2001 xj swap up to a 5.7 HEMI
 

i have a 01 xj with a hole in the side of the block at #4 cyl. so instead of spending the money on a high milage 4.0, i was looking to swap a 5.7 out of a pick up truck that has been crashed, i can use the entire power train, but the only thing that is holding me back is not being able to find a conversion kit for the electrical system. im a mopar level4 certified tech i know how much of a animal that can turn into without one, i want to keep it multi port injection and still have everything work properly without looking like some frankenstine jeep, the only thing i was able to find was motor mounts from rustys. but any input on where i can find a plug and play system would be awsome

Buy factory wire diagrams from your work assuming you work for a Mopar dealer and build a harness. Cut chop build and get it done.

I've built 40+ harnesses for jeeps, new muscle in old muscle, and..... Hondas.

making the wires connect from one end to the other doesnt worrie me, im more interested in the controller end of the stick. and at some point there is going to have to be a cross over from the 5.7engine to the remaining jeep. if its a stand alone engine controler with no communication to the cluster, ill have allot of homework to do and cutting, splicing and making new circuits. for all the effort that is going to be if no one has a offering for one ill probably start building them for sale. but im still hopeong someone has already done the homework for it

That's what I'm saying. Make the 2 work.


If I can shove a injected hemi in a 70 cuda and build a harness you should be able to make 2 match

At least its mopar and mopar, you should be able to get everything working like stock its all about time, just saying.. also is the motor trans going to be to Long? Also welcome to the fourm man!

A 545rfe isn't much longer than the auto trans that's in it now. But the problem I'm worried about is going to be the computer system. Its easy to put a stand alone system in a old car because it has nothing that needs communication with the pcm. And if you don't know what I mean by that. I'm going to have to figure out how to make a NGC or SBEC pcm comunicate with the JTEC pcm and system.

They is no current conversion for ngc bus to jtec. A custom pcm would have to made for the setup. It would have to be a standalone management with the ability to control a drive by wire system. Or you could swap everything over from the truck, then you would have to deal with issues with immobilizer, bcm, gauge cluster, ect. Just a huge mess. The hemi is just a pain in the ***

Worth the pain in the @$$? No
Cool as hell? You bet!
JMHO

My jeep doesn't have an immobilizer and idk about the truck with the hemi but you can disable the older style with a factory s

LS swap! it's already been done :p

Wow, Really? :thumbup:

Why be a sheep, im one to walk my own line.

Hell yes! Nice to hear from someone who isn't going to defile yet another Jeep
with a GM motor. :icon_smile:

The XJs started out with gm engines..

Once you go mopar... :D

Your **** breaks...

See what I did there? I finished that for you.

:rofl:
There IS a reason that the LS series of engines is currently used in everything from drag Hondas to drift cars to buggys etc. despite anyone's personal views on GM in general, the LS is a friggin beast!

LQ9 is were its at

Mmmmmm. HELL yeah, thats the 6.0L (stock) right?

For those who don't know, these dudes build some SICK LS's. They also do a couple nice I6 strokers for the Jeep purists:)

http://www.golenengineservice.com/

Um when?
AMC>Chrysler I don't remember Gm being in there.

Edit: Oh you meant the V6 LOL

Ha ha nice man

this is a great build thread haha

Any v8 you put in a jeep is nice but I know the ins and outs of a hemi. And being I work a dodge, jeep, chrysler and ram dealer if I get stuck ill email the enginers and see if they have any input

have fun.

Sir if you do it, please make a video, I'm not asking you to trash your tires with burnouts, just an overview of your setup. Thinks man!

The only thing keeping me from doing it is that there is over a month of work involved and my 98 gas getter isn't too fond of snow. But there will be a tire shreading video...... you know, to test the... drivetrain haha

Sweet man!!! I'm excited man!!

Will be watching this one closely. I have plans of eventually putting a 5.7 hemi in my 01 also.

making a harness is the easiest part imo.... just take a picture of the old harness and new one, and you draw how the wires connect, and it its easy once you have written down...

That is the most difficult part. Unless your going to make a garbage setup, the wiring is the most complex part when mating two completely different computer systems

And talk about a lot of head scratching !

if you have the wiring schematics, its just trace and connect. when i had my spec-v sentra, i helped my buddy swap in a vq35 from a maxima, we were one of a handful of ppl on the sentra forum who did the swap and didnt have one cel....all we did is spread out the wires flat from the old harness, and made a photcopy of the wires, and did the same for the new harness, and we then got the layout of what wire was what, and traced on paper what wire from new connected to wire from old. took about 1-2hours, and went smooth...

Its not that simple in this swap.. The Hemi PCM will not talk to the gauges, ignition ect in the Jeep. From what I can see here the OP is wanting to keep his factory gauges and whatnot.
Also I think on the Hemis they require inputs from the original vehicle body control module before they will allow fuel and spark as part of the security system. This cannon simply be bypassed, its a bag of worms from hell.

did you ever do this I’m looking into doing the same thing wanted to know how it went I have a 05 magnum R/T with no title and a 01 Cherokee so I have everything I need besides custom mounts and what not