How a Muffler Works

[@speedkar99]

Purchase tools used in this video to dissect your own car parts: Angle Grinder (aka snap ring pliers): amzn.to/3nyCsVp (US) amzn.to/3hyoQFR (Canada) 3/8" Ratchet set: amzn.to/3hA7LLD (US) amzn.to/3zgHE2d (Canada) Screwdriver set: amzn.to/3tGeU1S (US) amzn.to/3hy4Z9G (Canada)

[@74nova36]

Where’s the link for the toothbrush?

[@THEAB10HDTV]

we need india

[@buggs9950]

@@74nova36 Which one, orange or purple? I can't decide. Maybe they come as a multi pack, that would save me having to choose..

[@charlieangkor8649]

Why are you posting this? Do they give you money if someone buys through the link?

[@hxhdfjifzirstc894]

The sound waves are 180 DEGREES out of phase, not 180 'percent'. It's not the same thing.

[@rockerojuan]

I love the way you throughly explained the muffler's function, but that toothbrush pointer just worked like a charm.

[@speedkar99]

+rockerojuan thanks for the kind feedback

[@dbovee4]

love the toothbrush pointer!

[@speedkar99]

Mr. Toothbrush reminds you to brush your teeth three times a day.

[@michaelmace924]

David Bovee Dude, my exact thoughts

[@LoriSmithsspro]

I was thinking the same thing...lol

[@titusfana9210]

pointer of a perfect teacher kkkkkkkkkkk...

[@harambeftw8363]

Toothbrush pointer is the best

[@Tony32]

I understood everything thanks to the toothbrush.

[@speedkar99]

+Tony32 haha toothbrush superhero

[@speedstriker]

That's the toothbrush of clear instruction. No educational video is complete without it.

[@groundzerozone]

Perhaps this video is sponsored by Oral B... Maybe?

[@kentkatchem]

LOL! That's great!

[@mbabcock111]

Much better than 'talking hands'...

[@dil6969]

Surprising amount of engineering in what appears to be a simple component. This channel was a great find. Keep it up.

[@speedkar99]

+Dylan Lewis Agreed, I didn't know myself there was so much to a muffler, especially the reverse flow design.

[@truthaboveagenda]

Very interesting, and informative work, speedkar 99.

[@ryancalhoun4671]

It's a Toyota

[@Allthingstech3108]

I am a school physics teacher I will show this when I teach interference.Great job. Thanks

[@speedkar99]

+Physics_rabbi Thanks I'm glad my video could help your class.

[@udarasamarasinghe8811]

For best results, use a toothbrush to point

[@firearms-explosives]

Firearm suppression is another relevant Application and easier to test variables on.

[@KarlAlfredRoemer]

Please calculate the lowest frequency that can be reflected back and forth between the partitions. And then think about how high (or better how low) the frequencies are that have to be damped away in the rear silencer. Then you will see that the explanation in the video cannot work at all.

[@Pranjal90]

@@udarasamarasinghe8811 😂😂😂

[@sc0rch3d]

Loved the sound of the muffler delete but was sad this video was so short. Love the lay man's explanation in a short video!

[@jojotogo10]

What an informative video! Clear well shot, very well described - and no fluff. Keep them coming boss

[@speedkar99]

Thank you very much, clear and to the point is how it should be!

[@dominicfong6341]

Can't believe such a lowly Corolla muffler has got so much engineering inside of it. Thank you very much sir!

[@speedkar99]

+Dominic Fong I agree! I would have thought it was more simple

[@polymetric2614]

dude i love these videos so much i was just watching engineering explained's video on mufflers and then i was like "i wanna see the actual thing cut open i bet speedkar has done that" and you had and its beautiful

[@jerichoduarte9192]

I am impressed with your physics explanations!

[@speedkar99]

Thanks, glad you found it helpful.

