Repacking a Muffler? - FAR OUT!
ฝัง
- เผยแพร่เมื่อ 25 ส.ค. 2024
- In this episode: Repacking a motorcycle muffler made easy!*
(* the I-have-a-machine-shop version)
Also some exhaust/muffler talk.
Be sure to check out Pat Smage's channel here:
/ sherco125290
For more mototrials, RYP TV:
/ @factoryone_motorsports
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Music: Puppy Love Twin Musicom
Once your wife figures out you called her "this _old_ wife" you're probably going to weld with two separated shoulders Tony
exactly what I was going to write too :-)
Separated testicles seems more likely. Separated from his body.
Welding with two separated shoulders will be the least of ToT problems trying to find out what welding rod he needs to use to reattach his testicles and gentleman sausage now that will be the problem. Perhaps ToT should consider sleeping on his stomach until a suitable amount of roses, chocolates, and shiny jewelry has been bestowed to ToT “old wife” and he completed the fabrication of his chain mail jockey shorts otherwise ToT might need to change his initials to JWB (John Wayne Bobbit)
Separated nose.
separated sleeping quarters
That patrons only just absolutely killed me xD
Now I have to figure out how patreon works... and also talk my wife into butt videos. Can this old Tony do a video about negotiating wives into this sort of thing? Or is that how he really broke his shoulder?
But i am a patron🥺
I'm a patron too! Where's the link? 😜
@@micahelm2875 Pirate that booty! Repost for the good of yer crew matey!
@@marxuser is ToT pulling a Belle Delphine on us?
11:25 something This Old Tony doesn't get enough credit for is the production quality/editing. It's smoother and more thematically consistent than some _actual film_ channels, even though it's not the focus.
Great vid, great channel man. Thank you.
His content is certainly better than anything I've seen on these men-shows on TV
He is muy bueno. MUY BUENO!
fess up, you wanted to time-stamp the slow-mo-wifey and concocted this complement as a cover.
This Old Tony, the decibel system is a logarithmic scale. Even small drops are noticeable, especially in the center of our hearing (human hearing range is roughly 20 Hz to 20 kHz).
That spike at around 1900 HZ is well within our range. It's approximately A_6, which is at the high end of a soprano's vocal range. It looks like you knocked it down by 11 dB (I'm reading that as -30 dB to -41 dB). That's a large drop. 11 dB is like the drop from a loud stereo to a normal conversation.
If you're interested in the math, let L be the change in decibels and r be the ratio of new power divided by old power. The acoustic power equation is L = 20 * log_10 (r). (That 20 is there for more complicated calibration reasons with other scales.) So, the power ratio is, r = 10^(-11/20) ~= .28. You knocked 72% of the power out of that tone. Well done. :)
Even the low end has gotten a respectable drop. It looks like the peak noise level was around 120 Hz, dropping from -22 dB to -24.5 dB or so, which is a 25% drop in power.
And if that's not enough nerdiness for you, I'll offer this: human perception of sound (and light) is logarithmic. That is, our brains perceive a change of 10 dB to be roughly a doubling (or halving) of loudness. Our brains' internal logarithm mechanic is what gives us such a wide range of perceptible sound and light intensities.
Me thinks your an Audiologist or a Sound engineer....???
@@user-zq6pj5jo8j Applied Mathematician. :)
Uhh, dB is 1/2 at -3dB, 1/4th at -6dB, and 1/10th at -10dB, not halved at 10db, but 10 times quieter. He attenuated the fundamentals above 1khz by 8 and 16 times respectively. EDIT: Yeah, "perceived" makes a difference, but strictly speaking in dB what I said is correct.
@@eformance You know, I remembered the +/- 3 dB being doubling/halving too, but when I looked up the definition of the acoustic decibel scale I found a 20 instead of the expected 10. I was wondering if it had to do with an rms definition somewhere in the acoustic pressure measurements.
Edit: or a square inside the logarithm... the log would make that come out as a 2. I think that's it. If power (big P) is proportional to pressure (little p) squared, then it's:
L = 10 log(P_2/P_1) = 10 log(p_2^2 / p_1^2) = 20 log(p_2/p_1).
So my original comment is correct for pressure not power. That makes more sense to me now. Thanks.
That’s fascinating. Thanks, Miranda Antonelli.
Dude! Your wife rides a motorbike! That's awesome!
