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

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Rob Dahm

پیش 5 ماه

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Jason Monahan
Jason Monahan پیش 12 روز
Just WOW..
A- XISTH پیش ماه
what for a software do you use ?
Alex hogg
Alex hogg پیش ماه
Can you not angle the inlet and outlet to allow smoother flow
Steven Evans
Steven Evans پیش 2 ماه
you had me at CFD. i was trash when i tried to pick it up. shit is cool AF. get to have proof of theory for a fraction of what it would have cost back in the day
Christopher Snyder
Christopher Snyder پیش 2 ماه
@Rob Dahm i've been told by very experienced machinists and engineers that solidworks has alot more features than autodesk and is alot more compatible with mastercam which is what i've heard is prefered software for haas and other cnc's maybe i was told wrong but you're a smart guy maybe you already did this research
Arf omr
Arf omr پیش 2 ماه
How about dividing the tube up into 3 equal compartments. Top middle bottom. That way it divides incoming air equally
jet guy
jet guy پیش 2 ماه
Interesting subject...most heat exchangers lose the majority of the pressure loss in the manifold and plenum, and very little in the core itself...if had more space to work with, a more effective plenum could be fabricated....the original design with the plenums on top and bottom could actually be made to work better than those side plenums, because the flow has to turn less...but the two pass is never as good as single pass...a thick core with top and bottom plenums would be the best design...
iiNgONYaMa پیش 3 ماه
Did you think about rounding the edges of the intercooler to reduce "drag" to internally?
Justin Rivers
Justin Rivers پیش 3 ماه
Why dont you set the inlet and outlet at less of an angle to the core? Is that a fitment thing?
Teo Senečić
Teo Senečić پیش 3 ماه
Could someone ehxplain this to me a little bit better because it seems like he skiped some parts.If the surface area decreases and the speed increases shouldnt the preassure be the same?
BoilerBloodline پیش 3 ماه
787B Jr. Absolutely incredible!
The Godless
The Godless پیش 3 ماه
I love these guys, they're like those kids in school who said "we're gonna build cool cars" and they did it 🥺 i hope my kids turn out like them
John Clifford
John Clifford پیش 3 ماه
heard of locktite
S Moorley
S Moorley پیش 3 ماه
That intercooler was way too small for that set up
Travis Whisman
Travis Whisman پیش 3 ماه
Very informative but could you also move the inlet and or outlet towards the middle not just top to increase the flows performance and reduce air pockets
Keith Sise
Keith Sise پیش 3 ماه
Bernoulli's equation, my dude.
jimmie harrison
jimmie harrison پیش 3 ماه
Sweet so what’s up with that other intercooler
Leo Mele
Leo Mele پیش 3 ماه
I really don't like these crew of audience that keep giving comments like you don't know what to do or making the reason of why you're doing this. I don't even like that you have a 169 haters always disliking your videos. What's going on with this world. Only thing I have to say is keep it up and I know you're doing this for fun. take care brother. For me you just a guy with a Puerto Rican heart just loving rotaries
in motion
in motion پیش 3 ماه
I want to see it out driving fast
in motion
in motion پیش 3 ماه
When you gunna take it to a race track
Kyle Heitzenrater
Kyle Heitzenrater پیش 3 ماه
anyone know exactly which cad he used? Just fusion 360 or full program?
eric jones
eric jones پیش 3 ماه
I've said it before but this is the sickest build on IRpost!!
Sean Gallagher
Sean Gallagher پیش 3 ماه
Sounds amazing
Joseph Acker
Joseph Acker پیش 3 ماه
Is nitrous going to be added for spooling up turbo and exhaust cooling or spraying it over the charge air cooler?
Emotional Content Media Unltd.
Emotional Content Media Unltd. پیش 3 ماه
Never use squares in fluid dynamics. But engine people never listen. You dont really use science. This is pretty close. You could change all fuel systems the same way. It spirals. And you encourage that flow dynamics increase. But yeah. Its so funny to see such backwards science hahahahaha
Emotional Content Media Unltd.
Emotional Content Media Unltd. پیش 3 ماه
Controlling the pressure differential can increase evacuation.
