4.7 engine swap
06-10-2011, 03:37 PM
#1
JK Enthusiast
Thread Starter
Join Date: Jun 2008
Location: Boston
Posts: 367
Likes: 0
Received 0 Likes
on
0 Posts
4.7 engine swap
I think it's a great motor, reliable, pretty gutsy, and can pick up a new one for less than 2k.. Anyone ever put one in a JK? Thoughts?
06-10-2011, 04:46 PM
#3
JK Enthusiast
Thread Starter
Join Date: Jun 2008
Location: Boston
Posts: 367
Likes: 0
Received 0 Likes
on
0 Posts
I won't be doing one soon, but next year I was thinking of doing one and was leaning towards an LS3 swap. After doing the research, Dynatrac told me an LS3 would put a huge strain on D60s and could lunch them. So an LS3 would probably require D70s front and back. Then I stumbled on a new 4.7 for an 04 Grand Cherokee for $1800 which got me thinking.. A 550hp LS3 is overkill, even though it would be cool as hell. And my old GC had a 4.7 in it and it had balls to it. I would imagine it would work with the JK comps, smaller in size so no overheating problems, and have more than enough power to make a JK with 37s fun and put you in your seat when you need to get somewhere quick..
06-10-2011, 05:09 PM
#4
JK Enthusiast
Join Date: Aug 2010
Location: Kelowna, BC
Posts: 415
Likes: 0
Received 0 Likes
on
0 Posts
I loved that engine in my Dakota too! Tons of balls. 
I think I remember reading an article in JP magazine that rated it as one of the worst engine swaps for the JK. I think I still have that issue kicking around to confirm.
I think I remember reading an article in JP magazine that rated it as one of the worst engine swaps for the JK. I think I still have that issue kicking around to confirm.
06-10-2011, 05:32 PM
#5
JK Enthusiast
Join Date: Feb 2011
Location: Grover, pa
Posts: 229
Likes: 0
Received 0 Likes
on
0 Posts
I believe the limiting factor is that the electronics on the 4.7 are not closely related to anything in the jeep.. And the hemi uses many of the same controls. I believe I saw a discussion on this once on aev's site. The hemi does need a special computer, but the 4.7 would need entire harnesses and custom gauges, as the canbus signals aren't compatible. At least that's what I remember.
06-10-2011, 06:06 PM
#6
JK Freak
Join Date: Nov 2006
Location: Riverton, Utah
Posts: 964
Likes: 0
Received 0 Likes
on
0 Posts
I think the 4.7 is closer in relation to the magnum engines, 5.9 and 5.2. I personally like the engine and thought it was very responsive. Not a huge power maker but better than the 3.8
Trending Topics
06-11-2011, 08:54 AM
#8
JK Enthusiast
Join Date: Feb 2011
Location: Grover, pa
Posts: 229
Likes: 0
Received 0 Likes
on
0 Posts
It is electronically closer to what the magnum motors were.(4.7's that is). Hence the reason computer have been made available rather quickly for the hemi conversion, which is controlled more like the 3.8l.
06-11-2011, 10:29 AM
#9
JK Enthusiast
Thread Starter
Join Date: Jun 2008
Location: Boston
Posts: 367
Likes: 0
Received 0 Likes
on
0 Posts
I believe the limiting factor is that the electronics on the 4.7 are not closely related to anything in the jeep.. And the hemi uses many of the same controls. I believe I saw a discussion on this once on aev's site. The hemi does need a special computer, but the 4.7 would need entire harnesses and custom gauges, as the canbus signals aren't compatible. At least that's what I remember.
06-11-2011, 12:23 PM
#10
JK Enthusiast
Join Date: Dec 2010
Location: Wright City, Missouri
Posts: 361
Likes: 0
Received 0 Likes
on
0 Posts
Do the LS!! Just keep ur foot off the pedal lol. Guy here in Missouri had an LS1 in a jeep( TJ?) with Dana 60's and when he went thru a mud pit at the local mud run he made his gears look like a brake rotor. At 5,000 rpm and mid-pit he broke every tooth 5.38 gears. :crazyeyes!