Build Your Own Intake. Or Just Watch Me Do It. Whatever.

[@r3dn3k97]

Accurate engineering, better planning than the company I work for.

[@grimreaperdw]

RIGHT?!?! That's engineering where I'm from. In fact it's better because you at least know where to look if it doesn't work right.

[@HomebrewHorsepower]

The best engineering is someone else's.

[@WarriorOfEden3033]

Cost

[@dontimberman5493]

Right at least he ran the numbers before he ignored them.

[@king_james_official]

⁠@@dontimberman5493at this point i just look at the formulas before ignoring them completely

[@gsmdo8836]

As usual Matt, you have the knack of explaining complex subjects in a way that even I can understand. As well as making me laugh regularly during your clip. I don't think I will use this information, but I'm certain my life is richer from having it explained to me. In order to make your life richer, I have sacrificed at the altar of the algorithm...

[@mancaveproductions00]

Talent on many levels..

[@Javierm0n0]

All hail the algorithm.

[@Dan-yu6of]

Im new to this channel as im doing research on how to do a project like this of my own, and i can say that is almost exactly what i was thinking when i started watching his videos. 10/10 Matt, easy to understand and funny too :D

[@tylertravels5021]

“It’s not the length of your intake runners that matters, it’s the length of your di” Had me rolling because I didn’t see it coming.

[@roygevers]

Dipstick?

[@scottcarr3264]

Me too!

[@FoxtrotYouniform]

the weakly deadpan "I'm a lather" also got me

[@davidbutcher1105]

"... ignore the math and wing it." LOL We built a PVC intake for my Honda engine to get the runner length we were looking for. $40 in toilet parts and glue. It works and we got 110 HP at the wheels on a dyno from an engine that's supposed to only make 115 at the crank.

[@802Garage]

I really love the lathey nature of those lathen runners you lathed.

[@carlnelson3893]

You both are such lathest!

[@petergamache5368]

They're magically lathe-licious.

[@nomimalone7520]

Damn fine lathing

[@johnfar5910]

Had me in a lather just watching it....

[@fredfarnackle5455]

I was just lathed back watching it...

[@Papa-Bogey]

The art of half-assing it, SFM-style ... salvete omnes algorithmus.

[@tissuepaper9962]

Salve amicus. Ave Algorithmī!

[@Karlan_]

Bodge

[@user-cu4mo8hv1f]

Source film maker?

[@tissuepaper9962]

@@user-cu4mo8hv1f that's a very different kind of video lol.

[@lyrebirdcyclesmarkkelly9874]

@@tissuepaper9962 Thank you for saving me the time, though I don't think Sofaking got the poin.

[@macestillmace2514]

I love when you lathe things, I really hope to see you lathing more parts on your lathe, with which you use to lathe things.

[@StanleyKubick1]

I read 'hate things'

[@RustOnWheels]

He who lathered lathes laughs last.

[@rider573]

I also enjoy him spinning parts on his lathe.

[@Lucidbkeo]

bro I love following your builds, you don't just do a build montage, you don't just explain what you're doing as you build it, you explain it in a funny way that tricks my stupid brain into actually learning stuff! I've learned soooo much from you and I'm more than thankful for it. I'm sure I can handle a longer format video but at the same time I'm happy that you don't do that. these bite sized chunks are so much easier.

[@ChadOHara98]

Dude, thank your for the epic distractions from my real life. Your channel is pretty much my favorite right now.

[@juanmoorethyme3119]

Giga Chad

[@ChadOHara98]

@@juanmoorethyme3119 watch out!

[@cheese302]

I am not sure Matt, that engineering is kind of the engineering i see often on some pretty important stuff.

[@bigiron4018]

I’m glad to know we both went through the exact same process of determining runner length.

[@TassieLorenzo]

I guess race car engine builders have the luxury of weeks on the dynos and an array of different length runners to be able to figure out the real answers for certain. I'm guessing the math gives more definitive quick answers for the exhaust runner side of things?