Liam پیش 3 ماه
Love how this started out years ago with him knowing relatively little, paying other people to do it all for him, but now hes taken the initiative to learn and is doing a lot of the shit himself. Wish i had the motivation of this man hahaha.
Speedstar پیش 3 ماه
Almino is course absolution.
Kaneikins پیش 3 ماه
doesnt sounds like a tie fighter... sounds like more a pod racer. In future videos I better hear you say 'now this is pod racing'
daron greaner
daron greaner پیش 3 ماه
Rob,4 wheel drive drag truck !!!!!!
Ben Woolmer
Ben Woolmer پیش 3 ماه
Rob, if you look at ductwork systems in some cases they use bends with guide vanes to direct the air around the bends evenly, typically to reduce noise as the air travels through the system. This might help smooth your air if you applied the same principle. It is also a way to reduce pressure loss.
Medium Buttery
Medium Buttery پیش 3 ماه
there is no way on earth you are still working on and making content for this car holy shit.
Michael Burt
Michael Burt پیش 4 ماه
i never understood the double pass intercoolers, having a plumbinbg qualification you learn about the resistance of bends and it passes on to a multitude of things. glad you sorted it for this way better option. also glad you didnt sacrifice the 4 inch pipe and made it oval, great idea. i know its too late now but would welding a curved peice of Aluminium (aluminum) on the inside of the end caps to create a more easy flowing corner?
Luke F
Luke F پیش 4 ماه
You can switch the inlet to constant pressure in autodesk cfd 2019 .... shit never mind just got past the ad
k Sheehan
k Sheehan پیش 4 ماه
Vin Wiki brought me back.
Jonathan Sanchez
Jonathan Sanchez پیش 4 ماه
Square causes dead spots.. Turbulence.. And resistance.
Tom George
Tom George پیش 4 ماه
Wasn't it bleeding obvious when you designed the inter-cooler that straight across would be better rather than dog leg from inlet to outlet. Didn't you research existing inter-coolers and ask the EXPERTS what was best. Rob you are your own worst enemy.... Why not reduce the length of the inter-cooler and do a PROPER efficient chamber at either end, you did say the inter-cooler was over sized for your application. Did you simulate that? Rob you are your own worst enemy....
VariableDust 692
VariableDust 692 پیش 4 ماه
All hail project ahura you know if you know
Madmikescustom Car & vlogs
Madmikescustom Car & vlogs پیش 4 ماه
Treated like a speaker box or a glass pipe or a magna flow realize that when air passes through if it has curvature is inside in left and right direction of flow and they can pass through intermediate passages with holes through it so the air is restricted but not held back completely #Madmikescustom
Rocky Sandri
Rocky Sandri پیش 4 ماه
Rob.. u look like need sleep
Jay Vog
Jay Vog پیش 4 ماه
It really does sound like a whole nother animal.
X E پیش 4 ماه
Wait you finally put the doors back on it?
Carl Achatz
Carl Achatz پیش 4 ماه
Damn, threw your boy under the bus and still posted... Savage..
Fuel Spark Compression
Fuel Spark Compression پیش 4 ماه
Sounds happier for sure
Levi Lueth
Levi Lueth پیش 4 ماه
Can't wait for the next video!
Giorgio پیش 4 ماه
Hope the intercooler was cleaned before it was fitted...
DeathCAP Tsukinose
DeathCAP Tsukinose پیش 4 ماه
One thing left, the 787B idle. Gotta get that P port.
g0nz0 پیش 4 ماه
When not working on a four rotor, Rob likes to moon light as a Police Officer Tell me I'm wrong Rob! Now get your butt back in your office and do your job
Vinez پیش 4 ماه
hey rob did you try place the out on the bottom and the in at the top. seems like that would much better utilize the inter-cooler.
Βαγγέλης Γιαννόπουλος
Βαγγέλης Γιαννόπουλος پیش 4 ماه
Mariana Silva
Mariana Silva پیش 4 ماه
Trying to do algebra at 2am 😂 daaaaaahm that sound😍 🎶 proud of ya
ZachS پیش 4 ماه
Thought of Eminem when I heard Rob mentioned spaghetti 😆
Sean Shorten
Sean Shorten پیش 4 ماه
holy fuck this car isnt done yet? is he ever gonna do anything with it? like maybe... you know... drive it?
