How I Built a REAL TIME AWD RX-7. Push of a Button ATTESA

[@nomakewan]

Rob, the “delay” in the R32 ATTESA versus the R33/R34 isn’t caused by the pump or power unit. The R33/R34 added an additional solenoid to the system as a failsafe that allows about 5% system pressure to flow to the transfer clutches at all times. This means the base pressure is 5% instead of 0%. It’s so that if the system fails it won’t suddenly snap to RWD. This has the side effect of greatly reducing actuation time since it also “preloads” the clutch springs. It takes about as long to go from 0% to 5% as it does to go from 5% to 100%. Your pressure loss and constantly having to run the pump appears to be miswiring, incorrect hydraulic routing, or both. There is supposed to be a pressure switch on the power unit that measures pressure from the accumulator (that nitrogen canister), and shuts it off once it has pressure. This accumulated pressure is what runs ATTESA. The pump isn’t supposed to run again until pressure drops under 270 or so, which shouldn’t happen very much while the car is running since the nitrogen canister is maintaining that initial pressurization. The solenoid on the power unit is what’s diverting the accumulated pressure between the accumulator and the transfer clutches. Best of luck with this, it’s been an exciting project to watch!

[@stanley4290]

so much knowlegde

[@CleetusDaily]

Yeah what I was thinking does it actually have nitrogen in it ? can you ship something like that

[@nomakewan]

@@CleetusDaily It does, and you can (new units are sealed). I can't tell if the one in the video is new or if he just did an insanely good job at cleaning the old one that was on the unit he acquired, but in case his is shot, new ones can still be bought online. They're made by KYB, and the part number is 41630-20U00.

[@OutcastAngelV]

@@nomakewan 10/10 information porn

[@thomgt4]

@Reality Lives they don't teach this in college, they (are supposed to) teach you how to think about stuff

[@ad1ldo]

Rob: spinning the driveshaft spins the rear wheels Me: 🤯

[@xalr6128]

groundbreaking discovery

[@louisturner8842]

Lol.

[@PolarArctica]

300 IQ

[@EliteSniperTV]

xAlr for this build it really is 😂

[@1776Redux]

"Watch how hard it gets" - Rob 2019

[@aserta]

Whilst someone else touches his shaft.

[@bglenn2222]

Tinder profile quote of the year! And he's had a lot of them.. lol

[@rosegold-beats]

"it needs some torque"

[@gerasimger15]

aserta yeah😂😂

[@chrisfontanez2450]

😂😂

[@jdmcbr132]

Rob: Watch how hard it gets. Isaiah: Oh my god! 😂😂😂 this channel never fail to entertain and give car content. Best of luck in 2020

[@gerasimger15]

Jovan Torres when he touches his shaft

[@owensparks5013]

I get the feeling Rob won't even look at a girl now unless she has the right AN fittings.

[@TheMofoManiac]

That's how we all feel

[@TheNolannn]

😏😏

[@corzahazard444]

Or all billet lol

[@owensparks5013]

@@TheMofoManiac Ah well if it's all normal and acceptable then it like to find a little something with electric blue anodised highlights, but in metric please, I'm British. 😀👍

[@4wdguydrivesby]

So something like a 6AN?

[@CrashBandicoot0987]

AWD or RWD? Rob: *"Yes."*

[@HolyHamGrenade]

Technically 4wd, since he can actively switch between both

[@Avetho]

So like the AMC Eagle?

[@CombatArmsOwnah]

@@HolyHamGrenade not really because there is no dual-range transfer case. No Hi and Lo

[@jtc406]

long lasagne understand we’re purely talking semantics but given it has a center diff, that makes it “AWD” rather than fixed rotation associated with “4wd”

[@ashy_gee6]

Def enjoyed the video, hey Rob next time on a short slow drive we would love to see how insane it looks inside the rx7 in the driver sest without floor, driveshaft moving, and the ground moving underneath via gopro. Thanks for sharing again.

[@lexus_offroad_adventures]

Wow, Rob Dahm content. Brings me back to November.

[@ianb2722]

TaKe me BAck

[@lexus_offroad_adventures]

Ian B lmao yeah it was good times but I’m definitely glad he’s gonna finally finish this thing. Better late then never

[@MazdaFamilia]

Yeah..nO NuT nOVEmBeR

[@tothethreshold.9965]

@Shin Sho How many things you gonna comment the same shit on, fucking troll.

