I pad around 70 dollars in piping for the mild steel. And 550-600dollars in brass. But thats without the cusi3 welding wire and it needs pure argon as well. Its not ideal to do it this way but i cant go out and buy a tig and learn a new skill “like that” when im trying go be a husband, father of small kids, and go to work But one day i will try again. Using a tig
I remember in my town there was an old man that used to ride a Honda CBX 1050 6-cylinder with a brass exhaust, that thing was ridiculously loud, cops would always show up. The pipes looked awful but the sound was just incredible
ever came down my road with that shit wouldn't go out for sure! no one wants to be subjected to some one else's stupidity. like these idiots with the stereos... if i can be in my house and hear it then you are wrong, no ifs or buts. this takes stupid to new heights is all im saying... go to the track for that shit!
I have a recommendation for you. Take the brass pipes to an exhaust shop and ask them to make you a full catback brass system with an x pipe. I think it will sound very good like that
Exhaust/muffler shops don't really exist outside of north america, usually you buy an exhaust from a garage that does everything, or specialist motorsports fabricators will build you one
@@groeacht8525Brazil does have too. We have some artists down here, doing everything you want in matter of exhaust. From econoboxes turned into racing machines, and exotics supercars even (if you wanna see/hear, please search for "Secret Weapon Exhaust")
This is amazing man! It sounds like pure music to my ears. This is the best straight pipes I've ever heard in my entire life, big ups on the new invention and i really hope this reaches the entire car community! 🙏🏻👌🏻
Would be really cool to see a part 3 to this endeavor….adding a brass x pipe to the system 😅. I do appreciate your time you spent and the effort put into carrying this test out, because like you, I often wonder about things like this and wish I had the skill to carry them out haha.
If i can do it so can you. Its mostly a question of the equipment. Im just fortunate to have been gathering tools/equipment for a long time. And i dont do the jobs perfectly. Look at the welds lol
Y pipe does even better, both for flow/scavenging AND sound. If you want no restrictions, use the 7/5 rule to go from 2 pipes to one pipe (or vice versa for no velocity loss). If your duals are already slightly big and you want a slight bump in velocity, use the 4/3 rule instead. For sound, just make sure everything is equal length or it won't blend right. Same goes for the other crossover types, too.
While the sound of brass would still be superior to stainless, back then they had neither the metallurgy nor the tooling necessary to fabricate stainless pipe organs anyhow.
You asked what we wanted to see next. I think the success of your last two videos says it all: you should become the weird-material exhaust on TH-cam. Try bronze next time 😅 And try different thicknesses!
Thank you. Thats why im gonna put it on hold though😅 i want to make videos i like doing, and not only what others would like. I like experimenting. And will return to exhausts again as part of that. But i also want to do other stuff. Ideas is the only thing i wont run out of. Hope you have great day sir
You can tig weld brass very nicely, I believe as it’s a copper alloy you would also use helium gas as shielding. If you’re getting sheets of it also you could make a fully resonated and X piped system and tigged so it’s aesthetic as well as doesn’t effect the resonance like the mig welded with steel wire.
back in the 80s down here it was used to have a bronze "tip" on diesel trucks (mercedes 1114, ford700, dodge 800 and so on). those suckers screamed high and loud
I would think the steel would smooth the pipe resonation before the sound waves even hit the brass, for the 100% experience, you need brass headers all the way back, the the tone would be more loud, than flair out the ends like two little trumpets to look cool. Good vid.!
Another great video and I am actually surprised about the disclaimer about more power with straight pipes!! Appreciate your hard work and information!! Already looking forward to your next video 😍
Much like a two stroke, a four stroke engine has a power band, and much like a two stroke, adjusting the pipes alters the powerband. However unlike a two stroke, the effect isn't so dramatic that not having back pressure or pulse will do damage to a four like it will a two. But like a two stroke, open pipes are really only good for one throttle setting, WOT.... Drag race style high revving, clutch dumping, transmission blowing levels of high revving take off and racing. While having a proper back pressure, and properly timed exhaust pulse, will greatly increase the power seen at lower RPM for the exact same setup. Too much restriction, it chokes the engine, too little restriction and it "hyperventilates" the engine which causes losses of power in the low RPM ranges, while increasing the power in the high RPM ranges. Mind you that's all based on a properly tuned ECU, or a really good mechanic tuning a carb for it.
Damn! You really did it! :D I can tell the sound difference, not as drony and sounds better, but still really loud. Really cool to see! Keep up the great job man! And hope your health is good!
