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Old 11-19-2013, 06:37 AM   #1
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stroker and turbo vs 5.3 or 4BT

Ok, so here's the boat I'm in... I can either turn my 4L into a stroker(4.7? I can't remember off the top if my head...) and then add a turbo also... the stroker would be good for crawling and then the turbo could spool up when I get in mud to give me the added power I need... or I was also considering a 5.3L swap, maybe even the cummins 4BT... can anybody give me the ups and downs of each. I already know that the trans, t-case, axles and wiring will have to be dealt with(if I go with a engine swap), along with having to do exhaust and air intake and etc. So none of that is a surprise... but I do rock crawling, and I also play in a lot of mud, my jeep isn't a daily driver. Most of the time I trailer it to the trails. But it still does need to be street legal. It's a 99 4L with the standard trans. Any help would be great

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Old 11-20-2013, 10:41 PM   #2
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I was looking at dropping a 4bt in my Jeep but I'm in about the same situation as you. A few downs I know from a 4bt is that that engine is a heavy dude. Another bad thing is that your whole fuel delivery system will have to be replaced as opposed to just swapping engines with another gas engine. I personally wouldn't like a 4bt for mudding but for crawling it could crawl anything. If I remember right a 4bt has about 310 ft. lbs. which is a great amount for crawling. A 5.3 would be an easier swap plus you'd get the best of both worlds with torque and horsepower but that's just my $.02. I probably didn't help too much but it was worth a shot.

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Old 11-22-2013, 06:07 AM   #3
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Personally I would work with the 4L. Both the 5.3 and 4BT are great mods, I watched the 4BT in action when I was at a jeep jam. It was nice but, I know there is ALOT of changes that go with it. The v8 is the ideal swap as they have many kits to convert your jeep to the hemi. I have witnessed many hemi swaps in jeeps and it is impressive. GO for the hemi swap, you will be happiest IMO. less work and more payoff.
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Old 11-23-2013, 07:31 AM   #4
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Stay with the 4.0L and supercharge it. Can be done for about $2k. Done in 1 day. Adds +60rwhp and +80rwtq. Smog/OBD2 legal. Click on my sig.
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Old 11-24-2013, 08:08 AM   #5
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Good luck trying to tune a heavily modded 4.0
Out of all those options I wouldn't choose neither of them. Look into the 5.9 magnum swap. Its one of the simpler and cheaper swaps. Going from gas to diesel is going to be expensive. Most have $8k+ into doing a 4bt swap. The 5.9 came in Dakotas, Durango's, rams, and vans. It is cheap and plentiful. Here's some info BackWoodsOffroad.com - Performance parts and accessories for off road 4x4's along with Wrangler Jeep V8 conversions.

If I was to do it over again, I would've done the 4.7 v8 or 5.9 swap.

The Chevy ls swap is going to be pretty damn expensive. They make great power, but at a high price. Expect to spend around $1k just for the motor. Use car-par.com to search junkyards for parts. I can get the 5.9's all day for 350-500 bucks
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Old 11-24-2013, 08:49 AM   #6
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4BT is very labor and cost intensive. I have a buddy who started a 4BT swap into his Jeep a year ago and it's still not completely finished.

I vote the 5.9 or 5.3. Plenty of power for a short wheel-based Jeep.
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Old 11-24-2013, 08:50 AM   #7
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Quote:
Originally Posted by The_Dealer View Post

If I was to do it over again, I would've done the 4.7 v8 or 5.9 swap.
I'm curious as to why?
Not happy with the ATK 4.7L Stroker?
I've had my heart set on a similar Golen Stroker for a while now and can probably swap that in a day or two with a friend... and no major mods to make it work (also have 32rh).
It just seems like the best bang for the buck... by far. I'm on a budget.
I would like to know your thoughts since you have real experience with the 4.7L.
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Old 11-24-2013, 01:15 PM   #8
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Im happy with it, but I could buy a j/y 5.9 for $350 all day. With everything needed to swap in, plus the motor/machining, rebuild, I'd have less then $1k in it. Even with a rebuilt trans I'd be cheaper or right at the $2900 I paid for the atk. Don't get me wrong, I love the stroker, but with a v8 you can make more power reliably. Plus you can use the dodge auto and have o/d
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Old 11-24-2013, 01:31 PM   #9
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Plus you can use the dodge auto and have o/d
one of the bigger things pointing me towards a gm swap
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Old 11-24-2013, 01:55 PM   #10
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Will the Dodge 4.7/5.3/5.9 bolt to the TJ auto or 5 speed trans?

Or do you swap in the entire Dodge drivetrain- motor, auto trans, and transfer case into the TJ?
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Old 11-24-2013, 02:05 PM   #11
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Gm is going to cost $$. Wiring, mounts(trans included), pcm mods for anti theft, adapters, etc. Plus you are going to have to run aftermarket guages. There might be a way to connect the ls to run the can-bus gauges, but I never searched that far into it. The ax15 and 32rh are good trans, but I wouldn't trust it behind a 300hp+ engine. You'd have to run a 700r4 and mod the pcm, it go with the 4l60e. The 60e, isn't really a great trans to be using offroad, so you might would want to check into an 80e. I've done numerous engine swaps on a few rigs, and I've always been told its best to stick with the same brand motor. I did a 98 vortec 350 swap in my yj(lt1 I believe?). I ended up getting aggravated with the wiring, and snatched it all out. I ended up going with an afi tunnel ram standalone system. The lt/ls motors can make some big power, but imo a 5.9 mag would be a cheaper, more reliable swap. You can do a few upgrades and be right there at stock ls power.

I've been toying with the idea of collecting stuff and start putting a 5.9 swap together on the side. Prolly nothing in the near future, but definatly possible in a few years. This 32rh isn't gonna last forever...
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Old 11-24-2013, 02:08 PM   #12
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Quote:
Originally Posted by CobraMarty View Post
Will the Dodge 4.7/5.3/5.9 bolt to the TJ auto or 5 speed trans?

Or do you swap in the entire Dodge drivetrain- motor, auto trans, and transfer case into the TJ?
I haven't come across any adapters for the 32rh, but im sure there is one for the ax15. I wouldn't waste my time on a 5.2, it would either be the modular 4.7(wj style) or 5.9 mag. Imo I'd go with the entire trans. The dodge uses a np231 as well, and I believe all that needs to be changed is the input on the case. I think the 32rh uses the same input shaft as the dodge, but don't hold me to it. Since your pcm will already be designed to control the dodge trans, might as well make life easier

OP, I'd go with the 5.9 as it would be cheaper, then spend the money you saved on axles. The d35 prolly won't make it out of the driveway. Especially considering your first drive is going to be wfo

EDIT: http://www.jeepforum.com/forum/f9/wr...ssion-1365878/

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