Building a mental Audi Quattro 5-Cylinder: but why use dimpled ports?

[@RavenElegance]

Three things: 1. Call the bastards out. Nobody should take 8K and walk away with no consequences. It's not for drama, it's accountability. If I did that I'd expect to get called out. 2. I'd love to hear Brett Walker talk on the video, imparting his wisdom, talking about his tools and the process. 3. That head is pure art, look forward to seeing how it performs.

[@MrFreddan79]

Well this video was a fair warning. My guess is he will suddenly have his parts or money before the call out video drops. If not, let them burn.

[@Elmospiece]

I mean I’m pretty sure I know who he’s talking about but never know so I’ll let him call them out. A simple google search and you could probably find out.

[@Juan_More_Mile]

2bennett?

[@willtrautman6243]

@@Juan_More_Mile 2bennett for sure.

[@stanceworks]

I want to be abundantly clear it is NOT 2Bennett. 2Bennett only builds cars in house, and I still have my car (clearly.) If I could afford a 2Bennett conversion, I would. But it was not them.

[@OddBawZ]

This thing is going to be an animal. 16's is the way to go. This era of car really suits the extra tire sidewall. Especially something with a rally pedigree!

[@linuxuser41524]

i just picked up 15x9s for my coupe gt. the smaller wheel is definitely the right way to go

[@getahanddown]

Agree. Both fit / look of properly sized wheels but being able to run that ideal 50-55% sidewall. Got to build your car tyres up :)

[@warren9962]

Never would have expected to see you here, it always feels strange seeing large creators share a common interest with you😂

[@poplaurentiu4148]

I can already hear the brutal roaaarr and turbos wisperings of Group-B in my ears..

[@jochemarends2035]

Wait odd what are you doing here? Just wached your tiger 2 105 video lol

[@TheNeverEndingProject]

Show and tell, show and tell, show and tell! I know you said it's been two years but I do hope this lights a fire under their bums to do something about this in one way or another.

[@kylestesney3252]

Spill.The.Tea.

[@tdeoux1013]

A quick Google search yields only a few results, but now I'm distracted shopping for parts for a car I don't and won't ever own.

[@dailydriven991]

Lol I went straight to Google as well and it looks like there are only 2 outfits making them. I'm sure there are a couple more but can't be many.

[@RogueViirus12]

That machine work on the head is absolutely beautiful. Excited to see this project back in rotation. You know my love of boxy cars.

[@TheMdog8]

Your videos are consistently of the highest quality; all your VO, editing and music are always excellent - well done mate, keep up the good work!

[@stanceworks]

Thanks a ton! I really strive to produce the best content I can.

[@simoo1]

stop sucking up

[@sladeb6036]

@@stanceworks it is first class my dude. Better than any automotive TV show I've ever seen.

[@stevenjohnson4283]

@@stanceworks No the music was awful. I have tinitus and by the middle of the video the music changed with a heavy kickdrum heart beat, that aggravated my tinnitus. I have no choice but to switch off the video, and down vote the whole video. You know a lot of people watch videos on headphones and have tinnitus and get tinnitus from a large number of industries, including the Automotive, and even Emilia Hartford gave herself tinnitus from revving her engines..

[@ignaci2330]

@@stevenjohnson4283 so, you're bringing down the work of other because your condition, that seems fair to you?sorry for that but, if you have ear problems should always take that on consideration too, the music never was loud and even his voice is 3 times stronger than that and didn't say nothing, there's no 1 guy with a jesus picture being thankful of nothing i swear, always complaining and disliking but never giving a chance... the guy works a lot of hours at day, week, month, so you can enjoy 20 minutes and have that attitude, don't get it

[@sirrevalot2543]

Ah yes, finally the UR getting attention 👏. The 1st video of this car is how I found your channel and been hooked since! Thanks for awesome videos with unbelievable cars and workmanship. Throttle down from Chicago ✌️

[@brianb6507]

Your commentary is always on point. I love how you call yourself out then squash it with your explanation. Brilliant sir! Keep the videos coming. 👍🏾

[@NoClassic]

Can we get a shout out to Brett in the comments. Old job/machine shop dudes have so much knowledge and problem solving skills it’s crazy. So valuable and honestly not many of them left.

