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TJ, YJ & LJ Drop Down Tail Gate Conversion KitGreat prices on seating!--Oconee Off-RoadTJ 5.25" Speaker Adapters - NalinMFG

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Unread 01-11-2012, 10:10 PM   #16
youngjeepr
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Im just finishing up my v8 swap its a 350/th400/231.. I did hold the engine forward just a bit so my rear driveline wasn't 6" but other than that it was extremely easy. I bought the motor mounts trans/transfer case adapter and my radiator from novak. I wouldnt buy there radiator again but the mounts and adapters are very well made.


I say go for the v8

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Unread 01-11-2012, 11:03 PM   #17
444
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You can try pm'ing stoveguy01 but he said he swapped in a 5.2/4-sp auto from a 94 grand cherokee into his yj and his cj. Those transmissions will mate to your transfer case so you don't need to buy any pricey adapters.
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Unread 01-12-2012, 08:00 AM   #18
CaptainCaveman
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Quote:
Originally Posted by scifone View Post
If you want overdrive you should look into a AW4 swap out of a cherokee.
I've looked into that. But what concerns me is it's reputation. Although I know it can be built better, just like all Chrysler transmissions.

Quote:
Originally Posted by DirtyYj91 View Post
First thing I have to say is that you Stole that jeep at $700. My first one was an 83 Cj that had not a floor left in it and I gave $800 for it 'cause the frame was solid and it ran.
I have a '91 Yj now with the Auto (TF999) but with the 4.0L, and with having the Cj with the 100k plus mileage 258 and to having the comparable mileage 4.0L I would go with the 4.0L as the simplest swap.
My best friends 88 Yj threw a rod in his 258 that was also rode hard and he swapped in a 4.0L HO long block out of a Zj or Grand Cherokee and it was night and day with power and fuel mileage although we kept the Motorcraft Carb and the stock intake ( this took two people to get the ports and bolts all lined up but it sealed.)



So for an ending I would say if you have the Money to sink into an expensive machine shop rebuild of boring and decking the engine, probably around $1000, then by all means have a newer engine. I don't think the overdrive trans like AW4 work as an easy swap because they are too long for the WB. But a Junkyard lowest mileage 4.0L high output for $400 is very doable in a day.
THANKS!!! The way I figure it, it's a good solid, running, bone stock, jeep that needs some TLC. And for what we paid for it, I can justify sinking $2000-3000 into it to get it where we want it.

Still kicking the engine options around. What I'd love to do is convert it to diesel, but we'll see.

Quote:
Originally Posted by youngjeepr View Post
Im just finishing up my v8 swap its a 350/th400/231.. I did hold the engine forward just a bit so my rear driveline wasn't 6" but other than that it was extremely easy. I bought the motor mounts trans/transfer case adapter and my radiator from novak. I wouldnt buy there radiator again but the mounts and adapters are very well made.


I say go for the v8
How for forward did you move it? And why wouldn't you use the Novak radiator again? And did you do the SYE? Thanks!

Quote:
Originally Posted by 444 View Post
You can try pm'ing stoveguy01 but he said he swapped in a 5.2/4-sp auto from a 94 grand cherokee into his yj and his cj. Those transmissions will mate to your transfer case so you don't need to buy any pricey adapters.
Kind of going away from the computer controls. I want to go back old school. K.I.S.S.
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Unread 01-12-2012, 08:55 AM   #19
youngjeepr
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I moved it about 5" forward. You could set it all the way back but I didnt want my driveline to short because of driveline angles. I wouldn't use the Novak radiator because the way they designed the mounting brackets the first problem I had was the brackets sat about 2" to low and hit my steering shaft making it so I coudnt turn. After I fixed that the radiator keeps sliding down inside the mounts so far that it hits my steering shaft. This is just because the engine vibrations driving around town. I'm SOA so I already had the SYE.
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Unread 03-25-2012, 05:10 PM   #20
CaptainCaveman
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Been too long since my last post. So here's an update.

So far I've installed new LED tail lights, LED dash lights for the tach (the rest will be in the near future), and the big project; a header. The stock manifold cracked, and not wanting to go through that again, just went all in and put a Pacesetter on it. I know, not the best, but considering at some point in the future (hopefully near) it will be getting a SBC.