[@nanoadrian1]

Matt is better at comedy than welding

[@brycetwyning4436]

"Its not the worst weld ive ever done, but its close"

[@turbo32coupe]

I built ITBs for my 452 cu. in FE Ford. Peak torque was up 10%, but peak power, when compared to a single plane manifold, was unchanged. David Vizard has a book on intake manifold fabrication. The formulas are wrong because the assume a closed end, like an organ. Looking at your design, I think you're spot on. The intake runner inlets are as good or better than trumpets. If you need more plenum volume, you can add a spacer to the throttle body. Sequential injection will smooth out your idle. At higher rpm it turns out that the injectors are 'on' longer than the intake valve is open so injector placement and injector timing have almost no effect on horsepower. I am an engineer also, and have researched this topic a considerable amount. I think you hit the nail on the head. I also run my engine on a megasquirt. I found no difference between sequential injection and batch fire. The engine make 552 hp and 600 ft, lbs. of torque. That's lb. ft. for you younger engineers. The ITBs allow a smooth idle and smooth operation at cruise rpm when using a cam with a race profile, Try to keep the air laminar from the air intake to the manifold, and above 100 mph there is a ramming air effect equivalent to about 1# of boost. Good Luck

[@JimBrodie]

Vizard is pure genius. Dude gets overlooked more often than not. The guy is a huge font of knowledge, that everyone tinkering with motors should pay attention to.

[@recoilrob324]

Personally I'd have chosen the longer manifold lengths that showed the highest torque ( 11 or 12") and carried it out well to the next harmonic. It's better to have run just over a peak than to almost get to one...more area under the curve. As long as the manifold runners are of adequate diameter...the slightly longer runners will still flow well...if you can fit them it's worth it IMHO. To keep the hoodline low you'd need to curve them...but for someone with the building prowess on display here that's not really much of an issue.

[@turbo32coupe]

@@recoilrob324 He's running on the second wave reflection and then the 3rd wave reflection. Longer runners would kill the high end. A 7000 rpm racing chevy uses a 7" manifold runner, 12" total. A 13,000 rpm motor needs half that and he has 4" already in the head.

[@Redhillmotorsport]

Rub the edge of your alloy with some fine sand paper & clean everything with acetone (including filler rod) before welding. Also, put some tacks along the length of your part before you do a long weld, it will help with you edges burning away.

[@honthirty_]

& a gas refill will make a huge difference!

[@MrSkeltal268]

I remember we hired out to a professional for most of our aluminum welding needs (esp 6061) because even the best prep can still produce nasty welds. I remember the guy saying there were all sorts of weird things he did to prepare (solvents, sanding, etc) and even still, if it was a bad batch you got nasty welds.

[@brianb-p6586]

Decades ago I helped a friend build a custom intake for a MG Midget using a Datsun A-series engine, based on a dual Weber DCOE manifold and an aluminum airbox with Bosch K-Jetronic injectors firing at the runners from the other side of the airbox. While using no math at all and based on very little experience, the end result was pretty similar. As should be expected it was poorly suited to low speed... but it ran, and arguably better than the carbs used previously.

[@theprojectproject01]

And, keep in mind, K-jet was actual overpriced hot German garbage

[@brianb-p6586]

@@theprojectproject01 I don't know about overpriced, but was indeed German, and it worked. At least we didn't have to worry about injection timing... since it's a continuous-flow system. 😁

[@theprojectproject01]

@@brianb-p6586 Hey, it's your life, spend it how you like. I myself could never get a K-Jet system to work. Part of the Why is because I was driving old shitboxes with it, and part is that I didn't know what the hell I was doing.

[@xcofcd]

I was working in a shop that mostly did nissan and bmw racing engines. We designed a carbon fiber airbox for a bmw S50 hill-climbing engine and we would build an variable aluminum airbox to test different configuations on a engine teststand to make it perfect...tuning on na engines can get really crazy compared to turbo engines where you just add 100hp with a laptop and a cable...

