I have never done it, but I looked into it for a bit. The easiest way would be to scrap every wire, every computer that Chrysler put in the Jeep, right down the the turn signals, windshield wipers and even the heat and A/C. Then start from scratch with analog gauges, and a custom dash. This is because the PCM and the TIPM control everything that your JK does, and they quite often need to talk to each other. The fact that this is a 100% mechanical engine is your problem. The JK relies on electronic everything to know what is happening, and you canít get that with a mechanical engine.
If you are dead set on a diesel the Cummins R2.8 would likely play nicer with the JK, but will be way more money as it is a new crate engine, plus it is electronically controlled.
In my opinion an LS 6.2L truck motor will have more torque at and just off idle than a diesel as the LS torque curve is fairly flat but peaks later, and a diesel is steeper, but peaked early. Plus the diesel doesnít have much power untill the turbo spools up where as an N/A LS will have power as soon as you hit the throttle. Plus there are several venders on here that specialize in LS swaps like Motec and RPM Extreme and can make everything work like normal.
We havenít even begun to scratch the surface on being emissions legal. You will need to be legal for the year of the engine or vehicle (whichever is newer) is now I believe it works in most jurisdictions. With a 4BT that will be your JK. This means you will need an EVAP system, which is computer controlled. That is just the start of the hassle for emissions.
If this Jeep isnít going to be licenced for the road, you have less to worry about and can just giv Ďer shit and rip all the Chrysler bullshit out and not look back, while having a cool JK buggy. If that is the case start a build thread here as we will want to see the progress.
2012 JKU Rubicon - Build Thread -
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