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Does anyone else like driving fast?

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funeralxempire
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09 Nov 2014, 2:17 pm

alex wrote:
I love driving. One of my cars has a v12 engine . 8)


Oh, what's that and how bad on gas is it? :lol:


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09 Nov 2014, 5:32 pm

I wanna hear what a v-16 engine sounds like.



funeralxempire
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09 Nov 2014, 6:08 pm

auntblabby wrote:
I wanna hear what a v-16 engine sounds like.


Since you asked so nicely...

[youtube]http://www.youtube.com/watch?v=WtPNUVaIBVs[/youtube]
Modern Cadillac V16

[youtube]http://www.youtube.com/watch?v=fZMPDCNyQxE[/youtube]
old BRM racing V16

Personally I like how inline-5s sound. Mmm, I dream of Quattro.


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auntblabby
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09 Nov 2014, 6:28 pm

to me, inline 5s [can there be any other kind? ;) ] sound rather industrial, like a chopped down version of the v-10. a 3-cylinder engine sounds similar, but smaller. the v-16, OTOH, sounds like a v-8 on steroids. it has an octave higher "harmonic" on top of the rumbly v-8 sound.



funeralxempire
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09 Nov 2014, 6:52 pm

auntblabby wrote:
to me, inline 5s [can there be any other kind? ;) ] sound rather industrial, like a chopped down version of the v-10. a 3-cylinder engine sounds similar, but smaller. the v-16, OTOH, sounds like a v-8 on steroids. it has an octave higher "harmonic" on top of the rumbly v-8 sound.


Honda's built a V5 bike engine for top-tier motorcycle racing; VW also has their VR5 engine which combines traits of Vs and straights, the cylinders are angled like a narrow angle V but there's only one head like an inline.

5s do sound industrial, but whenever I hear one I immediately get visions of fire-spitting Audi Quattros screaming down gravel roads on maximum attack. 8)


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auntblabby
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09 Nov 2014, 7:02 pm

funeralxempire wrote:
auntblabby wrote:
to me, inline 5s [can there be any other kind? ;) ] sound rather industrial, like a chopped down version of the v-10. a 3-cylinder engine sounds similar, but smaller. the v-16, OTOH, sounds like a v-8 on steroids. it has an octave higher "harmonic" on top of the rumbly v-8 sound.


Honda's built a V5 bike engine for top-tier motorcycle racing; VW also has their VR5 engine which combines traits of Vs and straights, the cylinders are angled like a narrow angle V but there's only one head like an inline. 5s do sound industrial, but whenever I hear one I immediately get visions of fire-spitting Audi Quattros screaming down gravel roads on maximum attack. 8)

how do they get balance if 2 cylinders are on one side of the V while 3 are on the other?



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09 Nov 2014, 7:19 pm

auntblabby wrote:
how do they get balance if 2 cylinders are on one side of the V while 3 are on the other?


No idea, I've never read anything regarding difficulties with engineering a means of balancing the engine. It's possible no attempt was made, NVH isn't typically a concern with racing vehicles.

With the VW VR5 balance shafts would be used, similar to other unbalanced engine designs.


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auntblabby
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09 Nov 2014, 7:32 pm

funeralxempire wrote:
auntblabby wrote:
how do they get balance if 2 cylinders are on one side of the V while 3 are on the other?


No idea, I've never read anything regarding difficulties with engineering a means of balancing the engine. It's possible no attempt was made, NVH isn't typically a concern with racing vehicles.

With the VW VR5 balance shafts would be used, similar to other unbalanced engine designs.

aside from an extra cylinder, I wonder what advantage a v5 would have over a v4?



funeralxempire
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09 Nov 2014, 7:51 pm

auntblabby wrote:
aside from an extra cylinder, I wonder what advantage a v5 would have over a v4?


At the time manufacturers were allowed to enter 4 stroke engines of up to 990cc with 3-6 cylinders.

Adding an extra cylinder increases valve space, meaning more fuel/air mixture can enter the cylinder.
It also means the each cylinder can be 20% shorter for the given displacement, reducing the distance the piston needs to travel and thereby increasing redline.

Shorter stroke means higher redline, better breathing means additional power up top.
Both factors should cause the 5 cylinder engine to produce more power than a 4 cylinder engine of similar displacement.