[@iownyounoobs]

I would recommend trying out pre heating the aluminum, especially considering the size difference in the pieces being welded together. It also helps prevent cracking in the future since aluminum cools fast and it can cause the weld to shrink too fast.

[@watlina]

The engineering genius that is Allen Millyard kzbin.info always sticks everything in the barbeque to pre-heat before welding :-)

[@Nomad5d]

I do preliminary design for things that, if they see the light of day, will get serious engineering analysis done later. Your work here pretty much sums up my job most days.

[@Reman1975]

Oh bloody hell Matt. Your super dry sense of humour never fails to crack me up. Therapist's should proscribe your channel as a treatment for melancholy. :D I may have said this before, but huge thanks for putting in all this extra work to film, narrate, edit and upload these projects, mate. And just be aware that a lot of your loyal viewers know that if you DIDN'T do all the extra messing about needed to create your great content, you'd probably have had time to finish all your current projects ages ago. A while back I decided to try filming myself doing a small lathe project (A simple tailstock die holder), but quickly realised that just making sure everything was in frame and lit to an acceptable level meant EVERYTHING took 3 times as long to do (it didn't help that I ended up starting one part again from scratch. Not because I screwed it up, but because the camera had spent the whole 45 minute of machining trying to decide if it should be focused on the work, the tool post, or the damn lathe bed !!!). I quickly gave up and finished the project without recording anything else. My attempt to join the (already crowded) ranks of engineering youtubers didn't even get to a point where I needed to think about annotating or editing that aborted mess of video clips. It was all just too much work and aggravation for (in my case) zero psychological or financial reward......... So once again, thanks for putting in all this extra work for us mate. Your efforts are not unrecognised.

[@SuperfastMatt]

Thanks for the kind words! I love reading comments like this.

[@slfrules1]

Those top injectors remind me of the few race car intakes i've seen. One that really sticks with me had these floating carbon trumpets that rose and fell with RPM. The injectors were suspended above the trumpets but first sprayed into something like carb jets. The injectors moved in sync with the trumpets but didn't look like they were mounted to the same mechanism. It looked like it was using slide throttles mounted at the cylinder heads but somehow the trumpets looked like they were vacuum controlled.... beyond being completely confounded by controls those carb jets jumped out because of the air patterns after the jets. The fuel spread normally from the nozzles and hit the jets maybe an inch out. Then fuel/air collapsed and concentrated a bit past the jet and faned out as a super fine mist to hit the trumpet just as the diameter of the cone reached the runner diameter. I thought at the time it was for atomization but the way you explained the potential of 3 injectors feeding one cylinder i wonder now if it wasn't done to keep from crossing streams... Thanks for the knowledge!

[@TheFabricatorSeries]

If you decide to take a trip to Vegas, stop by for a TIG class. I'll hook you up 👍

[@David-qs5ii]

This project so deserves to succeed. I can’t wait to see it run.

[@idiotsavant7276]

This video is full of exact amount machinist trigger words, pop culture references, and sarcasm. 10/10 would watch again.

[@XStuntManiac]

Ngl, after, like, 4 years in school learning about mechanics and aerodynamics and such, and a few more years of self studying, nobody has ever in my life been able to explain the air wave pulses so clear. I always knew "the theory" and such, that it does work, and that there are waves in the intake but this. This video is just a PERFECT explanation of how it really works. I love it.

[@turbotoshy]

the rh/lh thread for the fuel rail has blown my mind, thank you.

[@rollerdragon]

engagement!! commentary!! suggestions!! [that should do it... seriously, i love what you do here... that jag is killing me.. ]

[@davesmith9325]

The algorithms requires I note you are definitely going to need more brackets.

[@R4C3R]

I find your comments hilarious! Gives me lots of joy.

[@airmotivewelding8012]

Great job! Fun to watch, very good explanation on some complex stuff as well. Welding, your machined parts are causing contamination (in my experience). Bead blast parts (clean cabinet), Acetone parts, and a good clean filler rod works for me for 25 years. Looking forward to this project, Very best to you!!