I can't imagine how hard it must be to ride it with a black bar in front of her eyes though.
not as hard as riding with a 'patrons only" sigh stuck to her derrière (that's fancy speak for "ass").
Você está tentando competir com o Justin Y?
@@oreubens That's why she's on a trials bike, you mostly ride those standing on the pegs.
@@Mishn0 so you're saying...
She's a trial wife... and she's into pegging ?
...and with TOT on the back.
Just curious, where did you find steel sheep?
Phillip K Dick's android farm
Robot sheep? Even livestock are losing jobs to automation these days.
Anyone already ride this sheeps? The must be pretty good alternative to all terrain bikes.?
I'm a cowboy
On a steel sheep I ride
And I'm wanted
D-ea-ea-ea-ea-d or al-i-i-i-i-i-i-ve
I guess Tony feeds his sheep like he feeds his cat...
"Patrons Only" - One of funniest things ever!! LoL! But you know when your wife sees it, she's going to break your other shoulder. 😮 LoL!
Worse, she'll take a cut!
I was literally laughing out loud.
I'm betting it was her idea. Just like the text message on the welder said...
@@crashk6 In an old married couple, can you even ever tell whose idea anything was? One of the two just happens to speak it out first.
looks like she rides a bike a lot better she don't fall...lol
6:31
"Why not open it at the factory seams?"
*immediately disregards own advice*
Obviously he decided it was better to re-open it at the faketory seams.
@@Zoidberg227 i see what ya did there
He probably did that as an excuse to clean up the bad surface after he'd finished repacking.
Also, there's the chance that who ever did it that way first knows something you don't about that specific muffler. And you know it worked doing it there before so it'll probably be fine again from there.
You shoulda changed the muffler bearings while at it mate.....
Lol. Way better than our "förgasarsnöre" (carburetor string)
Clearly, ToT was remiss in that regard, but I'm sure it was the distraction caused by his wife's messaging him in the middle of the welding process!
@Tim Siemssen well.... You have to install fresh spark plugs on the string first..... Rooky mistake.....
Surely you toped off the exhaust fluid while you were in there to
The before and after sounded the same because he forgot to plug the muffler back in. You gotta give it time to charge up.
Keep making videos like this. Doesn't matter if it is machining. Your jokes and humor along with the video production quality make every video worth watching. And each video has something new to learn in it.
I wish I could remember which video it was when I subscribed. I do know it was the first one I watched though. What would life be like without an Old Tony in it? I hope to never find out!
They always build the bike around that one part you need to get out. It's like " I guess while I'm just trying to refill the brake fluid I can go ahead and re-ring the piston since I had to take the jug off" LOL
TIP FOR TOT: use tin foil to stop the steel wool getting in the way of your weld
Where can I buy tin foil? All I can find is aluminum foil.
@@davidsteele8986 tin·foil
/ˈtinˌfoil/
noun
noun: tin-foil
foil made of aluminum or a similar silvery-gray metal, used especially for covering or wrapping food.
"garlic bread wrapped in tinfoil"
@@AlanColon1979 "Tin foil, also spelled tinfoil, is a thin foil made of tin. Tin foil was superseded after World War II by cheaper and more durable[1] aluminium foil"
en.wikipedia.org/wiki/Tin_foil
@@AlanColon1979 I don't think you got the joke
@@hawksights Not at all :)
Instead of bothering with all this work, I would have just set the bike to "mute". But hey, do it the old fashioned way if you want.
Acceleration is worse when muted.
if you really dont want all the noise from the exhaust just take the bloody thing off
There are electric Trials bikes that have factory Mute engaged.
Wow ! Never seen such clean machinist's hands !
All 11 fingers still attached too !
aga wait he has 11 fingers
Fuck he dont
Looking forward to the “Advanced Bad Practices” video.... I’m ready to up my game!
Me too lol
Hey Tony. I do those spectrum analysis things for the Navy. Granted what I deal with is underwater and the reference level is different, but what your spectrograms show is an 8x decrease in the level at 800Hz and a 16x reduction in noise level for the 1800Hz signal. The overall noise envelope seems to be roughly the same but it IS lower. Think of it this way, a reduction by 3dB is reducing total noise at a given frequency by HALF. Your two loudest sources show about a 9 and 12 dB reduction respectively. I would have to have the original recordings to do a full analysis on just what sources are causing the bulk of the noise if you want to quiet them......but then again, that’s not the point of motorcycles is it?