Draco WarriorEX
Draco WarriorEX پیش 4 ماه
Oh good, you're going to fix it. I didn't want to say it in the earlier videos, but it sounded like shit to me, I could tell it wasn't completely happy. But, I knew that was just preliminary running, and not fully tuned so I wouldn't hold it against you. Can't wait to hear it running "Happy".
p00lking پیش 4 ماه
How do these models change when you use water?
Jls R&R
Jls R&R پیش 4 ماه
You should call Gail BAnks
Devv Fedun
Devv Fedun پیش 4 ماه
Good lord! turning vanes man!
Joshua Herriott
Joshua Herriott پیش 4 ماه
Gale banks will be proud!
Barry H
Barry H پیش 4 ماه
Wouldn’t it have been simpler to just cut the upper tube off the rad support and modify that, rather than the inter cooler. Also, when you oval a round tube will change its flow too. But hey... gotta do whatcha gotta do ! Cheers from Vancouver 🇨🇦🇨🇦🇨🇦
Kerry Flanagan
Kerry Flanagan پیش 4 ماه
The feed to the internet cooler should of been into the opposite corner to the outlet to get equal flow to all cores
Kareem Bishop
Kareem Bishop پیش 4 ماه
Big intercoolers is a problem it creates turbo lag that dark blue area the turbo is going to try and fill it before the full pressure comes out the other side giving u almost a boost lag or boost spike effect
Kareem Bishop
Kareem Bishop پیش 4 ماه
Why not cutting it again so the entry point is centered
Rishi پیش 4 ماه
IAmCoopa پیش 4 ماه
Hey Rob, those weird velocity tracks look a lot like turbulent flow to me. Sharp edges in the flow path like the entrances to the cooling fins and the sharp corners of your aluminum piece create turbulent conditions. I'd suggest adding either more rounding to your aluminum piece itself or at the very least some rounded metal inserts for the corners. What you lose in volume you should theoretically make up for in less turbulent flow.
Richie T
Richie T پیش 4 ماه
ROB!!!!! You never told us you are a professional actor!!!! You were on [H]ouse MD S6 E20 “The Choice” you played Cotter!!!!
blow0me پیش 4 ماه
With such great fabrication going on etc....why was such a terrible IC designed in the first place ? Makes no sense ? A double pass with lots of absurd turns ? Seems crazy
James L
James L پیش 4 ماه
Seeing the intercooler right before the saw... Every car guy cringes!!! We know its for good but errrmmmm....!
Michael Meyer
Michael Meyer پیش 4 ماه
Looks good, love the fluid dynamics analysis through the inside of the intercooler, you may need to address the outside airflow through all of the radiators and inner cooler and how you're going to manage the air coming out from behind all the heat exchangers as well, that will affect your tuning too. Love to see how you're going to use the volume of airflow from behind the heat exchanger.... more downforce less drag perhaps?..... finish the looks keep it sleek and clean..please don't drift into the Bosozoku style. Stay cool
Lee Huntley
Lee Huntley پیش 4 ماه
Rob weld in a small bridge at the intake of the intercooler to flip the air down
Dumpster Stu
Dumpster Stu پیش 4 ماه
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!
Interesting View
Interesting View پیش 4 ماه
Have you tried the Tornado intake drop in that they used to sell at pep boys? I put one on my F-150 and it gave me 50hp easily. I get better gas mileage too.
Simon Barbarasch
Simon Barbarasch پیش 4 ماه
Hey rob, where did you learn to use CFD? I'm having a hard time finding any decent tutorials and the software is not intuitive
Ezikiem Ortiz
Ezikiem Ortiz پیش 4 ماه
What program are you using for that
Guinness AFA
Guinness AFA پیش 4 ماه
Willing to bet this frees up 500hp.
Joe Anthony
Joe Anthony پیش 4 ماه
who cares,
Mrskull509 پیش 4 ماه
i dont know why, but im so impressed
Robin Lundström
Robin Lundström پیش 4 ماه
not often i comment BUUUT!!! the section with SimpliSafe was the best implimentation ive ever seen. i have some toys and now i want that! system!
Momo پیش 4 ماه
This episode made my brain hurt 😔... but it’s still impressive how much end tank design helps or hinders.