[@bgee461]

Outstanding. What would be the cherry on top, is if you shatter world records with your wild guesses

[@mfl950]

I have to admit you are one of the very rew engineers I've heard that actually have a sense of humour and are always so dour ..

[@aaronbuildsa]

@4:32 .. I can assure you that 18.4mm is not 7.2 inches, or so my wife says. Uh. Wait. (It is, however, 182.8mm)

[@Liperium]

Love these. It's like my engineering/math fix, but you throw it out halfway threw the project and eyeball it. Love it!

[@kingofl337]

The humor and frankness in these videos and disregard for making things 100% is excellent. The reality of shade tree engineering vs mass production is spot on. Plus bunghole. Huh! Yeah!

[@WileHeCoyote]

Math just gets you to the right building, engineering is deciding whether to pay the fee at the door or just finding a rock to thrown through a window 🪟 . It's just a question of scrappyness and or necessity

[@helplmchoking]

Yeah it's like playing darts but you can't see the board or anything so you're playing blind. Math shows you the board and let's you see the bullseye, but it's on you to figure out where to aim, how hard to throw and how to arc it. Then it's experience that let's you actually make your arm do the thing

[@easyBob100]

Your welding makes me feel better about myself. Thank you. :)

[@Cur8or88]

4:13 You can open a link in a new tab using the middle mouse button, if you have one.

[@names_dave]

Or hold control key

[@Ratkill]

I appreciate the audibility. Blows my mind how many vids post with whisper quiet dialog.

[@claudiuavram4673]

I simply adore the amount of things done here that might need to be redone, "better".

[@danosburn80]

This has become my new favorite channel! you just described the S.W.A.G method! works at least 25 percent of the time!!

[@hoaarts6700]

Intake pulsewave modification is something I didn't know I needed in my life

[@wilsonseymour993]

I appreciate your "eh give it a shot" approach. Really helps guys like me who overthink it just go get started.

[@narendrabagusadiyaksa1880]

If the fuel line crossing the body line, then make another reason for it! You can make a ram air intake/ air scoop infront of that crossing (aerodynamically speaking) so there's another reason for extra body while adding pressure for your intake system. You should run aerodynamic analysis anyway though, ansys workbench makes an easy tool for it

[@MacroAggressor]

Never heard an explanation of intake lengths that made sense, thanks for that!

[@AdamNZ]

Ohhh I’m about to make a video similar to this for my sr20ve build in my 180SX. Love the CFD work.

[@MrMightyytau]

Matt, forget the algorithm I watch for the fun engineering and great commentary, "I'm made of lazy" cracked me up.

[@JamesYoung61]

I love the bellmouths that you CNCd onto the runners, they are amazingly critical on any suction element, I suspect that this intake will be revisited at some point before you go forced induction.

[@relaxationispossible1593]

Just bought an HFT welder and started welding for the very first time yesterday, I am excited to use Send Cut Send to not only practice welding but to build neat 3D metal structures that would otherwise be costly and require machines / brakes that I don't have, thanks Matt!

[@WASTED__POTENTIAL]

Best use of the Fast and Furious scene I've seen yet.

[@shaunbrennan5281]

You lathed it! That really hurts my feelings. Mission success.

[@JayHaell]

"Since I AM made of lazy"... I... you... you have never been more relatable ❤️

[@riossioseternal4837]

Woah, your explanation on how variable intake runners actually made sense when explaining rebounding pressure waves. Thank you for that.

[@yeetskeetledeet8184]

Just some friendly advice from a motorsport fabricator: I think one thing that could help your aluminum welding would be to keep your filler wire in the argon shielding area after dabbing. Also clean, clean, and clean again beforehand. That black soot around the weld area tells me there was some shmoo left on there. Great work on the designing. My background is in engineering and I can confirm this is exactly what happens 😂.

