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Old Nov 22, 2007 | 01:01 AM
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Default 6.0l ??

hey guys i was just wondering what a 6.0L LQ4 or LQ9 block bored .30 or .40 over would be cubic inch wise? and is boring .40 too much? also im kinda new to these engines. how do you make the 408?
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Old Nov 22, 2007 | 04:44 AM
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moving to internal
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Old Nov 22, 2007 | 07:08 AM
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.03 is considered max unless you have the block tested.
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Old Nov 22, 2007 | 08:00 AM
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.30 over is the max? and how about the 408 what engine is bored to make it?
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Old Nov 22, 2007 | 08:45 AM
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anyone?? im getting ready to try to do it. and i need all the info i can get on it.
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Old Nov 22, 2007 | 10:07 AM
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I'm building a stroker right now. To find out cubes for an engine its..
Bore x Bore X stroke x .7854 x Amount of cylinders

Eg. 4.030x4.030x4.0x.7854= 51.02 x 8= 408.18CID

So im running a 6.0L board .030 and a 4" long stroke. Hope that helps a lil.
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Old Nov 22, 2007 | 10:31 AM
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Originally Posted by Coonass350
anyone?? im getting ready to try to do it. and i need all the info i can get on it.
Talk to someone at a experienced machine shop, firmilar with LSx stuff.
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Old Nov 22, 2007 | 10:56 AM
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blownz28man, what are you building? a 370? is that right?
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Old Nov 22, 2007 | 11:31 AM
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also on figuring up the cubes, what is the .7854?? what does that stand for?
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Old Nov 22, 2007 | 06:15 PM
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Not to be an ***, but this is middle school level math. Here's the basic equation for finding the volume of a cylinder.

Eq 1) area_of_circle*height*multiplier = volume_of_cylinder(s)

Where:
  • area_of_circle is the area of the piston [top] = pi(bore/2)^2
  • height is the stroke
  • multiplier is the number of cylinders

Therefore,

Eq 2) pi*(bore/2)^2*stroke*number_of_cylinders = displacement


The .7854 is a mathematical factor that accounts for using bore*bore instead of pi*(bore/2)^2.
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Old Nov 22, 2007 | 08:52 PM
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oh okay thanks. i didnt know all that until just now. never really asked. and how much more does a forged 370 weigh compared to a cast 370? i mean internals of them.
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Old Dec 11, 2007 | 05:21 PM
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?????
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Old Dec 11, 2007 | 08:17 PM
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doubt it weighs anymore.
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Old Dec 11, 2007 | 09:28 PM
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oh okay, thats what i figured, if it weighs anything more it cant be much.
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Old Dec 11, 2007 | 11:52 PM
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if the weight was diff it wouldn't be enough to notice any how unless ur going for all out racing then i would use billet but they have a tendency to stretch after a while
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Old Dec 12, 2007 | 10:00 AM
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oh okay. a friend of mine told me billet was very expensive, that true?
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