TY for summing up so well what I also saw. cheers!
I’m a patron though. Must be a higher tier to unlock that footage.
And if it is.... Where does it end?
you probably have to marry TOT
@@koitk That doesn't sound like an all-terrible plan B
koitk I do.
Probably have to pay the bills and not just contribute to them like the rest of us.
You don't give yourself enough credit Tony. The cleaned up muffer looked amazing. It almost looks like a cast piece, no welds! Keep stacking those dimes!
...This is when Tony admits he went and bought a new one !!
(Pretty sure it looks cast because he sandblasted it) He can lay down a nice weld, though. It DOES look like the last owner used some aluminum stick rods on it. I have a few pounds of Messer MG400's and it's super easy to let them get out of hand. They burn WAYYY faster than a regular electrode.
On second though, maybe he didn't blast it, might just be the lighting. Solid welds, either way.
Muffer 🤣😂
I'm sure Tony wouldn't cheat like that as he's master metalist!! But there's a dark side to him for sure .......
I'm in school to become a machinist, and we only go 2 days a week. The other 3 days we have to turn in a video of our choosing with a short paper on said video. I pick your videos every time. What a legend.
As unique and explanatory as your videos are - what is needed at this time is a video centered upon all the efforts that go into creating your videos. Camera placement, lighting, filters to show welding, the cut in's of the other TH-cam presenters - everything that goes into making your videos the polished final product you present to the world at large.
I have no interest in dirt bikes, but if This Old Tony is selling, I'm buying. Thanks for sharing!
Never had an interest either, but anything to quieten down the fu things is a win in my book.
It's always a good Sunday when the tot notification appears
Was thinking if I should drink a beer or not. Decided that if there is a new ToT video i'm getting a beer.
I was not disappointed :D
The Totification you mean
Tony, as much as I like metal work, I'm a sound engineer by trade. Looking at your SPL charts, I can tell you made quite a notable difference on the muffler. Human hearing considers a 10db difference to be twice as loud. Although you increased the some low frequencies a bit, you did manage to decrease a bunch of the mid range to about 9db. The difference between the minor low frequency increase and the larger mid frequency decrease is huge, in my book. I would say "mission accomplished".
This video is open right now because I went to sleep watching it. Not because it bored me, but because I use your videos and your soothing tones as the perfect lullaby to get me to sleep. Thank you thisoldtony, I almost managed a whole 5 hours last night because of you
Hey Tony, the seat fell off your motorcycle. Just wanted to give you a heads up! :)
Just a thought: keeping steel fibres from your weld? How about a simple lining of Aluminium foil? Just a thought.
Paper would probably be better, since it would harmlessly burn away unlike aluminum foil which melts funny and often blocks things.
i was thinking some thin aluminum sheet. It would take a couple small pieces, per side, but would shield the packing from the plasma arc...
@@D8W2P4 So thin it wouldn't matter, not enough melt to mess anything up in the muffler.
@@bosstowndynamics5488 Masking tape works well enough. The alloy body is going to suck heat away reasonably quickly, so the steel won't have much time to come up and poke through an already cooling puddle.
Sounds much smoother after your work. Tuning chainsaws for a few years really helps you develop an ear for exhaust notes; added benefit, you get to ignore anything less than 105db. Like needy customers, angry bosses, phone calls, etc.
My (limited) experience with working on mufflers, is that you can only make them louder.
From AvE to ToT, good sunday evening!
Drakkar Calethiel
Yup! Just got done watching AvE remove ticks lol
Drakkar Calethiel same here! From engine ticks to muffler repacking
Half-decent job, I still see *two* glaring holes in the muffler!
_clap clap_
wish l could ride like that
I wish my bike ran like that
youre right his wife got that front wheel WAY up
Hey Tony, I noticed from your before and after segment that you miced the exhaust In different place for both sections. Even though the difference was slight, that will drastically change the captured audio which was applied to the video and what you got from the freq analysis. It's too late now, but that data isn't any good, the only data that we have which is useful is how the bike sounds to you in person.
Source: 6 years as a live sound tech.
Sound before: Aaaaaaaa
Sound after: Ooooooo
It was noticeably smoother and nicer.