I have to say, that is the best exhaust video editing I have seen, like showing how it sounds inside and outside / at idle and driving and how you went back and forth a few times, good job, new subscriber now 👍
it's the collector quality that dictates a lot of the sound, the exhaust manifold and a high quality material on the manifold / collector is how to achieve the best sound. but this does prove that a good resonance material like brass can make a cool sound too. love it :)
I don't know if I'm just a crazy person.. but I wonder what would happen if you had about a dozen or so 10mm brass tubes inside a larger tube as the tailpipes. Might be a dumb idea, but it would have an affect on the sound waves, creating more organized and shorter waves. Then i wonder about 100 or so 1mm tubes also stuffed into a larger pipe. Titanium also has a noticable influence over the audible tone in exhaust... I really appreciate you taking the time to do these tests because I wondered the same thing about brass after seeing some clowns connect a brass instrument to an exhaust and it sounded badass, like a trumpet. So i was looking for other videos that would educate me and discovered your channel just a week ago. On your last video i was left wondering what it would sound like doing the whole system in Brass so i was delighted when i saw your video today. And excellent job on editing the back and forth clips. That really made it easy to notice the differences between the systems. Well done, keep up the good work my guy!
Truly wonderful how clean the bottom of your E46 is! As someone from Chicago, our cars rust so awfully because of road salt, I can't imagine seeing one in that condition!
Never once heard of brass used in exhaust but the tone is noticeably different, I think it’s pretty cool that you attempted this! Super entertaining! Great execution and also the 50-110km times and decibel readings were cool to see
i'm with you on the resonators + brass idea. I kinda preferred the tone of the brass as well even though the rasp was too much. This was a great experiment!
Awesome idea man, thanks for fronting the cost for this for us lol. I hadnt considered the effect of other metals on sound in exhaust. Of course, theres a reason for brass instruments, and different softness and resonance, etc. nice shop by the way!
Found you randomly thru the youtube algorithm, Thank you for the contribution, hope this vid gets tons of views. Sure, I'll subscribe, this was an interesting video to watch. Well done.
The title of the vid sold me. My thought was you were attaching pipe organ flutes to your car which tbh you're not far off from it. It sounds so interesting it could almost replace the entire brass section of the Vienna Philharmonic. 😁
I clicked this video expecting some American car or something, only to find a beautiful 330ci! I have a 330i as well so I was quite surprised. Great video
I find it interesting how the brass seems to mute the higher frequencies and maybe also accentuate the lows as well. It does look like the brass has thicker walls than the steel, so that's probably a factor, but brass also has different properties that could be doing that anyway.
Oh trust me the metal does make a difference, it's all i nthe acustics of the metal. There is a reason why we don't make steel trumpets, trombones and Tuba
@@SilvaDreams Imagine paying 3000$ for a steel trumpet for it to sound like a hawk having a stroke. Steel is good on many points but acoustic nowhere near it.
@@OEMplusRESTO Personally I like wrenching videos or people doing unorthodox/less conventional mods, like this video. But honestly man, just keep doing what you're doing. Make the videos YOU want to make!
Love your channel!!! Super cool to see a part 2 of the brass experiment! As you know, exhaust testing is totally a "rabbit hole". We may need a part 3. 👍 Your quest for a heavenly brass sound might be just around the corner. Like you mentioned, the true duals are losing some scavenging effect of a cross over. An x-pipe would serve this porpose as well as additional change in tone/ drone reduction. Hook this up to your schmeidmann headers. The stock catalyzed manifolds just don't give you much anything good to work with in terms of quality sound unfortunately. As you know, the first few feet of an exhaust is critical in terms of sound alone, especially in a stright pipe configuration. Headers make such a big difference. I am amazed at how much the brass changes the tone. I would say the resonance is even more dramatic than titanium. Might be worth going down the "rabbit hole" just a bit further, ya know, for science...😂 Send me your contact info. / email.
