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Engine Bore??


danger_ranger05

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I know you can bore fourwheelers out to get way more power out of them, I was wondering if you could bore out a V6 engine. If you could, im curious about what resources i could look up. I own a machine shop so I can do alot of things, just need the know how:icon_thumby:
 


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np24

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The 4.0L OHV is a 3.952" bore with pretty thin cylinder walls.
You could probably bore it out larger, but the larger you get the shorter its life will be.
iirc, a .030 overbore is the max even though a .048 would make it an even 4.000"
I was gonna bore mine out when I rebuild it, but I decided before that I was just gonna force feed it and that an overbore would just shorten its life.
 

Beanmachine7000

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Usually boring is used to freshen up the cylinder walls, not for more power... Stroking usually is used to make more power...
 

AllanD

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a 030 overbore on a 4.0 is only good for about 3 cubic inches

How much power increase do you think you are going to get out
of 3 additional cubes on a 245cid engine?

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