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Old 05-01-2018, 09:08 PM
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Motor Swap

Currently have an original 4c in my 88. Can I get some opinions on what to swap it with? I’m tired of killing it to make it go the speed limit lol

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Old 05-01-2018, 09:16 PM   #2
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2UZ-FE would be a cool swap not sure if it would fit though

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Old 05-02-2018, 01:22 PM   #3
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How much money ya got?
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Old 05-02-2018, 03:33 PM   #4
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A small block Chevrolet is a common swap. Depending if you want fuel injection or the simplicity of a carb, I'd look for a wrecked 4X4 truck and use the motor, transmission and transfer case (as long as the TC front drive runs under the driver).

Before I even started a project like that, I'd research the cost and begin saving my nickels and dimes. Advanced adapters has a lot of what you'll need.
If you plan on building a FI rig, be sure to get the brain and complete harness from the donor vehicle. A FI setup from Howell is in the $1500.00 range. An aftermarket radiator for SBC in a YJ is $350.00-$500.00. You'll need two custom made driveshafts plus a sturdier rear axle. And a bunch of other stuff, but that's just for starters.

If I were to plan on such a conversion, I wouldn't put a wrench to my Jeep until I had everything I needed sitting in my garage and another couple/few Grand in the bank.

As stated above, a SBC is a common swap. I'm partial to small block Fords because the distributor is on the front of the motor (if you plan on a carbed setup).
A V8 Mopar swap probably has plenty of fans.

The least expensive swap will be a 4.0 from a Cherokee XJ. Rusted/wrecked XJs can be had for a Grand or so with low enough miles that you should get years of use from the drivetrain.

Good Luck, L.M.
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Old 05-02-2018, 08:28 PM   #5
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Originally Posted by agalloch07 View Post
2UZ-FE would be a cool swap not sure if it would fit though
I was just thinking about this the other day. As a huge Toyota fan I'd love to swap to this. Can only imagine it would be a tough swap mechanically and financially.
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Old 05-02-2018, 08:55 PM   #6
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5.3 LS. Probably as cheap as any swap and an awesome motor
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Old 05-02-2018, 10:42 PM   #7
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I was just thinking about this the other day. As a huge Toyota fan I'd love to swap to this. Can only imagine it would be a tough swap mechanically and financially.

I am a inline 6 fan i would never swap my 4.0 out. But if i did i would either do a AMC V8 or a 2UZ-FE i am not sure how i could adapt it to my NV4500 or if there is a way to adapt it to an AX15. I am just not a fan of chevy ford or dodge American car makers all went to a Planned Obsolescence with the way they build cars.

I have nothing against the pre 80's GM/Ford/Chevy. I like American Muscle cars and the 69-72 K5 blazers and 66-77 broncos but those days are long gone I'd rather buy a import because they last. I am sick of seeing small blocks in jeeps i detest the 350 more than the AMC 2.5 lol
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Old 05-03-2018, 01:35 AM   #8
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Depending on how much your willing to put in money, & time. 350 swap can be great, but takes a little more fabrication and fuel injection is expensive. Carbs are great but really lack the modern convenience of fuel injection.
I'm not sure how difficult it is to swap in a 4.0, this would give you the advantage of putting in a engine that is meant for your body and frame.

If your level of expertise, I would say a Coyote or LS engine would be the best possible upgrade you could make, if you have the time, skill and money.
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Old 05-03-2018, 02:21 AM   #9
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Originally Posted by agalloch07 View Post
I am a inline 6 fan i would never swap my 4.0 out. But if i did i would either do a AMC V8 or a 2UZ-FE i am not sure how i could adapt it to my NV4500 or if there is a way to adapt it to an AX15. I am just not a fan of chevy ford or dodge American car makers all went to a Planned Obsolescence with the way they build cars.

I have nothing against the pre 80's GM/Ford/Chevy. I like American Muscle cars and the 69-72 K5 blazers and 66-77 broncos but those days are long gone I'd rather buy a import because they last. I am sick of seeing small blocks in jeeps i detest the 350 more than the AMC 2.5 lol
While I can't argue with anything you said, there might be two considerations here. First, that the 5.3 swap is very common, thus no shortage of advise and/or parts to be had, making for a simpler job.
Second might be how original the owner would want to be about an engine swap. Along those lines we find the Toyoters, diesels etc etc. I have stated before that I would love to put a Ford V-10 in a Jeep. Why? Just cuz it'd be different. And expensive. With little or no help or parts available.
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Old 05-03-2018, 04:17 AM   #10
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Originally Posted by agalloch07 View Post
I am a inline 6 fan i would never swap my 4.0 out. But if i did i would either do a AMC V8 or a 2UZ-FE i am not sure how i could adapt it to my NV4500 or if there is a way to adapt it to an AX15. I am just not a fan of chevy ford or dodge American car makers all went to a Planned Obsolescence with the way they build cars.

I have nothing against the pre 80's GM/Ford/Chevy. I like American Muscle cars and the 69-72 K5 blazers and 66-77 broncos but those days are long gone I'd rather buy a import because they last. I am sick of seeing small blocks in jeeps i detest the 350 more than the AMC 2.5 lol
I totally agree. Every vehicle in my yard is an import, Toyota in fact, except my YJ. And although I love my Jeep, it's for fun and recreation. Imagine if you could have the reliability of a Toyota in the body of a Jeep. The best of both worlds. To take it a step further how about we swap in a 5.7 from a late model Tundra like I drive? That would be a beast! 381 HP and 405 ft lbs of torque. I don't think I'd trust myself enough to drive it, lol.
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Old 05-04-2018, 11:00 AM   #11
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Sell the 88. Go buy a YJ with a 6. Honestly. 6 cyl YJs are around for $5k-$7k. Your 88 nab you more than half the cost to get a YJ with the 6. The difference out of pocket is much cheaper than swapping motors when you add all the added costs.

Swapping motors is awesome. But anyone who's done it will tell you whatever you think it will cost - double or triple. Not to mention the time for what seems like a run around Jeep.
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Old 05-04-2018, 04:33 PM   #12
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I would go cheap.

Buy a 4.0 and 4.2 rods/crank and build a cheapy stroker. 4.0 kicks ass, so simple to work on and extremely reliable. I would love to v8 swap my YJ but the 4.0 is just fine until I make millions one day...
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Old 05-05-2018, 11:16 AM   #13
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Something else you might want to consider when switching engines is the effect it will have on your drive train. When I first did my 350 swap I used a TH350 with a pretty jerky shift kit in it. Needless to day I broke driveshaft straps, sheered bolt heads off straps. ect.
Trust me when I say, it makes for a shit day when you drop your driveshaft and its banging the &#^@ out of the exhaust and underside of the Jeep. (Probably one of the only benefits of the Slip Yoke is the drive shaft goes bang bang drop to the road.)

Also depending on how you drive axle ratio and axle strength begin to play a factor with more HP/Torque.

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