[@VanillaSnake21]

Spend 5 minutes explaining the complexities of sound waves bouncing inside the chamber and how it's important to keep them pressurized, then suggests to drill a few holes to drain the water, lol

[@speedkar99]

+VanillaSnake21 Yep Its one or the other With OEM mufflers though I don't think you need to drill a hole, the material is much better quality than aftermarket

[@VanillaSnake21]

But I don't understand the point of the suggestion, you're saying compromise the muffler and make it less effective in reducing noise as well as create a exhaust leak for what? Just to make sure the muffler doesn't rust? But at that point it's a garbage muffler anyway.

[@speedkar99]

+VanillaSnake21 yea true. Its a trade off.

[@VanillaSnake21]

No you don't understand. A trade off for what? A trade off to keep the muffler longer? But what's the difference between a rust making a hole in the muffler or you? When you make holes in it you might as well throw it out anyways.

[@theravedaddy]

An 1/8 hole in the muffler aint gonna do shit to the noise you bellend but it will drain all the collected condensation out. Many exhausts have them as standard so give up trying to be a smartass.

[@augy183]

I love how you explain the sound wave with that tooth brush

[@speedkar99]

+augy 183 Oh Yea... the toothbrush is the instructor now!

[@souravzzz]

Huh that sounded a lot nicer without the muffler.

[@speedkar99]

I agree. I didn't expect a Corolla to sound this good. You should hear it now that I chopped the catalytic converter off!

[@nirajpatil3061]

speedkar99 According to AP, you will have the whole car into its constituent parts with 10 more videos.

[@oldundead]

Make me wanna cut off my muffler right now.

[@cabbagemaster7196]

Mufflers stop the good sound but I think it’s illegal

[@1171karl]

Yeah, might grate a bit after a while though...

[@rudolphguarnacci197]

It is quite clear to me from this video that if you want a muffler that lasts a long time, use a toothbrush. Once I saw that, I knew this guy was legit. I'm subscribing!

[@speedkar99]

Haha The toothbrush doubles the muffler life.

[@jimjimm370]

It's just baffling !

[@speedkar99]

It is!

[@godfreypoon5148]

+Jim Jimm It doesn't resonate with you?

[@CNCmachiningisfun]

Further replies have been muffled ;) .

[@TIMEtoRIDE900]

You've exhausted all the puns. . . . .

[@CNCmachiningisfun]

Pun-ishment is in order ;) .

[@SimSahlstrom]

Great video. Hats off to the guy who volunteered his toothbrush for the pointer

[@JahanZeb1976]

Excellent video as always from you. Great work uploaded.

[@speedkar99]

+LearningZone thanks!

[@barrybebenek8691]

Did not know there was that much engineering that went into a mufflers’ sound-cancelling calculations. Super cool. 🇨🇦👍🏼

[@hxhdfjifzirstc894]

When they do these kinds of calculations, they're targeting one specific RPM, and probably 2nd order harmonics.

[@Tadders]

"Drill holes in the bottom?" Wouldn't that make it much louder?

[@speedkar99]

It was a joke

[@Tadders]

@@speedkar99 Man, I'm getting old

[@masoudhosseinzade9621]

usually, in this kind of videos I'm not expecting much physics and formulas! excellent job

[@speedkar99]

+Masoud Rad thanks, your right a splash of theory is always good

[@loscarinte8002]

Quick concise and to the point. excellent editing job. thank you for not wasting my time

[@speedkar99]

Glad you appreciate my work

[@aloolly]

Nice explanation , I've heard from my mechanic that if u start a car's engine don't shut it down straight away as the water vapour will condensate in the cold muffler and resonator , let it run for few minutes until the pipes become hot then water won't condensate and this will prevent it from rusting

[@charlieangkor8649]

Rust needs oxygen to form. The point of car engine is to consume the oxygen from air to burn fuel and emit exhaust gases that don't contain oxygen anymore. So how could the rust form when there is no oxygen?