If you have the room for it, I think an equal length header from each cylinder into 2 collectors, alternating cylinder firing, each into its own brass straight pipe would sound awesome
Thanks for doing the inserts in the brass: my pick if not stock ;) The resonances ("drone") in the steel system won't be replicated in the brass purely because of the diameter difference. You can see this in your warm idle dB measurement and your performance measurement: the larger diameter of the brass pipes gives lower gas velocity at low (/no) throttle openings by the time the exhaust pulses reach the tips, which translates to lower sound pressure level in the low audible frequencies and slightly poorer torque before the VANOS is fully advanced. If you did a top speed run or some time attack laps all above 5000rpm the brass would probably be faster. The lower gas velocity overall gives the pulses more time to smear out and exit in a less coherent "pop", and unlike the steel (or a 4" fully hektik JDM hero exhaust in steel AKA drone box), the brass doesn't naturally reinforce the low frequencies. By my calculations at 2000rpm each of your twin pipes is delivering 2000/2/60*3=50 pulses of pferdestaerke per second. That's a bit too low frequency for most people to hear, but the second harmonic at 100Hz is right there in that annoying drone zone most people can. Hit your steel system with a spanner while using an audio spectrum analyser app on your phone and I'll bet you can get some peaks around 1-200Hz. Try it again with the brass and i bet the spikes are all higher up, and thus will move more on a running engine as the pipes find and lose natural resonances with the higher exhaust harmonics which change more as the ecu varies rpm and timing to hold idle setpoint/while driving => more "musical" exhaust tone. Even in your intro, the brass muffler delete is obviously brighter (despite it actually being both a longer and wider pipe: should be lower tone if same material). For future experiments do like instrument manufacturers (or at least repairers) do: solder/braze the brass with a blowtorch and plumber's silver solder: less fumes, better seal, wouldn't last a sprint race perhaps but that's not relevant for your tests. For reference the decibel formula is Power Ratio [dB] = 10*log10(PowerOUT/PowerREF) (in whatever power units are most convenient) so a sound that is +3dB vs some reference is twice as powerful (~"loud"). This means a 12dB difference is telling you one sound is 2^4=16 times as loud as the other. Brass pipes give a warm idle half as loud as mild steel. That's impressive.
The brass definitely gives it a more exotic sound, wonder how it would sound going into a single pipe, or through an x pipe setup. Another one that would be interesting to hear is carbon fibre or carbon kevlar pipes.
@@OEMplusRESTO i know you can "cure" or anneal(?) 3d printed filiments to make them stronger and more temp resistant. How hot does exhaust get? Im sure it can handle 200degrees as ppl have used it in intake,under hood applications such as ITBs and other parts
Subbed after last "brass video" so worth it. Great work 👍👍👌👌 Love the full Brass exhaust. P.S. Cheap Upgrade next. But maybe the Full Detailing clean might get more views
I noticed less rasp in heavier gauge stainless steel exhausts ages and ages ago, as a kid watching muscle car videos (our market is huge! so finding same brand and design with different quality metal was not hard) so i love that you did this but the end result of it being raspier was what i expected, to be blunt. Not personally a huge fan of excess rasp but there are easier ways to achieve this if its something someone desired, namely you just need a large section of pipe that starts resonating (aka, blank pipe uninhibited by extra supports, muffling, or anything that would weight it down.) Similar but slightly different effect a enlarged diameter exhaust tip can do similar, doesn't have to be a muffler literally just a tip. If you want less rasp and just to try brass you could fit resonators mid-way up after largest connecting point near headers, thats cheapest easiest anti-rasp method i know but rare to find since it requires more fab then just sticking resonators at butt end of exhaust when it comes to DiY builds. I like "Bullet" style mufflers for this approach, but all that would have to be made out of steel unless you fabbed brass ones, drilled all the holes and packed the matting to replicate one yourself.
Add an X pipe in the straight through dual system, won't be as well tuned as the BMW system ( they compensate for the slightly different lengths from front and rear headers to merge point ) but will restore the pulse merge extraction effect that is lost with a plain dual straight through. Revs the effect is strongest at will depend on the distance from manifolds to x-pipe.
You found out how to make it sound like a Honda! I kid, mostly, I think some the other commenters are right though. If you did some sound engineering with a shop that was capable, like just running a brass X-Pipe or a resonator as you mentioned in the video it could be epic! Also epically loud...
Very interesting, appreciate guys like you that try something new. The details in this video are great, from accelerating times to sound differences, just perfect. Would be interesseting so see what an x pipe or h pipe does tho this engine, I saw an old man from Merica who is master in exhaust systems on old v8 cars and one got me hooked on this… The perfect place to put a x or h pipe is, you draw with a crayon a line on the exhaust from the start to the end, the part where the crayon don’t burn is the place to put the x or h pipe . Greetings from Russia and Germany
Great video , I’d never seen or heard of brass exhaust pipe. There was a guy in Troon Ayrshire GB that worked with E-type jags old 1930s RollsRoyce etc and although I didn’t actually see 1 I was reliably informed he had full copper systems on some of his vehicles for better sound. Hope that interests someone
The straight pipe exhaust might be more beneficial at higher RPM. A test where the initial acceleration starts at a higher RPM/ lower gear may show benefit for the straight pipe, but honestly who's gonna drive around the streets redlining their car all the time.
