Split Nail WJ Build Thread - Page 55 - JeepForum.com
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post #811 of 2220 Old 02-13-2011, 07:38 PM
tsconver
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Quote:
Originally Posted by snobrdrkid07 View Post
Ah did not know that there was less space between each cylinder. Something that I did not know.
allpar is a great source, they claim the limit is around 330 inches compared to the standard 273 inches. but you would probably need a perfect block to do that.


Speak softly and carry a big stick.

We have room but for one flag, the American flag . . . We have room but for one language, and that is the English language . . . And we have room for but one sole loyalty...and that is a loyalty to the American people. T. Roosevelt 1919

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http://www.zrxoa.org/

2006 Red Liberty
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post #812 of 2220 Old 02-13-2011, 09:16 PM Thread Starter
SplitNail
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So what you are saying is that you can't bore very much?

1999 WJ 4.7L V8, 242 TC, Front Aussie Locker, 4 Inch RC X-Series lift, 17x8 w/ 4.5BS Black Rock Vipers, 285/70/R17 BFG KM2's, All AMSOIL Synthetic Fluids

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post #813 of 2220 Old 02-14-2011, 05:42 AM
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The difference is 0.934 liters...

~ 04 WJ Overland 4.7 HO | Graphite Metallic | Quadra-Drive | Vari-Locks | Bilstein 4600ís | ADDCO Sway Bar | Powerstick Exhaust | RB1 | SuperChips Tuned | Much More to Come ~

~ 04 WJ Laredo 4.0 | Selec-Trac | MBP | OME HD 3" Lift | JKS TB | IRO Front LCA's and UCA's| Bilstein 5100's | Silent Armor 245/70/17's | Custom Front D.S. | Stillen Rotors/Pads | Tow Package w/ 3.73's | Moog HD Steering | Kenwood eXcelon HU | Alpine Speakers, Amps, and Subs | Bilstein SS | Auxiliary Transmission Cooler | Rock Lights | Light Bars | Lots of Cool Stuff ~

~ 05 Rubicon Unlimited 4.0 | 6-Speed | Dana 44's | Air Lockers | 4.11 Gears | Rock-Trac 241OR T-Case with 4:1 4-Low | OME HD Springs | Bilstein 5100ís | 245/75/16 Kevlar MT/R's on Moabs | Hansen Offroad Steel F/R Bumpers | Warn 9000xi Winch | Edge Performance Chip | Custom CAI | Hella Off-road Lights | Cobra 29 CB | Flash Lights | Recovery Gear | Fire Extinguisher ~

~ Snobrdrkid07's ~ Overland Build Thread ~ Blue WJ "Build" Thread ~ Jeep Videos ~ Fuelly ~WJ 4.0 Trans Aux Cooler Info ~



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post #814 of 2220 Old 02-14-2011, 07:21 AM Thread Starter
SplitNail
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Quote:
Originally Posted by snobrdrkid07
The difference is 0.934 liters...
Hmmm just what I thought. Not much.

1999 WJ 4.7L V8, 242 TC, Front Aussie Locker, 4 Inch RC X-Series lift, 17x8 w/ 4.5BS Black Rock Vipers, 285/70/R17 BFG KM2's, All AMSOIL Synthetic Fluids

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post #815 of 2220 Old 02-14-2011, 08:59 AM
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Quote:
Originally Posted by SplitNail View Post
So what you are saying is that you can't bore very much?
Quote:
Originally Posted by snobrdrkid07 View Post
The difference is 0.934 liters...
Quote:
Originally Posted by SplitNail View Post
Hmmm just what I thought. Not much.
standard bore is 3.660 inches, you can get 3.701 in pistons for it. So that is 40 thou over. Would not have much material left between the cylinders though and I bet the water jackets would be pretty thin. Probably would take a perfect block to go that big.

Speak softly and carry a big stick.

We have room but for one flag, the American flag . . . We have room but for one language, and that is the English language . . . And we have room for but one sole loyalty...and that is a loyalty to the American people. T. Roosevelt 1919

2003 Grand Cherokee 4.0L Laredo

My Build Thread

A few goodies
http://s257.photobucket.com/albums/h...umb55839/jeep/

2001 Kawasaki 1200 ZRX
A few Speed parts, fun to ride
http://www.zrxoa.org/

2006 Red Liberty
Wife's ride, pretty stock
http://i257.photobucket.com/albums/h...mage0008-1.jpg

http://www.cnc4x4.org/

http://www.treadlightly.org/

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post #816 of 2220 Old 02-14-2011, 09:31 AM Thread Starter
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Quote:
Originally Posted by tsconver

standard bore is 3.660 inches, you can get 3.701 in pistons for it. So that is 40 thou over. Would not have much material left between the cylinders though and I bet the water jackets would be pretty thin. Probably would take a perfect block to go that big.
Can I get any stroke out if it?

1999 WJ 4.7L V8, 242 TC, Front Aussie Locker, 4 Inch RC X-Series lift, 17x8 w/ 4.5BS Black Rock Vipers, 285/70/R17 BFG KM2's, All AMSOIL Synthetic Fluids

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post #817 of 2220 Old 02-14-2011, 09:54 AM
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Quote:
Originally Posted by SplitNail View Post
Can I get any stroke out if it?
no clue, i just googled summit and looked at what they had in pistons, not sure about cranks, they have none for the 4.7

Speak softly and carry a big stick.