[@OhioBahn440]

@@charlieangkor8649 do you leave your engine running 24 hours a day 365 days a year? if not, there is oxygen and water in your exhaust system

[@hxhdfjifzirstc894]

@@charlieangkor8649 Yeah, how could an exhaust pipe get rust on it? Obviously, exhaust pipes never get rust on them.

[@harryshin3209]

If you drill holes in the muffler, you obstruct some of the design pressure for the muffler to work properly. Don't drill holes in mufflers.

[@speedkar99]

Agreed.

[@TheRyadrian]

Drill holes in the muffler and put maybe screws or rivets of some sort if you so dare to..

[@NavinBetamax]

@@TheRyadrian ...Yeah....microwave the ice cream then freeze it !

[@TheRyadrian]

"So how move a tree that is in the perfect spot and growing very luscious, first dig it out, then put in back in"

[@2KCamaroZ28SS]

Toothbrush.

[@tharii314]

Brother's underwear

[@Carguyforlife]

It works as a pointer stick though!

[@deademer8678]

It's 3 am in the morning, and I am watching this. Help me

[@speedkar99]

+A B but why ?

[@jerwinusacdin8954]

Lmaaooo

[@vadditejaswi5460]

That's pretty cool bro...

[@dansuper6103]

No it’s 3 am in the evening

[@robertkanyike7157]

Excellent video, never imagined all those chambers inside a muffler. Thanks.

[@speedkar99]

I was quite intrigued as well

[@roarkshsha]

First rate video. Clearly explained. A lot of information. Camera showed everything that needed to be seen. Thank you.

[@speedkar99]

+Roark Gill glad you enjoyed it. Thanks

[@maull9382]

Very clear, informative and concise....and I like the 'used-toothbrush pointer' too. Where can I get one? I bet it's 'branded'🤣🤣🤣. Indeed a garage classroom! Have since subscribed for the 'classes'. 🫡👍🙌

[@91185mccoy]

Toothbrush made me subscribe

[@speedkar99]

+Alex McCoy Hah another vote for the toothbrush!

[@darrensmith9407]

Toyota are so proud of the equipment they make that they put their name on stuff no one will ever see...Boss move! * good vid 👍

[@speedkar99]

That's because there's competition in the aftermarket so they want to stamp their name on it.

[@Jason-iq1tx]

Good job. Got the ideas across. Not unnecessarily technical. Actually looking at a real muffler was better than a chalkboard diagram. I didn't notice the toothbrush.

[@speedkar99]

Glad you found it helpful

[@EduardoGaitan]

Hey drilling holes as you advice at the end to prevent rust and water accumulation wouldn't that equal to more noise ? as sound will exit through those holes instead of the chambers

[@fadidan84]

Excellent video, this was something I've wondered about for a while, thank you for the efforts you've put into this video!

[@speedkar99]

+Fadi Dan I'm glad you learned something

[@KingTsunamy]

But if you drew holes on the bottom will make the waves also go through them and will make a strange noise with the water.Also the temperature in muffler should be over 100 C degrees so the water will drain only if you stop the engine,am I right ?

[@tteuvky]

was thinking samething

[@speedkar99]

Good point. And yes the idea would be to drain the water at standstill so it doesn't sit inside the muffler overnight.

[@dalphinus]

speedkar99 Once the bottom are drilled with holes, will it cause back pressure drop, noise coming out and other impact? How many holes and how is the size are we talking here? Thanks in advance for the advise.

[@eyellgeteven9928]

+dalphinus I think he's talking about pretty small holes...like 1/16" 0r 3/32" which won't make any difference soundwise. Most factory mufflers have small drain holes in them brand new.

[@danielcliment8251]

The toothbrush is the best part! Thank you!

[@speedkar99]

+Daniel Climent haha why the toothbrush?

[@briankonson6541]

Thank you. Well explained, does it matter if I replace a corolla muffler with another one from a different sedan, say from a nissan sunny?

[@mrflamewars]

Reviewing this video again it would be really cool if you could fit like a Mitsubishi 3000GT muffler that has a little arm sticking out so you can force the little flap open with a Sport Button.

