Best engine for intended purpose

[TrailMax]

You say “most fuel efficient“. How com I’ve read where people took their 4XE on a trip and get terrible mileage? The electric only last like 30 miles, then you are only on the 2.0 and pulling all that extra weight.

The "electric only last like 30 miles" means all electric power. After that, it's still a hybrid with the motors working with the ICE - even when the battery gauge shows "< 1%."

Terrible mileage? It's a Jeep. You will greatly reduce efficiency though if you chose to use the ICE to keep the battery charge up.

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[GrayWolf.Overland]

OP asked:


For short commutes and ignoring off-roading it'd be the 4xe. Assuming, of course, your cold weather doesn't hinder the battery significantly.

most folks on the forum don't like the 4xe for the complexity (more parts/mechanisms means more failures), and the weight.

But, they are still wranglers through and through when off-road. Put them on e-save (forced use of gas + electric) and you will see how much torque you have at your disposal. I owned a 3.6 v6 before my 4xe and the ability to climb/crawl out of situations is much more easier on the 4xe.

Dyno chart for 4xe - ref for how the torque curve compares to a regular 2.0. There is a ton of low end torque (not ecodiesel level, still way more than 2.0 and 3.6)

I like the 4xe as a "hybrid" wrangler.. on pure electric is nothing more than a heavy-ass golf cart with poor BEV efficiency. When you are doing serious off-road assume that you will be using it in hybrid not on only electric.

another good thread to read: https://www.jlwranglerforums.com/fo...nishing-torque-based-on-electric-power.69337/

 

[GrayWolf.Overland]

Does that electric power / torque last through extended trails? E.g. through three days going 22 miles of the Rubicon? I'm guessing it does.

this has been clarified in numerous threads.. its always a hybrid. In trail runs when you have max-regen on, you invariably end up putting more charge into the battery with all the high rpm-slow-movement plus the braking needed to coast downhill sections.

The only time it can truly exhaust out into deficit is when you have a cross country highway trip with minimal braking and endless miles of just driving/towing hard to a point there is no influx of charge coming into the HV-battery. At that point it will go into some green turtle mode throttling down the speed/acceleration etc. There have been several 4xes that went through the Rubicon trail and none reported back getting into turtle mode by the end of it..
several have reported pulling a coolant hose that goes into battery and getting outright stranded ? (easy target for branches and logs) but none are complainig that it went into limp mode.

 

[rickinAZ]

I love my diesel, but if I were to buy a new JL tomorrow, I'd go 4xe. That said, my first choice of potential/future engines would be the I6T.

My only concern is how stressed the 3.0 liter engine is at 510bhp - that's BMW M levels of engine efficiency, and Stellantis ain't BMW when it comes to building straight sixes that will last. Yes, I know there's a 420bhp detuned version that's a more likely candidate for production.

 

[Just Jed]

You know, I have a 21 JLUR, with E-torque, auto start/stop, the whole nine yards, and I love it! 43K so far no issues (hope I’m not hexing myself), love the pop off the line if necessary, and the seamless S/S. Hey, if I’m at a long light, I don’t mind not polluting, or burning $$ Commiefornia gas. Granted, I’m a “soft roader” no crawling, it’s my DD. All that being said, if it’s available , I’d definitely consider the I-6 Hurricane next time.

 

[Willing&Able]

most folks on the forum don't like the 4xe for the complexity (more parts/mechanisms means more failures), and the weight.

But, they are still wranglers through and through when off-road. Put them on e-save (forced use of gas + electric) and you will see how much torque you have at your disposal. I owned a 3.6 v6 before my 4xe and the ability to climb/crawl out of situations is much more easier on the 4xe.

Dyno chart for 4xe - ref for how the torque curve compares to a regular 2.0. There is a ton of low end torque (not ecodiesel level, still way more than 2.0 and 3.6)

I like the 4xe as a "hybrid" wrangler.. on pure electric is nothing more than a heavy-ass golf cart with poor BEV efficiency. When you are doing serious off-road assume that you will be using it in hybrid not on only electric.

another good thread to read: https://www.jlwranglerforums.com/fo...nishing-torque-based-on-electric-power.69337/

No way is that dyno of Wheel Torque according to the labeling of the X axis - that would put the 4xe over 600ft lbs of torque at the engine, depending on dyno.