We have room but for one flag, the American flag . . . We have room but for one language, and that is the English language . . . And we have room for but one sole loyalty...and that is a loyalty to the American people. T. Roosevelt 1919

2003 Grand Cherokee 4.0L Laredo

My Build Thread

A few goodies
http://s257.photobucket.com/albums/h...umb55839/jeep/

2001 Kawasaki 1200 ZRX
A few Speed parts, fun to ride
http://www.zrxoa.org/

2006 Red Liberty
Wife's ride, pretty stock
http://i257.photobucket.com/albums/h...mage0008-1.jpg

http://www.cnc4x4.org/

http://www.treadlightly.org/

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post #818 of 2220 Old 02-14-2011, 10:01 AM Thread Starter
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Wouldn't I be losing power if my piston rings were bad due to low compression?

1999 WJ 4.7L V8, 242 TC, Front Aussie Locker, 4 Inch RC X-Series lift, 17x8 w/ 4.5BS Black Rock Vipers, 285/70/R17 BFG KM2's, All AMSOIL Synthetic Fluids

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post #819 of 2220 Old 02-14-2011, 10:30 AM
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If your piston rings were bad, and oil was getting in the combustion chamber, yes you would be loosing power.

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post #820 of 2220 Old 02-14-2011, 10:35 AM Thread Starter
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Quote:
Originally Posted by 1stblack97ZJ
If your piston rings were bad, and oil was getting in the combustion chamber, yes you would be loosing power.
That's what I thought.. If the rings are bad does that mean complete engine rebuild?

1999 WJ 4.7L V8, 242 TC, Front Aussie Locker, 4 Inch RC X-Series lift, 17x8 w/ 4.5BS Black Rock Vipers, 285/70/R17 BFG KM2's, All AMSOIL Synthetic Fluids

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post #821 of 2220 Old 02-14-2011, 11:53 AM
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No, but If you are going to go through all the trouble, you might as well rebuild it so you can have the bore size checked etc, because you might get the same issue again if your cylinders aren't round.

Lets just say that if my piston rings needed replacing, I would just go ahead and rebuild the engine.

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post #822 of 2220 Old 02-14-2011, 12:08 PM Thread Starter
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Quote:
Originally Posted by 1stblack97ZJ
No, but If you are going to go through all the trouble, you might as well rebuild it so you can have the bore size checked etc, because you might get the same issue again if your cylinders aren't round.

Lets just say that if my piston rings needed replacing, I would just go ahead and rebuild the engine.
Yea, I would most likely do the same. Would I need new pistons? Just rings, main bearings, rid bearings, and have the block true'd. Right? I'm just thinking out loud.

1999 WJ 4.7L V8, 242 TC, Front Aussie Locker, 4 Inch RC X-Series lift, 17x8 w/ 4.5BS Black Rock Vipers, 285/70/R17 BFG KM2's, All AMSOIL Synthetic Fluids

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post #823 of 2220 Old 02-14-2011, 12:18 PM
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You wouldn't need new pistons unless you have the cylinders bored, then you would want to get oversized pistons to match the bore.

You would also need cam bearings, possibly a new camshaft, and some other stuff depending on what kind of condition the motor is in.

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post #824 of 2220 Old 02-14-2011, 12:33 PM Thread Starter
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Quote:
Originally Posted by 1stblack97ZJ
You wouldn't need new pistons unless you have the cylinders bored, then you would want to get oversized pistons to match the bore.

You would also need cam bearings, possibly a new camshaft, and some other stuff depending on what kind of condition the motor is in.
Okay sweet deal. Thanks for all the info. What is a good compression reading on the 4.7l?

1999 WJ 4.7L V8, 242 TC, Front Aussie Locker, 4 Inch RC X-Series lift, 17x8 w/ 4.5BS Black Rock Vipers, 285/70/R17 BFG KM2's, All AMSOIL Synthetic Fluids

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post #825 of 2220 Old 02-14-2011, 12:37 PM
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Quote:
Originally Posted by 1stblack97ZJ View Post
You wouldn't need new pistons unless you have the cylinders bored, then you would want to get oversized pistons to match the bore.

You would also need cam bearings, possibly a new camshaft, and some other stuff depending on what kind of condition the motor is in.
th 4.7 is an overhead cam motor so I doubt he will need new cams and bearings.

Speak softly and carry a big stick.

We have room but for one flag, the American flag . . . We have room but for one language, and that is the English language . . . And we have room for but one sole loyalty...and that is a loyalty to the American people. T. Roosevelt 1919

2003 Grand Cherokee 4.0L Laredo

My Build Thread

A few goodies
http://s257.photobucket.com/albums/h...umb55839/jeep/

2001 Kawasaki 1200 ZRX
A few Speed parts, fun to ride
http://www.zrxoa.org/

2006 Red Liberty
Wife's ride, pretty stock
http://i257.photobucket.com/albums/h...mage0008-1.jpg

http://www.cnc4x4.org/

http://www.treadlightly.org/

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