Why the Ferrari F355 sounds so good
roadandtrack.com
roadandtrack.com
Most italian/european sports cars (with the exception of Mercedes in the past 3 years because American customers) have machined their crankshafts as "flatplane" cranks. Flat-plane cranks, no matter what firing order they have, will always alternate from bank to bank. This yields optimum exhaust scavenging and thus doesn't require the more complex header primaries that have to cross over from one bank to the other. Due to their design they don't need huge counterweights, which is why they rev up so quickly. The downside is that they suffer from secondary vibrations and have lower torque.
Americans typically machine closer to if not dead-on a crossplane crank or cruciform crank. the four crank pins are positioned in two planes, offset by 90 degrees. Typically the two outer pins are perpendicular to the outer and the two end pins are in one 180-degree plane. exhaust gas scavenging isn't as efficient as with a flat-plane crank, but that sound is worth it. This design necessitates larger counterweights to achieve a proper engine balance. The result is that you don't have the secondary vibration problems associated with flat-plane cranks. But they also don't rev as fast or as high. pick crossplane when you want torque imo.
I personally understand that a euro flat-plane crank is superior in its efficiency and power for racing, but the crossplane sound just melts my cold American heart when i hear it.
Approximately 10 percent of the U.S. adult population — over 25 million Americans — experience some form of tinnitus. And an even larger percentage is suffering from hearing impairments.
Broken mufflers and loud engines mask the tinnitus sounds and finally they can relax. This is also the reason why they prefer to hang their Freeways in the air, in the middle of the city. And why their cafes are unbearably loud with the sound of refrigerators competing with the loud music.
But you have to realize America is enormous--its over 2600 miles to drive end to end. Our highway system and infrastructure isn't setup to completely replace gas or diesel with electric for long term trips. It's getting much better, but I suspect reluctance to get an electric car in the US primarily comes down to cost and range anxiety.
It additionally talks about the unusual pattern used in modern voodoo engines in the Ford Mustang (which is also mentioned in the article). The video is very similar to this article.
Re: Ford Mustang [1]
[1] https://www.pocket-lint.com/cars/news/ford/131151-ford-admit...
On the other hand, I also like the sound of two-stroke diesels.
The article also points out that GMs LT6 flat-plane V8 for the Corvette Z06 has a sound different from the F355, this apparently being deliberate design choice made by choosing which harmonics to emphasize in the exhaust system.
You say that flat-plane engines do not require the complex header primaries that have to cross over from one bank to the other, but AFAIK typical road car and truck V8s do not have such headers[1]. Would the purpose of such headers be to give a cross-plane V8 scavenging about as good as a flat-plane one, all else being equal? In that case, would the cross-plane engine lose most of its distinctive sound?
I would be interested in hearing the difference between otherwise comparable flat-plane and cross-plane V8s at the same RPM.
> You say that flat-plane engines do not require the complex header primaries that have to cross over from one bank to the other, but AFAIK typical road car and truck V8s do not have such headers[1]. Would the purpose of such headers be to give a cross-plane V8 scavenging about as good as a flat-plane one, all else being equal?
Yes, but as you point out deployments of this technique are limited due to packaging, cost, and even other performance parameters. See the GT40 “bundle of snake” headers for an example.
For a notable example of the other performance parameters, exhaust header lengths are tuned to the powerband of the engine such that shorter headers are more efficient at higher RPMs and longer headers at higher RPMs. This can even get into resonant effects as with intake runners. It’s difficult to design cross bank headers short enough to suit modern high-rpm engines, with the exception of the “hot-V”, exhaust inside intake outside, concept deployed on German V8s from BMW, Mercedes, and Porsche on the 918 (though the latter is a flatplane crank).
> In that case, would the cross-plane engine lose most of its distinctive sound?
Yes
crossplane: https://www.youtube.com/watch?v=vpswVBOC8lk
flatplane: https://www.youtube.com/watch?v=5r7X9L8_pS4
https://youtu.be/MCCYMys6aDw?t=890
(14:50 in case the time link doesn't work.)
And from the video embedded at the end of the article:
https://youtu.be/zUU0aW3yyMc?t=32
(32 seconds in.)
