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08-14-2003, 02:56 PM | #1 | |
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Exhaust note
Alright, I'm well aware that the note of the exhaust is dependent on the bore of the engine, hence civics sounding like weed whackers and V8's sounding like thunder... However, how is it that a Ferrari (F50, 355, or any Ferrari whether it be an 8, 10 or 12 cylinder) create that high pitch sports bike type exhaust note with engine bore's as big as 6.0L ? Take a LS1 engine, thats a 5.7L but it sounds NOTHING like a Ferrari, yet the bore is almost the same, so what is it? Does Ferrari use some special sort of exhaust? Blah...?!!!
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08-15-2003, 02:35 PM | #2 | |
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Don't know really, but a Viper GTS sounds only a little deeper than a Honda with a fart can. Newer Ferrari's are generally quiet unless a sport exhaust like a Tubi system is installed.
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08-15-2003, 06:40 PM | #3 | |
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LS1 is a 5.7 V8 right? thats 712cc displacement per cylinder
A Modena's V8 only displaces 3.6 litres, so thats 450cc/cyl Enzo -> 6l V12, 500cc/cyl the ferrari engines are more revvy and "zingy" than the lazy V8 which is why we get that beautiful sound.. someone correct me if im wrong, but i think thats more or less it |
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08-16-2003, 09:54 AM | #4 | |||
Pretty much amazing
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I think you're right, I was going to say the same thing. All of Ferrari's motors are of small bore and overall displacement, and I think this lowered amount of rotationg internal mass allows them to rev so quick and at such high rpm.
Thier size could also be a link to the sound they make, you hear plenty of Civics and teg's w/ Coffee cans, but never a 3.6L V-8, or a 5.7 12, it's bliss when you do though.
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08-16-2003, 03:59 PM | #5 | |
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Don't forget the flat crank.... It's like two fours slightly out of phase...
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08-17-2003, 12:42 AM | #6 | |||
Pretty much amazing
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Flat Crank? I've never heard about this, elaborate please.
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08-17-2003, 03:40 PM | #7 | |
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Each "throw" on the crank has two rods on it, one for each bank of four cyl. Most american V8s have a throw every 90 degrees with only one rod on it.
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10-14-2003, 09:27 PM | #8 | |
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The sweetest sounds I ever heard
Exhaust system designs have a mojor role in how the sound comes out the back.
Your typical Shit-kikker (Cow-Boy), cattle trailer-pulling truck makes that loud popping noise. Having dual exhaust with Cherry-Bombs and no crossover pipe gives it that terrible "POP!!!" that they like. A good dual system with Flow Masters and a crossover tube has a brute, roughness without the pop. My 400c.i.d. Chevy has 3" pipes behind the collectors that run into a single 4" muffler, it has a rumble that shakes the glass in the car next to it. The duals-into-single arrangement really smoothe it out. You don't hear the single pulses of each cylinder but a mellower tone of a constant flow. Go to http://www.bartonekdragracing.com click on "cool rides" to the left of the opening page and go to Gene Mosmeyer's blown Biscayne for a video. A V-8 fires every 90 degrees of rotation, that's every 1/4 crank revolution, 4 power pulses per revo. The typical 60 degree V-12 fires 6 times per revolution, that's 50% more exhaust pulses for the same revo. The more cylinders that fire, the smoother the flow out the collector, which gives it more "zingyness". Lightness of the clutch and flywheel make it more snappy too. I rode a Honda C.B.X. in high school, if you have ever heard one, you will always remember it. There was no comparison to a regular 4-cylinder bike, the 6-cylinder CBX sounded like a Ferrarri coming up the street. The main concern on my V-12 project was the lightness of the rotating mass. The flywheel and clutch will be minimal to give it that quick, snappy sound. Ever since I heard a 333SP, I had to have a V-12. It's not a Ferrari, but the closest thing I could find to one (a junk Jag was out of the question). As far as a 180 degree V-8 crank, it does what it says. It fires every 180 deg. Since there are 8 cylinders, on every power stroke there are 2 cylinders that fire at the same time (I think). It makes for great torque. Next time you watch an I.R.L. (CHAMP Car, or whatever they call it now) race, listen closely to the roughness in those engines. I think they have 180 degree cranks. They turn like 10k r.p.m. but don't sound like it. The sweetest sound for me has to be the 333SP, F-50, and the McLaren F-1. ---Scratch that, Schumacher's F-1 Ferrari--- ---TEX--- |
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10-15-2003, 03:46 AM | #9 | |
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Re: The sweetest sounds I ever heard
Thanks for clearing that up
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11-11-2003, 01:31 AM | #10 | |
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heheh
Also the 4 cams is hard to match
my car sound pretty close to a 308 |
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