Cummins 2.8L

Hey guys just throwing out some general discussion.

Cummins has recently developed the R2.8L 4 Cylinder Turbo Diesel.
http://www.4wdmechanix.com/advance-adapters-and-cummins-2-8l-diesel-engine-conversion-for-jeep/

it rates at 267 lb-ft of torque
161 hp and weighs in at 503 lbs

Thoughts on doing a swap into a gen 3? According to Cummins the engine is self contained has its own ecm and is being designed to plug and play already into Nissan and jeep and working towards Toyota.

Think it would be worth it? The potential cost savings on better MPG? Hell the improved low end torque alone seems like a great selling point to me. I have not seen prices yet so who knows how deep in the pockets it would run you but this over a 4BT seems like a great and practical application.

 

I think that engine was shown on a Motortrend Channel show (Dirt Everyday maybe?), swapped into a Jeep. They drove it (literally) into a pond and completely submerged.

 

Yup you nailed it that is the first place I seen it as well. I was over all just super impressed with the size of the whole platform and how well it could be utilized for 4X4 and light truck applications!

 

Would be cool but not for the sake of saving MPG, you'd have to drive 2 million miles before you break even on your ROI

 

Agreed. It would be cool though. I would want some sort of skid plate for the oil pan though. They weren't even doing anything super crazy and managed to bash it open.

 

Financially, it'll probably never be worth it.


This is something you do just because you want to.

 

Ya I agree with the no financial gain to be had. Im sure this will come with an intense price tag. I wonder if it will expand the torque capabilities enough to be worth it? Not to mention there is a little added weight. So other then the torque coming in much earlier the Tacoma V6 already has comparable numbers at nearly 150 pounds less.

2GR-FKS Toyota
Weight: 359lbs (all aluminum block and heads are a huge weight saver)
Tacoma engine specifications are 207 kW (278 hp) at 6000 rpm and 359 N·m (265 lb·ft) at 4600 rpm

 

According to the video, it's a global release ... so this might help the price tag somewhat.

Even with comparable numbers to the 3.5L, the diesel will have low end ... and you'll be able to pass on the hwy to a degree in top gear. Hardly the 2GR-FKS from what I hear.

I would do this in a heart beat once it's proven out.

 

You would do this to a brand new truck? Looking online, the expected price tag for the engine package is $7,000-$8,000.

I'd have a hard time doing that to an old truck. I'd look real hard and finding a junkyard engine first.

 

Let's be honest, it'll be quite a few years before this happens. As much as I drive, I go through vehicles like they are tic-tacs. $7-8k (to start, obviously) for a power train swap is pretty cheap alternative to a new vehicle.

A bolt on supercharger for my truck is $5k, suddenly even twice that doesn't sound so bad for so much more.

I'm going to be outside of warranty inside of a year owning my truck.

 

Given the cost of the engine, plus labor, could you make up the cost in gas savings in your lifetime?

 

I really think this question is unanswerable, but I will give it a shot anyway.

We all pay different rates for diesel, and for me the cost is generally >30% relative to regular octane gasoline. I would likely break even on fuel costs, if that average relationship worked out over time. Diesel is around 30% more efficient, so if my math is right this is a wash if looking only at fuel cost.

The diesel will likely be way more expensive to maintain in the long run due to emissions standards.

 

Depends on how much you drive and what the mileage would actually be with the cummins

 

The 2GR FKS would roast this cummins if starting at 70. Assuming you aren't castrating it by restricting it to low rpms.

 

that's another issue is how long would it take for the fuel savings to make up for it? basically an eternity.... I wonder what the life expectancy is on the cummins engine?

Another interesting fun fact I found on the 2GR our engine is based on was in lexus and other toyotas back in the mid 2000's and won several awards. Seems nice that they are using a time tested block with updated valve train hopefully that all speaks towards longevity and reliability for our 3.5L

 

Of course, gasoline engines are typically better at acceleration anyway. I was more alluding to the incessant shifting that many of the AT owners
complain about on here.

 

Really? Plug-and-play in a modern vehicle made in the last ten years? The ECM would also need to control the transmission and fuel evap system. It also has to play nice with the 4WD, anti-theft, VSC, and instrument cluster computers.

 

Not having seen or work on it in person I can only quote the manufacturer which is stated in the article I posted. Certainly would be monumental to have such a simple conversion!

"The R2.8L four-cylinder inline common rail diesel (electronic injector CRD) is now offered as a “crate engine” for ease of installation. The package includes important details like the ECM, a wiring harness and other “turn-key” features. Run-ready Repower engines are a Cummins specialty, the company sells complete, “crate” powerplants across the globe."

 

Buy a salvaged or Lemon Turd and do it! I've seen at least 4 or 5 get lemoned just from this site, so you know the lemons are out there!

 

You can do a few original fresh engines replacements for the price of the diesel engine alone. Engine swaps never make financial sense.

The diesel might get 10 mpg better than what you have now, the difference in yearly fuel cost isn't all that much. Especially the trouble you go through with the swap.