STEP THE HEADERS.. Smallest diameter first than increase diameter by half of an inch every 12 inches until you have three different diameters. Will sound like a biblically accurate angel singing.
A old hotrodder trick is paint the headers towards the collector and run it. Where the paint stops burning off is where you need to cut the collector, it's the optimal length.
i looked up the frequency on the cars and also from your 4 rotor. so what you can see from the frequency/hz is that the short intake come closed by the mazda 787b but i also see in the graphs that your car has 4 clear peaks while mad mike and the 787b only have 3 peaks. these are guidelines the distance microphone environment can make a difference time stamp, cars, frequency (hz) 00:47 mazda 787b 651 and 1307 and 1945hz 00:55 mad mike 540 and 1090 and 1141hz 01:07 old toyota 509 and 768 and 1022 and 1280hz 29:49 new toyota 529 and 791 and 1053 and 1317hz 10:10 dyno run short 627 and 935 and 1243 and 1556hz
@Maisteer has a video called "how F1 Sound is made" he talks about how stepped headers change the sound. I think it's a solid video, he also mentioned equal length headers and equally spaced firing order.
Did you miss the part where Adam said "they won't share with us their header design unless we bought a complete engine", James has a PPRE engine, and i'm sure that comment from Adam was pointed at them (PPRE, not James) and some others.
Ppre has designed a engine and exhaust system that work together . They have lost of money in research and development over decades so it makes sense to protect it. So just coping a design from a different engine builder won't achieve the same results . If he wanted a turn key package that sounds like the 787b he should have brought a package from them
man i fricken love a nice Johan heavy video. hes such a skilled individual and i enjoy the way he talks so much, he is just so calm and chill its very nice
@@emi9643 ignore him bro, guy is being a nob. your punctuation was fine. he's just a butthurt lil twat thats going on all the comments calling people nerds
Maisteer has a couple videos exploring different techniques to get that high pitched sound. The major part is having expansion chambers (going from smaller tubes into bigger tubes creating a step) in each header tube. Definitely check them out Adam!
Also i believe the dip in power is caused by a transition of the air going from turbulent to laminar flow at certain air intake speeds. look up bernoullis principle. The variable runners probably also help with this dip.
Stepped headers are one of the largest contributors to the sound, also improves the scavenging as well. If you can do a progressively expanding exhaust on top of this it will add to both the sound and scavenging. Another factor to think about is the material you are using for the exhaust and headers. This has a massive impact on exhaust note. Materials like titanium; while overkill for your application, are one of the main reasons the f1 engines scream the way they do because it resonates at a much higher frequency. If you can find exhaust pipe made with 440C Stainless Steel (or any really hard, high tensile stainless steel), that would be your best most cost effective option when paired with stepped headers, and a progressive header-back pipe. Edit: Give 409 Stainless Steel a shot. There are already off the shelf exhaust tubing made from it!
A Maisteer stepped header experiment collab on this would've gone down in history as the most unique sounding 4 rotor ever! But would be a video series rather than an episode, as the 2 perfectionists meet lol. Also, there was a guy in NZ that made the slide throttles. Have to try find it again or Logan has experience with that too.
Absolutely love the technical videos to learn new things and just learning about the amount of engineering that goes in behind the scenes to get the best possible performance!
It would probably be easier to use an upper and lower intake manifold with an IMRC(intake manifold runner controller). You can have 2 sizes of intake runner and use butterfly valves controlled by the IMRC to swap between them. Ford 2.5L Duratech motors had a really cool system.
It's nice of you to share so much knowledge and priceless information with everyone. There's a lot to learn on this channel thanks to this amazing team, thanks.
the width of the pipe on the headers makes a massive difference to pitch, small diameter start and go stepped all the way to the end it will sound amazing!
There was a car racing at the European Hill-Climb Championship that ran a Judd V8 engine and it sounded like an F1 car (Georg Plasa BMW 134 Judd). On recent years there was a Mercedes SLK (Reto Meisel SLK340) running the same engine that's not even close to how Plasa's BMW sounded like. I was told the difference between the cars is simply the exhaust manifold. I don't know what's different, but apparently the high pitch will definitely be achieved on that specific component.
