Cummins 2.8 actually in an 80

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I'm still waiting to here about someone actually running one of these in an 80 with a good tune.
 
Still curious about the isf 3.8 getting added to the re-power program. 400+ ft-lbs of torque. Meets same Euro emissions specs that meet or exceed EPA tier 4.

However, the overseas reliability of these engines seems to be an issue. Moving manufacturing back the US would be a big plus......however expect to pay 25-30% more.
 
Do you know the difference in the dimensions between the two engines?

Obviously length is not a problem for the 4 cylinder diesels, but they are wider than the inline six toyota engines.

For example the AC compressor does not fit in the stock location on an R2.8 when installed in an 80 series chassis.

I would expect the 3.8 is even larger but I could be wrong, but I agree the extra power would be nice!
 
Do you know the difference in the dimensions between the two engines?

Obviously length is not a problem for the 4 cylinder diesels, but they are wider than the inline six toyota engines.

For example the AC compressor does not fit in the stock location on an R2.8 when installed in an 80 series chassis.

I would expect the 3.8 is even larger but I could be wrong, but I agree the extra power would be nice!

The 3.8 is 28 1/2" wide whereas the 2.8 is 26" wide.

Both are within a couple inches height of a 1fzfe......and way shorter.
 
We had 3 rigs with the 2.8 on this years ultimate adventure, a TJ, a stretched JK and the Range Rover....I'd say the rover and stretched JK were both in the same ballpark as far as weight as an 80. Cummins Steve did a new tune on all 3 just before the trip and bumped the power/torque numbers and I was nothing but impressed with them. While I sucked down gas at an alarming rate with a TBI350, these were very good on diesel, easily doubling my milage! It's on my short list for my next build!
 
23 mpg in an 80 makes the 2.8 a great touring motor - nearly doubling the 80's range from gas engines. But can it run lower quality diesel, as one might encounter touring in Mexico? Anyone know?
 
We had 3 rigs with the 2.8 on this years ultimate adventure, a TJ, a stretched JK and the Range Rover....I'd say the rover and stretched JK were both in the same ballpark as far as weight as an 80. Cummins Steve did a new tune on all 3 just before the trip and bumped the power/torque numbers and I was nothing but impressed with them. While I sucked down gas at an alarming rate with a TBI350, these were very good on diesel, easily doubling my milage! It's on my short list for my next build!

I look at one every day in our shop, we are putting it in a M37, I think the R2.8 is junk, I run a 5.9 in my cruiser, and if I did not have such a fat foot, I would get 22-23 mpg, but I am happy with the 20mpg . These chinese motors look like crap, with a plastic oil pan looking for that rock, or the crappy looking chain driven cam, I do not see these pushing it 50k miles before it starts s***ting the bed. JMHO I would not buy one
 
From the pictures I found on google, it looks like the isf 3.8 mounts the AC compressor much higher than on the R2.8. That would help greatly for fitment.

The extra width of the R2.8 does create some difficulties for making motor mounts, especially if you are seeking a no chassis welding solution.

I agree on the plastic oil pan comments, not impressive at all.

How is the diesel fuel in México?
 
WTF is a "Cummings"?

It's what they call a sexually satisfied Lemming.

lemming.webp
 
23 mpg in an 80 makes the 2.8 a great touring motor - nearly doubling the 80's range from gas engines. But can it run lower quality diesel, as one might encounter touring in Mexico? Anyone know?
I get 18mpg with my 5.3 LS motor with taking it somewhat easy(staying in the slow lanes at times, blasting past a few people in the fast lane and doing 80 for a while, then backing off and hanging out in the slow lane again all on the highway going up and down mountain passes). If I took it easy 20mpg would be attainable Im pretty sure, and some mud guys with LS motors have reported 21mpg but they must be really taking it easy. Takes quite a while to go through a tank of gas now.
 
I get 18mpg with my 5.3 LS motor with taking it somewhat easy(staying in the slow lanes at times, blasting past a few people in the fast lane and doing 80 for a while, then backing off and hanging out in the slow lane again all on the highway going up and down mountain passes). If I took it easy 20mpg would be attainable Im pretty sure, and some mud guys with LS motors have reported 21mpg but they must be really taking it easy. Takes quite a while to go through a tank of gas now.
People stating mpg numbers should probably say what tire sizes and gearing they got.
 
You'll never make the money back on fuel savings but when you are low-speed off road, diesels will absolutely demolish gas engines from an economy perspective.

I remember reading about some of the long-range trips that groups on this site would take in Alaska, they would require gas vehicles to carry 2x the fuel that the diesels did.
 

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