cj 4.0 stroker build - JeepForum.com

 
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post #1 of 7 Old 11-22-2011, 03:20 AM Thread Starter
jeepmanstancj7
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1982 CJ7 
 
Join Date: Sep 2010
Location: prince gorge
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cj 4.0 stroker build

so my baby needs a new heart and up until a few days ago i was going to do a 4.0l head swap on to a rebuild 4.2 block, but i found a 4.0 l head on a good 4.0 block (or so he says) for cheap

now for what i have been reading since then i could, in theory, take the crank from my engine throw it in that block with new 4.0 l pistons and the 258coneting rods mill down the block to get the right quench height and i would have a 4.6L stroker i could throw a 4 brl carb on and drop right in to the cj for the price of rebuilding the 258 form the ground up... right

or am i missing something

thanks

o and id appreciate no one telling me to do flue injection if i build it its getting carbed

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post #2 of 7 Old 11-22-2011, 04:58 AM
gmakra
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In theory yes your correct. Using a carb is a good idea since the FI route is a little finicky
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post #3 of 7 Old 11-22-2011, 10:38 AM
Destr0
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1994 YJ Wrangler 
 
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My brother has built a couple of these and swears by them. I have a 4.0 sitting in my garage waiting to do this, and twice I have gotten a cheap or free 258, but twice now CJ buddies have needed a cheap 258 to bring a dead rig back to life...

My project is now SBC powered so not sure if I will ever build a 4.6... Maybe.

1994 Jeep YJ off road toy
1981 CJ7 SBC 350
2005 KJ Libertyt 4x4 CRD w/ 2.5" Frankenlift DD
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post #4 of 7 Old 11-22-2011, 11:59 AM
letchcore
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Quote:
Originally Posted by jeepmanstancj7 View Post
so my baby needs a new heart and up until a few days ago i was going to do a 4.0l head swap on to a rebuild 4.2 block, but i found a 4.0 l head on a good 4.0 block (or so he says) for cheap

now for what i have been reading since then i could, in theory, take the crank from my engine throw it in that block with new 4.0 l pistons and the 258coneting rods mill down the block to get the right quench height and i would have a 4.6L stroker i could throw a 4 brl carb on and drop right in to the cj for the price of rebuilding the 258 form the ground up... right

or am i missing something

thanks

o and id appreciate no one telling me to do flue injection if i build it its getting carded
You will lose 50HP by going carb instead of FI. Not to mention all the other benifits of FI offroading but hey you seem to have it all figured out.
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post #5 of 7 Old 11-22-2011, 01:53 PM
addicted2dunes
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FI won't flood out on steep inclines, It automatically adjusts to elevation changes. I hated carbs offroad, they always seem to flood and bog down right when you need it the most.

Cameron Gunlock
1981 CJ8 -
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post #6 of 7 Old 11-22-2011, 03:29 PM Thread Starter
jeepmanstancj7
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Location: prince gorge
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im not going to have this thread turned into the your an idiot becuse u dont want FI bash fest, most people dont like carbs becuse they involve you learning how to tune them to get your rig to run right, besides i dont have rocks or trails that have hills on them we have mud and 8 months of the year losts of snow thats what i wheel in

thanks for the input tho
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post #7 of 7 Old 11-22-2011, 03:38 PM
addicted2dunes
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Because they don't know how to tune them? No, it's because the fuel flows out of the bowls down the intake, nothing to do with tuning. Geez, well then, why not do the research, I found tons of internet write-ups on building a stroker motor.

Cameron Gunlock
1981 CJ8 -
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4.0 swap , cj7 , engine rebuild , stroker

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