My suggestion it to progressively make the exhaust larger so it’s roughly shaped like a horn. Maybe weld sections of pipe together increasing the diameter.
The cost of brass piping for this mod... I salute you for contribution.
Thank you
I used 6.2m for those interested. 5.2 meter of 50mm outside diameter and 1m of 64mm outside diameter tubing
@@OEMplusRESTO how much more expensive the brass pipe is compared to steel pipe? I have no clue about brass prices
@@Taikauskoguesstimate 5x the price of mild steel
I pad around 70 dollars in piping for the mild steel. And 550-600dollars in brass. But thats without the cusi3 welding wire and it needs pure argon as well. Its not ideal to do it this way but i cant go out and buy a tig and learn a new skill “like that” when im trying go be a husband, father of small kids, and go to work
But one day i will try again. Using a tig
I have never once asked what brass pipes would sound like.... But i thank you for this video. Very informative and satisfying my tism
the first 3 seconds immediately sold me.
I remember in my town there was an old man that used to ride a Honda CBX 1050 6-cylinder with a brass exhaust, that thing was ridiculously loud, cops would always show up. The pipes looked awful but the sound was just incredible
I can only imagine how the greatest sounding engine ever would sound with brass exhaust!
ever came down my road with that shit wouldn't go out for sure! no one wants to be subjected to some one else's stupidity. like these idiots with the stereos... if i can be in my house and hear it then you are wrong, no ifs or buts. this takes stupid to new heights is all im saying... go to the track for that shit!
@@t16205that is nowhere near the best sounding engine lmao
@avaubanprime6972 they are one of my favorites actually when they have a proper exhaust system on them.
@@avaubanprime6972 "nowhere near the best sounding Lmao"
Ok dude. I guess you never actually heard one then
I have a recommendation for you. Take the brass pipes to an exhaust shop and ask them to make you a full catback brass system with an x pipe. I think it will sound very good like that
Id probably diy it but thank you for the great suggestion:)
@@OEMplusRESTOplease, i would love to fit one myself
Exhaust/muffler shops don't really exist outside of north america, usually you buy an exhaust from a garage that does everything, or specialist motorsports fabricators will build you one
@@groeacht8525Brazil does have too. We have some artists down here, doing everything you want in matter of exhaust. From econoboxes turned into racing machines, and exotics supercars even (if you wanna see/hear, please search for "Secret Weapon Exhaust")
theyre 100% not going to be able to braize brass at an exhaust shop
This is criminally an underrated channel.
3:00 love the way u flipped back and forth btwn the 2 comparing noises
first slowly then faster
perfect
thank u
never seen it done so well !!
i’ve literally been wondering what brass exhaust would sound like for the past few days so thanks for sharing this fun little exploration !!
Thank you for the aupport bro. And me too. Thats why i had to make a video of it. Been wondering for wayyy to long lol
indeed, best sound comparison mechanism.
@@OEMplusRESTOagreed, very well done video. Subbed!
Great work on the multiple sound clips. Different settings, scenarios - impressed with your thorough approach.
This is amazing man! It sounds like pure music to my ears. This is the best straight pipes I've ever heard in my entire life, big ups on the new invention and i really hope this reaches the entire car community! 🙏🏻👌🏻
Thank you. That was very kind of you to say🙏
@@OEMplusRESTO no problem man , that exhaust is amazing! Keep up the awesome work you are doing! 🙏🏻
I don't know why but your accent makes this 100 times better.
We call it Danglish around here. Oddly i get this comment alot🤣
@@OEMplusRESTOMy guy you sound like Arnold Schwarzenegger I watched your entire video it was great Yeah😊
😊
@@Dillionmcfry im taking all of it as an accomplishment. Maybe one day i get to live my childhood fav movie and fend off a predator lol
You'd definitely pick up a lot of lady viewers if you were covered in mud in a tree for the next video lol @@OEMplusRESTO
@@OEMplusRESTO Yeah 😄😄😄😀😁😁
Would be really cool to see a part 3 to this endeavor….adding a brass x pipe to the system 😅. I do appreciate your time you spent and the effort put into carrying this test out, because like you, I often wonder about things like this and wish I had the skill to carry them out haha.
If i can do it so can you. Its mostly a question of the equipment. Im just fortunate to have been gathering tools/equipment for a long time. And i dont do the jobs perfectly. Look at the welds lol
Y pipe does even better, both for flow/scavenging AND sound. If you want no restrictions, use the 7/5 rule to go from 2 pipes to one pipe (or vice versa for no velocity loss).