 

[Willing&Able]

To be sure, the 3.6 Pentastar did not replace the 4.0 inline six. The 4.0 crowd was complaining bitterly about the 3.5 minivan engine in the early JK.

Did Wranglers have a 3.5L? I thought it went from the 4.0L in the TJ (for I6) to a 3.8L 'minivan' engine then kick over to the current 3.6L?

 

[NWJeepr]

The 2.0 is a good engine. I prefer it over the 3.6, and I had a 3.6 for 10 years previously. I prefer the 2.0 for both on and off-road.

The torque of the 2.0 is slightly less at idle than the 3.6, but off idle, 2.0 torque surpasses the V6, and it also peaks and holds high torque output much sooner than the V6. The V6 has to wrap out past 3k. On steep and rocky trails (Mountain West) 1500-2500 is really the sweet spot where I want power and the 2.0 is a rockstar for that. The cooling system keeps up just fine with the turbo.

My 3.6 always felt like a tired dog through a 6-speed (NSG). Wranglers are heavy to get moving from a stop. I was always having to wrap out the 3.6 to keep up with traffic. I don't think Jeeps are particularly "fun" to drive on-road, but the turbo boost makes it feel almost peppy, and a lot lighter than it actually is.

 

[GrayWolf.Overland]

No way is that dyno of Wheel Torque according to the labeling of the X axis - that would put the 4xe over 600ft lbs of torque at the engine, depending on dyno.

The green line is the actual torque. The other two is the split up of what comes from the 2.0 engine and what part comes from the electric motor. On the x axis the green line peaks out near to 500 - which is basically close to the 470lb torque rating of the 4xe.

 

[Willing&Able]

The green line is the actual torque. The other two is the split up of what comes from the 2.0 engine and what part comes from the electric motor. On the x axis the green line peaks out near to 500 - which is basically close to the 470lb torque rating of the 4xe.

I get that piece. I'm just saying it states 'wheel tq' - or at the wheels - on the graph. Companies quote engine hp/tq. With 4WD you will see at least a 25% drivetrain loss and even if dyno'd in R/2WD it would be 20% loss. This would put the 470 engine tq in the 350-375 wheel tq range - nowhere near the 500 wheel tq range in that graph.

Unless that graph is mislabeled, and it is showing 'engine tq'....

 

[GrayWolf.Overland]

I get that piece. I'm just saying it states 'wheel tq' - or at the wheels - on the graph. Companies quote engine hp/tq. With 4WD you will see at least a 25% drivetrain loss and even if dyno'd in R/2WD it would be 20% loss. This would put the 470 engine tq in the 350-375 wheel tq range - nowhere near the 500 wheel tq range in that graph.

Unless that graph is mislabeled, and it is showing 'engine tq'....

not my graph. This was shared on the engine and gearing chart thread as input to updating AnnDee444's gearing calculator.

Could be just a typo on the x axis label - as the 2.0 torque curve matches what we have seen before from other's reportnig their dyno

 

[Powelligator]

Did Wranglers have a 3.5L? I thought it went from the 4.0L in the TJ (for I6) to a 3.8L 'minivan' engine then kick over to the current 3.6L?

Sorry, my bad. The early JK's came with the 3.8 that you mention, I just typed the wrong displacement.

 

[Gunfighter]

3.6 best all round performer.

 

[Mifsuud]

The 4xes on demand power is amazing. Uphill grades are no threat to the torque available. In 4Low it just crawls. Don't immediately poo poo the 4xe simply because it's new or a complicated hybrid system. The combination of old and new technologies in the 4xe is incredible. For a first time producing something like this system it's a big step. I'm sure future systems will improve, but the second and third steps cannot be made without the first.

 

[skipperw]

Owned a few jeep wranglers and for me the ecodiesel beat all other engines hands down. Off road it’s a beast, never a hint of problems. Around 1000 miles off roading it gets 17.5 mpg……. On road with 35” tires and a rhino rack I get 22 mpg. Stop and go deriving 19.5 mpg. i don’t think once this motor comes up to operating temperature, it cares if you run it for 15 minutes or 15 hours. It’s a shame they discontinued it. Thank you climate change nutballs……………

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