I can't be the only one that's sat here watching this kind of thing just absolutely blown away with how far you guys have come so quickly. Much impressive 🤘🏻
Would have been fun to use my recording studio frequency spectrum analyzer and special Mic to take some visual "snapshots" of the sounds/frequency's that were made in that 4-rotor header/intake before and after changes!! I watched Adams Ship Station commercial in reverse so I could see him drive around the compound without looking. 😁
I shot media at the Polecat event and hearing the 4 rotor scream through the hills is the most insane thing I've ever heard, and I had just seen the space x rocket launch before the event.
hi adam look into stepping the runners say having half the runner closer to the collector be 2” ID and the other half 2” OD, could do a larger step too but that’s an example there was this guy doing alot of digging over a few years trying to find out how a certain 2 years of f1 had a distinct howl and it came down to the runners being stepped
Rohans job on the fabrication of the headers was impressive. The fit up was perfect and the welds on the aluminum were pristine. I don't think i could have done a better job myself
I remember seeing a video which spoke about how the angle the runners merge into the collector make a big difference as well as a stepped header. That was on a v12 but I assume same principle applies.
Not just runner length, but collector type (4-2-1, 4-1, etc), material and thickness, and fuel and timing can greatly alter the "pitch and tone" of an engine.
Defined and david mazzei are definitely 2 of the most knowledgeable guys on the rotary, don't worry about the other guys who wouldn't help you got 2 of the best
It's all over the internet, I mean just google how to make exhaust sound like F1, why re-invent the wheel just look up what to do. Stepped headers, w equal length and straight pipe, is the trick btw that muffler is ruining the potential of the sound this thing could have
It's not velocity, its port resonance. Pressure waves peak and push more air into the cylinder just as the valve closes. Example is when you see fuel coming out of the intake or out of a carburetor at full throttle. The pressure waves flowing backwards cause that effect.
I know this isn’t the Ideal 4 rotor sound but as someone who has heard this car in person it has become one of my favourite sounding cars. I feel like it suits the supra’s personality. My vote is leave it as is
There are a few pictures for reference of their engine floating around with the exhaust and the intake trumpets that look vacuum actuated for length to adjust the sound and airflow. Maybe make an engine test stand for the 4 rotor and make a few designs to try it out.
within the past few days I saw a video explaining sounds of a 3 rotor and why it sounds high or low. He was looking for the low and found out that on rotories like that they have the middle header come out 2/3s the length or something like that. He said it was the same difference as the 7th threat or as he said a power cord. He said each pipe is a different note and playing with the lengths in the since of how music works can allow for the diffrence in sound. Im prob talking way over my head but this video and that related in my mind.
On a Na pp 13b rx7 improved production race car I was a part of back in the day the exhaust was made with primarys 2" @ 86" long and a 12" murge collector to 3" to make maximum hp.
STEP THE HEADERS.. Smallest diameter first than increase diameter by half of an inch every 12 inches until you have three different diameters. Will sound like a biblically accurate angel singing.
isnt that what they did in nascar as well to get that iconic sound
@justinmanse2849it is yeah! Not entirely sure if they do it anymore but I can’t see why they wouldn’t still run them.
@@2008Mclaren idk about anymore but I can say they def don’t sound like they used to lol
@justinmanse2849 I believe it stopped when they went to Gen 6 or Gen 7 “next gens”
WE NEED ADAM TO SEE THIS!
Stepped Headers and collector design!
Yohan the welder, nah yohan the artist.
Like his fab work is damn near museum worthy
*Johan
Hes the best! Hard work pays off love to see he takes pride in his work and loves his job
Couldn’t have said it better, well I could have but I want you to win the cookies.
Welding is art tho.
for f1 sound you want equal length STEPPED headers!
Ok nerd, you’re right
Was going to comment the same thing, looked into doing 8 into 1 headers and i found the stepped along the way in research
@@angeloahmeanney
Nah, for F1 sounds you gotta make it sound like a vacuumcleaner.
Driving backwards and “looking” at the camera is peak comedy, loved that!
Was just gunna comment on this, well played.
I watched Adams Ship Station commercial in reverse so I could see him drive around the compound without looking..../
A old hotrodder trick is paint the headers towards the collector and run it. Where the paint stops burning off is where you need to cut the collector, it's the optimal length.