Omg dude you "cracked" me up with the patrons only sign :)
"This Old Wife" Love it! This is by far one of my favorite channels. You, Old Tony, are hilarious!
I must remember to watch your videos as near to the beginning of a day as possible. I always have a great day and that smile on my face carries me through it all. On the other hand, if I'm having a crappy day, your videos cheer me up and allow me to let my hair down and flap in the breeze. So, maybe I should watch each video once in the morning and again in the evening.
No, the sounds are VERY DIFFERENT.
The volume may be close (although I'd bet it's 5dB quieter, too) but the tone is very different and much improved. Thanks much. Despite my best efforts, I learned some stuff. Thumbs up to crush a troll.
@@mikecurtin9831 exactly, and that FFT view shows it! The highs are all gone and the result is much more deep and smooth
@@mikecurtin9831 5db is half the power, that's pretty substantial. Might not sound much different to some but that's more a testament to the dynamic range of human hearing, recorded it was noticeable, in person I'd wager more-so
The Patrons Only video is already on Piratebay.... :-)
And Pornhub....IN 4K :)
People still use piratebay?
Aye.
@Wayne Herby uh... Kinky?
@Коля I guess I don't download games anymore these days. I stick to rutracker and iptorrents.
Another fun video! So,uh, how does one become a patron? Asking for a friend.
Learned more about working with aluminum, had no idea that stuff is in the muffler, you have a warped sense of humor, God bless This Old Wife, as always, you make very enjoyable video’s. Thank you. From Missouri, JD
Long time viewer first time commenter always loved This Old Tony's humor. It's half dry half corny all genius. Keep it up man!
There was a big dip in the 10k to 20k section of the audio recordings. I also noticed that the higher herz were dampened a lot before i saw the measurements.
Would have to agree, observed the same thing (don't normally say anything, but Tony is asking so hey :p )
Yeah, I heard it too. And my hearing is crap these days, particularly at higher frequencies.
I was looking for a comment like this.
To me it's very obvious but yeah it might not sound like a night and day difference. Like the engine didn't change so it's making the same noises. The highs getting dampened that much just makes it sound much less whiny, gives it more meat.
This is why I hate morons in old civics with coffee can mufflers, they make the engine sound whiny and thin.
Agreed. There is a noticeable difference between the before and after shots, and the graph confirms it.
Tony, something to remember is that graph is a Logarithmic scale, so small differences on the graph can be pretty remarkable differences to your ears.
Same, I usually don't say anything either but audio is something I'm familiar with. The high end fall off between 10K and 20K and the plateau from 400 to 2000 Hz is completely gone. The spikes are still there but the intensity is significantly diminished. I'd say you did a fine job, probably could have packed more in and likely seen more drop.
Pat Smage has sick trial bike skills, insane, defies common sense of what a person can do on a bike
It literally doesn't matter at all what the topic of your video is or if I can relate to it at all, I still thoroughly enjoy it.
Seems to have taken the high pitch parts out, good enough for a muffler.
That Patreon only footage… Niiiice. Glad to be one!
"Quick pharmacological lesson to get everyone on the same pills:" earned my subscription.
After I found you I've spent the last two weeks watching all your videos from day one. Now I look forward to learning something new when I get that notification that a new one is out. Thanks Tony, you've made my shop s better place with your insight.
I think a better muffler packing would be kittens they would make it purr 👍
It's not. They just die.
@@shaunsurname8275 oh really(just poured water on my keyboard so my question mark doesnt work but imagine one here) don't you think 10223220 already knew that and was making a joke(another question mark)
@@shaunsurname8275 You're only half right - E. Schrodinger.
@@shaunsurname8275 LMAO
@@anullhandle About your cat, Mr S: good news, and bad news.
This Old Wife was the best! I just like your videos, makes my day better.
when she will ear about her nickname, worldwide famous already, ToT will lose his second arm and both legs.. it will be This Old Turtle in a cast, or he is amazingly lucky and married a diamond of patience and comprehension :)
There's definitely a difference in sound. The pingy spikes at 850 and 2000 Hz were probably the culprit. And I bet the difference is even more noticeable as the engine is revved.
Wait... all the magic of Old Tony, the insight, the humor, the tack sharp editing... AND sweet trials riding?! This is either a sign of the end times or a great start to my new year.
Finally. I've been waiting for days. Thanks for the great content.