[@pfannkuchengesicht42]

Just a couple of weeks I go while watching an old Mythbusters episode I was starting to wonder why nobody uses dimples when porting intakes and now I discovered this video! Fantastic coincidence!

[@jimsplinge4215]

Fun fact - having recently had some extensive urology work I can tell you that the inside of your bladder looks like the inside of the dimpled inlet ports! Strangely beautiful 🏥

[@ross2812]

Give recognition to the superb camera work and editing.

[@ramonnunez1066]

BRO HELL YEAH, I've been studying dimpled ports/intake runners for awhile now. love to see this!

[@Scoots1994]

I'm so glad you are going with 16s, so many people get that big wheel sickness and go too big. The 16s are going to mean lower unsprung weight too.

[@douglasburnside]

Hmmm... I wonder. If you are trying to keep the same overall diameter/circumference you will have a taller sidewall, i.e. larger tire, and the tire might add more weight than is saved by the smaller wheel. Or maybe that isn't the plan at all, I don't know. In any case, I am not a fan of disproportionately large wheels so keeping the 16's would be my preference as well.

[@5thearth]

@@douglasburnside Pretty much even the lightest wheels will be heavier than the tires. Truly, for road use, you should pretty much only ever use the smallest wheels that will fit over your brakes.

[@bigmorris100]

Wow. Made it in the first couple minutes. Always a good time for an upload

[@urs6onfuturas975]

Your mindset of "this will be the most reliable 500whp" is exactly how im building my AAN as well. Considering how difficult/expensive it is to find them in the states now theres no other way.

[@benznotmercedes]

Are those my old Futuras in the pic? Lol

[@urs6onfuturas975]

@@benznotmercedes yessir haha thought about making a few videos so went to change the shit to realize I don't take nearly enough pictures of anything lol did you ever get another set?

[@cencio_1976]

This channel is a gem that keeps giving. Thank you.

[@maxironpaw]

Happy to have stumbled on your channel. I bought an '82 Coupe new. First thing I did was to go to Montreal to purchase the one-piece Euro headlights. They made a terrific improvement to the front end appearance and night driving. Glad to see you are going to keep the sidewall!

[@xagvsx1521]

Glad to see you followed Matt's suggestion on the scanner. Def a game changer.

[@echassin]

I won't repeat anything others have said about how awesome the car is going to be, but I will say in regards to the end of the video (and I'm a lot older than you) that I still struggle to attain a philosophy as mature as yours. We're all going to leave money on the table over the course of our lives in any number of ways, but simply acknowledging that fact and moving on is in my opinion the best way to handle it. You've figured that out at a young age (at least on screen, lol). I really like your line "I just want to build my car"; that says it all. As far as others who might deal with whichever company it is, you put the bug in everyone's ear and anyone who needs to know more before they commit shouldn't have too much trouble by doing their due diligence.

[@stanceworks]

I appreciate the vote of confidence and kind words! Ultimately, I'm just trying to enjoy my hobby.

[@Shopsmith10er]

Had the identical car and color. For the quad headlamp grill, I removed the inner pair, retained the trim bezel. From a 4000 junker grill, I sectioned a left and right side horizontal and placed them where the two inner headlights were. Use your imagination and options for the replacement remaining two headlamps~~ cheers

[@marcosburgo2657]

I am going to try to put some light to the "dimpled effect" on the intake pipe walls. Whenever there is a fluid with certain velocity around a wall, near the wall it is created a zone called "boundary layer". This zone can be either laminar or turbulent depending on the local Reynolds number of the flow. When there is a fast or sharp change in that wall, a deattachnent of the flow happens, this means that the flow does not travel the direction it is supposed to and recirculation zones can be created. Since turbulent bounday layers deattach from a wall later than laminar ones, golf balls or tennis balls have these not perfectly plain surfaces allowing the ball to reach a higher speed and hence reducing drag. Hope this helps, love your videos

[@V8Lenny]

At even higher speeds dimples dont work. And cylinder heads are not flying through the air.

[@topgunm]

Wow, awesome content. Looking forward to seeing how this turns out. I own a 91 urquattro with rs2 engine, bilstein suspension, sport quattro front and fender, rs2 big red brakes and a roll cage. Love that car. Had it for years. Very reliable.

[@gerekappo]

Thank you Mike, always a good day when you post, had a great lunch watching. It really does suck when companies do that.

