Is a well designed V8 smoother than rotary?
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that post = fail. Whether they mean a smoother power deliver or overall feel of the engine vibrations in the car, it's something that can basically be measured or rated, regardless of opinion. If it was really close, you could sum it up to inaccuracies, but it's not really an opinion thing.
smooth (sm)
adj. smooth·er, smooth·est
1. Having a surface free from irregularities, roughness, or projections; even. See Synonyms at level.
2. Having a fine texture: a smooth fabric.
3.
a. Free from hair, whiskers, or stubble: felt his smooth cheek after the close shave.
b. Having a short dense flat coat. Used of dogs.
4. Having an even consistency: a smooth pudding.
5. Having an even or gentle motion or movement: a smooth ride.
6. Having no obstructions or difficulties: a smooth operation.
7. Serene: a smooth temperament.
8. Bland: a smooth wine.
9. Ingratiatingly polite and agreeable.
10. Having no grossness or coarseness in dress or manner.
v. smoothed, smooth·ing, smoothes
v.tr.
1. To make (something) even, level, or unwrinkled.
2. To rid of obstructions, hindrances, or difficulties.
3. To soothe or tranquilize; make calm.
4. To make less harsh or crude; refine.
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From: Boston, MA
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As for me, it all depends on throttle control, irrespective of horsepower or RPM. The higher the horsepower, the finer the precision of throttle control should become. I think the high redline helps in granting a finer degree of throttle control, kind of like a micro-surgery movement scaler(?).
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From: Eugene, Oregon
Plus a v12 is the sexiest layout anyway. The only reason any person drives a non v12 car is because of cost. 12 is always the best for everything. No one wants a v6, or even a v8. v12 is what it's all about.
v8s should not be smooth. at least not at idle.
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The DEVIL Z it haunts me.
http://www.youtube.com/watch?v=4EwE15wZT7M
Came up to me on a fwy here in Vegas. Pure evil.
http://www.youtube.com/watch?v=4EwE15wZT7M
Came up to me on a fwy here in Vegas. Pure evil.
Last edited by AJ's Shinka; Feb 5, 2010 at 06:25 AM.
rotary courage
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From: :uoıʇɐɔoן
Neither is the RX-8. The redline on the 8 is 9k. The rev limiter on the other hand, is slightly higher. I'm not sure if it quite goes to 9500 stock though. The tach lags a bit so it's typically a couple hundred rpms lower than what it looks like. Either way, it doesn't matter since you have less power in the 9k range. You can rev to 9k+ (and it's still fun), but not very useful as far as power goes. The 8 is best shifted at 8700 rpm. The m3 has peak power at its redline (8300 rpm) and a rather flat torque curve up until that point as well. My point is, the redline means nothing. I realize the point of this discussion is smoothness, but the thing about the V8 redline is that it's most likely making significantly higher power at that redline. How many renesis engines are putting down more power than the M3? What rpm do they stop making power at?
I'm not sure what peak power has to do with this. Look around this forum and you'll find post from people admitting that they were cruising in 4th on the expressway, mistakenly thinking they were in 6th for a while before realizing their mistake. I don't think you'll ever see anyone claiming that about any V-8 engine.
rotary courage
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From: :uoıʇɐɔoן
I'm not sure what the point of that post is. That's just as much about gearing as it is about rpms. If we're still talking smoothness, I'd imagine there is a V8 that is just as smooth as a rotary throughout the rpm range. The point still stands, the redline means nothing without an equal amount of power when compared to another car. If 2 cars have the exact same power curve over different rpm ranges, then yes, the car with a higher redline will be faster.
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From: Asheboro, NC
i guess theres some people out there that want a quiet, "smooth" V8 out there lol
Smoking turbo yay
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From: BC, Canada
00
11 years too late. Not quite the record here, but it's getting up there.
But since we are here... V8's could be smooth if that's your goal. See the below Lexus commercial:
As for American V8's, usually, they are in vehicles like trucks and pony cars where the vibration either doesn't matter too much or could actually add to the character of the car. The LT1 in my Camaro now is far from smooth, but it's more or less supposed to be that way. I think OHV V8 will also be a bit harsher than DOHC V8 by nature since the moving masses tend to be heavier(pushrod, bigger valves vs. bucket/rocker, smaller valves).
Then there is the flat-plant crank V8... Those will shake more but rev higher.
So yeah, it depends on if you want it to be smooth or not.
But since we are here... V8's could be smooth if that's your goal. See the below Lexus commercial:
As for American V8's, usually, they are in vehicles like trucks and pony cars where the vibration either doesn't matter too much or could actually add to the character of the car. The LT1 in my Camaro now is far from smooth, but it's more or less supposed to be that way. I think OHV V8 will also be a bit harsher than DOHC V8 by nature since the moving masses tend to be heavier(pushrod, bigger valves vs. bucket/rocker, smaller valves).
Then there is the flat-plant crank V8... Those will shake more but rev higher.
So yeah, it depends on if you want it to be smooth or not.
Last edited by UnknownJinX; Oct 6, 2021 at 12:08 AM.
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