[@Teknas89]

@@tothethreshold.9965 I know, right? A-hole's going on a commenting spree here

[@mattyb08]

"It's not making tons of noise all the time" Glad you are concerned about making a quiet car! 🤣🤣🤣🤣

[@m8onethousand]

engine noises are one thing, but whining high freq noises are just annoying.

[@owensparks5013]

@Shin Sho Yeah, it's pretty annoying. Should probably replace it with an LS 😉

[@rubenbraekman4515]

@Shin Sho he'll do that later when he works on the body

[@ourlifeinwashington4114]

You're the Original Mad Rotary Scientist. You're a guru of originality when it comes to your craft.

[@mitchelldickinson4161]

gotta get that full time front wheel drive tho

[@dghddvsfbdch6183]

Mitchell Dickinson lol 😂

[@Mark-vn7et]

Individual wheel, doing a sick left side burnout😂😂

[@R3dSmokeGaming]

Mark 2000hp 1 wheel peel

[@owensparks5013]

Why not fwd, it's important to still be able to drift whilst in reverse gear...

[@thatwolffe3802]

When this is finished you need to have doug demuro check out all it's quirks and features.

[@thatwolffe3802]

@@billybobjoe198 lmao no I think we can trust doug to not break the hood or burn it to the ground.

[@augustfossheim372]

that is the dream

[@JohnAWoods-ui3gp]

I support this plan!

[@pyroboobysmith359]

@@JohnAWoods-ui3gp He is too creepy.

[@Beezy_Builds]

@Shin Sho had me dying man

[@jacobwebb8818]

10:50 Pulse Width Modulation* Edit: before anyone comments yes I know daddy Dahm was and is an I.T. entrepreneur

[@s56505]

I think that you should double-check your the fluid. The fluid that was in it when you took it apart with distinctly red. The red fluid is indicative of automatic transmission fluid that is used in some cars as power steering fluid. The fluid that you put in is brown which is standardized power steering fluid there is the difference between viscosity and weight but should still have relatively the same pressure rating but can very much affected the longevity and the life of the pump.This might be some of the additional noise that you're hearing from the pump.

[@Matty.Hill_87]

Your welding is starting to get good man.. About time with how much has been done on this project 🤷‍♂️🤣

[@zombieplant3048]

700k subscribers!!!!! Congrats🔥🔥

[@joshwarnick3498]

This is seriously probably the coolest build!!! Ever!!! I love this I want a switch for RWD or All Wheel Drive that so sick

[@jamesgreathouse1688]

Can’t wait to see this channel surpass a million subs!!! Best content for sure.

[@velysean7031]

I am so bloody excited to see this car tearing it up on the track and/or street. I am also very curious and excited to see how you are gonna do the flooring with how that car is setup

[@dghddvsfbdch6183]

Velysean same its pretty hard to do all that interior, especially without the stock frame

[@codassassin254]

Rob: *online shopping for parts* Item: "has AN fittings" Rob: Sold, American.

[@marcsainz6800]

PULSE WIDTH MODULATION -- I've heard you say "management" in a few videos now lol

[@demonic477]

with all the electronics your putting in to the system I would recommend having a second battery even if it's a half size one to back up all the draw the car is going to see when it's idle or a automatic charging system to keep it topped up .

[@gomilopez1]

NotifSquad! Geeez that real-time 50 to 100 is awesome!!!

[@boost23]

Rob you are a true inspiration keep the fire burning. Love the build.

[@lexus_offroad_adventures]

6:59 “and you can actually..diddle that” .... 🤔

[@extec101]

rob the diddler.

[@JerryHenderson72]

Killen it with the outros as usual

[@joshlove9467]

Yeah I feel like the videos quality is degrading a little bit. I don't really care because what he is doing with the car is fucking awesome. Like the part where he's talking about the solenoid being well lubricated you can tell he didn't cut the clip correctly.

[@Sweetmawmaw]

I’m going to perish before this done and tuned thanks Rob

[@coltonhulett3671]

I'm weak off this

[@jszy9951]

So satisfying seeing all the systems come together and start working properly

[@IcECreAm-sv2qv]

Rob thanks for the daily videos again!!!