[@BarukYahuah]

Im fairly new to this channel. Id have to say, your presentation and overall quality of your videos are top tier. I also love the fact you dont copy and paste the vlog formula of Haggarty like a lot of other channels do.

[@benznotmercedes]

Awesome seeing another urQ video and to see old Audis getting some love. Makes me want to build the ABY in my S2 Avant.

[@JoshPinkert]

Awesome work - I love watching your ideas play out and comparing to what I've done and plan to do with my '84. I know you will nail the wheels! I went with 16x8 replicas by 3SDM and run 225s. For brakes, I did a vacuum conversion and plan to install Boxster S calipers with A8 rotors up front. My understanding is with the apikol adapters, these are a direct fit and work with 16's. The rears will be converted to URS4 stock rears. I went through the suspension, subframes, etc already just as you did (mine had 2 bennet coil overs already), although my powder coat shop mistakenly used gloss black. My motor is a mostly stock 10v - I'm excited to see how your AAN comes together and gets installed. Fewer and fewer people are around that know how to do this right so documenting here is super helpful. This car will be a hoot!

[@XBredrenX]

Very impressive work on the cylinder head. If it's within the budget, the dimpled intake on a port injected head seems like a worthwhile addition. Plus, it's so very pretty. I'm considering having Viecomer do the same for my 5-cylinder (B5254T4) head if I can work it into the budget. I live less than a mile from your shop and have also gone to Nimmo for machine work. They are solid.

[@jonathancohen2506]

Really excited! My dad had one in the 80s and he loved upgrading it back then.

[@GM-fh5jp]

Good episode, Mike. It's important to name names at the very least as a warning to other customers and (possibly) to shady businesses that they WILL be called out. ps. An Audi Quattro doesn't *need* 500HP to be a fast and fun car...

[@jamest5149]

The choice for 17” is for brakes, the standard 15” and even 16” limits disc size and calliper choice. I will note oem 15” ur wheels are unbeatable. This is going to be a great series and build. 👍

[@dancornell4062]

Mike, just when I thought I'd never think you would be able to make a car as cool as the Ferrari, you're doing it again! Absolutely love your taste in cars and what you do with them! Thank you so much for keeping us so excited to watch how these all come together!!

[@WexWerxScott]

Stoked to see the audi back on the channel! That car is gonna be a monster! I wanna go for a rip!

[@mariosnikolaou5212]

O couldn't be more excited about a build of yours, i love the European builds. Greetings from Greece.

[@martindworak]

Anything worth doing, is worth overdoing! Glad to see you do it the right way, the first time. Good luck!👍

[@oneforallmankind2713]

The narration is impeccable. I'm hooked

[@eriktorp-olsen1706]

I used to own a 1989 Audi 90 quattro with a non-turbo 2.3 litre 5 cyl. engine. On start-up it sounded like a million horsepower. Driving sideways through curves was as easy and safe as driving straight ahead.

[@GarageItYourself]

Sometimes just talking can get boring but everything in this episode was interesting. The golf ball head is pure awesomenessand the science behind it is pretty cool!!! The satin black powder coating is the only way to do suspension parts full stop!!! A reliable, high HP vehicle is how you can have your cake and eat it 😊 500WBHP will be more than enough to have some fun with and blow away many other performance vehicles. It's all about torque under the curve and not outright power to make a truly driveable car 👌

[@therudeboy5280]

Outstanding video my friend. Crisp and passionately narrated. I actually learned several things today, which is a plus coupled with the entertainment value. I do hope you get recompense for your loss..very unfortunate.

[@SUPERPOWERPHIL]

as a lifelong fan of Audi, man, you are building my dream car! Keep it up! love it

[@user-rb1yf4he9q]

The car that started the modern Audi craze. Awesome!

[@HomeBuiltByJeff]

Looking forward to seeing this project come together.