Meanwhile, here's the Ford GT40:
https://youtu.be/KJJ0nIbn_Ts?t=120
This is a replica GT40 with a modern Ford 5.0 Coyote V8:
https://en.wikipedia.org/wiki/Ford_Modular_engine#5.0_L_Coyo...
Now let's listen to a Porsche 917 (flat-12):
https://youtu.be/5m8JrGD_ph4?t=82
I'll take that 917 any day of the week and twice on Sunday.
Now let's listen to the ugliest sounding motor ever:
Ferrari had a 2 liter V8 in the 208s that sounded way cooler than it was.
My list would probably include the Pagani Zonda for Mercedes v12 goodness.
Also the Carrera GT and the Lexus LFA are v10 cars known for their unique wail.
Love the sound of a screaming 6 like a Honda cbx as well.
About the second one, I'll leave this one here in case someone wonders why does the pilot hit the break and throttle pedals at the same time (heel & toe): https://youtu.be/xeoLRWCNGcA
https://m.youtube.com/watch?v=tcPgE40t4dc
https://m.youtube.com/watch?v=jWmdIKXKh-g&pp=ygUJbWF0cmEgdjE...
https://m.youtube.com/watch?v=xxWJO-SZKW8&pp=ygUJbWF0cmEgdjE...
Even the contemporary Ferrari 312 and 512, which were also sounding glorious, couldn't quite match it.
Obviously a video will never provide an accurate representation and the current remaining examples have a much lower rev limit than at the time to preserve the engines.
Rob Dahms 4 rotor: https://www.youtube.com/watch?v=JOmDj9iPs5o
This 240z: https://youtu.be/9PAHenR3JgQ?t=10
Le mans hybrids that sound like world destroying alien spacecraft: https://youtube.com/shorts/HXD5Gao4F5k?feature=share and https://www.youtube.com/watch?v=FqyGJTioXnc
https://youtu.be/f-1HwvLLNEI Does a good job capturing the exhaust along with the straight-cut gears in the valvetrain and the intake noise.
On the subject of the article, I hooned an F355 around Silverstone and while it sounded good, it was dull to drive at lower speeds and the Elise spanked it for fun.
Regarding the heavy weight in the later 1990s the VFR name was applied to sport touring bikes that had V4s but not big-bang 360 cranks. My NC30 weighs less than 400lb wet and is definitely not a touring bike.
Agreed on the V-twins. I would still love to have a RVT1000 but those command too high a price when Ducati Superbikes can be had for half the price.
We didn’t see too many 400s in the UK, I think they were all unofficial imports but was a long time ago to remember.
Mate has a VTR1000 Firestorm if that’s what you meant? Outstanding bike, extremely hard to keep under 100mph, fuel tank was genuinely stupidly small. The SP1 and 2 were the superbikes IIRC and different beasts to the Firestorm, never had the pleasure of riding one of the superbikes. But yes, a Duke 998 over an SP1 I think.
These bikes were the end of an era. After the RC51 Honda went to the inline-four CBR1000RR Fireblade and never looked back.
They are from a sweet spot in history. There was adequate technology to make them reliable and high performance but inadequate technology to truly perfect suspension geometry and engine layout. The big-bang four was intended to reduce rear wheel slip by maximizing dwell time between impulses. Modern bikes can make far more power and let computers do the traction control. But the VFR400 is a carbureted fully mechanical bike. The ignition is electronic but no more complex than points. Just more reliable. It's a real joy to own, maintain, and ride. It isn't even fast, but it sure feels like it's doing something!
My NC30 is actually an EFI conversion project running Megasquirt. I got tired of trying to get to the carbs... ;-)
When I did the valve adjustment I asked for parts for some other Honda that was sold in the US. There’s only two diameters of shim so once you find a compatible model you just order parts for that. Same for oil filters and non-exotic parts. Other than that you’re calling Rick.
My carbs work perfectly and I refuse to ask or answer any further questions on the topic ;)
Thanks for the tip on thevisorshop.com.
I'm intrigued by the EFI conversion. That seems like a big project. If you want to chat more send an email to my username at the domain in my profile.