So here's some pics. The wife even got into the fun and got her hands dirty
2012-03-18_09-21-43_281.jpg   2012-03-18_09-21-56_6.jpg   2012-03-18_09-35-49_515.jpg   2012-03-18_09-52-20_845.jpg   2012-03-18_10-54-11_986.jpg  

2012-03-18_11-00-12_179.jpg   2012-03-18_11-00-33_69.jpg   2012-03-18_12-25-18_112.jpg   2012-03-18_14-24-16_188.jpg   2012-03-18_11-00-49_519.jpg  

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Unread 03-25-2012, 06:16 PM   #21
superj
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man, thats great that your wife will help out once in a while. that makes it mean more.


nice looking header and great looking jeep.


on my original post, i have since checked out the trans and engines and the 302 will not bolt to the tf999 trans so sorry on that bit of misleading posting. but, i would do the 302 or 350 swap too, as a matter of fact, i am. i got a deal on a 302, c6, and whatever the stock t-case is for a bronco and its going in. right now, my 4.5, tf999, and np207 are ok but not the power i want.
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Unread 03-26-2012, 08:46 AM   #22
CaptainCaveman
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As she says, she want's to learn about her jeep. Definitely not a girly-girl.
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Unread 03-27-2012, 09:20 AM   #23
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One more thing I did...

As so often happens, Mr. Murphy reared his ugly head and said "you just THINK your done today". After we finished buttoning up everything and went to crank it over, it just wouldn't start. OK, process of elimination time. Got spark, but no fuel. Couldn't even get it to prime. So now it has a new electric fuel pump and it's running just fine.
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Unread 07-22-2013, 11:37 AM   #24
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UPDATE...


Been quite a while since my last post. Just been drivin this thing until about a month ago. The engine is just too tired. Poor thing. So now the swap begins. We've decided on a diesel for the power plant. So over the weekend I scored an '84 3/4 ton Suburban for $900 running. It has the stock 6.2 (Detroit Diesel)/700R4/208C.

Originally I was thinking of sourcing a 231C and do the jeevy franken case. But I'm starting to think of a 208J instead. What does the brain trust think?
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Unread 07-23-2013, 06:42 AM   #25
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Bueller?...Bueller?
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Unread 07-23-2013, 08:04 AM   #26
zeus87gn
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I'm glad to see you scored a good YJ - looks like it's in pretty good shape for a northern vehicle
I can't give any advice on an engine swap, but a 6.2 deisel in a YJ will be nothing but bad azz!
Can't wait to see the results

If you decide to sell that header, please let me know
I've been eyeing that one for a couple of years now

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Unread 07-23-2013, 10:21 AM   #27
AmmitOsiris
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Quote:
Originally Posted by zeus87gn
I'm glad to see you scored a good YJ - looks like it's in pretty good shape for a northern vehicle
I can't give any advice on an engine swap, but a 6.2 deisel in a YJ will be nothing but bad azz!
Can't wait to see the results

If you decide to sell that header, please let me know
I've been eyeing that one for a couple of years now

It's nice, I got one in mine, adds noise really, I didn't feel any power gains... Except I was able to hit 100 with the small tires
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Unread 07-23-2013, 12:03 PM   #28
youngjeepr
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What are the specs on the diesel motor? It sounds like it would be VERY heavy with not alot of power.. I assume it naturally aspirated?
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Unread 07-23-2013, 12:13 PM   #29
CaptainCaveman
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Here are the specs...


Engine RPO Codes: LH6 ('C' series, with EGR) and LL4 ('J' series)
Displacement: 6.2L / 379 cu in
Bore x Stroke: 3.98 in 3.80 in (101 mm 97 mm)
Block / Head: Cast iron / Cast iron
Aspiration: Natural
Valvetrain: OHV 2-V
Compression: 21.5:1
Injection: Indirect
Horsepower / Torque (at start): 130 hp (97 kW) @ 3,600 rpm / 240 lbft (325 Nm) @ 2,000 rpm
Horsepower / Torque (at final): 143 hp (107 kW) @ 3,600 rpm / 257 lbft (348 Nm) @ 2,000 rpm
Horsepower / Torque (army): 150 hp (112 kW) @ 3,600 rpm / 260 lbft (353 Nm) @ 2,000 rpm
Max RPMs: 3,600 rpms
Idle RPMs: 550 + or - 25


And keep in mind this IS NOT the infamous 350 diesel that Oldsmobile tried. This was built from the ground up as a diesel for use in the military pickups and blazers, then adapted for civilian use. What's not listed is the ease of instal. It uses the same motor mounts as a SB/BB Chevy, and weighs in just under a BB. These were made for durability, longevity and mileage. And out of the suburban I picked up, it was getting 18mpg on average! So in the YJ, weighing about 1/3 as much, should get somewhere in the neighborhood of high 30's maybe low 40's.
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Unread 07-23-2013, 12:38 PM   #30
youngjeepr
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Personally I wouldn't use it it sounds like alot of work for not much reward. You can get alot more power out of the 4.0 that would weigh half as much. Is there a reason you want to use a diesel motor other than the "cool factor"?
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