[@joshuajohnrocks]

I highly recommend tossing those black ignition coils, those are stock ones starting in 2002 and are super weak, go for the R8 red tops, never had one go out on me in 5 years vs I was chasing misfires till I upgraded

[@moonface978]

Personally I’m glad you’re keeping it relatively stock in appearance, be nice also for you to have more of a street car, as I think you originally had planned for the Ferrari

[@seanstuck572]

I’ve been a subscriber for a good while now and I’m shocked this channel doesn’t have at LEAST 500k. His video quality is amazing and deserves much more. If you’re reading this, would you ever hire helping hands? It might boost your productivity with projects and increase your uploads. But what do I know🤷🏼‍♂️

[@DPS_89]

Great update and solid progress. I was waiting for the process of you pushing out the bushings, and what you were going to use. As I'll to be on the same boat with my C5 build.

[@FUCK_________googIe]

if you can't figure out how to remove bushings you have no business building a car

[@RestorationWatch]

The dimpling of the ports helps prevent wall wetting in the ports by assisting the atomised fuel to remain in suspension on it's way to the cylinder. It's particularly helpful with carb induction, as well as increasing flow, as covered in depth in the video.

[@slickdog78]

I'm not a huge Euro car guy. But I do have select favorites like the Quattro's and the late 60's early 70's 2002 tii BMW's. Excited to see this project progress.

[@richardbrowne3641]

That Audi was my dream car when I was a teenager, but I never could of bought one. Love this build.❤

[@kondor99999]

Thank You for not putting on ridiculous 20" wheels. These 80s cars look so much better with a simple +1 setup. Good taste!

[@winningwithoutracing7811]

And I'm excited to see a Walker Turner bandsaw in the background..... There's a five cylinder single cam turbo engine and trans from this era still in the back of my parents garage.... I guess I had good taste even back then. Reading about Intended Acceleration's turbo Audi builds from the 90s didn't hurt for sure.

[@robertrishel3685]

Just PERFECT! Again! I thought the Ferrari 308 was the ultimate….but these Quattros😍😍😍😍. Bravo for staying with the 16” wheels, thank God! Bravo for every decision thus far, it’s perfection!

[@chiron318]

absolutely love the upgrade from the fours to the sport quattro grill

[@TommyG_0311]

considering i spent around about $2000 on a CNC ported cylinder head from 4Piston racing. i can REALLY appreciate the work that they did.

[@timmmy]

On the rear diff, I am running a B5 Long nose diff with a Wavetrack LSD. Fabricating new mounts is pretty easy. This also allows me to run a single piece prop shaft which is nice too.

[@stanceworks]

I'll have to look into this. I don't understand the first half of it though.

[@htmotorworks799]

@@stanceworks This is my 1984 Audi 4000 race car (The RS4K) kzbin.info/www/bejne/ZnbOcoyOa7ZomZo Also for the transmission, Id recommend what I am running which is a Euro TDI wide 1st gear 01E. Built with an 80/20 center diff mod, Wavetrack front diff and these transmission have a differential oil pump that can have a cooler as well.

[@htmotorworks799]

Another video kzbin.info/www/bejne/hYacXnhoqp2tas0

[@chuckcribbs3398]

I love ‘80s builds. This will be epic!

[@dennisdrenthe1058]

On Bringatrailer is a BMW 2002 2.3L with dimpled ports for auction, at no reserve. Really cool to see this level of machining.

[@agent_soshi]

I don’t watch unboxings anymore, but this can be the exception. Excited to see everything on the car

[@Bruce86525]

I have been paitently waiting on this video series to start back up. Can't wait for the engine build. These engines amaze me.

[@mediocreman2]

Glad you're taking a dive into this again! Avoid using those 034 engine mounts. They'll basically fail immediately with that much power. They fail with stock power. 😂 I've heard Verkline is better.

[@MegaDirtyberty]

Interesting, I was looking at using the 034 engine mounts.

[@JoaoGabriel-ey3um]

It's nice to see that, the bench of cylinder head flow it's actually made by a Brazilian shop.

[@Mr.Bearded.Mechanic]

I also like 80's 90's era cars, one of my favorites among others is the famous Quattro S1 5cyl. The iconic sound and form of the car is unbeatable. Glad you didn't go for 17 or 18 inch wheels and a wide body. Your car will be a diamond when finished. Perfect choice of the cyl.head the dimpled intake and polished exhaust runners. Some use dimples on the valve's outer surface (where air hits it). It also makes wonders with carb engines, gasoline atoms will not condense on the runner's walls that easily because of the air cushings/turbulences. Intake velocity will increase because of the turbulence layers at the walls decreasing the diameter (velocity = pressure * surface) but because they ported the runners it should be the same with increased CFM (bigger crosssection area). I also like your thinking about not spreading hate. Keeping the good vibes and mindset up and forward. Looking forward to the upcoming videos!