Didn’t know that, pretty cool to know.
i looked up the frequency on the cars and also from your 4 rotor.
so what you can see from the frequency/hz is that the short intake come closed by the mazda 787b but i also see in the graphs that your car has 4 clear peaks while mad mike and the 787b only have 3 peaks.
these are guidelines the distance microphone environment can make a difference
time stamp, cars, frequency (hz)
00:47 mazda 787b 651 and 1307 and 1945hz
00:55 mad mike 540 and 1090 and 1141hz
01:07 old toyota 509 and 768 and 1022 and 1280hz
29:49 new toyota 529 and 791 and 1053 and 1317hz
10:10 dyno run short 627 and 935 and 1243 and 1556hz
Congrats Mike. Great content and looking forward to seeing this build more and eventually back on track.
Wow
@Maisteer has a video called "how F1 Sound is made" he talks about how stepped headers change the sound. I think it's a solid video, he also mentioned equal length headers and equally spaced firing order.
@divinemedia Mike you are killing it with the edits dude! I really like the editing in this video! Also love the deep dive into the 4 rotor.
I'm sure you've probably already asked James Deane, but his setup is THE 787 tone, I was almost positive he'd help you out
Did you miss the part where Adam said "they won't share with us their header design unless we bought a complete engine", James has a PPRE engine, and i'm sure that comment from Adam was pointed at them (PPRE, not James) and some others.
@@j.d.8593 kiwis do it best
Ppre has designed a engine and exhaust system that work together . They have lost of money in research and development over decades so it makes sense to protect it.
So just coping a design from a different engine builder won't achieve the same results . If he wanted a turn key package that sounds like the 787b he should have brought a package from them
the secret is stepped headers and equal length to get a high pitch sound from basically any engine
man i fricken love a nice Johan heavy video. hes such a skilled individual and i enjoy the way he talks so much, he is just so calm and chill its very nice
Punctuation lost you in turn one.
@@angeloah imagine replying to a genuine, nice comment by being rude about grammar when it really doesnt matter
@@emi9643 ignore him bro, guy is being a nob. your punctuation was fine. he's just a butthurt lil twat thats going on all the comments calling people nerds
Maisteer has a couple videos exploring different techniques to get that high pitched sound. The major part is having expansion chambers (going from smaller tubes into bigger tubes creating a step) in each header tube. Definitely check them out Adam!
Also i believe the dip in power is caused by a transition of the air going from turbulent to laminar flow at certain air intake speeds. look up bernoullis principle. The variable runners probably also help with this dip.
Nerd
Nerds are the real heroes behind cool cars
Johan is a logistical, artistic, creative, patient, methodical class act of a genius
Congrats Mike, its not easy to quit my friend!!
Stepped headers are one of the largest contributors to the sound, also improves the scavenging as well. If you can do a progressively expanding exhaust on top of this it will add to both the sound and scavenging. Another factor to think about is the material you are using for the exhaust and headers. This has a massive impact on exhaust note. Materials like titanium; while overkill for your application, are one of the main reasons the f1 engines scream the way they do because it resonates at a much higher frequency. If you can find exhaust pipe made with 440C Stainless Steel (or any really hard, high tensile stainless steel), that would be your best most cost effective option when paired with stepped headers, and a progressive header-back pipe.
Edit: Give 409 Stainless Steel a shot. There are already off the shelf exhaust tubing made from it!
F1 sounding four rotor Supra?! Hell yea, cannot wait
A Maisteer stepped header experiment collab on this would've gone down in history as the most unique sounding 4 rotor ever!
But would be a video series rather than an episode, as the 2 perfectionists meet lol.
Also, there was a guy in NZ that made the slide throttles. Have to try find it again or Logan has experience with that too.
The “LOW” at 10:31😂
read this right as he said it😭
Caught it too!😂😂😂
I watched it twice to make sure i heard it 😂
😂 same @@rxburna
21:58 I just want to see Mikes reaction when he had to edit this clip in.
27:39 Adam casually taking me back to Engineering Physics II
Absolutely love the technical videos to learn new things and just learning about the amount of engineering that goes in behind the scenes to get the best possible performance!
passed my pilot license test today ate some steak had a few drinks watching adam uploaded life is great
+1 for step headers, n\a engines are a money bag when it comes to performance and sound, but that's why we love them!