If your duals are already slightly big and you want a slight bump in velocity, use the 4/3 rule instead. For sound, just make sure everything is equal length or it won't blend right. Same goes for the other crossover types, too.
No wonder the brass sounds better... Why do you think they used brass pipes for those huge organs in churches. SOUND QUALITY!
Those used lead 😅
@@drzandlcplead/tin alloy pipes and copper pipes also btw
While the sound of brass would still be superior to stainless, back then they had neither the metallurgy nor the tooling necessary to fabricate stainless pipe organs anyhow.
Wow, I can't believe how clean your car is underneath - it looks new! Wish my 330Ci was that clean underneath. Keep up the good work👍
That's because he recently restored the underside of his car
Fr looks very clean i need to bring my coupe back to glory too
Stumbled upon this channel randomly. But agreeing to several comments here, this indeed is an underrated channel🔥
I knew it was a bmw the second you turned it on. Sounds is unmistakable
This brass exhaust must be what all those 350z guys are running
35 ounce guys
😂😂 how'd you know
I got a Z and I’m now looking into this 😂😂😂😂😂😂😂😂😂😂😂😂
@@ninjazombie6660 I have a Cr-Z and I'm now looking into this.
@@zeniey send it I’m a Toyota mechanic
You asked what we wanted to see next. I think the success of your last two videos says it all: you should become the weird-material exhaust on TH-cam. Try bronze next time 😅
And try different thicknesses!
Thank you. Thats why im gonna put it on hold though😅 i want to make videos i like doing, and not only what others would like. I like experimenting. And will return to exhausts again as part of that. But i also want to do other stuff. Ideas is the only thing i wont run out of. Hope you have great day sir
Love how the brass exhaust makes it sound like it is revving higher.
Bro you had me at the thumbnail 🤣🤣🤣
Im worried its a bit too offensive but i’ll see where it takes me lol
@@OEMplusRESTO No mate! It's definitely a keeper 😁😂
😂 got me wondering first why would you use that in thumbnail, then i got... nice comparison and tests! Can't wait for more tests to come.
brassers 💀
@@OEMplusRESTOI thought it was clever😅😂
I'm sure you'll never stop trying improve this car! Never change!
You can tig weld brass very nicely, I believe as it’s a copper alloy you would also use helium gas as shielding. If you’re getting sheets of it also you could make a fully resonated and X piped system and tigged so it’s aesthetic as well as doesn’t effect the resonance like the mig welded with steel wire.
back in the 80s down here it was used to have a bronze "tip" on diesel trucks (mercedes 1114, ford700, dodge 800 and so on). those suckers screamed high and loud
I would think the steel would smooth the pipe resonation before the sound waves even hit the brass, for the 100% experience, you need brass headers all the way back, the the tone would be more loud, than flair out the ends like two little trumpets to look cool. Good vid.!
Antique engines had alot of brass parts.
Another great video and I am actually surprised about the disclaimer about more power with straight pipes!! Appreciate your hard work and information!! Already looking forward to your next video 😍
Much like a two stroke, a four stroke engine has a power band, and much like a two stroke, adjusting the pipes alters the powerband.
However unlike a two stroke, the effect isn't so dramatic that not having back pressure or pulse will do damage to a four like it will a two.
But like a two stroke, open pipes are really only good for one throttle setting, WOT.... Drag race style high revving, clutch dumping, transmission blowing levels of high revving take off and racing.
While having a proper back pressure, and properly timed exhaust pulse, will greatly increase the power seen at lower RPM for the exact same setup.
Too much restriction, it chokes the engine, too little restriction and it "hyperventilates" the engine which causes losses of power in the low RPM ranges, while increasing the power in the high RPM ranges. Mind you that's all based on a properly tuned ECU, or a really good mechanic tuning a carb for it.
Damn! You really did it! :D I can tell the sound difference, not as drony and sounds better, but still really loud. Really cool to see! Keep up the great job man! And hope your health is good!
You too
Make a brass muffler or resonator?
Mate your channel is underrated.. hope it picks up steam. Thank you for all the hard work.
Thank you for the kind words. Me too
I have to say, that is the best exhaust video editing I have seen, like showing how it sounds inside and outside / at idle and driving and how you went back and forth a few times, good job, new subscriber now 👍
it's the collector quality that dictates a lot of the sound, the exhaust manifold and a high quality material on the manifold / collector is how to achieve the best sound. but this does prove that a good resonance material like brass can make a cool sound too. love it :)
I don't know if I'm just a crazy person.. but I wonder what would happen if you had about a dozen or so 10mm brass tubes inside a larger tube as the tailpipes.
