Originally Posted by Yankee

The hemi is a decent V-8, the LS engines are sweet. But the main reason people are putting the above engines in is that it has been done before. Someone has went through the pain and even developed DIY kits. Which means the Jeep is not sitting in the garage for months while all the electronics, fitment, drivetrain, accessory problems are figured out.

Instead, with a kit it can be up and running in a couple weeks or less, with everything working like factory. A/C, ABS, guages work, no engine codes. And it can be done for 10 grand or less if you do it yourself. Still a chunk of money, but it is quite a difference.

No doubt someone could, and will, or somewhere already has, put many other engines in a JK. But they probably spent months figuring it out. Chasing computer codes, hunting for adapters, etc...

Many people do not have the skills, time, or desire to do that. Especially if the JK is their daily driver, they do not want it to be inoperative as a grand experiment for months. They would rather pony up the money and get er done.

Originally Posted by B 1000

Around here in CA, most places want 20-26k for the HEMI swap. My buddies and I can do the swap, but the engine alone is a pretty good chunk of change. But I guess it beats spending less on an engine, but having to get everything custom built to get it operable.

Originally Posted by Yankee

The ones I read about doing it for 10 grand were mostly using a used engine and tranny. The kits alone run 4k to 5k. That only leaves 5k for engine/tranny and odds and ends. Certainly don't want to go through the trouble and than have junk installed.

I would have to DIY before spending 20k+ though. Professional work is nice, but that is a lot of money on my income.

There should be kits coming (unless I missed them already out) for the LS swaps, and those engines might be more common/less money than a hemi?

Originally Posted by danmojo82

Cummins 4BT Diesel
*Horsepower - 105 hp @ 2,300 RPM #
*Torque - 265 lb-ft @ 1,600 RPM #
#Common rating, though horsepower & torque ratings may vary by application

Ford 3.5L V6 Ecoboost
* Horespower - 365 @ 5000 rpm
*Torque - 420 lb-ft @ 2500 rpm

Jeep 3.8-Liter V6
*Horsepower - 202 @ 5200 rpm
*Torque - 237 lb-ft @ 4000 rpm

Jeep 3.6 Pentastar
*Horsepower - 285 hp @
*Torque - 260 lb·ft @ 4,800 rpm

Jeep 2.5 CRD
*Horsepower - 140 @ 4000
*Torque - 253 @ 2000

Jeep 3.0 CRD
*Horsepower - 218 hp @ 3,800 rpm
*Torque- 377 ft/lbs @ 2000 RPM

Dodge 5.7-liter HEMI V8 MDS dual Variable Valve Timing
*Horespower - 390 @ 5900
*Torque - 407 @ 4000

LS1, 5.7L
*Horsepower - 350 @ 5,600 rpm
*Torque - 360 lb-ft @ 4,400 rpm

LS6, 5.7L ('01 Corvette)
*Horsepower - 385@6,000
*Torque - 385@4,800

If it were cheaper I'd honestly go the ecoboost route, its hard to beat its torque to RPM ratio not to mention the HP. But other than that, I'd go a diesel option.

Originally Posted by itsajeepthing91

According to jeffs jeep yard 4bt makes 215 HP + 492 Ft. Lbs of torque at 2800 rpms. If I could afford an engine swap my preference would be 4bt or hemi.

Originally Posted by danmojo82

This is a website for all sorts of Cummins specs, itll make you want a 5.9L Cummins in your Jeep

http://www.cumminsdieselspecs.com/4bt.html

If you go to this part of the website you'll see them talking about a possible V6 cummins coming out for smaller chrysler vehicles.

http://www.cumminsdieselspecs.com/v6_cummins.html