[@thexpression27]

I am new to this channel and this is pure gold. Never seen such a knowledgeable and cool dude on tech related car-content yt before. Best greetings from germany🇩🇪👍🏼

[@MrHandyDad]

Another good one, keep at it.

[@pokeypaul78]

One little suggestion I have often seen used on formula student cars that sometimes backfire: put in a plug that can blow out kind of like a cork. Or you can also just plan on it to backfire to "dynamically" increase the volume of the airbox.

[@chrisdody5867]

You brought out my 63 year old dork. Born to racing and appreciated every second of your video. Had me laughing along like a thirteen year old. If ever in Denver stop by for a beer. We can tap a bung hole on a new keg.

[@Dynoids]

Can't imagine you wouldn't be aware of how many FSAE viewers there would be, but this is really helping me get started on the intake manifold of my engineering team participating in FSAE.

[@gimpsunlimited2505]

I built a intake manifold for my TR6. There was some test data from Jaguar about intake runner length. And all those on line calculators, but they were about V8’s primarily. So, I winged it. 16.5” from bell inside common plenum to head, another 3” to backside of valve. Currently running MS3X. The goal was torque, preferably around 3200 RPM. Not much space in a TR6 engine compartment. Based on Mat Cramer’s advice at DIY Autotune, I linearly corrected the VE map to a set 14.7 AFR and the plotted the MAP isobars. My cam is allegedly a flat torque curve…..the isobars plotted to a peak around 3300-3400 rpm.

[@MachoMostacho]

As someone trying to design his own ITB setup, the fact that you looked at the data and then proceeded to "wing it" makes me all warm and fuzzy inside. I have no idea what I'm doing anymore.

[@SeanPurdy-f5u]

After seeing your welds, you’re getting a grinder for Christmas.

[@Gixie-R]

Splendid job. Things dont need to be pretty to give you smiles.

[@tali1998w]

I was on RIT FSAE way after that senior design project took place but we still had the variable intakes laying around! Very cool to see you refrence something I saw in person in our shop. Our engine dyno was also a senior design project at some point

[@Flamewake]

This is gonna be a huge help on my capstone project. Love it

[@mackenzieclancy959]

I did a school project years ago on exactly this subject. Ended up designing a working infinitely variable intake manifold for a single cylinder engine

[@recrdholdr]

Honestly that was a great way of explaining Intake Wave tuning. You might want to visit Welding tricks and tips or The fabricator series though.

[@tazou19]

I was lucky enough to do my part in skewing the algorithm in your favor today! Google Opinion rewards asked me about your video. Told them how interesting and entertaining your video was. All hail the algorithm!

[@forrestnutter]

I don't need to learn how to do this. But I'm going to. 🍿

[@raptorjesus3396]

Given a turbo charger with one broken turbine (the hot turbine usually works fine), a 10kW RC motor, appropriate pwm driver, an Arduino and a 24V battery, we should be able to manufacture a electric supercharger. Would have to replace the alternator for 24V windings to power the 24V batteries as well as a 24/12 DC converter to charge the 12V batteries, and plug some 24V charge controller a d an Arduino. Safe for mounting and support that should cover all requirements at round about $500. You guys think it would be practicing to juryrig a supercharger in about two months of time?

[@54mgtf22]

Love your work 👍

[@markturner2561]

This man is the most skilled lather I’ve ever seen

[@nickfosterxx]

Holy crap. 183 thousand subscribers?! People noticed!

[@joshuagumm8485]

Very swag work on the plenums. I love it.

[@boltonky]

Great subject matter :) and learnt the hard lesson about intakes on my FZR swaps there was tuning difficulties when not using the OEM intakes (no wonder yamaha used the same intake for multiple generations) Thanks and keep up your hard work and appreciate the knowledge you provide

[@omnipotent87]

You could have gotten shorter injectors. Bosch EV14k injectors have an overall length of 44mm. What you have look like full length.

[@corglass]

Love your self deprecation, despite doing an amazing project with insight from all angles, machinist, fabricator, engineering, designer, race car driver. Go you!