Might be a dumb idea, but it would have an affect on the sound waves, creating more organized and shorter waves. Then i wonder about 100 or so 1mm tubes also stuffed into a larger pipe.
Titanium also has a noticable influence over the audible tone in exhaust...
I really appreciate you taking the time to do these tests because I wondered the same thing about brass after seeing some clowns connect a brass instrument to an exhaust and it sounded badass, like a trumpet. So i was looking for other videos that would educate me and discovered your channel just a week ago. On your last video i was left wondering what it would sound like doing the whole system in Brass so i was delighted when i saw your video today.
And excellent job on editing the back and forth clips. That really made it easy to notice the differences between the systems. Well done, keep up the good work my guy!
Great ideas!!!!! Sounds like it could make an exotic sounding tone.
Truly wonderful how clean the bottom of your E46 is! As someone from Chicago, our cars rust so awfully because of road salt, I can't imagine seeing one in that condition!
Thank you
Never once heard of brass used in exhaust but the tone is noticeably different, I think it’s pretty cool that you attempted this! Super entertaining! Great execution and also the 50-110km times and decibel readings were cool to see
I really shouldn´t give you a like... You know Janteloven and all...
But since there is less than 6 million of us, I will support you... God vid...
i'm with you on the resonators + brass idea. I kinda preferred the tone of the brass as well even though the rasp was too much. This was a great experiment!
Awesome idea man, thanks for fronting the cost for this for us lol. I hadnt considered the effect of other metals on sound in exhaust. Of course, theres a reason for brass instruments, and different softness and resonance, etc. nice shop by the way!
Thank you
love the accent and the commentary, keep up the good work bro 👍
Found you randomly thru the youtube algorithm,
Thank you for the contribution, hope this vid gets tons of views.
Sure, I'll subscribe, this was an interesting video to watch.
Well done.
Thank you for the sub and kind words
love your vids man, so glad i discovered your chanel !
Thank you. Im happy you did
Transfers more lifter noise and is the same otherwise. I salute you.
I would love to see it clay bar and detailed. Thanks for taking the time to try the experimental exhaust.
Brass admittedly sounds amazing in the exhaust.
The title of the vid sold me. My thought was you were attaching pipe organ flutes to your car which tbh you're not far off from it. It sounds so interesting it could almost replace the entire brass section of the Vienna Philharmonic. 😁
Turning the straight six into an organ:)
I used to run copper pipe on my mini bike Briggs & Stratton. It produced green flames. Only visible after dark but cool looking.
Sounds extremely cool honestly
this video is so well done. I was surprised you don't have a mil subscribers yet. Perfect side by side comparisons!
Thank you.
Massive work to get this video done! Good job!
i was going to do this in the summer!! Kudos! great idea!!!!! sitting here excited for the test xx
I clicked this video expecting some American car or something, only to find a beautiful 330ci! I have a 330i as well so I was quite surprised. Great video
Great engine, great chassis. So much so i have built an entire yt channel around it. Hope yours is treating you well
I find it interesting how the brass seems to mute the higher frequencies and maybe also accentuate the lows as well. It does look like the brass has thicker walls than the steel, so that's probably a factor, but brass also has different properties that could be doing that anyway.
Lenght of pipe plays a factor as seen with organ pipes.
Oh trust me the metal does make a difference, it's all i nthe acustics of the metal. There is a reason why we don't make steel trumpets, trombones and Tuba
@@SilvaDreams Imagine paying 3000$ for a steel trumpet for it to sound like a hawk having a stroke. Steel is good on many points but acoustic nowhere near it.
Sometimes we don't know we need the answer to things and I'm glad others ask for me. Loved it. Xpipe!!! Brass
Best up and coming BMW TH-camr. I've binged a lot of your content and I love your work. Very good stuff here. Keep it up man!
Thats extremely kind of you to say. Thank you. Would you prefer a super service, cheap mods, or full detailing video?
@@OEMplusRESTO Personally I like wrenching videos or people doing unorthodox/less conventional mods, like this video. But honestly man, just keep doing what you're doing. Make the videos YOU want to make!
This was awesome and I’m cracking up at your welds lol good honesty!
Looks like a blind man welded them lol. Who cares. We still sent it
I'm liking this before I get past the intro, what a interesting idea!
the steps...the KEY is the steps for that f1 sound !
Yes, stepped tubes in the header & cone after collector or in mid pipe!