You also high tier patreon?
Alex ja no. Just TOT starved and rewatching old videos for two weeks.
Awesome video as always! About your spectrum analysis. I think you’ve revealed the audible difference in the two peaks you point out, but you might be able to see some more differences at the low end if you tweak the settings. Reliable measures of annoyance with an uncalibrated measurement like this are deviations from a smooth spectrum and overall tilt as opposed to absolute level.
Try increasing the FFT length to 65536 and switch to a raised cosine window like a Hamming. At the moment you’re using a 2048-point window at 48 kHz, giving a spectral resolution of 23 Hz per bin. The smoothness at the low end is a result of the log scale and smoothing to make it easier on the eye. I’ve no idea what your idle speed is, but let’s say for argument’s sake it’s 1000 rpm, or about 17 Hz. At the combustion chamber we have something resembling an impulse train, which would produce a series of spectral peaks of similar height every multiple of 17 Hz, giving rise to those small ripples in the first peak that this short analysis can’t quite resolve. The manifold and muffler filter the impulse train to give the downward tilt of about 18dB per octave (a 3rd order filter) you recorded here. I’m no expert in exhaust design, but if the intake were lungs, the combustion a glottal closure and the manifold/muffler a vocal tract, you’d have a human voice. Now I’m more comfortable.
"Patrons Only", had me in stitches for 20 minutes. 11/10. :-D
This guy deserves an Oscar Award for editing & best story telling
More Mrs. Old Tony!
The repacked muffler exhaust is cleaner anyway - whether by trapping oil, or burning it somehow.
... also microparticles, caused by insufficient combustion, which, iirc, is intrinsic to two-stroke ...
As Orwell might have said: 'two stroke bad; four stroke good ... unless it's a Naiper Deltic Engine ...'
'Patrons only'. Man, I snortled my coffee through my nose at that one!
This channel deserves at least 642K subs. The most entertaining muffler repair I've ever watched.
Man I really learned a lot more about these trial bikes from your channel. I remember a few years back watching the X games Barcelona, and thinking wow I never seen a dirt bike like that. Now I been watching your repairs and learning more about this sport, and after watching your brakes video, now I know why you need to stop on a dime, because this is a lot of coordination with clutch, gas, amazing balance and both brakes to get them to stop immediately when you land on some tower or platform etc. pretty neat stuff, I hope this sport explodes, because dirt bikes for me are always fun to ride and racing is okay to watch, but this isn’t new but newer to me, and I love watching them take on these crazy courses. Love the machinist videos and the Cnc, and learning things that I prob may never use. I can weld just enough to get by never pretty but works. Love the content man.
Sunday evening TOT-Video? Hell yeah!!!
After seeing steel wool catch fire using a lighter, I have to ask: what keeps the steel wool from catching fire while welding the aluminum?
Argon.
@@tomf3150
Ah, so he purge welded it?
I guess that we will never know (since he didn't show us the footage).
Either he purge welded it, got lucky, or the steel wool burnt up in the process (and that could be a reason why he is not fully satisfied with the end resulting sound).
I knew a guy in college who used to put a strip of glass tape underneath the seams of the wool side before welding shut... just loose, but laid it in to keep the steel from poking out. He also didn't use steel wool, but picked up no-soap kitchen scrubbers from a commercial restaurant supply place that sold 'em by the dozen. Same idea as what you did, though -- a royal crapload of degreasing. That's what we get for running rich, I guess. Nice job. Love your stuff.
Your channel is not only informative and educating. It's the most entertaining on TH-cam!!! Thanks, as always!
I have an extra rubber glove for you if you still need one.
"while you were playing back that footage frame by frame"
projecting? we weren't the ones who hand-rotoscoped the "patrons only" box
I came here because of the thumbnail expecting something different. What I got? was even better! totally worth it.
Re your trials riding skills - riding with friends like Pat, what could possibly go wrong?
He is simply AMAZING! Great work from both of you.
