What are the merits of I6 engines over V6
12-19-2006, 02:30 PM
#21
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Originally Posted by Wiu-Bimmer' post='369263' date='Dec 19 2006, 10:49 PM
So if having a V6 is not really an improvement to having an I6, why would you advertise it and put a badge about it on the rear of the car?
Now I'm glad I've gone thru this thread, since all comments make sense and before reading it I honestly believed that having an engine with a configuration in V was always better.
Now I'm glad I've gone thru this thread, since all comments make sense and before reading it I honestly believed that having an engine with a configuration in V was always better.
As already stated the 'V' configuration is a compromise to reduce the physical size of the engine.
12-19-2006, 03:17 PM
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Then you would probably end up using 1/4 of the engine as center console
12-19-2006, 03:27 PM
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Originally Posted by the_oracle' post='369223' date='Dec 19 2006, 08:52 PM
[snip]Looking at the two, you can see that the BMW engine has much more power and rev's higher. This is because of the short stroke of the V6 gives it a natural disadvantage. [snip]
12-20-2006, 12:12 AM
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12-20-2006, 12:43 AM
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Originally Posted by the-oneil' post='369402' date='Dec 20 2006, 09:12 AM
12-20-2006, 01:16 AM
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12-20-2006, 05:40 AM
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What about diesel straight six engines?
At the mechanical level, are they similar to a petrol I-6?
Do they require any changes in components to handle vibration.
I ask this because even though and inline 6 is more refined that a 4 pot or a V6, I'm guessing that a diesel inline6 is a different beast to a petrol inline6.
Can anyone informed enlighten us on this topic?
At the mechanical level, are they similar to a petrol I-6?
Do they require any changes in components to handle vibration.
I ask this because even though and inline 6 is more refined that a 4 pot or a V6, I'm guessing that a diesel inline6 is a different beast to a petrol inline6.
Can anyone informed enlighten us on this topic?
12-20-2006, 05:47 AM
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Originally Posted by Raighne' post='369463' date='Dec 20 2006, 09:40 AM
What about diesel straight six engines?
At the mechanical level, are they similar to a petrol I-6?
Do they require any changes in components to handle vibration.
I ask this because even though and inline 6 is more refined that a 4 pot or a V6, I'm guessing that a diesel inline6 is a different beast to a petrol inline6.
Can anyone informed enlighten us on this topic?
At the mechanical level, are they similar to a petrol I-6?
Do they require any changes in components to handle vibration.
I ask this because even though and inline 6 is more refined that a 4 pot or a V6, I'm guessing that a diesel inline6 is a different beast to a petrol inline6.
Can anyone informed enlighten us on this topic?
12-20-2006, 06:06 AM
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Even though engine layout is a major factor in determining levels of vibration, there will be residual vibration and harshness even in the most theoretically perfectly balanced engines. These will vary with the level of precision in the manufacturing of the engine itself as well as some other characteristics (e.g. balancing of ancillary equipment such as alternator, pumps etc.)
There is no inherent difference in the balancing of a Diesel or a petrol engine with similar cylinder layout, but as a Diesel engine is by nature more prone to vibration and noise (combustion is much quicker in Diesels, more like an explosion than a flame), generally the engine suspension and noise suppression is of a higher specification on a Diesel.
So, even though as ImolaRedM says there are no additional components (like balancer shafts) needed IN a Diesel I6 engine, there may be differences in the way the engine is installed. For example, use of liquid-filled bushes for engine mounts and engine encapsulation are generally more widespread on Diesels.
There is no inherent difference in the balancing of a Diesel or a petrol engine with similar cylinder layout, but as a Diesel engine is by nature more prone to vibration and noise (combustion is much quicker in Diesels, more like an explosion than a flame), generally the engine suspension and noise suppression is of a higher specification on a Diesel.
So, even though as ImolaRedM says there are no additional components (like balancer shafts) needed IN a Diesel I6 engine, there may be differences in the way the engine is installed. For example, use of liquid-filled bushes for engine mounts and engine encapsulation are generally more widespread on Diesels.
12-20-2006, 08:18 AM
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the diesel redline on my cummings is 3300 rpm. the balancing is second to being able to hanlde the 20:1 compression.
the 6 inline motor fires at 60degree angles and the crank shaft and firing order is enherantly smooth. the 12 are even better. v6s can be made smooth by using even fire cranks where ever jurnal is set to fire on the 60 degree cycle. this however preduces a weaker crank and more machaning. every rod jurnal is separate and not ganged together.
v8s are not smooth and thats why shake and rumble [ one of there benifits to some people]
some 4 and 6s by porsche and mitisbich[sp] use silent crands to balance the motors. their so good you cant even fill the motor run.
the 6 inline motor fires at 60degree angles and the crank shaft and firing order is enherantly smooth. the 12 are even better. v6s can be made smooth by using even fire cranks where ever jurnal is set to fire on the 60 degree cycle. this however preduces a weaker crank and more machaning. every rod jurnal is separate and not ganged together.
v8s are not smooth and thats why shake and rumble [ one of there benifits to some people]
some 4 and 6s by porsche and mitisbich[sp] use silent crands to balance the motors. their so good you cant even fill the motor run.