[@jameskirkpatrick36]

Theres alot for all the viewers and rob to learn from this project. How cool, cheers from new zealand

[@MrBumski]

Who seriously down votes this channel? This is one of the best video series I've ever seen.

[@paullmight42]

love watching you diddle stuff rob

[@TheNolannn]

So hyped for this channel and to see this build get finished. Love the content

[@HolyFuzzyM.G]

That awesome AWD is alive!! 2020 is going to be fantastic can't wait.🇨🇦

[@richardbrowne1217]

Hard/easy/hard/easy/hard. I see wires. I go crazy😜🤪😜🤪😜. Glad to see your work is paying off. Happy New Year Rob!

[@melwillseptember752]

Well done man, looks impressive, nothing like when you work on something and get it working for the first time.

[@mikeb.7533]

Rob has mastered the art of giving us blue balls

[@joshuaeckert3093]

I’ve subscribed 3 times and every tine I click on your channel it says I’m not subscribed kinda mad but I will always keep re subscribing. Rotary is the best love you Rob

[@cgcanada88]

Been travelling since yesterday, on the redeye flight home this morning (I'm in Europe), and just made a triple espresso to enjoy while watching Rob doing a Saiyan Fusion with the Skyline GTR and the 4 rotor. Merry Christmas to me!

[@michaelpulice6258]

Good work rob, love the raw excitement you show in your videos.

[@sampence1928]

Im SO excited to hear this car sing at 10k rpm doing AWD burnouts. Can we fast forward to that day please? I do appriciate all of the unique stuff going into this monster, I just want to see the final piece.

[@1jzfc999]

Sick man. Everythings so well thought out and executed.

[@danielpeck6269]

Absolutely sick! I'm so stoked for you

[@mikemorozo]

can we get some appreciation on how clean Rob's welds are on the pump fitting?

[@t1mmy13]

From 4 rotors to 2 arms 😂

[@juconkey420]

Looking amazing. Love the cool gadgets you get. Keep up the great work.

[@ChrisTarpleyAsylumOfCerberus]

Awesome job Rob! This rx7 is going to be the Swiss knife of rx7s!

[@david.carreira]

"Watch how hard it gets" oh Rob...

[@adambowers1907]

This awd system is going to be so sick!!!

[@frostycobra5627]

I can’t wait to see this thing rip I watched your video of the half mile and it was screaming and it brought true joy to your face I can’t wait to see this thing scream!

[@zacharywilburn7253]

Rob your getting pretty good at welding. Nice job.

[@KasperPNW]

I want a smoke office too....... Good ol dabbin cabin

[@jimmys_mk8209]

I looked for this. So glad someone else caught that

[@freeze7763]

Same

[@petereinhardt]

Lol how could you miss it

[@skinnynotsoskinny]

2 hours and over 17k views. Channel is putting in work!

[@aaronsowinski1617]

first daily upload in a little while finally. just kidding Rob i know you are a busy man. Although this may sound crazy, you are the most entertaining youtuber i watch. your content is just... it just interests me so much especailly sense i would like to own a three rotor or four rotor.

[@mrskull5098]

When you are explaining stuff, I have no clue what you talking about at all, almost like I'm numb, I feel dumb lol but I love what's happening, been waiting for the AWD RX7 for a long time.

[@trevorgray3681]

I just wanna see the car launch already

[@aijjee1815]

Trevor Gray yea i hope he doesnt start any 6 rotor build in a long long time because at least for me all i wanna see is this car going fast

[@penamuuri6767]

Patience you must have, worth it will be.

[@dalkaklaric7199]

Great job Rob when are you likely to finish the build we are all anxious to see it finally completed!

[@shanestonn]

thats insane rob

[@tylermorgan1470]

i can't wait to see ur new project Rob!

