JKOwners Forum banner

1 - 13 of 13 Posts

·
Registered
Joined
·
40 Posts
Discussion Starter #1
I have a 18 jkurr auto. If I use a junkyard 6.4 out of a 2015+ charger/challenger will the accessories from the donor ( starter, AC, alt, PS pump etc.) be used?
Or will some of the 3.6 stuff be used? I plan on the AEV kit. Am I further ahead with the drop out, or just get a new crate?
 

·
Registered
Joined
·
40 Posts
Discussion Starter #2
Ok, it seems there isn't a definite answer. I've found a low mile 17 srt 6.4 with accessories. I'm going for it. I will let ya'll know what I end up with.
 
  • Like
Reactions: inline6

·
Registered
Joined
·
5 Posts
My guess is the the pentastar accessories won't work. Get all of the stuff from the donor that you can. But it looks like the kit comes with everything else?


Sent from my iPhone using Tapatalk Pro
 

·
Premium Member
Joined
·
543 Posts
You'll need to reuse your PS pump (the '17s don't come with one). May also need a smaller PS pump pulley.

Not sure about AEV's harness and PCM programming, but the JSS kits can't use the newer AC compressors because they have an extra electrical connector on the back.

AEV used to require slightly modifying and reusing the Jeep AC compressor.
 

·
Registered
Joined
·
40 Posts
Discussion Starter #6
So did you go dropout or crate? And what made your decision?
I got a 6.4 crate. My reason was, f-it. It's a new jkurr. Put in a new mopar. Use new parts. Get it done. Go play.
 

·
Registered
Joined
·
40 Posts
Discussion Starter #7
You'll need to reuse your PS pump (the '17s don't come with one). May also need a smaller PS pump pulley.

Not sure about AEV's harness and PCM programming, but the JSS kits can't use the newer AC compressors because they have an extra electrical connector on the back.

AEV used to require slightly modifying and reusing the Jeep AC compressor.
Yup, they have you get a AC pump from 3.8 JK and do a little material removal.

PS pump from the 18 3.6 is tiny with a remote res. Had to get a 3.8 JK ps pump with integral res. I hope it has more balls.

Almost nothing from the 3.6 is used.
 

·
Registered
Joined
·
40 Posts
Discussion Starter #8
progress picture

0420181821.jpg
 

·
Registered
Joined
·
1,258 Posts
I have done a Hemi swap with a JSS kit, which is similar. You have the body off, if I had to do it again I would have put a set of SRT8 headers or some aftermarket headers while I had it apart. I got a set after the fact and have been sitting on my toolbox nearly two years. Bets of luck with the swap. You will enjoy the shit out of your Jeep upon completion.
 

·
Registered
Joined
·
1,185 Posts
I'm sure you will have a blast. Thank you for the update. My plan is for next year since my 3.8 has 150k+
 

·
Registered
Joined
·
40 Posts
Discussion Starter #11
I have done a Hemi swap with a JSS kit, which is similar. You have the body off, if I had to do it again I would have put a set of SRT8 headers or some aftermarket headers while I had it apart. I got a set after the fact and have been sitting on my toolbox nearly two years. Bets of luck with the swap. You will enjoy the shit out of your Jeep upon completion.
A set of SRT8 header type manifolds came with the crate motor and a clutch, pressure plate and flywheel. I haven't checked the manifolds for fit in the chassis. I have Borla headers and full exhaust on order. There is a shitload of extra stuff between with takeout 3.6 and things off the crate motor.
 

·
Registered
Joined
·
19 Posts
This is just advice and not intended to badmouth your plans but as someone who has studied Hemi vs LS swaps before deciding on the LS, I would tell you that there are many reasons why I decided on the LS route. Some of them are; LS swap is easier with the right kit (I used RPM Extreme Kit), the LS is lighter, the LS does not require physical modifications to the car other than new motor mounts, the LS get's better gas mileage typically, and the LS swap is cheaper to do by a substantial amount. I used a new LS3 430hp crate motor and almost new 6L80 transmission and the cost to do it myself with almost all new accessory drive was about $15K. I have seen many Hemi conversions and have yet to see one that turned out as well as mine. After doing the swap my Jeep has had zero problems associated with the conversion and it now has 40K miles on it. If you are open minded about the LS swap call Jon at RPM Extreme before buying a kit. His conversions are the best on the market in my opinion. Good luck to you though either way you go.
 

·
Registered
Joined
·
1,258 Posts
This is just advice and not intended to badmouth your plans but as someone who has studied Hemi vs LS swaps before deciding on the LS, I would tell you that there are many reasons why I decided on the LS route. Some of them are; LS swap is easier with the right kit (I used RPM Extreme Kit), the LS is lighter, the LS does not require physical modifications to the car other than new motor mounts, the LS get's better gas mileage typically, and the LS swap is cheaper to do by a substantial amount. I used a new LS3 430hp crate motor and almost new 6L80 transmission and the cost to do it myself with almost all new accessory drive was about $15K. I have seen many Hemi conversions and have yet to see one that turned out as well as mine. After doing the swap my Jeep has had zero problems associated with the conversion and it now has 40K miles on it. If you are open minded about the LS swap call Jon at RPM Extreme before buying a kit. His conversions are the best on the market in my opinion. Good luck to you though either way you go.
$15k for your swap isn’t bad I suppose. The LS May be 100-150lbs lighter. I can’t see, especially at the time I did a V8 swap(2.5 years ago) an LS swap being easier. Don’t know about now either. I did a Hemi swap that was plug and play. Only mod was welding on new motor mounts. Never done anything like this in my life. Started up first time. Never had an issue. Install looks very clean. I am a pretty critical person and I am happy. Even if I had done an LS swap I would have done a 6.2 or nothing. The 5.3, was not an option. The wife’s Yukon has one, not exciting. Did a 5.7 Hemi swap after selling the 3.8 engine and trans, and the Xfer case that came with the Hemi I have south of $7k in it. I do not have a Borla exhaust. Would be nice. But I did go to the local exhaust shop.
 
1 - 13 of 13 Posts
Top