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Any I4 or V6 has to have a balance shaft or other mechanism to counteract secondary dynamic imbalance. The most balanced and durable design is the I6. This is one of the reasons that BMW and road trucks both use the I6. |
Here's a complete guide to every type of engine configuration's balancing operations, from the single cylinder to the big boys:
AutoZine Technical School - Engine Quote:
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The only engine configurations I know of that don't require some sort of harmonic balancing device are the I6, O6, and the V12. Because a V12 is two balanced I6's, a V12 can have the cylinder banks at any angle and have little vibration.
The V8 usually has a harmonic balancer mounted to the front of the crankshaft. Engine balance - Wikipedia, the free encyclopedia Oh, and the V8 in my Chevy will run in either 8 or 4 cylinder modes. It currently only cuts 4 cylinders when the engine is under light load, but it could in theory be switched so that it only fires all 8 cylinders when that amount of power is needed. I posted a thread a few years ago about designing a V8 engine like in my Chevy, except that it uses the unused four cylinders as a supercharger and switches between that mode and full V8 mode. (Yes, I know, a plumbing nightmare.) |
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You smack of elitism and socialism. |
Dude, stay out of my threads if you're just gonna crap on them with politics. I said nothing of the sort. *I* don't need 500 horses either. I don't want 500 horses to go buy milk. Don't care about it. I left PARF over those types of arguments.
I like the idea of dropping 4 of the 8 cylinders when they're not needed. I think that's one of the best technological advancements in engine design in a long time. |
I need a minumium of a 300 horsepower V-8...so I can get to the pool hall faster!
I find it funny that anybody on a Porsche board would argue against performance. |
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Many modern V6s make nearly 300 HP at almost 30 MPG in a sedan. That's not too shabby. You can get similar output with a turbo 4, but not everybody likes the power delivery of a turbo motor. I'm also curious if a high output turbo 4 is cheaper than a V6, I suspect not. I don't see the V6 going anywhere. With that said, my old '93 Saab 9000 Aero had 250-ish HP with light mods, got 32 MPG on the highway, and was a blast to drive. That was 1993, sometimes I wonder how hard the automakers are really trying. |
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-Add boost to a VR6 and your next question is tires. You'll need racing slicks to handle a force-fed VR6~ |
I am about 6 months into my BMW affair, and I have to say that the I6 engine is seriously awesome. Its the first car I ever had that makes me constantly run through the rev range just to hear it.
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But normy. A VRsex isn't a v. The cylinders are staggered.
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This is why everything needs to be turbocharged with sophisticated computer engine control. Going to get groceries and wanna get 50mpg? No boost... putt around, no problem.
Getting on the highway on-ramp like I do? Crack the knob, plant the throttle, and unleash 700 horses. There's also a thing called a throttle. If you don't want a 500HP and just want fuel mileage, don't use so much right foot. I know a guy who has a newer 6L GTO, he can pull down 23-25 MPG on the highways. A small, 2.4L turbo 4 or 6 can get 30+ MPG on the highway and still make 500HP at W.O.T.... it's all about gear ratios and driving style. If everyone had to drive the same car on the entire planet, I'm convinced it would be a mildly tuned 951 for this reason. |
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In my opinion the worst sounding 4 banger is in the WRX/STI. That flat 4 sounds like poop until 5K. However it goes like stink. It is like the difference between a 951 and 928. If you modify a 951 just a little you can beat any stock 928, but it will never ever sound as good. |
Subaru flat-4's sound like ass due to the unequal header lengths, among other things.
Their flat 6's with some open, equal length headers sound damn good however. |
V6 engines are alive and well in Europe, but here they are twin-turbo diesels in cars such as Jaguars, Mercedes. The torque delivery makes a petrol V8 seem puny, it is after torque rather than power that acelarates the vehicle, and if you have a flat torque curve from say 1500 rpm that all you need. Many cars sold in Britain are 4 cylinder turbo diesels, and the driving ease afforded by creamy torque is appealing, as is the 500-700 miles between refuelling.Admittedly the engine noise is not Corvette like, but during everyday driving that would become wearing.
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At any given time, when a piston hits TDC the other 2 pistons are enroute and not countering the forces from the other piston. Unlike a Flat 4 or 6 inline 6, or V12 (2inline6'es in V) Those engines are naturally balanced by design When one cyllinder fires, there will be another one doing the opposite Inline 3, or 4 or V6 V8 V10 could never do that. And the bigger the bore, the worse it get's, hence balance shafts... Inline 3 is probably the worst case scenario for vibrations.. |
All of these posts are moot. Exit wound has decided for all of us what we need, and can have. Thank You oh Wise One. We will try to see the errors of our ways.
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So it is you that has infected your own thread with politics. This is America, you don't "need" something to have the right to buy something. Be it an assault spoon or a 500hp mustang. |
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