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Unread 09-19-2011, 07:41 AM   #1
poppatello
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1984 CJ7 
 
Join Date: Mar 2008
Location: New Castle, DE
Posts: 819
4.0 to a Stroker Rebuild???

I've seen a couple 4.0 Renix motors and 4.2's on cragis list advertise as great stroker rebuilds. Just wondering if it can be done and about how much am I looking to do it? I would do as much work as I could but want a great job so I would assume the machine shop would install the crank and cam. Has anyone done this and liked the outcome???

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Sometimes it a good idea to pull a vacuum hose before the wife rides in it--you can tell her you need a new ____ and once you get your new ____ you can reconnect the hose. :)


84 Cj 7 w/ 4-Banger, 4.5" BDS lift, 1/2 Trans Drop, Twin Stick, 32" Tire, Front Aussie Locker, No Sound System Yet, No Armor, Warn 8274 Not Installed, Webber Carb Upgrade, Luckycheese Ing. Upgrade...
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Unread 09-19-2011, 07:56 AM   #2
JeepnBlake
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2004 TJ Wrangler 
 
Join Date: Jan 2008
Location: Lincoln Nebraska
Posts: 3,113
I was quoted 1500-1800 to do mine.

That is me bringing in my engine, the crank (needs 10mm machined off the nose), and bringing in my new pistons and cam. I would also be getting the engine hot tanked, block bored out, and reassembled to drop in.

Piston sets (KB944) are $415 + shipping right now at summit
Cams are $200+
plus you're looking at the parts that get replaced in a rebuild freeze plugs, seals, gaskets etc.

So you'll be in the $2200-2500 range when all is said and done on the conservative side.

Some folks just pull the crank and rods and throw in the 4.2 stuff, which is done pretty cheaply it seems.
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Unread 09-19-2011, 08:19 AM   #3
poppatello
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1984 CJ7 
 
Join Date: Mar 2008
Location: New Castle, DE
Posts: 819
Well I don't mind doing it the correct way if it takes a bit longer. My jeep is running now and it has the 4 banger in it so getting more inches is very appealing to me @ the moment. LOL Is the machine shop installing all those items for you for 1800 bucks? Crank, pistons, freeze plugs seals and such? Are you going with the 4.6 build specs or using your own???
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In a world full of copy cats, be an original...

Paved Roads
A Fine Example of Needless Government Spending
Quote:
Originally Posted by berserker View Post

Sometimes it a good idea to pull a vacuum hose before the wife rides in it--you can tell her you need a new ____ and once you get your new ____ you can reconnect the hose. :)


84 Cj 7 w/ 4-Banger, 4.5" BDS lift, 1/2 Trans Drop, Twin Stick, 32" Tire, Front Aussie Locker, No Sound System Yet, No Armor, Warn 8274 Not Installed, Webber Carb Upgrade, Luckycheese Ing. Upgrade...
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Unread 09-19-2011, 08:38 AM   #4
poppatello
Registered User
1984 CJ7 
 
Join Date: Mar 2008
Location: New Castle, DE
Posts: 819
Here is the specs I was eyeballing...



~ Jeep 4.2L 3.895" stroke crank
~ Jeep 4.2L 5.875" rods
~ Keith-Black Silvolite UEM-2229 +0.030" bore pistons
~ Increase piston dish volume to 30cc
8.8:1 CR
~ Crane #750501 192/204 degree camshaft
~ Ported HO 1.91"/1.50" cylinder head
~ Mill block deck 0.035"
~ Mopar Performance 0.043" head gasket
~ 0.058" quench height
~ 2.25" exhaust
~ Ford 24lb/hr injectors with stock 39psi FPR for '87-'95 engines, stock injectors with stock 49psi FPR for '96 and later engines
~ 231hp @ 4400rpm, 327lbft @ 2000rpm
__________________
In a world full of copy cats, be an original...

Paved Roads
A Fine Example of Needless Government Spending
Quote:
Originally Posted by berserker View Post

Sometimes it a good idea to pull a vacuum hose before the wife rides in it--you can tell her you need a new ____ and once you get your new ____ you can reconnect the hose. :)


84 Cj 7 w/ 4-Banger, 4.5" BDS lift, 1/2 Trans Drop, Twin Stick, 32" Tire, Front Aussie Locker, No Sound System Yet, No Armor, Warn 8274 Not Installed, Webber Carb Upgrade, Luckycheese Ing. Upgrade...
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