercooler piping.

[@knowbull5hit590]

Learned alot about intercoolers and air-flow in this video, thanks for the great content Rob. Cant wait to see the RX7 at full tilt on the pavement

[@durrthock]

I'm really impressed with your ability to do this kind of engineering. Nice!

[@josephwelch6972]

What up Rob!! Your channel is getting super Dank!!! Keep the rotor world Braaaaping!!!

[@c.michailidis6808]

Well-done Rob! That's the crazy stuff we want to see!

[@billysharp2242]

I can't get enough of this build rob!

[@nevoyu]

I can't wait to see the completed build take some laps around a track :)

[@1theheightofparadise]

I love these videos more and more. your style of videos are so chill and laid back its nice to watch

[@gardo2492]

This is my favorite video you have made! So much design and engineering going on behind the scene. Is it true it’ll orbit the earth and come back and land itself?!?

[@RobertWeekes]

Rob! Thumbs up from South Africa! Love it

[@dunichtich100]

Another tip that I have for your next intercooler iteration is the following: Put the inlet Side as low as possible on the side of the meshbox. The hot compressed air will travel upwards inside the inletbox and more evenly distributed through the coolermesh. And then mount the outlet tube as far up on the other side as possible. This way the air has the maximum amount of distance to travel through the mesh and thermodynamics will spread the air more evenly. I hope you read this and at least consider it. Wish you all the best Rob, stay safe! ☺️👍

[@lepreseanaz]

The dynamics sim is super cool, thanks for sharing Rob

[@VNM_Arma]

Yesss!!! The moment I’ve all been waiting for... 4rotor rx7😍

[@leb4life11]

Rob knows what the people want to see. Raw car footage of big horsepower cars. No flashy intros or outros.

[@painedinks]

Thats badass Rob! You guys are kicking goals with every update you do on that beast! I'm so excited to see it complete. I live in Riverside and I'm pretty sure your in Ontario? If you ever do an event or something near here or are excepting applications for visitors, I'm there! (Especially since I missed that Irwindale hoonigans event!) The crazy vibrations this beast must put out have to be outright insane, I bet you can feel it in your chest!

[@chrisseger6870]

"Dear Lord. It's me, ya boy Rob...." love it man! Love the videos. Love the projects. Keep it up you guys!

[@glenn9k]

Very interesting! Love this style of video with more in depth technical stuff.

[@Michael-acolypse]

Epic video. Epic discovery of horsepower opportunity. Very cool to see the simulations of air flow.

[@brycekopansky8307]

I do HVAC design, splitters/vanes inside your elbows or airways is the go-to way to keep air from bouncing around. You went the right way by keeping the flow straight as possible.

[@batdognt]

Rob, I was thinking about the same on my dodge... Better flow.. less fuel.. awesome move bro.

[@1BadRAMLimited]

I've said it before but this is the sickest build on KZbin!!

[@MrTylerng99]

I'm going to into mechanical engineering and this video is really making me look forward to it.

[@joehackett9471]

Love the progression of the 4 rotor! Greetings from Mich, Im from Tecumseh!

[@jakesmall3454]

Can’t wait to see it back on the dyno!

[@jonathonhebert7042]

THIS is why this is a masterpiece!! EVERY detail counts

[@joshhand9766]

As a mechanical engineer, it makes me really happy when people figure these things out :) Good luck man, proud of your willingness to learn new concepts!

[@joshhand9766]

next time add some harp sound effects and stroke the core like MCM!!! Chop chop.

[@flarinarms4245]

Proud of you rob, you have came a long way.

[@lordzed83]

You know what Rob ?? Those are one of most interesting videos I'm watching on lockdown.

[@j.conran7279]

Outstanding video loved the energy

[@Ijumpped]

Don’t know why nobody is talking about this but you are really smart and it’s makes you videos so much more enjoyable because of that

[@BaseSRKI]

Love the added thearycrafting up front. HUGEEEE radiator, cool😎

[@BaseSRKI]

MOAAAR TUNING: Hell yea!!!

[@jerkimerjames3545]

Some advice as an engine system integration designer. We have intercooler designs that match perfectly to kilowatt. The Cummins QSX series engines released in the late 90s and 00s were examples where we used full flow intercooler and water-jacketed intercoolers with parabolic curvature.

[@ElegantMessTechPC]

This is by far one of your best videos! Really cool to see some of the genius that has brought this into life :-)

[@BMWMotionE36]

For a minute i forgot i was watching a Rob Dahm video. It felt like a paid online course about a topic i liked hahahaha love your content greetings from Germany

[@dirk_diggler320]

Floorboards , doors and a hood .... Bet she feels like a completely different vehicle !! Keep it up Rob ! Make that legend !

[@ledfootfam99]

So awesome, great video!

[@AMightyPanda]

I just wanted to say a huge thanks to turblown for making so much progress in r&d with regard to rotary engine! You guys keep the community pulsing!

[@terrydunnett]

A lot of people totally underestimate the value of a the optimal sized intercooler for there application, and now you are not only flowing better but your air is also cooler so it is a double wammy. Good luck with your tune.

[@MuchoBoosto7]

One more idea to help free up HP: every time I see that turbo I can’t help but think if you could somehow clock the compressor housing so that you don’t need such an aggressive bend immediately as the air exits the compressor, I think there’d be some serious gains.Keep up the amazing work, I absolutely LOVE this car and these technical videos!

[@AndersonDick]

Love the FuelTech shirt!

[@RobDahm]

Haha if you like the shirt. Wait until you see the ignition solution we are about to unveil 😈

[@haydenallen888]

This is a great video Rob!

[@MrStuwr250f]

Geez, I just came for the flames and revs, left with an education. Dahm wizardry!

[@joshdamiani77]

I love this car so much

[@alex_k1410]

Studying in the mechanical engineering sector, found the autodesk (fusion 360) segments very neat. Can't wait to see how this monster performs on the dyno