Here's two videos of how it sounds. I just had goosebumps again watching them a bit. https://www.youtube.com/watch?v=q3WdxhXlLpc https://www.youtube.com/watch?v=wY_Bca6158s
And sadly, annoying thousands of people during its trip
I almost entirely always say we should err on the side of more personal freedom, but loud motorcycles need to be completely banned.
Agree 1,000%.
I really enjoy the acceleration though (when it's safe to e.g. accelerate away from a traffic light or when getting on the freeway).
The feeling of way faster responding control, and being exposed to wind, smells, sounds makes it a very relaxing immersive experience for me.
I dream of an electric motocycle that can accelerate like hell and emit almost no noise. Just like Tron or something.
Which happened to win LeMans the very first time they tried, humiliating all the Europeans and subsequently being banned
Loud isn't the goal, the tone is. The Lexus LFA is a perfect example of this[1]. It's not extremely loud for a car of that caliber, but it's lauded as one of the best sounding cars ever made. Poorly designed exhaust (or no exhaust in the case of your broken muffler) on an otherwise great sounding engine almost always ruins the tone and makes it unbearable to listen to. Bad exhaust on a bad sounding engine is just miserable.
[1] https://www.hotcars.com/heres-why-the-lexus-lfas-screaming-v...
I wish this was actually the case in practice. There s definitely something special and musical about some ice engines, a true sensual experience.
But then in practice, people who actually value that (as in, pay money), their cars just ends up being loud and obnoxious.
So where are they, all these quiet, beautifully aurally tuned cars (emphasis on quiet)? Not everybody is driving thos3 lexusses just judging from the racket.
You won't notice them if you're not interested in cars, but there are tons of them and Lexus/Toyota are responsible for quite a few. The RC-F, IS500 and LC500 sound amazing, as did the GS-F and IS-F. Toyota also made some iconic engines such as the 2JZ-GTE in the MKIV Supra and the 2GR engine that Lotus used in the Evora.
It's the other way around: There are plenty of cars that sound beautiful unmodified, and aren't unreasonably loud, but they tend to be the most expensive cars on the market.
So people often modify their cars to sound different, but getting a refined sound that way costs a lot of money. The cheapest modifications make the car sound terrible, so you're more likely to notice the cheap poorly modified cars than anything.
At the end of the day considerate people are going to drive any car quietly in a quiet setting. Inconsiderate people will start their car up in track mode at the crack of dawn on a Sunday morning and leave it to warn up for 20 minutes, and bounce of the rev-limiter going around town.
The final mix of the car was amazing though
I never realized how much car noise bothered me until I got an EV; it's silent at speed and you hear the wind.
[0] How fast is that? Who knows; the speedometer doesn't work, along with many other things.
But when I’m driving to the kindergarten at 7am, I want silence and peace. When I’m part of the traffic going back home and you have one guy making so much noise for fun while barely moving, I wish for bad things. When you are in the mountains and you hear some middle-aged men enjoying their vibrators with wheels, I wish they would drive electric.
I think we should eventually restrict the noisy and smelly cars to racetracks and special events. Like we do for horse carriages.
I would gladly make noise in a Ferrari for a few laps in an industrial area far from people.
It's mostly sound insulation and build quality that affect it for higher end cars.
I get exhaust notes are subjective, but I've found Subaru owners are the only people who appreciate Subaru exhaust notes, and at which point it starts to feel a bit like a sunk cost thing.
Should be the other way around, each cyinder fires once every two revolutions.
He correctly divided by 2, though.
Italians know how to make cars sing. Sadly they don't much about electricity/electronics nor reliability ; )
A breakdown of the difference between the raw sounding RB and clinical JZ would be cool too. Though owning an RB I think the rawness came from the terrible factory timing optical encoders, since upgrading that to more accurate kit it sounds much closer to a JZ.
This is why a Maserati crawling along at 10 MPH sounds like it's engine has a pair of bricks inside and is about to explode.
I absolutely hate it along with other loud sounds. If you are in the middle of nowhere whatever. But I hate people driving around my suburb in their loud stupid “exotic” sports cars or bikes, it just signals you are a POS.