[@speedkar99]

+John that's cool!

[@luisgordillo1695]

nice pointer bro..reminded me to brush my muffler before bed!😂

[@speedkar99]

+Luis Gordillo gotta keep it clean!

[@tigerseye73]

Thats the cleanest Iv'e seen your brothers toothbrush since I began watching your channel.

[@adamj3170]

Excellent clip just like the independent fog lights on the solara.

[@speedkar99]

+Adam J Thanks! Have you tried the independent fog light mod?

[@adamj3170]

speedkar99 yes on the 99 solara I did because of your awesome clip I crashed it miss my white 99 sle

[@TheRouteShow]

Best channel..u r as good as Chris fix channel

[@speedkar99]

+TheRouteShow thanks. Why do you say that about him?

[@SamA-xi8qj]

This was very informative! Thanks for being so thorough!

[@speedkar99]

Awesome thanks

[@ESLinsider]

Cool. Thanks. 3 inch exhaust systems common? I've got a stove I made from scrap metal and was thinking of using old exhaust pipe and maybe even muffler in it if I could find it. i've seen some different stove systems that have a similar concept as the muffler with baffles and such.

[@jamesdean810]

Nice video explaining everything clearly. I have a question for you though. The silencer pipe in my 2005 Camry center exhaust section has something that's broken off which causes a rattling sound when the engine is idling rough or when I shake the end muffler. The affected section is the bulging part in the silencer pipe after the cat converter but before the end muffler. The car drives fine for now and there is no check engine light. Should I 1. replace it or, 2. cut it open and try to weld it back/cut the broken section off or, 3. just ignore it altogether? I'm appreciative of your opinion. Thanks.

[@NCypher]

This was more informative than I thought it’d be

[@speedkar99]

Glad you learned how mufflers work

[@legionofyuri]

I loved how you seemlessly transitioned from using the toothbrush in explaining the body of the muffler to using it to explain the science.

[@speedkar99]

It's my sidekick

[@uLeabric]

Very good video, the creator went through all the trouble to help us explore the inside of a muffler. Thumbs up both here and by clicking!

[@speedkar99]

Thanks

[@_baller]

Is that toothbrush talking?

[@speedkar99]

+tommy d u b b s yes The host of this show

[@grunta3370]

What’s his name ?

[@manuelramirezmagic]

great video !!! do you know if the muffler of a GMC Safari works the same ?

[@speedkar99]

Wow u haven't heard of the Safari in a long time!

[@jeffbeck6501]

Awesome video. I did not like that harsh beep at the end. But other than that, very educational and cool.

[@speedkar99]

Thanks for the feedback

[@jarhdhine9583]

Thanks to Your Toothbrush I clearly Understand everything,, keep it up

[@speedkar99]

I'm glad my brothers contribution was recognized

[@rodhawkins5037]

@@speedkar99 at least you didn't scrub the toilet with it. 🤤

[@123elflow]

What's the best way to modify this original muffler to so it can have a better sound, what's parts needs to be remove? If any picture available please provide.

[@nickmakaia5166]

Watching these videos could make me a qualified mechanic 👍

[@speedkar99]

+Nick Makaia hmm Mechanics don't chop stuff open or know how it works, they know how to diagnose and replace.

[@nickmakaia5166]

speedkar99 in order for a mechanic to diagnose and replace, wouldn't he or she know how it should work first??? Unless you're someone who reads 710 where the oil goes in. Lol

[@NiSE_Rafter]

Loved the video, it was very informative while still being entertaining.

[@speedkar99]

Glad you enjoyed it. I don't know whats so humorous though...

[@LawtonDigital]

That's really cool, thank! Does water inside the muffler help dampen sound, too? And/or does it interfere with a chamber's resonance frequencies?