Love your channel!!! Super cool to see a part 2 of the brass experiment! As you know, exhaust testing is totally a "rabbit hole". We may need a part 3. 👍 Your quest for a heavenly brass sound might be just around the corner. Like you mentioned, the true duals are losing some scavenging effect of a cross over. An x-pipe would serve this porpose as well as additional change in tone/ drone reduction. Hook this up to your schmeidmann headers. The stock catalyzed manifolds just don't give you much anything good to work with in terms of quality sound unfortunately. As you know, the first few feet of an exhaust is critical in terms of sound alone, especially in a stright pipe configuration. Headers make such a big difference. I am amazed at how much the brass changes the tone. I would say the resonance is even more dramatic than titanium. Might be worth going down the "rabbit hole" just a bit further, ya know, for science...😂 Send me your contact info. / email.
Thank you for the tips. You can dm menat instagram. Link is in the channel description:)
11:45 Good to see you enjoying the process. I sure did. Cool project. Thanks for posting it. Have a good season 🤘🏼
Thanl you. Im happy you did. And a good season to you too sir
If you have the room for it, I think an equal length header from each cylinder into 2 collectors, alternating cylinder firing, each into its own brass straight pipe would sound awesome
Thanks for doing the inserts in the brass: my pick if not stock ;)
The resonances ("drone") in the steel system won't be replicated in the brass purely because of the diameter difference. You can see this in your warm idle dB measurement and your performance measurement: the larger diameter of the brass pipes gives lower gas velocity at low (/no) throttle openings by the time the exhaust pulses reach the tips, which translates to lower sound pressure level in the low audible frequencies and slightly poorer torque before the VANOS is fully advanced. If you did a top speed run or some time attack laps all above 5000rpm the brass would probably be faster. The lower gas velocity overall gives the pulses more time to smear out and exit in a less coherent "pop", and unlike the steel (or a 4" fully hektik JDM hero exhaust in steel AKA drone box), the brass doesn't naturally reinforce the low frequencies.
By my calculations at 2000rpm each of your twin pipes is delivering 2000/2/60*3=50 pulses of pferdestaerke per second. That's a bit too low frequency for most people to hear, but the second harmonic at 100Hz is right there in that annoying drone zone most people can. Hit your steel system with a spanner while using an audio spectrum analyser app on your phone and I'll bet you can get some peaks around 1-200Hz. Try it again with the brass and i bet the spikes are all higher up, and thus will move more on a running engine as the pipes find and lose natural resonances with the higher exhaust harmonics which change more as the ecu varies rpm and timing to hold idle setpoint/while driving => more "musical" exhaust tone. Even in your intro, the brass muffler delete is obviously brighter (despite it actually being both a longer and wider pipe: should be lower tone if same material).
For future experiments do like instrument manufacturers (or at least repairers) do: solder/braze the brass with a blowtorch and plumber's silver solder: less fumes, better seal, wouldn't last a sprint race perhaps but that's not relevant for your tests.
For reference the decibel formula is Power Ratio [dB] = 10*log10(PowerOUT/PowerREF) (in whatever power units are most convenient) so a sound that is +3dB vs some reference is twice as powerful (~"loud"). This means a 12dB difference is telling you one sound is 2^4=16 times as loud as the other. Brass pipes give a warm idle half as loud as mild steel. That's impressive.
The brass definitely gives it a more exotic sound, wonder how it would sound going into a single pipe, or through an x pipe setup.
Another one that would be interesting to hear is carbon fibre or carbon kevlar pipes.
Oh.. hadnt thought of carbon. But what temp does it handle?
@@OEMplusRESTO i know you can "cure" or anneal(?) 3d printed filiments to make them stronger and more temp resistant. How hot does exhaust get? Im sure it can handle 200degrees as ppl have used it in intake,under hood applications such as ITBs and other parts
Its not cf and it cant@@TexTheMaster
@@mudargamer yes it can and you can get cf filiment. I use it on a 6.8l v10 in engine bay
@@TexTheMaster exhaust gas is like 1000 celsius, much higher than the engine bay. The filament would not survive
Sweet informative video with a TON of sound clips. Thanks
Thank you for the kind words:)
This sounds AMAZING
bro the brass sounded the best for me i like the burbles and remember me when you are famous
Lol. Thank you:)
Subbed after last "brass video" so worth it. Great work 👍👍👌👌
Love the full Brass exhaust.
P.S. Cheap Upgrade next. But maybe the Full Detailing clean might get more views
You my good sir earmed a sub with the quality and delivery of this video.
Thank you Sir. Much appreciated
This was great, thank you! Subscribed!
Thank you
i think the brass pipe and insert sounded the best
That brass exhaust sounds really nice actually :P
That brass sounds great
Bro. You sound like a villain, love your accent in the manliest way possible... Awesome video, good job.
