Reminds me of the distinct sound of itbs

Hey, if you need a 6-cylinder with similar rpm that's a 6-to-1 to compare with, this is the old Formula Renault 3.5 V6 (Yes, there was a V6 version, it wasn't always a V8): kzbin.info/www/bejne/h5TLhWaYhs-appI From what it sounds like you're definitely on the right track with stepping the pipes. The car's taking a very similar note to a Formula Machine with the same cylinder/rpm. Also that V16 Peugeot is also a 16-to-1. What makes this crazy is the fact that Formula 1 V8s were 8-to-2, with the high pitch obviously coming from the high 18k-19k rpm. That's why Hillclimb F3000s with a 8-to-1 (You can easily tell the apart from the other 8-to-2 F3000s) could sound similar since they double the frequency from their 9k rpm motor by collecting all the waves into one pipe rather than two. The Peugeot V16 on the other hand can achieve twice the frequency of both the 8-to-2 F1 V8 and the 8-to-1 F3000 V8 at the same rpm as the F3000 cars, and would sound similar at half rpm. That's why it gains that high RC Car-esque whine because the frequency is equivalent to a Formula 1 V8 at 36-38k rpm (Twice the frequency for half the rpm. Genuinely Absurd when you put the mathematics behind it). That also means if it revved to 18k like an F1 engine, it'd sound like an 8-to-2 V8 at 72k rpm, and god forbid what cacophony that would create XD

"No Officer, it's stock. Actually, it weighs a little more than stock". As a former audio technician and a hifi/loudspeaker enthusiast, I was going to commit the sin of commenting before watching with a big spiel about how it sounds better because the density of the material greatly reduces internal resonances along the length of the exhaust tract, which means that more of the energy in the exhaust gas is being contributed to the exhaust note instead of being wasted as heat, and the tone is much more dependent on path length/shape rather than resonance tuning... but you very neatly summed that up in the first minute. Cool video!

Underrated video!!!

It needs a muffler bearing.

can you tell us about v4 cars to make great sound

*concrete exhaust on subaru please.

3:59 Rest In Peace Georg PLASA…… We miss you…

I love your Videos man!

I see your videos, I press like 🥹

Is it possible to get this or similar sound with a turbo? Perhaps stepped header, and then the turbocharger?

I lowkey love the rally car sounding like an RC motor

Most underrated channel on YT. Thank you for discovering the holy grail of exhaust sound.

In 2025 there is going to be a wave of Honda drivers ripping around with concrete exhaust mods now.

They make it sound like a rotary 😆

i used to run an 88 integra RS with a 4 inch flex pipe for exhaust from the downpipe back. pushed it past redline in every gear except 5th, and i got to redline in 5th twice.

5:58 this by far is one of the best demonstrations I’ve seen on the internet in a while

Never thought I’d see a concrete exhaust on a vehicle, but here we are.

this feels similar to someone playing around with oscillators until the right combination of things makes it sound good. shape, resonance, ...

Very creative content. Even that shop set up is interesting as heck. Never seen garage doors like those. Seems like the kind of place you wish you could go, hang out and design and develop crazy stuff.

Steps are making the pipe to a wider diameter?

That is some concrete Stience!

Your channel is filled with gold nuggets!

This video is exhausting

What happens when a music guy and a car guy gets talking

I think an eight into four into two into one would sound crazy!

I'm impressed by your dedication to solving this physics problem. Or is it a musical problem? I think you're very close to finding the solution.

HEADER BE LIKE CRACK THIS IS HEAVY.

this is epically stupid . Love it

concrete glasspack

No windshields were harmed during the process of filming this video.

Now that the comments have been removed, people might actually be able to find my answer to the most common question asked before. The engine I've used is a Suzuki GSXR 600 K4. It revs to over 15,000 rpm - so it's far from a normal 4-cylinder. It has equal length headers with a total primary length of 960mm, measured from the copper exhaust gasket in the head to the beginning of the collector. The collector is a 4-into-1 collector merging at a 22° angle. The primaries are stepped up at 460mm from 35mm (i.d.) to 38.5mm (i.d.). After the collector, there is a short section of straight pipe (~50mm in diameter) added, which has one closed off pipe tee'd off of it (that was for another test). The tailpipe is a 50cm conical section opening up from ~50mm to around ~90mm. I've tried the same exhaust setup without steps as well. I've kept the lengths and collector angles the same. That resonance was not there - the motor sounded "flat" compared to the stepped version. The megaphone enhanced the effect (but it doesn't create it - see my concrete exhaust experiments at maisteer.com ). Keep in mind that the engine had no real load applied, so the pressure waves leaving the engine are not very strong either. The effect would be much more pronounced when the motor is actually under load.

Note: Comments were removed. The flood of spam comments, opinions, and constant sharing of already-disproven 'fantasy facts' in the past had made it almost impossible to find information that was actually useful and true. The attempt to seriously answer questions in the comment section has failed. But worse, it steals my focus from what is actually important - continuing the Research. I make mistakes and I continue to make them - and this might be just another one, but that's how learning works. Thanks to everyone who has provided valuable input in the past and has helped along the journey.

very good content, shout out from brazil ❤

Thats Max Heidrich's car in the background!

talk about heavy duty exhaust.

Olmecs exhaust

How is this channel not bigger the effort going into making a nice sounding exhaust is class

I have been waiting so long for an upload and hollly mollly Im happy he did.

Glad someone like you exist on KZbin

Very impressive research. One my viewers put me on to your channel and it gives me insight into why my Ferrari engine doesn't sound like a Ferrari.

Why not create overtones by tapping the crank sensor signal, multiplying it electronically, and feeding this signal into an audio amplifier with a speaker driver attached to the muffler?

we now know how BeamNG sounds are sampled

I wonder how a nascar X style exhaust pipe would sound on the BMW or the Mercedes 12. Thecraig909's Ford F100 truck sounds awesome with a Custom NASCAR Exhaust

If you remove comments like on the other vids, you will only hurt your channel in the long run. You can never get rid of idiots, you need to learn to ignore them. Besides that I really like the videos, I’m looking forward to more of them!

Dude is hilarious.

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