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I-6 Vs. V-6

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Old 10-14-2005, 12:31 PM
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Default Re: I-6 Vs. V-6

Originally Posted by ghettoturbo
think about it...each side of a v is an inline 3...so i doubt it loads the walls any different unless the design of the specific engine has a worse rod angle...at least thats how i understand it, im sure im wrong
Originally Posted by baldur
V engines are not different than straight engines when it comes to loading the pistons...
im sorry but you're both wrong, please understand i said cylinder walls not pistons. please notice that when a V engine rotates it is moving into the cylinder wall rather than straight up or down. and on the power stroke the piston is moving down at an angle thus putting more stress on the wall rather than moving down in a straight line

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Old 10-14-2005, 12:33 PM
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Default Re: I-6 Vs. V-6

Originally Posted by stillnoturbo
v6 are better at achieving a lower center point of gravity. Hence why the new z350 has a v6 instead of an inline 6 like the rb26dett and more likely the new skyline will use a v6 type engine instead of a inline. I've seen where some Japanese tuners have used the VQ in a r34 to lower the center point even lower then you could of with the rb26dett. I know this doesn't really pertain to the tq debate but just another note to add into the debate. I like my L28 in my Z and inline engines better just being alil more easier to work on instead dealing with two heads to deal with. It may be a taller engine but ease of working with it is a big deal with me. Just one reason why I would never buy a z350 or a sube or anyother v type engine.
subaru engines are not V they're boxter or "flat" engines.

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Old 10-14-2005, 12:43 PM
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Default Re: I-6 Vs. V-6

Originally Posted by random-strike
Originally Posted by ghettoturbo
think about it...each side of a v is an inline 3...so i doubt it loads the walls any different unless the design of the specific engine has a worse rod angle...at least thats how i understand it, im sure im wrong
Originally Posted by baldur
V engines are not different than straight engines when it comes to loading the pistons...
im sorry but you're both wrong, please understand i said cylinder walls not pistons. please notice that when a V engine rotates it is moving into the cylinder wall rather than straight up or down. and on the power stroke the piston is moving down at an angle thus putting more stress on the wall rather than moving down in a straight line

Don't you realise that the rod pulls the piston into the side of the cylinder wall anyway? And with more than a hundred times more force than gravity does.
The cylinders are also not off-center.
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Old 10-14-2005, 12:52 PM
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Default Re: I-6 Vs. V-6

Originally Posted by baldur
Originally Posted by random-strike
Originally Posted by ghettoturbo
think about it...each side of a v is an inline 3...so i doubt it loads the walls any different unless the design of the specific engine has a worse rod angle...at least thats how i understand it, im sure im wrong
Originally Posted by baldur
V engines are not different than straight engines when it comes to loading the pistons...
im sorry but you're both wrong, please understand i said cylinder walls not pistons. please notice that when a V engine rotates it is moving into the cylinder wall rather than straight up or down. and on the power stroke the piston is moving down at an angle thus putting more stress on the wall rather than moving down in a straight line

Don't you realise that the rod pulls the piston into the side of the cylinder wall anyway? And with more than a hundred times more force than gravity does.
The cylinders are also not off-center.
the rot roatates on the pin. dont blieve me then. ask larry at endyn if V engines put more stress on cylinder walls rather than inline engines. MAYBE IM WRONG!
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Old 10-14-2005, 12:58 PM
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Default Re: I-6 Vs. V-6

ARRRRRRGGGGGGGGGGGHHHhHHHHHHH!!!!!
Stop writing stupid things, just stop.

You need to have the gas velocity in a certain range to manage to fill the cylinder properly, make the ports too big
and your torque will suffer. Same applies to valves and cams, go too big and your performance will suffer badly.
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Old 10-14-2005, 12:59 PM
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Default Re: I-6 Vs. V-6

The rod rotates on the pin on every engine, because if it wouldn't, the engine couldn't even turn over...
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Old 10-14-2005, 01:27 PM
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Default Re: I-6 Vs. V-6

Originally Posted by baldur
The rod rotates on the pin on every engine, because if it wouldn't, the engine couldn't even turn over...
right captain obvious, please baldur i cant explain it any further than i have with that drawing. go ask larry at endyn if V engines running high power and high rpms put more stress on cylinder walls.

i dont know anything about engines
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Old 10-14-2005, 01:33 PM
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Default Re: I-6 Vs. V-6

uhh.. the rod is what should tell you where the force is being placed inside the cylinder; on the compression stroke the angle faces one direction, on the decompression it's angled the opposite way. Simple as that. My inline 4 cyl doesn't have pistons that magically hop up and down, it does have a crank and some rods that rotate and exert force against the walls in the same way all piston engines do.

The only difference between inline and V designs would theoretically be a sort of gravitational droop for the V style since it's own weight is pushing itself into the lower cyl wall, but that's just a laymens guess as far as it really becoming a torque limiting factor.
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Old 10-14-2005, 01:36 PM
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Default Re: I-6 Vs. V-6

Originally Posted by turboj0hn
uhh.. the rod is what should tell you where the force is being placed inside the cylinder; on the compression stroke the angle faces one direction, on the decompression it's angled the opposite way. Simple as that. My inline 4 cyl doesn't have pistons that magically hop up and down, it does have a crank and some rods that rotate and exert force against the walls in the same way all piston engines do.

The only difference between inline and V designs would theoretically be a sort of gravitational droop for the V style since it's own weight is pushing itself into the lower cyl wall, but that's just a laymens guess as far as it really becoming a torque limiting factor.
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Old 10-14-2005, 01:48 PM
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Default Re: I-6 Vs. V-6

Originally Posted by random-strike
Originally Posted by baldur
Originally Posted by random-strike
Originally Posted by ghettoturbo
think about it...each side of a v is an inline 3...so i doubt it loads the walls any different unless the design of the specific engine has a worse rod angle...at least thats how i understand it, im sure im wrong
Originally Posted by baldur
V engines are not different than straight engines when it comes to loading the pistons...


im sorry but you're both wrong, please understand i said cylinder walls not pistons. please notice that when a V engine rotates it is moving into the cylinder wall rather than straight up or down. and on the power stroke the piston is moving down at an angle thus putting more stress on the wall rather than moving down in a straight line

Don't you realise that the rod pulls the piston into the side of the cylinder wall anyway? And with more than a hundred times more force than gravity does.
The cylinders are also not off-center.
the rot roatates on the pin. dont blieve me then. ask larry at endyn if V engines put more stress on cylinder walls rather than inline engines. MAYBE IM WRONG!
Johnny, your picture makes perfect sense. for those who still dont get it: think about it. an inline 6 will never see the static side load that a V does. why?


you can see that on a i6 the static gravity pushes straight down towards the crank. On a v6, its pushes the piston up against the cylinderwall.
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