I can give you some more information on the Spectrum analysis. I don't know the super complicated details but hopefully have enough information to help you learn more. First the dB scale is logarithmic, this means that if the sound level increases or drops by 6dB SPL(or whatever unit. Decibels aren't a unit of measurement) then that sound has either doubled in "energy" or is has half as much "energy", depending on what direction you take. Now for human hearing, when there is a 6dB change we hear roughly hear it as twice as loud or half as loud. (varies a little from person to person, situation to situation, etc.) So for your engine take a look at the before and after sound level for ~1900z. The peak on the "before" is at ~ -33dB and on the after it is ~ -42dB. Safe to say that at that Frequency range it is perceptually much quieter. At least half as loud now! Distance away from the sound source is very important too Inverse square law or whatever. if your mic was like 3 feet away and maybe off by 1 or 2 inches between each set up then you are probably fine. But if it was set up 4 inches away and you were off by 2 or 3 inches between set ups then that would have a HUGE impact.
Taking a step back and looking at the overall data we can see that the "before" data has a little more "fat" or over all energy compared to the "after". This means that there is a whole lot less sound energy coming through the muffler. When it comes to human hearing the more sound energy there is the "louder" it sounds. This doesn't ONLY mean the sound level is increasing for a specific frequency. Say you had a speaker that was basically perfect and a perfect tone generator. If you generated a tone at say 1500 Hz and keep that at 𝑥dB SPL then added another frequency at 2500 𝑥db SPL then it would sound Louder to us all.(I don't know the exact loudness change, it gets complicated the louder the sound and the distance of frequencies) Great example is the THX video. the THX video is increasing in Volume(over all sound energy), not increasing in Sound Level (the 𝑥dB SPL) but is increasing in loudness (human perception of sound). Yes Volume, Level, and Loudness are all different things! Your "after" has a lower volume, level, and loudness at almost every frequency. Is it noticeable? I mean, that changes from person to person. (Also humans hear a much higher sensitivity to certain frequencies. 𝑥dB SPL at 1000 Hz is a hell of a lot louder than 𝑥dB SPL at 20000 Hz)
The peaks that you see on the spectrum analysis are where sound is "resonating" and also probably producing harmonics. I am not too familiar with this stuff but with those larger more noticeable peaks you would probably be able to count the number of turns or chambers or whatever the gas explodes through. Then there are also harmonics that do strange stuff that im not going to go into because i really don't remember and we are listening to a muffler not a symphony. If you had a spectrogram we would be able to see a little more data that would be able to fine tune your bike with. But it is probably wayyy more complicated than it is worth.
I hope this helps.
The muffler after definitely had a more purple sound to it, maybe even a hint of lemon if you squint.
Every buddy has a personal toys so what ever we learn from you and others is good for earlier or later use thanks for showing up the tricks
Bro. You just earned a sub. I found your channel the other day with the square holes and clicked on this bc I dont own a motorized bike of anykind and needed to watch this. Your editing sir is amazing. Keep it up.
🤔 The baseball thru plywood should be a video on its own 😂
But seriously, hope u get better 😊
2 subscribes!?! Begging..... (lol). I can tell the difference in sound. The baffle did what a baffle does, it took the rasp off the top of the sound. Mission accomplished and great job as always.
With everyone on vacation for summer, TH-cam has been desolate. Thanks TOT, for keeping your viewers entertained!
I use broken beer bottle pieces to pack my mufflers. It doesn't make you itchy like fiberglass does and it lasts forever! If glass bottle chunks rattle too much for you, just put the broken bottle pieces through a pasta making machine. The kind with the rollers that turns blobs of dough in to noodles. My son's old Play-doh meat grinder/noodle maker works great for me!
Hi, I can hear the difference with high end headphones on. Not quieter, just sounds more refined for lack of a better word
The "before" sound had a bit of high-frequency knocking or rattling that was gone in the "after." Made it sound a little smoother. My guess is the finer steel wool and glass absorbed those frequencies better.
Yeah, I second that. There is a difference.. not much, but it does sound more.. quality?
No mike or camera setting changes made? Is the mike separated from the camera? Otherwise I doubt the outcome.
I noticed that too. The spikes were still there but the rest of the sound seemed a lot more smooth which made the spikes seem more dampened.
HA. Thought you had me with the "patrons only" blocker. Lucky for me im a thigh man!
I was today years old when I discovered This Old Tony not only rides dirt bikes, but owns a Sherco trials 2T to boot. Just when you thought a man's stock couldn't get any higher!
When hearing both before and after, i was thinking that there was a sharp midrange peak before the repack. And, of course, I wanted to see a spectrum plot. Thanks for anticipating my need. That sort of prescience is what makes TOT so satisfying.