While a 6 cylinder engine should be the most powerful design within the limitations, it may have been more difficult to package in the required size. Engines with fewer cylinders weigh less and produce more torque and may also have superior fuel economy.


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09 Nov 2014, 7:55 pm

funeralxempire wrote:
auntblabby wrote:
aside from an extra cylinder, I wonder what advantage a v5 would have over a v4?

At the time manufacturers were allowed to enter 4 stroke engines of up to 990cc with 3-6 cylinders. Adding an extra cylinder increases valve space, meaning more fuel/air mixture can enter the cylinder. It also means the each cylinder can be 20% shorter for the given displacement, reducing the distance the piston needs to travel and thereby increasing redline. Shorter stroke means higher redline, better breathing means additional power up top. Both factors should cause the 5 cylinder engine to produce more power than a 4 cylinder engine of similar displacement. While a 6 cylinder engine should be the most powerful design within the limitations, it may have been more difficult to package in the required size. Engines with fewer cylinders weigh less and produce more torque and may also have superior fuel economy.

wow :) you know a lot about engineering. does the shorter stroke cut down on low-end torque?



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09 Nov 2014, 8:09 pm

auntblabby wrote:
wow :) you know a lot about engineering. does the shorter stroke cut down on low-end torque?


I know just enough to sound like I know what I'm talking about. :lol:

You're correct, an engine with a shorter stroke would typically produce less torque than one of the same displacement and cylinder count with a longer stroke.

The one with the shorter stroke probably can spin faster though, so it will likely produce more power than the longer stroke engine.
The longer stroke engine will be more 'driveable' and feel more 'powerful' when you're driving normally, since we don't often drive at wide-open throttle on the highway.


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09 Nov 2014, 8:24 pm

funeralxempire wrote:
The longer stroke engine will be more 'driveable' and feel more 'powerful' when you're driving normally, since we don't often drive at wide-open throttle on the highway.

so THAT's why that rabbit diesel felt gutsier driving around town than the gas version. :idea:



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09 Nov 2014, 8:46 pm

auntblabby wrote:
funeralxempire wrote:
The longer stroke engine will be more 'driveable' and feel more 'powerful' when you're driving normally, since we don't often drive at wide-open throttle on the highway.

so THAT's why that rabbit diesel felt gutsier driving around town than the gas version. :idea:


Basically.

Diesel engines tend to produce more torque than gasoline engines of similar, but less power. There's a number of factors in play that cause this, but the end result is that at low and moderate engine speeds a diesel will have more pull than a gasoline engine.

At higher engine speeds diesels are at a big disadvantage, they also tend to be heavier relative to power output compared to gasoline engines. This is why diesel race cars are rare and mostly limited to endurance racing at this time. A Seat TDI has competed in World Touring Car Championship effectively though.

Image
Audi R10 TDI diesel powered race car


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10 Nov 2014, 12:32 am

Most of the time I am cautious about driving and I need to be, due to vision impairments, sensory issues that affect my ability to focus, and anxiety.

However, I do like the sensation of driving fast.

Sometimes I get an urge to "beat the train" when I am driving parallel to a railway line, and I am aware that it is dangerous but really want to do it!! !!



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10 Nov 2014, 12:35 am

PhoenixRising wrote:
Most of the time I am cautious about driving and I need to be, due to vision impairments, sensory issues that affect my ability to focus, and anxiety. However, I do like the sensation of driving fast. Sometimes I get an urge to "beat the train" when I am driving parallel to a railway line, and I am aware that it is dangerous but really want to do it!! !!

just don't cross in front of it unless he is a mile behind you :o



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10 Nov 2014, 12:39 am

auntblabby wrote:
PhoenixRising wrote:
Most of the time I am cautious about driving and I need to be, due to vision impairments, sensory issues that affect my ability to focus, and anxiety. However, I do like the sensation of driving fast. Sometimes I get an urge to "beat the train" when I am driving parallel to a railway line, and I am aware that it is dangerous but really want to do it!! !!

just don't cross in front of it unless he is a mile behind you :o


Oh no, I would be too afraid to do that!! ! I only do it when I am on a road such as a highway where a railway line runs parallel to it, and not where I need to cross over..