[@bearrett50kal17]

"I'm gonna use this little power steering pump as a reservoir for the sustem... 10 AN at the bottom to feed the pump" hahaha calling this and understatement would be an understatement

[@UFOGEORGE]

Getting complex now Rob ! I wish you the best 😉

[@Pecals_Peter_Severins]

I don't know if someone asked you this before so here I go. Has the front diff the same ratio as the rear one? If not then the front wheels will spin faster or slower then your rear wheels when the 4 wheel drive system is in full lock. Because the front and rear drive shaft spin with the same RPM. In case they the diff's don't have the same ratio it will cost you lots of tyres in the best case scenario. Don't want to think about the worst case. On a personal note. I'm loving these video's you post. You and your friends are doing a great job and I cannot wait till the car is finished

[@louisturner8842]

Of course it’s the same ratio. Lol

[@ueokatsuhiro]

This car is gonna be amazing

[@verdo300]

I think is better to put trans fluid instead of power steering fluid

[@manioso77]

Great progress guys!!!

[@coreycl2864]

That is soooooooo awesome, I'm so happy for you !

[@2jdm_UZZ40]

Good afternoon from the U of the k 🇬🇧

[@gyalking]

*Nissan would like to know your location.*

[@jeffs3126]

This is such a cool system!

[@RealFuzzyPickLE530]

"You can actually diddle that" - Rob 2019

[@drdominodog5168]

Rob Dahm; bombmaker extraordinaire

[@VolV8]

A legitimate Owen Wilson, "Wow!", from me. Bloody impressive.

[@flamingorphans]

Rob you are doing such a great job man! Keep it up!

[@dimwitzgarage4686]

rob dahm is the elon musk of jdm car culture

[@reinokotze]

pwm= pule width modulation and that black canister on the 4wd system is called an accumulator. its purpose is to store pressure (well energy), its like an hydraulic capacitor, provides power for instant demand.

[@Jonathan_Doe_]

A bright light in a heads up location to let you know when it’s in RWD mode might be an idea, just incase the pump fails without you realising and you try to drive it like it’s in AWD mode and end up spinning out.

[@tomstech4390]

Soo 2wd dyno followed by 4wd? See how power you're losing when awd is engaged?

[@cemhoysaloglu1567]

But rob, wheres the fwd

[@RX7Jay]

best outtros in the business haha

[@jamesrezza7854]

Hey Rob, dccdpro.com has pulse width modulated controllers for center diffs. Had one on my Sti swapped wrx. Worked great with a simple knob. 0-100% lock

[@hectormendoza1642]

We all LOOOOVEEE ur voice, Rob. But ffs, show us SEAT TIME!!!

[@garystat]

Are the distances the front and rear tires travel per revolution identical. With tire diameter and gear ratios in the diffs to consider, this is critical.

[@cheddarcheese8945]

Tha man Robby 👍🏼🦾

[@johnalenwork53]

SOOO SICK!!!

[@grantr6317]

10/10 love watching you diddle things :P

[@Tsxtasy1]

Read your Patreon message about this video and came directly over. It’s Verking! 😍

[@GWNMRJN]

Petition for a second clutch😂😂😂

[@GWNMRJN]

@Shin Sho But dude it would be so stupidly cool looking

[@987koolkid]

When are you planning on getting this thing on the dyno so you can drive it?

[@ValentineC137]

Once they get the Electronics sortes they’ll remove the engine and get it dyno’d From what I remember atleast

[@bglenn2222]

This is amazing!

[@TermGeeZe]

finally a video we dont have to wait a week for haha

[@mikeymang101]

Camera magic.... i saw that guy turning the front wheels. Its cool story bro. Hahhahaha love it dude! Gonna be sick roastin all 4.

[@CrustStarGaming]

I WANT A RX7 NOW thanks to you rob lol

[@grahamclarksondrums4119]

I fitted an R33 gtr v spec gearbox to my Ford Sierra xr4x4 twin turbo about 10 years ago, I made a pwm controller to power the proportional valve, I can adjust torque split from 0-50%, 500 psi available in the attesa but only need about 120psi for full 50/50

[@potjnkye86]

Pwm is pulse width modulation. Love the videos though.

[@zacharymacclure9910]

car parts are sometimes like 1 size fits all, such as a nissan system on a mazda.

[@WelcomeToTheMadness]

I’m surprised you have that stock AEM dash color presentation.

[@321-Gone]

fun build

[@dr.fistingstein1566]

I'll be back when this thing is ready to launch.

[@yesseralakkad4770]

Rob Dahm is the definition of never finishing a project car

[@FigureItAudi]

It'd be a mean flex to start a burnout it AWD and flip off the system to peel out for the next...mile.