1. You were lucky. I've seen all those perforated holes gunged up. Thats fun cleaning EVERY SINGLE hole out.
2. Nice to see you promoting the sport/hobby of trials.
3. However most of us clubmen/ old blokes riding novice routes get fed up being embarassed by the Tony Bous and Pat Smages of this world. Not fair.
4. Always used glass wool (ex packing) over steel wool myself. No particular reason other than thats always what i find in there and its a fair bit cheaper here.
Nice one. Cheers
Edit
Keep it up.
Muffler packing (absorptive damping) is good at removing high frequency energy which is why the two mid-frequency peaks you circled dropped a bit. The low frequency end doesn't change much unless you really strangle a motor and make lots of backpressure (OEM car exhausts or mufflers with complex tuning chambers). The other thing that works for low frequency drone is a 1/4 wavelength J-pipe, or a Helmholtz resonator (great at removing the drone frequency around 100-150Hz, but pipe tuning is critical).
You did hit on the placebo effect of "there I fiddled with it, it's better now". Don't you always find your car runs so much nicer after an oil change?
Great video though, always a good watch. Before, After.... Before, ...you sly bastard. Love it (and yes, I have).
This Old Tony = the king of making boring topics interesting and fun!
I only found this guy yesterday and I already absolutely adore his humor
30 + Years ago when I work for a Yamaha Dealership... we just roasted the 2 stroke mufflers in a burn barrel for 30 minutes and all ways good.
We used to do that as well. Mostly on mo-peds where the oily carbon would completely plug up the muffler to where they wouldn't even run.
@@hughmongous6613 mustn't take long to clog up those syringe size tubes
So... are you saying that Patrons have their own back side?
Thanks for the laughs TOT!
1:45 "at this point I'm convinced that they started with the muffler, and then built the bike around it as tight as they could".
I nearly choked laughing 🤣
Truer words have never been spoken.
Audio nerd here to decipher the chart for you: As far as those spectrum goes, it shows you really did a great job with the repack. The 800-2000Hz Peaks are smack in the middle of where ears are most sensitive (vocal range). That -12dB damping ~2Khz most importantly is ~56% perceived reduction in the nagging housewife range. (though something like 93% actual SPL reduction)
Pimping your wife out on patrons, that muffler filler must gave cost an arm and a leg.
just an arm for now..
A shoulder to be precise
this old wife presents this old couch
I was actually looking for a muffler repacking video and it turned out to be a ToT Vid! wow, the stars have aligned today.
Can I just say I love the editing style of fade/clipping the rambling end bits? It's all yours and it makes me giggle.
Seriously looking forward to those bad practices videos. And the patrons gag cracked me up. Thanks for that!
Now if you were working on the surface gauge I keep bugging you about... you may not have gotten hurt..but good too hear that you're feeling better.
Aaaah the smell of 2 stoke, brings back memories of my younger years. As a motorcyclist myself Ive never heard of anyone wanting a quieter bike, . Noisy bikes saves lives lol . Love your vids . Education and humour you bring it all . 😁👊
Personally I am glad that you are branching out into different videos like this Tony, sure I love the welding, machining and fabrication videos but it's also interesting to see another side of you and the other things you are passionate about, since part of the appeal and pleasure of your channel is your personality. Cheers :)
"The Six Million Dollar Man" sound... didnt her that for decades :)
I heard less high end noise maybe it’s just me but sounds good!
Two stroke pipe picture you posted from a motocross bike.... love you called it a stomach!! I grew up in a bike shop my dad owned and I remember thinking the same thing!
Your exactly right that old tony (of course) about the back pressure and exhaust gasses flow in relation to a two stroke power curve. I’d hear people saying “getting on the powerband” when I was a lad. “Getting on the pipe” is more accurate( and much easier to make jokes about drugs and pipes) but it was very rarely heard.
In general lamen terms that two stroke zip that’s so fun is that expansion chamber filling with exhaust gases essentially.
Appears your expansion chamber is more of a sweeping bulge where you installed the packing. This is only speculation but being a trials bike the expansion chamber so much farther back must have to do with that design producing more low end torque.
Anyway nice tig control
So entertaining for such a mundane topic. I was sad, as usual when it was over. I can hardly wait for the series on paint solvent evaporation rates...I know you'll nail that too.