[@caominh2874]

i love it how he used the toothbrush as a pointer😂

[@michaelyiannett1768]

Subbed cause the dudes pointer was a heavily used toothbrush. And the info was pretty good too ;)

[@speedkar99]

+Michael Yiannett haha thanks

[@juliopenales2724]

Toothbrush pointer makes clear explanation.i learned a lot

[@trippm4036]

Good video. I appreciate that you explain the physics of it. How about explaining a resonator as well?

[@speedkar99]

+Tripp M Thanks. I thought about cutting that but it isn't worth an entire video.

[@hxhdfjifzirstc894]

It's a very similar device. If I remember correctly, it's tuned to cancel 180° out of phase with common cruising RPM.

[@dellgriffith5848]

You can also drill a hole in the fuel tank and it will last longer.

[@speedkar99]

+Dell Griffith but you'll get bad fuel economy

[@udarasamarasinghe8811]

speedkar99 And maybe an explosion some time

[@grunta3370]

speedkar99 just drill a small hole and plug it up when u park it 👍 better Fuell economy 😉

[@brickwal92tt]

Would drilling drain holes into the bottom effect the sound/go against the engineering, and how, or how not?

[@speedkar99]

Yea that's not very productive

[@jonathancolling2284]

Vocally I am reminded of Ross from Friends. When the toothbrush is used to explain the graph I see a muppet. Good video none the less!

[@speedkar99]

Thanks haha

[@antemihaljevic8099]

What do you think about muffler delete? What are the downsides of it?

[@speedkar99]

+Ante Mihaljević it's loud.,..not my thing.

[@antemihaljevic8099]

speedkar99 what about torque and pressure and mpg after muffler delete

[@chachee15]

if you drill holes on the bottom wont hat defeat the purpose of the muffler ? wont it get loud

[@speedkar99]

+chachee15 it sure would.

[@rajeshreddy1659]

@@speedkar99 does it effect engine?

[@johncoruna]

Great explaining!!! Love the brush pointer 🤣

[@speedkar99]

Me too 🤣

[@VaporwaveRick]

4:53 I used your suggestion and drilled holes in the bottom of my muffler now it sounds like my car makes these wheezy fart noises when it's at idle and when I rev the engine it sounds like a kazoo. How many holes was I supposed to drill?

[@vitalisomweri]

four!

[@hybrids0ldier]

i like how u present the components of the video.. also the fact that u do it with a dead tooth brush: D ..kudos brother

[@speedkar99]

+hybrids0ldier thanks and kudos

[@Rodecpt0]

Great video, but I don’t understand why one would drill holes in an exhaust

[@speedkar99]

Lol

[@menukaramanayake6786]

I recently learnt about waves and this video was very helpful

[@speedkar99]

+Menuka Ramanayake That is I'm glad it helped you put the theory into perspective.

[@3xantrik]

so you dont think that drilling a mufler will not cause it last less longer? or making little bit more sound then before?

[@speedkar99]

+3xantrik Getting the water put is important. But yes the trade off is a slightly exhaust leak.

[@antipoti]

180%? I think he meant 180 degrees. (2:55) But still nice video. The sound without the muffles was so cool, I didn't know all i had to do is saw the muffler off. :D

[@speedkar99]

+antipoti thanks for the correction, your right.

[@davidtorres1696]

Oem mufflers are regulated or fixed to work this way very complex all compressed to restrict Flow 🤔🤔🤔

[@speedkar99]

Yes

[@HongNguyen-my5oq]

Long over due vid. Anther great one to watch. Thanks

[@speedkar99]

Thank you :)

[@Do-lf8ne]

professor Toothbrush

[@speedkar99]

...reminding you to brush your teeth! :)

[@jangkulungkamei8215]

Haha...

[@franzeroque1999]

c=speed of light you would need to use v or speed of sound. c/f finds the wavelength in an electromagnetic spectrum

[@speedkar99]

+Franze Roque Agreed

[@ProVideR77cal]

About the spring you referred to at 3:49. Isn't it going to slow down your piston as the gases don't flow freely, due to the lower pressure? Sorry for my english

[@speedkar99]

+Prometheus Yes but mufflers are meant to make things quieter at the expense of power

[@ProVideR77cal]

ok thanks. I just wanted to be sure about it. Good job btw nice videos

[@ericmuschlitz7619]

nyat, drills the holes in bottom muffler to make water from keeping rusting, also holes make for lighter and for lighter go faster because race car.

