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  #256  
Old August 30th, 2017, 13:48
jmg222 jmg222 is offline
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Re: 5.2L Magnum XJ engine swap

check out novack's site-- they have written up a lot about the pros and cons of doing an ls vs. a mopar swap, and for a lot of reasons, the ls is actually a lot easier.

Not trying to convince you one way or the other, but as someone that has already gone through this (I had a choice of either a 5.9 or a 350, went with a 350), I'm glad I went chevy. just check it out.
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Daily drive: 2014 Jeep Grand Cherokee SRT; stock (for now)

Trail ride: 1988 XJ: Motor/plumbing/electrical: 350 sbc, crane cam, holly performer intake, Terminator EFI, novak shorty headers, novak aluminum radiator; MSD ignition
Drive train: d30 front, F8.8 rear, 4.11 gears, np242 transfer case, rusty under-armor; fully locked with detroit lockers; Chevy 700r4 tranny, 35" MT's
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  #257  
Old August 30th, 2017, 15:08
Green XJ Jeep Green XJ Jeep is offline
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Re: 5.2L Magnum XJ engine swap

LS is a great motor but price and availability is a huge factor for alot of swaps.
In my area your are going to have a real hard time finding a decent 5.3 with computer for under $2500. Then thow in a tranny at $1100 you are starting to talk about some serious cash even before the swap parts are purchased.
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  #258  
Old August 30th, 2017, 16:02
jmg222 jmg222 is offline
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Re: 5.2L Magnum XJ engine swap

right, my only point is that while that may be true, chevy swaps are far, far more common, any adapter, computer, wiring harness, etc. you could possibly want has already been made. I know several people that started out with a mopar swap for the very same reason, and ended up sinking in far more $$ into it than originally anticiapted.

AGain, I'm not advocating one way or the other, I think it's worth a quick read at Novack's site, just make sure you know what you're in for.
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Daily drive: 2014 Jeep Grand Cherokee SRT; stock (for now)

Trail ride: 1988 XJ: Motor/plumbing/electrical: 350 sbc, crane cam, holly performer intake, Terminator EFI, novak shorty headers, novak aluminum radiator; MSD ignition
Drive train: d30 front, F8.8 rear, 4.11 gears, np242 transfer case, rusty under-armor; fully locked with detroit lockers; Chevy 700r4 tranny, 35" MT's
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  #259  
Old August 31st, 2017, 03:00
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Demonoid369 Demonoid369 is offline
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5.2L Magnum XJ engine swap

While the ls is probably the best to swap, I know when I get to that point I'll still go with a 5.2-5.9 simply for the ease of wiring and having everything work correctly with cruise, overhead console, gauges.
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  #260  
Old August 31st, 2017, 06:01
jmg222 jmg222 is offline
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Re: 5.2L Magnum XJ engine swap

Quote:
Originally Posted by Demonoid369 View Post
While the ls is probably the best to swap, I know when I get to that point I'll still go with a 5.2-5.9 simply for the ease of wiring and having everything work correctly with cruise, overhead console, gauges.
ok.
I personally think you're overselling how much easier it will be to wire in a mopar vs. non-mopar motor (it's actually quite easy to get the electronic bits on an LS to play nice), but you have to do what you feel is best.
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Daily drive: 2014 Jeep Grand Cherokee SRT; stock (for now)

Trail ride: 1988 XJ: Motor/plumbing/electrical: 350 sbc, crane cam, holly performer intake, Terminator EFI, novak shorty headers, novak aluminum radiator; MSD ignition
Drive train: d30 front, F8.8 rear, 4.11 gears, np242 transfer case, rusty under-armor; fully locked with detroit lockers; Chevy 700r4 tranny, 35" MT's
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  #261  
Old August 31st, 2017, 11:10
khales6 khales6 is offline
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Re: 5.2L Magnum XJ engine swap

I think what Demonoid369 was implying, and what I have seen on here, is that the cruise needs some electronic work that is way beyond the capability of most of us. The gauges need to keep the original computer, which is a bit of a hack if you ask me, and I haven't heard ANYONE say they did an ls swap with an ovehead console and got it all working. Not actually sure the mopar route gets that working either. I want my stock gauges, the cruise and the console working. Mine is a DD and not cut up. I plan to keep it a jack of all trades kinda rig. Not sure I'll ever do a V8 in it, but I'm thinking about it.
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  #262  
Old September 1st, 2017, 01:22
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Demonoid369 Demonoid369 is offline
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5.2L Magnum XJ engine swap

Quote:
Originally Posted by khales6 View Post
I think what Demonoid369 was implying, and what I have seen on here, is that the cruise needs some electronic work that is way beyond the capability of most of us. The gauges need to keep the original computer, which is a bit of a hack if you ask me, and I haven't heard ANYONE say they did an ls swap with an ovehead console and got it all working. Not actually sure the mopar route gets that working either. I want my stock gauges, the cruise and the console working. Mine is a DD and not cut up. I plan to keep it a jack of all trades kinda rig. Not sure I'll ever do a V8 in it, but I'm thinking about it.


This lol
I haven't see a successful ls swap that allows full use of the gauges and dash and cruise. Most I've seen is everyone goes another route like new gauges and something just let go of because trying to incorporate the two system was too difficult or troublesome.
I suck at wiring and I don't need the extra headache of trying to make two electric system work with each other.
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  #263  
Old September 1st, 2017, 01:46
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indian indian is offline
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Re: 5.2L Magnum XJ engine swap

Quote:
Originally Posted by Demonoid369 View Post
This lol
I haven't see a successful ls swap that allows full use of the gauges and dash and cruise. Most I've seen is everyone goes another route like new gauges and something just let go of because trying to incorporate the two system was too difficult or troublesome.
I suck at wiring and I don't need the extra headache of trying to make two electric system work with each other.
My XJ LS swap has all gauges working except tach (will be solved later). The cruise control is not working yet, but it should not be a problem, because the CC cable is pure mechanical thing in my DBC setup, the buttons on steering wheel will function also, because stock jeep PCM is working, speedo signal is present and CCD bus is working also.

If you have DBW setup, then you can use the stock GM control like Racer32 did.

I think any engine swap (except stock 4.0) is about the same electrical and mechanical difficulty level with smal differences. If you can make magnum swap working, you would do LS swap also.
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  #264  
Old September 1st, 2017, 07:31
Green XJ Jeep Green XJ Jeep is offline
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Re: 5.2L Magnum XJ engine swap

They are both well documented swaps.
Both are worthwhile and cost about the same and are about the same difficulty.
Budget and availability are the only real deciding factors.
I personally would never do an ls swap in an xj. I can purchase a complete low mileage zj with a 5.9 for what a high mileage ls motor and trans would cost me.
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