Most people tell me i should yell “get to the chopper”.. i prefer your take on it🤣
props for following up on the last video, esp considering the tubing isn't cheap. big kudos and a subscribe from me!
I have a brass catback on my 2jz and it sounds amazing. great detailed comparison testing!
Best straight 6 with best exhaust.. i can imagine
Can you put on sunglasses and say "I'll be back"?
Hahahaha. Maybe
Do it! 😂
😂😂😂😂
just what everyones been waiting for
Absolutely phenomenal!
I mean, there's a reason why brass is used in musical instruments.
Sound in part. But durability, aesthetics, and anti-microbial properties all lead to brass as a great option for musical instruments.
A super service would good next for now, love your e46 content👌🏻
I noticed less rasp in heavier gauge stainless steel exhausts ages and ages ago, as a kid watching muscle car videos (our market is huge! so finding same brand and design with different quality metal was not hard) so i love that you did this but the end result of it being raspier was what i expected, to be blunt. Not personally a huge fan of excess rasp but there are easier ways to achieve this if its something someone desired, namely you just need a large section of pipe that starts resonating (aka, blank pipe uninhibited by extra supports, muffling, or anything that would weight it down.) Similar but slightly different effect a enlarged diameter exhaust tip can do similar, doesn't have to be a muffler literally just a tip.
If you want less rasp and just to try brass you could fit resonators mid-way up after largest connecting point near headers, thats cheapest easiest anti-rasp method i know but rare to find since it requires more fab then just sticking resonators at butt end of exhaust when it comes to DiY builds. I like "Bullet" style mufflers for this approach, but all that would have to be made out of steel unless you fabbed brass ones, drilled all the holes and packed the matting to replicate one yourself.
Thanks for the input. Will try out resonators one day😃
Sounds like it revs higher with the brass which is always a plus
Never thought of this, interesting concept.
I really like the sound of the brass pipes, at least through headphones, obviously a but different from in person.
And Maisteer said material didn't matter... Great one!
Add an X pipe in the straight through dual system, won't be as well tuned as the BMW system ( they compensate for the slightly different lengths from front and rear headers to merge point ) but will restore the pulse merge extraction effect that is lost with a plain dual straight through. Revs the effect is strongest at will depend on the distance from manifolds to x-pipe.
You found out how to make it sound like a Honda!
I kid, mostly, I think some the other commenters are right though. If you did some sound engineering with a shop that was capable, like just running a brass X-Pipe or a resonator as you mentioned in the video it could be epic! Also epically loud...
That actually looks awesome
Super service and acceleration numbers after
Exactly🙏
Brass sounds like a different car, it sounds nice!
Very interesting, appreciate guys like you that try something new. The details in this video are great, from accelerating times to sound differences, just perfect.
Would be interesseting so see what an x pipe or h pipe does tho this engine, I saw an old man from Merica who is master in exhaust systems on old v8 cars and one got me hooked on this…
The perfect place to put a x or h pipe is, you draw with a crayon a line on the exhaust from the start to the end, the part where the crayon don’t burn is the place to put the x or h pipe .
Greetings from Russia and Germany
Great video , I’d never seen or heard of brass exhaust pipe.
There was a guy in Troon Ayrshire GB that worked with E-type jags old 1930s RollsRoyce etc and although I didn’t actually see 1 I was reliably informed he had full copper systems on some of his vehicles for better sound.
Hope that interests someone
Thank you. It interests me😎
The thickness of the material would be an interesting addition along with some acoustic tuning similar to a wind instrument.
WELL WELL WELL. i like the cut of your jib, sir!
Cool name❤️
Very interesting video - I would have never thought about using brass!😎
Thank you:)
Brass with inserts really delicious
The straight pipe exhaust might be more beneficial at higher RPM. A test where the initial acceleration starts at a higher RPM/ lower gear may show benefit for the straight pipe, but honestly who's gonna drive around the streets redlining their car all the time.
My suggestion it to progressively make the exhaust larger so it’s roughly shaped like a horn. Maybe weld sections of pipe together increasing the diameter.
*A pipe bender would be a good investment...*
Imagine a Paganini brass exhaust system probably would be absolutely insane 🤯
I mean, maybe it's just my speakers on my phone but the tone of the brass sounded better than the steel. Loud as shit for sure though.
I like your tool storage management
Its not only cheap and effective, its extremely modular. Need a new holder? Just a new screw
I love the the brass sound
I love the Brass exhaust and I will look at the Cost between Titanium VS Brass. Thanks so Much
Thank you for the input
If you swap the corners for curves for the bends this would sound epic, there's a reason why trumpets and horns are made of brass.