Love seeing you delve into mechanical tuning on the 4 rotor and your progress.
This video is awesome from a gear head perspective, changing the intake length and then seeing the difference on dyno is beautiful work.
It would probably be easier to use an upper and lower intake manifold with an IMRC(intake manifold runner controller). You can have 2 sizes of intake runner and use butterfly valves controlled by the IMRC to swap between them. Ford 2.5L Duratech motors had a really cool system.
It's nice of you to share so much knowledge and priceless information with everyone. There's a lot to learn on this channel thanks to this amazing team, thanks.
That drifting at the end was 🔥🔥🔥🔥
I loved the nerdy side to this vid. The 4 rota sounds amazing and the flames its spinnin is dope af. Always happy to see rotary content !!
I love watching the progression of the 4 rotor. I actually love it when you do progression videos and tweaks to make them better on all the builds.
from BMX to BIG BOI Stuff and i love every second of it. keep killin it dude.
I love the engineering side of this so much, just makes you want to constantly keep build an manufacturing badass stuff!!
Good job Mike. Video quality is insane 👌🏼
You’re right.
This video style is awesome
Correct
Keep the Johan videos coming. Just love watching him work through a problem and turn it into metal.
No matter what it sounds like, it’s an Insanely good sound, and a killer build!
I think this might be the coolest build you've had on your channel, and definitely top 10 on the internet
This video is absolutely insane. The quality and the info. 11/10 👌🏻
the width of the pipe on the headers makes a massive difference to pitch, small diameter start and go stepped all the way to the end it will sound amazing!
There was a car racing at the European Hill-Climb Championship that ran a Judd V8 engine and it sounded like an F1 car (Georg Plasa BMW 134 Judd). On recent years there was a Mercedes SLK (Reto Meisel SLK340) running the same engine that's not even close to how Plasa's BMW sounded like. I was told the difference between the cars is simply the exhaust manifold. I don't know what's different, but apparently the high pitch will definitely be achieved on that specific component.
You made it sound more like an F1 car than the 787B but I am not complaining. Sounds epic!
27:22 congratulations Mike!!! Keep it up bro. You don’t want that hanging over your head forever. I’m going to quit soon. Mark my words lol
What is that timestamp lol
@@Leeoh949Real one is at around 27:10. It's the vape remark.
The 4rotor Supra has to be my favorite of Adams. Such a sick build
I can't be the only one that's sat here watching this kind of thing just absolutely blown away with how far you guys have come so quickly. Much impressive 🤘🏻
Would have been fun to use my recording studio frequency spectrum analyzer and special Mic to take some visual "snapshots" of the sounds/frequency's that were made in that 4-rotor header/intake before and after changes!! I watched Adams Ship Station commercial in reverse so I could see him drive around the compound without looking. 😁
STEPPED HEADERS
I shot media at the Polecat event and hearing the 4 rotor scream through the hills is the most insane thing I've ever heard, and I had just seen the space x rocket launch before the event.
You need to get out more.
hi adam look into stepping the runners
say having half the runner closer to the collector be 2” ID and the other half 2” OD, could do a larger step too but that’s an example
there was this guy doing alot of digging over a few years trying to find out how a certain 2 years of f1 had a distinct howl and it came down to the runners being stepped
Must be Maisteer you're thinking about. His videos are great and Adam shoul definitely take a look at them.
@ that’s it thankyou good sir 🍻
1:28 size always matters
Only if you’re tiny.
This is a great style of video. Love the detail. It's definitely higher pitched. Not quite the scream of a 787b but on the right path.
Also FYI when trying to achieve equal length, be it intake runner's or headers use pingpong balls/ golf balls for measuring
Stepped down diameters so that the pulses reflect back against the step is what gives that sound. also a long merge can also improve the sound.
Stepped headers and equal length, you dont need anything else
Seen people achieve the f1 sound with neither tbf. Exhaust acoustics can be a bit of a black art.
