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V4

 
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Old 04-12-2009, 04:33 PM
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V4

I was wondering what the advantages and disadvantages there would be in a V4 engine.
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Old 04-12-2009, 05:27 PM
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Re: V4

Out of a motorcycle?

There are no advantages.
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Old 04-12-2009, 05:32 PM
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Re: V4

I meant designed for a car.
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Old 04-12-2009, 05:38 PM
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Re: V4

There aren't many out there. The most recent I believe was the JDM Sentras of the late 90's but it was like the 60's before that that any were mass made in cars.
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Old 04-12-2009, 05:41 PM
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Re: V4

A V4 would never go into your car without some serious serious modification.

Don't even think about it. There is no positive gain from putting a v4 in your car. Except to say your the only one who did it.
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Old 04-12-2009, 05:49 PM
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Re: V4

I didn't mean in application, just theory. I assume it would be smaller and lighter, how well balanced would it be in comparison to an inline 4. There are tons of V6's and very few inline 6's, BMW being the most obvious. Does a V design as opposed to a an inline have any power advantages, either peak or curves, etc.
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Old 04-12-2009, 05:49 PM
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Re: V4

Wouldn't a V4 just take up more space if it's FWD?
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Old 04-12-2009, 06:23 PM
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Re: V4

As far as I've been able to tell, it would take up less room. That's the main reason why V6's overtook straight 6's in popularity. Apparently V style engines are also more fuel efficient and have lower emissions because they warm up faster.
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Old 04-12-2009, 07:27 PM
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Re: V4

Quote:
Originally Posted by mckillio View Post
I didn't mean in application, just theory. I assume it would be smaller and lighter, how well balanced would it be in comparison to an inline 4. There are tons of V6's and very few inline 6's, BMW being the most obvious. Does a V design as opposed to a an inline have any power advantages, either peak or curves, etc.

This ought to help understand engine balance and theory.

http://www.autozine.org/technical_sc...ne/smooth1.htm
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Old 04-13-2009, 01:44 PM
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Re: V4

Even though that article doesn't go into V4's it looks like Inline engines are more efficient and smoother with fewer power train losses, unless you have a V12. You do save weight and space with the V design though.

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Old 04-13-2009, 06:25 PM
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Re: V4

The reason nobody makes V4 engines for cars is because they're very hard to balance and get right. People who drive cars expect their cars to not be bad in the NVH stakes. (Noise, vibration, harshness) A V4 is always noisey, and vibrates badly. On a motorcycle this isn't an issue, because motorbike riders are used to being vibrated and a noisy ride.
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