[@maliiiwa]

Yes! Excited to see the front end build.

[@lordraiden5398]

I understand what you mean on the wheel size. I had a 94' Civic back in the day. It came with 14 inch wheels. I put 16x7s on and lowered the car 2-3/4 with Neuspeed yellow springs. It looked perfect. I had seen other people with 17 and 18s and they looked to big. Now I drive a 09' Forester lowered 3 inches on coilovers with 18x9-1/2 wheels. They actually look to small.

[@docteroperation]

So glad we are back to the Audi.

[@ducbox572]

Glad you're not cutting up an Ur-Quattro. Besides, the SportQ was actually an 80/4000 front end mated to a UQ/coupe rear. This monster is going to be totally unique

[@adamt3332]

What he said... and sport quattro was short wheel base so the rear side window is smaller.

[@sladeb6036]

I'm loving where this is heading.

[@minerworld3578]

Just here to say hi all the way from germany! I love to watch your Videos and to see the Audi.

[@Scoots1994]

The turbulence supposedly helps fuel atomization/tumble too, but if it does I would guess it's more about the speed of the flow more than any boundary layer turbulence.

[@russiancommy]

use the bernoulli's principle to increase the flow, the dimples don't increase flow at all but just smoothen it out, I absolutely believe there is benefit but very miniscule and a can be only seen as a benefit to NA applications. this is a boosted application. you're RAMMING air in not sucking it in, which sucking has resistance to fight against sure. in this application you are pushing air through an object. while a golf ball in the object being moved through air. why scavenging exhaust "bernoulli's principle" would actually be more beneficial because an engine is just an air compressor, if you can't get air out you can't get air in to make anymore power.

[@Scoots1994]

@@russiancommy the point is reducing the size of the boundary layer and thus improving the effective size of the port. Also boosted or not the flow will have a boundary layer. I believe the gain is small, but at some point small gains that can be implemented by a robot are worth it.

[@russiancommy]

@@Scoots1994 at the cost its not worth it at all, and yes you're correct the turbulence creates a boundary level for it to smoothen the flow of air. which again DOES matter if it's a boosted application or not. because the difference is at 10psi he can make 500hp on this head while I for example need to use 15psi to make the same on a stock head. while in a NA application you can't just increase boost, so yes application matters a metric shitttt ton and back to the point of it does not increase flow rate because the flow rate is increased by using the bernoulli's principle which is exactly why ports get narrow then big again to increase velocity, the dimples just make the air flow SMOOTH. not faster the dimples make the effect more efficient but is not the cause of velocity increase inside the chamber.

[@Scoots1994]

@@russiancommy I didn't say boost doesn't matter, just that boosted or not it helps. And if the volume over time is higher normal people are okay saying that is faster even if the m/s rate of a single molecule is not much different. As far as the cost goes ... Do you think Mike paid for the dimpling procedure?

[@russiancommy]

@@Scoots1994 i like to look at it from a general consumers perspective, considering Mike is the individual in place to sell you on the product.

[@danielhussey3631]

I respect anyones builds and particularly yours, but so glad you didn’t cut up the car. And, FWIW, I think the quad headlights with the euro bumpers you have is the best look. Some people really love them. I’d like to try a shot at convincing you to keep the!! .. but ultimately to each their own. I’m potentially interested in buying those headlights if you decide to go that route.

[@stevewilkinson6974]

Keep those QUADS!!! What a great project!

[@divingboardlord]

The wheel setup on the black 308 is gorgeous

[@amdisthebest]

Very cool car. Excited to see where its going! A word of wisdom, don't use those ARP washer included with the head stud kit. ARP undersized the washers and the end up squashing the cylinder head. Larger ones will spread the clamp over a larger surface.

