>>28910354
I havent heard a 4age but ITBs can sound really good for a 4 cylinder on a Miata.
https://www.youtube.com/watch?v=9ye2Fn62xDc

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>>28910354
If you just want that deep "growl" you just need an open cone short ram intake. No exhaust mods. Drive 50-80% throttle in the 3-5k rpm range and there you go. Sounds exactly the same.

>>28910667
What if I don't want to suck in all the got air and dust?

>>28910687
Nigger retard

>>28910689
I accept your concession

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>>28910354
well im no engine sound expert but id say you need to focus on induction.
My italian project car has no ITBs but an after market cone air filter. and when driving the car I do feel a hint of that initial d 4age sound.
So ITBs with less restrictive filter should be the way to go.

>>28910689
autistic reply

>>28910354
Pay eurobeat at max volume

>>28910354
Delete the intake, one time on haggard garage they had a piece of shit D15 civic with an open throttle body and it sounded like a 4AGE 20v meme engine

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>>28910664
>can sound really good for a 4 cylinder on a Miata
Video clearly unrelated

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only real way to tune exhaust sound is to have one on the engine stand and play with different mufflers and different pipes,
you might try wacky baffles or even do wild reducers or make something that even resembles a 2stroke big pipe.
that's how the wops desperately made the 351w/clevland in the pantera sound not like an american v8 even though it was a pedantic retarded thing to want to change.
however be warned it is a dead art shaping note with exhaust tubing and honestly nobody ever really figured it out to be able to make drastic note changes without just raping hp anyways.

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>>28913832
The exhaust seems pretty simple/similar so I think as long as I get a similar muffler and manage to copy the intake noises it should sound pretty close
So the main thing to figure out is how the intake makes the sounds it does

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>>28913802
I actually thought
>how bad could it really be
then I opened the video
holy shit that's one of the worst sounding cars I've ever heard

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>>28910692

>>28910354
Do you not understand how intakes work?
>he referenced a shitbox toyota a engine, so of course not
You don't need ITBs if you just want sound, riceboy

>>28910354
Actually you should give up on ever trying to make a non-motorcycle 4 cylinder sound good and then promptly kys for allowing tranime to influence your automotive purchases.

>>28910354
Unironically the cheapest way to do it is to swap in a 4A-GE. Bore and stroke have a large effect on sound, and while you can technically destroke and then bore and sleeve B6, an engine swap is much simpler.

>>28914158

>bore and sleeve the B6
That's now how Mazda engines work. You don't sleeve a Mazda block. The blocks are too strong, it's an unnecessary way to spend money.
>bore and stroke have effect on sound
It does, but it's not as influential as 4 valves per cylinder and intake manifold setup or even rod/ stroke ratio, which the 4age has a remarkably terrible low ratio for such a short stroke engine. Long rod engines sound better when revved, think F1, and even though the B6 is a short rod engine, it actually has about the same ratio than the damn 4age, with a nearly 10mm longer stroke,. (4a ratio is so bad, worst I've ever seen in such a short stroke engine)
See, the only thing the 4a has going for it, is the Yamaha head. The bottom end is all toyota tercel, thats a really bad thing for RPM, power and longevity. It has the bearings of a Mahindra tractor and the oiling system of a Model T. The block is spectacularly archaic It is truly an over rated piece of shit engine that routinely wipes bearings because it has such an inadequate bottom end. It's even more sad how certain NPCs trouble themselves to find one and recommend other people waste their time too.
Really the B6 with some moderate headwork is a better engine, period.

>>28910354
>gay avataring faggot
Thanks for reinforcing the stereotype that miata owners are retarded faggots who are into stupid shit OP.

>>28914411
>Really the B6 with some moderate headwork is a better engine, period.

The b6 doesn't have one-tenth of the cultural relevance or motorsport pedigree of the 4ag. How does that make you feel?

>>28914436
>cultural relevance or motorsport pedigree
>how does that make you feel?
Pretty good, like I won by making you default to some feefees bullshit opinion with zero technical ability to refute the truth about toyotas overrated shittiness. Thanks for asking.

PS 4age is a garbage copy of a cosworth engine btw. Lets recap, goyota had to copy a ford engine but also had to make Yamaha do it. LOL

>>28914442
It doesn't sound like it makes you feel pretty good. It sounds like you're seething that the 4ag has a far superior motorsport pedigree, parts catalog and cultural relevance.
All the b6 has going for is that the miata was voted gay car of the year, by fags for like 10 years in a row lol enjoy your fag engine.

>>28914448
>pedigree
>cultural relevance
Now you're just broken, repeating your irrelevant faggotry.

While we're at it with the one-tenth nonsense, the 4age sold about that amount vs the B6. The Mx5 and the entire B series is still way more relevant and supported than your tercel engine. Only autistic retards that don't know any better make posts like you. Keep Seething Rajesh

>>28913802
>>28913878
Fast forward to 1:42, the beginning before he actually presses the throttle is just typical miata cabin rattle

>>28914479
No, it sounds like shit throughout the entire video

>>28914479
>horrendous drivetrain noise
>gives way to the shittiest low displacement i4 sound
wow amazing how sovlfvl

>>28914531
>>28914534
> being THIS mad
kek

>>28914531
>>28914534
Fuck you and your sour grapes thread. It's a stupid premise for a thread and I tried to contribute in good faith. Toyotafags are all weeaboo tranime losers, prove me wrong.

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>>28914545
>stating a fact is being mad
Ok zoomie
>>28914548
>Fuck you and your sour grapes thread
Huh?