[@VolvoJoris]

Brilliant and entertaining as always! The injector rail seems to poke out quite a bit. You could try using shorter injectors, to get the rail closer to the intake. But that would mean spending more money..

[@StormBurnX]

I love that the closed captions still caught the "length of your" comment :)

[@wordman757]

A "wild guess" (or, more specifically, a "wild ass guess") is an "onageristic determination" (an onager is a wild ass). Now you know.

[@FordZda]

This was fantastic information, im doing itbs on my duratec with an MS3 and the dual injector purposes were so much clearer after.

[@TangoDeltaSafe]

I find it amazing that he used RIT Racing’s data. I am on the team it is very cool to see you using our data. Though this was gathered before I was on the team.

[@heroinfluenzer]

I've never even had remote interest into engines and cars, until I started watching your videos

[@indiebekonn]

Who doesn’t love the smell of non-engineering engineering in the morning.

[@bryanleal9836]

8:10 the taper is actually a sheer effect for the top fuel injection system and helps with re-atomization. fuel doesn't stay still and i learn it doesn't stay in place also helps with velocity

[@mikegoebel8039]

I work for a professional racing engine design, manufacturing and building company and we do some of the same "engineering" as you have done here. hahaha. I love it!!!

[@xander8323]

Thank you for helping me not sleep with your amazing humour and learning stuff

[@groundcontrolgainesville4841]

I fell asleep while watching this and then woke up and rewatched it. I hope that contributes to your channel engagement. Keep making videos. You have me edged ready to see this run.

[@triggatrey42]

“I’m a lather!” I love your content and your lingo!

[@TBrady]

One thing you can do while welding aluminum pieces like your throttle body flange is bolt a piece of steel to it before hand. Then you won't warp it as easily. Still can't get crazy with the heat, but it will help alot.

[@Mrshotshell]

Garage 4age has a ton of ITB intake runner length dyno testing videos. Everything from a soup can to a traffic cone.

[@terryenyart5838]

I like the way you think. I could benefit from some of your thought processes lol! Love anything that makes fantastic HP, Torque & mechanical efficiency. The best teacher is experience, so don't be afraid to try different intake designs. I prefer my injectors as far away from the intake port as possible. Testing has shown some performance increases due to the fuel air mixing more thoroughly, but again, dyno testing & trials are best.

[@mrman1536]

Learnt some time ago .When saying tiging ali and melting in the same sentence, turn up the current . Welds faster and neater. Just like a blog rant build.

[@dwianugrahfebriansyah8617]

"math is dumb" damn.. can't agree more to this

[@jmvjeroen]

I like this approach. Making sure there's room for improvement to ensure this is a long lasting hobby.

[@franklinmaurer8383]

That is the best description of the rain behind variable intake runners that ever heard. Great job kinda-ignoring the math!

[@murdurer333]

That's a nicely turned taper you did using your turning machine!

[@leok888]

Nice result! I went the composite route for my air box when I squirted my CBR. But seeing how it turned out, I might try your method if I ever need to redo my air box.

[@Thomas-yv5yw]

what does it mean to squirt a motorcycle ?

[@leok888]

@@Thomas-yv5yw it means that I converted my motorcycle to EFI using the MegaSquirt DIY EFI solution, which is the same thing Matt is using.

[@Thomas-yv5yw]

@@leok888 oooh thanks for the answer ! what's your review on berfore/after EFI ?

[@riverivy6628]

I got sent this video from my brother. I don't know anything about cars but I like your funny jokes and your filming is very interesting. So 10 out of 10 video in my book.

[@Rostol]

this is such a tempting re purposing of my s1000rr that I haven't ridden in 3 years!

[@R1j0hn]

Most people who have picked up a welder has heard... "A grinder and paint, make me the welder I ain't." But it really is true, grind your welds flat. It looks much cleaner, and should not decrease strength if welded correctly. Ask a destructive tester, or welding instructor... 😉 For those that challenge my statement.