[@simonchristyjohnston4365]

Yuss! Back on the quattro

[@aronbennett4760]

That head work looks beautiful. 034 makes a nice intake manifold

[@benmadderom2281]

The dimpling on the inside of the port also has the effect of further atomizing and mixing a fuel/air mixture, and also "straightening" the overall airflow through the port. It does this by making the airflow within a certain distance from the wall more turbulent. The air/fuel mixture in the center will act less upon the walls of the port, and more upon the turbulence near the surface of the wall, itself. It seems anti-intuitive, but it does create a more uniform, and better-mixed fuel-air charge, and also increases overall port volume. Logic says removing material from the inside leaves room for airflow.

[@Davido2369]

mmm this is the best part of the build, engin planning and sourcing, its like christmas

[@devil2jz500]

I’m getting a Sportquattro partial bodykit in 2 weeks. But no front grille 😢. I will do the exact same thing, 3D scan (I already have the files) and 3D print a bunch of stuff.

[@functionSam]

I can't wait for this car to start for the first time!

[@RobClubley]

The quattro is back! Looking forward to seeing it built. I put 18s on mine and eventually had to admit my mistake. The stock 15s ride and handle way better. I’d like 16s but don’t have the budget right now to get the custom setup I’d need for correct fitment. Also you’re not alone with being ripped off, I spent a couple of grand on an efi conversion kit that never arrived.

[@Kulric]

Yeah, I ran some inexpensive 17's for a while on my 1983, but they felt too heavy. I ended up going back to Fuchs 15". Who can argue with 13 lbs.

[@mediocreman2]

Get your credit card company involved

[@RobClubley]

@@mediocreman2 Unfortunately I paid via Paypal and it was over their 180 day claims time limit when I finally admitted it was;t going to happen.

[@wrbrower]

You content is always amazing. Your taste in cars is excellent. And your videos are always ‘pleasant’.

[@rokuplayz464]

when talking about dimples in a sense of a cylinder head i find it better to describe it as the runners are more efficient. the dimples create turbulence so that the air has reduced friction against the surface in the port, this allows air closer to the metal surface to move faster in relevance to the air in the center, its the same concept as drag coefficient when it comes the vehicles. In its most basic principle the dimples make the air think its going through something with a larger diameter without physically increasing the diameter/size of the ports

[@CDeuce152]

They are not machinists. They are artisans. This will be a killer build.

[@truantray]

More like bullshit artists.

[@virtualizeeverything]

I opened up a 2.5 5 for some work some time ago and i was very inpresed with what I found

[@frenchben1041]

Thank you for keeping your cars clean when you resume working on it. 👌

[@JordanPayneLV]

I love this Audi project, and of course you’re taking things up to 11. Love it!

[@baggedr32mk5]

Buzzing for this build

[@timmason5230]

Thanks Mike!

[@epiccheatmealday1180]

Love 16” rims on a rally bred car. Moar sidewall baby! Love this project.

[@rickh6963]

Mike, I'm excited about the grill build! Keep up the great content.

[@philadams8659]

I’m so excited!

[@holzwurm_hd7029]

Arent these small dimples (like on a golf ball) for creating tiny turbulences on the surface so bigger ones can't form, resulting in better air flow?

[@holzwurm_hd7029]

He just said it, nvm.

[@2002LJH]

On my '84 (Rolled fenders) Ur-Q I ran 16X8 with 245/40/16. I do not recall the offset but it was -3mm from the 15X6 Ronal R8s IIRC.

[@ziwitsch3224]

love that project, greetings from germany- NG's heads are crazy good, they got some awesome videos themself

[@tim205Mi]

Great vid as usual, superb production. Totally agree with the 16’s….. the right decision ….. keep great vids coming… I know how much work and pain it takes 👍👍

[@oetic5016]

Id say you're at a point where it would be fruitious and meticulous about everything. Wouldn't skimp on anything like oiling, fueling, cooling and braking. The 16s and the thread width are my only convern however tasteful it is! Looking forward to seeing this develop into the magical monster its going to inevitably be! 💪🥶

[@rebeccajenson2164]

Always look forward to seeing you work on cool old cars. Keep it up

[@phshift]

was waiting for this to return

[@carvilleweb]

Now I'm excited about this project!

[@benzina5917]

Really looking forward to seeing the front end come together. I think you can take inspiration from a 1989 or newer VW Jetta or Golf where the went to a more aggressive grille and sealed beam headlights. The sport Quattro was still using ugly DOT headlights and some re-purposed OEM headlights from another car may suit the car well.

[@crooke80]

Epic build and video 👌🌡️