Super Member
Quote:
-1Originally Posted by 34.50
Don't know about you guys but I think Ferrari have a **** exhaust note. It just sounds like a high pitched whiny engine. I like the deep growl of the AMG, now that's an exhaust note
Super Member
Quote:
The CROSS-PLANE engines are imperfectly balanced and need counterweights.
The SINGLE-PLANE engines are better balanced and do not need the extra weights and revs much more freely and has a very characteristic engine note.
The sacrifice in the single plane engines is probably durability...
It is the combustion events that is off balance; per-se.Originally Posted by shchow
I think you got it reversed.The CROSS-PLANE engines are imperfectly balanced and need counterweights.
The SINGLE-PLANE engines are better balanced and do not need the extra weights and revs much more freely and has a very characteristic engine note.
The sacrifice in the single plane engines is probably durability...
Member
Yes, it's the sequence on how the cylinders are fired.
The flat plane (single plane) crank is better balanced, and lighter without the need for counterweights, and revs more freely.
These are found in all the Ferrari engines.
They're more raucous and probably not as durable.
I was at an auto event and asked one of the engineers why M, AMG, S don't use this type of engine.
He said those buyers still expect some degree of civility, and the flat plane cranks are probably not as durable.
The flat plane (single plane) crank is better balanced, and lighter without the need for counterweights, and revs more freely.
These are found in all the Ferrari engines.
They're more raucous and probably not as durable.
I was at an auto event and asked one of the engineers why M, AMG, S don't use this type of engine.
He said those buyers still expect some degree of civility, and the flat plane cranks are probably not as durable.
Junior Member
Quote:
The flat-plane or single-plane crankshaft has crank pins at 180°. They are imperfectly balanced and thus produce vibrations unless balance shafts are used, with a counter rotating pair flanking the crankshaft to counter second order vibration transverse to the crankshaft centerline. As it does not require counterweights, the crankshaft has less mass and thus inertia, allowing higher rpm and quicker acceleration. Flat-plane V8s on road cars come from Ferrari (every V8 model they ever made, from the 1973 308 GT4, to the new 458), Lotus (the Esprit V8), TVR (the Speed Eight) and McLaren (the MP4-12C). This design is popular in racing engines, the most famous example being the Cosworth DFV.[16]
The HP per liter is a function of it's direct fuel injection, compression ratio (12.5:1) & RPM...
Originally Posted by Swoody
Not really, that intoxicating sound comes from their "flat plane crankshaft".The flat-plane or single-plane crankshaft has crank pins at 180°. They are imperfectly balanced and thus produce vibrations unless balance shafts are used, with a counter rotating pair flanking the crankshaft to counter second order vibration transverse to the crankshaft centerline. As it does not require counterweights, the crankshaft has less mass and thus inertia, allowing higher rpm and quicker acceleration. Flat-plane V8s on road cars come from Ferrari (every V8 model they ever made, from the 1973 308 GT4, to the new 458), Lotus (the Esprit V8), TVR (the Speed Eight) and McLaren (the MP4-12C). This design is popular in racing engines, the most famous example being the Cosworth DFV.[16]
The HP per liter is a function of it's direct fuel injection, compression ratio (12.5:1) & RPM...
Interesting - thanks for the info.
Super Member
Quote:
The flat plane (single plane) crank is better balanced, and lighter without the need for counterweights, and revs more freely.
These are found in all the Ferrari engines.
They're more raucous and probably not as durable.
I was at an auto event and asked one of the engineers why M, AMG, S don't use this type of engine.
He said those buyers still expect some degree of civility, and the flat plane cranks are probably not as durable.
Originally Posted by shchow
Yes, it's the sequence on how the cylinders are fired.The flat plane (single plane) crank is better balanced, and lighter without the need for counterweights, and revs more freely.
These are found in all the Ferrari engines.
They're more raucous and probably not as durable.
I was at an auto event and asked one of the engineers why M, AMG, S don't use this type of engine.
He said those buyers still expect some degree of civility, and the flat plane cranks are probably not as durable.
who expects civility? not me.
i assume Lamborghini's have this too.?
too bad you have to pay 2-300,000 dollars to have this.
Guilty
Banned
close
Sep 19, 2017
- Join DateFeb 2012
- LocationLos Angeles
- Posts:2,838
-
iTrader Positive Feedback0
-
iTrader Feedback Score(0)
- Vehicle(s) I drive'16 C63-S
-
Likes:100
-
Liked:69 Times in 58 Posts
Quote:
i assume Lamborghini's have this too.?
too bad you have to pay 2-300,000 dollars to have this.
+111Originally Posted by mainly
who expects civility? not me.i assume Lamborghini's have this too.?
too bad you have to pay 2-300,000 dollars to have this.