CONGRATS ON NOT VAPING MIKE!!!!!!
best automotive chanell on yt,watching for years and still cant get engouhf!
i really liked the old 4 rotor supra sound for that. it sounded insane. like straight from hell insane. demonlike. i will miss it but its your car
Shout out to *Mike* man videos been so good lately 🔥🍿🔥🍿
65° and the Florida boys all in hoodies 😅 it was 9° when. I woke up this morning. Id be sweating in 65
Rohans job on the fabrication of the headers was impressive. The fit up was perfect and the welds on the aluminum were pristine. I don't think i could have done a better job myself
LETS GOOOOO!
4 Rotor vids are my Fav!
I remember seeing a video which spoke about how the angle the runners merge into the collector make a big difference as well as a stepped header. That was on a v12 but I assume same principle applies.
Not just runner length, but collector type (4-2-1, 4-1, etc), material and thickness, and fuel and timing can greatly alter the "pitch and tone" of an engine.
THANK YOU for uploading in 4K
love these technical videos!
Camera is looking crispy @divinemedia @14:00 , or maybe Johan just lookin so good these days
Honestly like the tone with the old headers the lower tone rumble sounds sweet
Defined and david mazzei are definitely 2 of the most knowledgeable guys on the rotary, don't worry about the other guys who wouldn't help you got 2 of the best
Favorite car on the channel 10/10 content Adam
We all really want to see this thing live and live long.
Ask some of the kiwi guys!! All the rotaheads here in Nz will 100% help
It's all over the internet, I mean just google how to make exhaust sound like F1, why re-invent the wheel just look up what to do. Stepped headers, w equal length and straight pipe, is the trick btw that muffler is ruining the potential of the sound this thing could have
It's not velocity, its port resonance. Pressure waves peak and push more air into the cylinder just as the valve closes. Example is when you see fuel coming out of the intake or out of a carburetor at full throttle. The pressure waves flowing backwards cause that effect.
Can’t lie. I got anxiety watching you drive backwards and talking to us. 😅
These are the killer LZ videos we have been missing! 👏
Man adam lz 2025 edits and quality is something else! Thanks mike!!
Mike you are putting out MOVIES
So much Knowledge. Love these videos
I know this isn’t the Ideal 4 rotor sound but as someone who has heard this car in person it has become one of my favourite sounding cars. I feel like it suits the supra’s personality. My vote is leave it as is
The sound is not there yet but the rest, OMG! Awesome
Love this style of video. Do more please
Whoever this new camera guy is is doing an amazing job
29:45 love the crazy backie 👌
Stepped headers. They did it in f1 too. The screaming sound we all loved in f1 was with stepped headers.
There are a few pictures for reference of their engine floating around with the exhaust and the intake trumpets that look vacuum actuated for length to adjust the sound and airflow. Maybe make an engine test stand for the 4 rotor and make a few designs to try it out.
assets.autobuzz.my/wp-content/uploads/2021/05/27131010/2021-Mazda-787B-R26B-Engine-Model-6.jpg
The production is great! Love the four rotor!
Hand down one of my favorite builds on YT. This thing is a beast 🔥
Seeing Yohan fab up a masterpiece of an intake with the e throttle linkage makes me just utterly inspired, I gotta get to work
29:43 that backie 2ft from Sean was filth
within the past few days I saw a video explaining sounds of a 3 rotor and why it sounds high or low. He was looking for the low and found out that on rotories like that they have the middle header come out 2/3s the length or something like that. He said it was the same difference as the 7th threat or as he said a power cord. He said each pipe is a different note and playing with the lengths in the since of how music works can allow for the diffrence in sound. Im prob talking way over my head but this video and that related in my mind.
You really have to give Adam credit for catching his car on fire even though he goes to great lengths to fireproof his cars.
Adam: it could catch back on fire
Also Adam: puts a blow torch to it
I love the fire out the exhaust
Ohhh, this video tickles my Mythbuster itch. Great Content!
From what I’ve read to get the high pitch scream, you’ll want to reduce the diameter of the headers. Then step the tube diameter up. So 2” to 2.25”.
On a Na pp 13b rx7 improved production race car I was a part of back in the day the exhaust was made with primarys 2" @ 86" long and a 12" murge collector to 3" to make maximum hp.
You know you have done an awesome job on a car when you can start making changes just to chase a particular exhaust note
Love the in depth vids! Please make one for the E36, I need to nerd out 😂
David is best example to make F1 sound