Sean Tansy
Sean Tansy پیش 4 ماه
The dynamics sim is super cool, thanks for sharing Rob
MrPDO77 پیش 4 ماه
Those welds on the intercooler 👌☺️
Jus Ski
Jus Ski پیش 4 ماه
Considering a 2 rotor can hit 1400hp I hope to see a ton more out of this build!
Steve's Shed
Steve's Shed پیش 4 ماه
Rob, this was so fascinating ! I'm pretty sure i would never be able to do all of that math or engineering !. But definitely very cool information !!
Sammiege پیش 4 ماه
Do you also consider laminar vs turbulent airflow for the design of the intercooler? A laminar flow results in more heat dissipation and decreases the resistance. To achieve a more laminar flow, the flow path should be smooth i.e. sharp corners should be avoided. This could be considered for the inlet and outlet. I'm not a mechanic but know something about physics.
Lukas Frey
Lukas Frey پیش 4 ماه
I like your new approach for the intercooler, but you will use only the top part of the intercooler and you have less flow at the bottom part, which reduced the efficiency of the intercooler at more HP. Here is a link to a video of Wagner intercooler and they show insides in their design, they split the intake that you have an even flow throughout the complete intercooler. Very simple but I think very help full: (check 2:40 min)
luelito پیش 4 ماه
I don't understand but will this car ever get it's body panels back on and Shields for for the exposed metals?
jackson dornsife
jackson dornsife پیش 4 ماه
im thinking 13b RWD sonett ii. any objections?
beforebefore پیش 4 ماه
You need an engineer to consult with for airflow.... by squishing that circle into an oval lost you a LOY of square inches for the air to flow through. You need to remember that air flows like liquid... try to envision water flowing around in those angular end plenums... it won't like it. Think FLUID dynamics... make everything smooth curves, gradual changes, smooth transitions, larger cross-section areas where more volume has to flow (at inlet & outlets), gently reduce to smaller cross-section areas when you to increase air velocity to get it to flow into corners (top/bottom rows). If you keep the plenums of consistent volume (like you have it), you will be forcing far more air flow through the center of the core near the inlet pipe, and very little at the top & bottom... it has to taper, but get rid of those sharp shapes! Those squished inlet/outlet pipes need to flare as they hit the end plenums... don't take the easy route... flare those out.
MSS Fabrication
MSS Fabrication پیش 4 ماه
An intercooler that’s restrictive at 1000hp shouldn’t be a restriction at idle..
annon #
annon # پیش 4 ماه
fart in it ! and do a black face
Jerher پیش 5 ماه
As much as I would like to see this in its final form I'm not sure if thats a possibily. I believe he enjoys the journey to much and always finds something better to add on or redo.
RedmistAU پیش 5 ماه
Billet end tanks Rob. Moar BILLET
Hey It's Drew
Hey It's Drew پیش 5 ماه
saying flowable row IS HARD!!
Carlitos7469 پیش 5 ماه
That's what she said lmfaoo
Indiana Diesel
Indiana Diesel پیش 5 ماه
Kinda curious what Gale Banks would have to say about it lol
Joshua Spata
Joshua Spata پیش 5 ماه
What if you spit the 4inch line into two smaller ones with the same volume that way you have a more even distribution of air on the top and bottom on the intercooler
theTIVANshow پیش 5 ماه
@robdahm if you put a air flow divider on the inside the bowl forcing 1/2 to stay on top and 1/2 to the bottom. It would be like a heat shield but used as a air ramp. It's more effective for even air flow .
vantsen nm
vantsen nm پیش 5 ماه
afro delete you look 10years younger
Olivier St-Amour
Olivier St-Amour پیش 5 ماه
Needing advice please contact !!! Thank you in advance :)
Leo Hajibey
Leo Hajibey پیش 5 ماه
Imagine hearing this rip thru ya hood at night 😂😂💥🔥💥
ajmtranz پیش 5 ماه
What app did you use for the (CFD) Computational Fluid Dynamics modeling?
Matthew Gaskins
Matthew Gaskins پیش 5 ماه
Bernoulli’s principle.
Bruno Tavares
Bruno Tavares پیش 5 ماه
Now that you are going so deep and simulating physics: would a circular/cyclone like airflow improve the performance of the intercooler? I love your content and this build, big up for doing this!