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  #1  
Old 06-10-2015, 07:40 PM
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6.1 swap

I recently destroyed my '05 5.7, and I'm looking for what amounts to a parts list for a possible 6.1 swap. Would like to keep as much OEM as possible for now, such as the hydraulic pump and fan assembly, but I'm almost certain a new ECU is needed. Not sure of much past these and the obvious exhaust differences, but I know this has been done before and I get the feeling it's not too difficult.

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  #2  
Old 06-18-2015, 12:41 PM
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Re: 6.1 swap

I am not familiar with all that needs to be done, but just swapping the PCM won't get it. The 6.1's run the NAG1 transmission and have a separate TCM, whereas the 5.7's have the TCM incorporated into the PCM as one unit. Other things that may cause issues are; the MDS....the 6.1 doesn't have it, so what to do with the wiring harness to the MDS solenoids; the EGR Valve....the 6.1 doesn't have on, so again what do do with the wiring harness. It would take a Diablosport CMR tune to get it shut off in the PCM or, I suppose you could modify the right side exhaust manifold, build a bracket and mount an EGR Valve, cut a hole in the 6.1 intake and run the tube from the EGR to the intake. Way more trouble than it's worth though, IMO. I don't know for sure, but I have heard that the block is drilled/tapped for MDS Solenoid and, if so, all you'd have to do (maybe) is take the solenoids out of your 5.7, find a way to get the wiring harness into the valley and it might work. I know if I ever did a 6.1 (or bigger) mod. I'd stick with the 5.7 based components (except for injectors and just do bore/stroke to get it where I wanted it. That way there would be only miminal problems and for sure a custom tune.
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Old 06-18-2015, 12:53 PM
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Re: 6.1 swap

see if bpeusa.com can help you.
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Old 06-19-2015, 01:25 AM
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Build?

turns out my block *may* be alright after all. so new question: how would you spend 8K on engine mods? I'm looking seriously at gaining displacement and getting some big valve heads and LT headers. these three are the ones i can think of that are definitely easier to do with the block pulled. everything else i can get to in a weekend if need be.
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Old 06-19-2015, 09:02 AM
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Re: 6.1 swap

Heads, cam, headers, and a torque converter will keep you under 8k. You can also do a stroker too.
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Old 06-19-2015, 10:24 AM
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Re: 6.1 swap

Over about the past six years, I've spent about $6K doing mods. on mine, and have gained nearly 100 more horsepower. Only about half of that was spent on the engine/drivetrain though. My engine was good, so I did everything that was relatively non-invasive......custom headers/exhaust, cam/6.1 valvetrain (without removing heads), UD pulley, tuners, throttle body, ignition coils, custom CAI, trans. pressure booster, shift schedule mods. and a shift kit. IMO, unless you're going to do a lot of racing, a stall converter will not be that beneficial for street driving. Years ago I used to have a 3000 RPM stall in one of my vehicles and, it was a hoot to drive, especially off the line and at low speeds but, again IMO, not real practical for a DD. Back then I did a lot more racing than I do today.

If you have to do a crank and pistons, definitely do a stroker kit. If you do a stroker kit, definitely do the bigger heads. If you keep the stock displacement (with a good header back exhaust) bigger heads are only worth about 30 hp. unless you're going to forced induction or nitrous oxide. The current (July 2015) Mopar Muscle magazine did an article showing the difference in flow rates between stock and ported heads for a 5.7. At a half inch lift, the ported heads delivered only 33 more CFM on the intake side and 36 CFM on the exhaust side than the stock heads. Certainly not worth it, IMO, unless you're going to a larger displacement, higher compression, forced/N2O induction system.
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Old 06-20-2015, 08:01 AM
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Re: 6.1 swap

Great information.
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Old 08-06-2015, 06:27 PM
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Re: 6.1 swap

Update: block is just fine, as are the crank and seven of the rods and pistons. Still stroking it. I found 6.1 heads, intake manifold, and injectors for cheap, so I'm going that route as well.
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Old 08-07-2015, 12:45 AM
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Re: 6.1 swap

Quote:
Originally Posted by 05AKWK View Post
Update: block is just fine, as are the crank and seven of the rods and pistons. Still stroking it. I found 6.1 heads, intake manifold, and injectors for cheap, so I'm going that route as well.
Excellent.
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Old 08-07-2015, 08:11 AM
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Re: 6.1 swap

A 3k or 3200 stall would be just fine in a DD Jeep. I had one in my previous Jeep. Excellent street manners.
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Old 08-10-2015, 08:39 PM
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Re: 6.1 swap

I still want to off-road, so probably leaving the stock torque converter, does anyone know the stall point on it? Haha, and anyone want a spare crank?

My next decision is what to do about the cam. I heard from a friend that I can get a custom grind at inertia.
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  #12  
Old 08-09-2016, 06:58 PM
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Re: 6.1 swap

This entire project has been speed bump after roadblock, but now is getting much closer to complete. Currently: stock block, Manley 392 kit, 6.1 heads, custom Crower cam from inertia, and long tubes. Other supporting bits too, like 6.1 injectors, but those are boring.
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