should i??? 4.2 crank and rods in the 4.0?? - Great Lakes 4x4. The largest offroad forum in the Midwest

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Old November 5th, 2005, 12:25 AM   #1
PolarYJ
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Default should i??? 4.2 crank and rods in the 4.0??

your call!
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Old November 5th, 2005, 07:16 AM   #2
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Strokers do run great than built right. Go for it!
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Old November 5th, 2005, 07:29 AM   #3
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Sounds like you will have more power then my baby small block
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Old November 5th, 2005, 04:24 PM   #4
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http://www.jeep4.0performance.4mg.com/stroker.html
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Old November 5th, 2005, 07:58 PM   #5
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I'm building mine now. I dropped everything off at the shop today to get the block, head, crank and rods machined. I'm expecting about 200HP/265f/lbs at the wheels when its done.

For added power, try to find an intake of a 99+, they are twice the volume and are good for almost 20 horse on a 4.7

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Old November 5th, 2005, 08:21 PM   #6
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i like the idea for a stroked 4.0 but i cant deside to do that or a SB, price wise
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Old November 6th, 2005, 08:17 AM   #7
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If you have to build the small bolock then a stroker will be cheaper. If you are just buying one and dropping it in, then it may not be too bad. The stroker will probably give you more torque though.
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Old November 6th, 2005, 09:21 AM   #8
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And with a stroker it all fits without a bunch of other mods. I'm hoping to do a stroker next year. Thanks for the link PavementPounder.
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Old November 7th, 2005, 07:31 AM   #9
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Yep I am in the process of a stroker for Kim's jeep as well. It is a wise decision with no mods to be done to your rig to install, other than motor mods.
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Old November 9th, 2005, 02:11 AM   #10
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Quote:
Originally Posted by Jeepinlunatic
i like the idea for a stroked 4.0 but i cant deside to do that or a SB, price wise
Stroke it Jay !!! i really dislike the idea of a small block in a jeep !
When u go to do become real good friend with somone in machining and have it bored for free !! Aw hell tear it down this weekend and ill machine it out in the next couple labs !
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Old November 10th, 2005, 12:11 AM   #11
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you don't have to bore it or really do any machining on it (unless it's damaged or out of tolerance of course). If you use the stock 4.2 crank throw and the 4.2 rods the piston actually sits lower in the cylinder (not much lower at all, but still lower). So bore wise it shouldn't be a problem. On the other hand, the older 4.2 crank might need some grinding and of course bearings. Aside from that, I think there is little machining that would need to be done.
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