[@speedkar99]

+Eric Muschlitz how about no muffler? No rust, no power lost, lighter and actually sounds like race car!

[@Ejexion]

The Corolla sounds awesome!

[@planetrob555]

Degrees? Or was 180 percent correct?

[@speedkar99]

Yes your right I meant to say 180%.

[@DjJtown]

When you're describing wave phases, the difference is measured in degrees and NOT percentage. Now if he was referring to the decibel level, then That's when a percentage level is used. So, the 2 sound waves are 180 Degrees out of phase.

[@yatesy2909]

If I create a gap between the flange and muffler will that cause an exhaust leak anything bad? /If I take my muffler off will anything bad happen to my exhaust/car?

[@speedkar99]

+MorganFromNewZealand Nothing bad will happen, it will just be noisy.

[@yatesy2909]

speedkar99 Awesome! The noise is kind of what I'm going for ;) Thanks for your reply

[@speedkar99]

+MorganFromNewZealand Muffler delete is a thing for ppl who want the noise without the expense.

[@Lightsleeper7005]

Great video bro! I wish more people made em like you!

[@speedkar99]

Thanks. I'll have an updated video on this soon.

[@sealteamryx6758]

Wouldn't drilling holes in your muffler screw the whole system up and make it sound like you have holes in your exhaust?

[@marshallreid1047]

The toothbrush was a great pointer

[@speedkar99]

Glad you liked it

[@Decco6306]

I like how he is using an old toothbrush to point at these complex equations

[@speedkar99]

I like the teach-brush too

[@ewzm]

I'm going over this accoustics stuff in my speech and hearing science class. Thanks for the detailed analysis.

[@eki63595]

Thanks a lot sir! Making a homemade muffler/baffle system on a motorbike. I've done this before but I keep forgetting the basics! Lessons that I keep learning again and again! Hey! Just like that song lyric from Two Kevins by the band Cigar. Anyway, thanks again! Peace.

[@speedkar99]

Awesome! Glad you learned something

[@sunitapalwa7097]

Dropping water from the starting of muffler is good or bad ?

[@1171karl]

I think the drilling of holes in the bottom might destroy all of that carefully engineered noise cancelling!

[@speedkar99]

Yeah it's a joke lol

[@maxcruz8696]

I'm straight piping my Crown Vic for sure!

[@speedkar99]

+The Ceiling Fan that would sound so cool with the v8

[@moparfam300c]

0:53 Race Car Moment...

[@speedkar99]

+Lean Clorox Yes gotta love VVT-i

[@RocketmanXO]

Drilling holes at the bottom of mufflers are ok?

[@speedkar99]

Not really

[@FordTransitvan]

Love this, straight to the point.

[@speedkar99]

I should section a straight pipe next then

[@yung_lemon6314]

Why does the straightpipe corolla sound good???

[@speedkar99]

It sure does

[@yung_lemon6314]

@@speedkar99 might have to try it myself

[@AliTaj5610]

Excellent demostration, thank you so much.

[@MetalMutant]

Which part is the muffler bearing?

[@speedkar99]

Ah I didn't show you that part.

[@mackendw]

do they all have the spring loaded flap in the last chamber before the gases exit the tailpipe? are these flaps prone to seizing up?

[@killthebums]

Very informative video chumlee

[@speedkar99]

+Richie Hanley thanks

[@ChrisYoungGunn]

I don't know why, but the toothbrush helped me understand even better

[@speedkar99]

Haha it sure helps

[@hansamsterdam2635]

where did you learn all that?

[@speedkar99]

+Hans Amsterdam I learn by experiment

[@hansamsterdam2635]

great