The vid in first reply sounds like ass. Miatas usually sound like ass.
As I (second reply) mentioned, they sound great with an intake, but not exhaust. I had an NA8 with an intake and a cobbled-together exhaust with no cat but 3 large resonators and a muffler. It was deep ang quiet until you got on the throttle. When you ramped up the throttle around 4-5k rpm it sounded exactly like [cringe]the sound of Takumi accelerating at the end of the first scene in initial D (space boy)[/cringe]. It sounded amazing, I'd post a vid but I can't even get my old hard drive to spin so I can run a recovery, I even replaced the board on it. Backup your stuff, kids.
It's really hard to make a miata with an exhaust not sound like shit. Just slap an open-cone intake on there and you have the growl.

>>28914563
I tried so many exhaust setups on that NA. I had 3.5 full exhaust systems and mix & matched parts. Got resonators welded in. High flow cat, test pipe, replace test pipe with resonator (that's the winner), I tried it all. You really have to pack on the resonators, otherwise it's bees in a can and overwhelms the soothing, deep induction noise. Also induction noise is really only there when you start getting on the throttle where most exhausts are annoying to everyone around no matter how you're driving.
Just got an NB, she's bone stock right now but sounds really nice. I'm still going to try some things.

https://youtu.be/ry2CrvfQy9M?t=72

>>28914569
The key with any exhaust is as you discovered, early silencers. A glasspack where the cat would be sounds entirely different than a glaspack in the back. A resonator is essentially just half a muffler. The more pipe that the post-muffler exhaust stream has to pass through, the less farty it sounds

>>28914411
>You don't sleeve a Mazda block. The blocks are too strong
Yeah? You see many people boring out 1.6L blocks to fit the 1.8L pistons? Retard.

>but it's not as influential as 4 valves per cylinder and intake manifold setup
This is true, but even if the heads and manifolds are set up similarly, you'll never get the same sound from an undersquare engine as from an oversquare engine.

>or even rod/ stroke ratio
This is fantasy. Sure it has a non-zero effect, everything affects sound somehow, but the valve cover and oil pan materials will have a larger effect than the rod ratio.

>>28914571
This one is considerably better than that dogshit from the second reply but it's still bad. If I had a four banger I would just keep the stock exhaust and stop pretending I can make it sound good.

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>>28914616
The one in that vid did keep the stock exhaust, just an intake. It's the best you're gonna get from a 1.8 (or 1.6 in OP's case). Removing the cat in these cars is the biggest power boost short of an engine build or forced induction (timing advance is a good one if you're mostly-stock, too), so I've gone down that route before in the name of power. I still think intake only sounds best and I fully intend to put one on my new NB but this time I have no intention of doing any exhaust mods to this one - just intake, restoration, maintenance and cooling.
>First pic of engine bay after buying it

>>28914599
>boring 1.6 blocks
Not many. Why would anyone do that? That's retarded. The BP drops in and has bigger valves. wtf
>squaredness sound
It has to do with the cylinder displacement volume vs the overall valve curtain area and cam profile. Of course, valve size is limited by bore size and thats how it ties into squaredness. What really makes the biggest difference is the piston acceleration-deceleration curve and the cam profile. The former is a direct function of the rod to stroke ratio. If you're that same anon, then consider that the 4ag and B6 coincidentally have about the same piston acceleration-deceleration curve, but the valve curtain area is much different. Cam a B6 plus intake manifold and they'll sound very similar. It'd be more like a Honda B18, undersquared, low rod ratio but big curtain area and duration. Short rod engines in general sound more raucus and all the aforementioned engines share that trait

>>28914628
>Not many. Why would anyone do that? That's retarded. The BP drops in and has bigger valves. wtf
Oh, so now we're talking about machining a custom BP crank to destroke rather than boring a B6 block and dropping in a B5 crank. Surely that must be cheaper and easier.

>What really makes the biggest difference is the piston acceleration-deceleration curve
This is obviously bullshit because there's no airflow at TDC and BDC which is where the differences in piston acceleration are at.

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>>28914634
>obviously bullshit
It's true, and it's the fundamental property that shapes the very sinusoid of the intake and exhaust pulses, before any other property like valves, ports etc modify it. It's the basal sonic character of any engine. It also fundamentally determines many other important engine characteristics, including what crank angle peak cylinder pressure occurs at and piston dwell.
Engines are really, really cool

And what do you want with your bored out B6? I don't get the hypothetical, do you just want to destroke it for the heck of it? To what avail. If it HAD to be done, custom crank in a BP would be my choice. You get bigger valves and ports

>>28914714
You should read your graph again, because it's showing exactly what I said: that the differences in acceleration mainly occur when the valves are closed.

>And what do you want with your bored out B6?
Because bore and stroke are important for engine sound and you're not going to get an engine that sounds like a 4A with an 84 or 85mm stroke.

>>28914756
>read your graph again
If you don't understand what you're looking at just fall back and go learn or ask questions. The differences are apparent in the middle of the graph, where the valves are wide open on the intake or exhaust stroke. Seriously, if you're interested in not being a midwit, just study the topic

>>28914802
When they're different:
>At BDC
>When piston velocity is near zero
>At TDC
>When piston velocity is near zero and both sets of of valves are closed
When they're the same:
>When the valves are open and piston velocity (determined by stroke and RPM, the things that have the greatest effect on sound) is highest.

>>28914622
I have a V6 and a V8 car and I only really enjoy the intake sounds in the V6 car, especially thanks to Mazda's funny variable intake system. The exhaust sounds only slightly better than an inline 4 and from what I've seen on youtube you can only make it into a fart can.