New cummins diesel 5.0 L displacement (if it ever arrives)?

[dlmetzger]

The 2009 Dodge Ram 1500 had a sticker that indicated two diesel displacements, 6. 7L and 5. 0L. I was puzzled by this. From several articles (see one here: New Cummins V6 and V8 Diesel Engines - Exclusive Preview - Diesel Power Magazine), Cummins had developed two prototype engines (a 4. 2L V6 & a 5. 6L V8) based on a 90 degree V. They were also going to use a slightly different block material, something called CGI (compacted graphite iron). I can't find the original article, but this is close (new 4. 2 liter Cummins diesel coming to the Jeep line!!! - JeepForum.com). Its suppose to have better strength than cast iron and therefore the CGI engines could be made lighter. This material is also much harder and difficult to machine.



Is it a V8 and a V6? If its a V8, then did they change the material of the V8 from CGI and go back to cast iron and therefore reduced the displacement from 5. 6L to 5. 0L?

 

[Vaughn MacKenzie]

I have been wondering the same thing, I kept tabs on the V-engine development as much as I could going back to 2003 and it was always 4. 2 V6 and 5. 6L V8 like you said. I am hoping it'll be a V8 myself (if indeed it's a 5 liter) but a V6 would be OK.

 

[RShipp]

It is a V8 with 300hp and 500 ft/lb of torque @ 2500rpm. High revving, but should motivate a 1500.

 

[jwgary]

It is a V8 with 300hp and 500 ft/lb of torque @ 2500rpm. High revving, but should motivate a 1500.

Sources

 

[RShipp]

Diesel Power Magazine had a spec sheet on all the small diesel engines that are projected to show up in half ton trucks.

 

[AHarris]

Inline 6

I wish the new motor would have been a small inline 6. To be, that seems an inherently better architecture for a truck engine. Why is Cummins trying to make a diesel perform like gasser and going with the inferior V architecture? If I want a gasser I'll get a gasser!



If Dodge were smart they'd be putting a 4BT into a Dakota... now that would be the perfect truck for me--a Dakota diesel, 4BT, and Crew Cab.



Best diesel truck engine is the 5. 9L Cummins (with the 6. 7L at second place)

Best gas engine for a truck was the Ford 300 inline 6

Best engine ever in a Jeep was the 4. 0L inline 6

Best Chrysler car engine was the 225 slant 6

Best Chevy engine was the 350 V-8 (the one exception) and the 250 inline 6 (those things were indestructible!)

Best German engine (and still made) is the awesome BMW straight six



The V engines might be smoother and perform better, but those 6s last forever if properly maintained. Oo.

 

[RHestand]

Ditto all Yooper67 post.

I would just add.

Best German engineon't forget about the no longer produced Mercedes 300 SL, with the famous, many year race winning, high performance, durable, inline 6.

The 300 SL Gull Wing coupe, is one of my of all time favorite cars.

Regarding diesels: IMO, as produced today, no V-block diesel engines are not as conducive to turbo charging as the inline blocks.

Ray

PS. Also, I would add to the best small block Chev. V/8 engines, the currently produced, all alum. LS engines. Light weight, high revving, high horse power, and durable.

 

[tempforce]

actually if you ever drove a straight eight, you would love those engines. to bad the manufactures discontinued them for the v-8.

 

[LRutigliano]

You forgot to mention best sports car engine...



1962 Jaguar XKE 3. 8L inline 6, 265hp and fastest production car of its time. Most beautiful car and engine !!! The engine was so beautiful, the entire hood tilted so you could see it !! :-laf



I agree with you... put a 4BT in a 1500 or a Dakota/Durango and be done with it... Lots of torque, power and 30mpg and Marco could then make it a screamer with torque management...

 

[Dieselnut59]

I wish the new motor would have been a small inline 6. To be, that seems an inherently better architecture for a truck engine. Why is Cummins trying to make a diesel perform like gasser and going with the inferior V architecture? If I want a gasser I'll get a gasser!



If Dodge were smart they'd be putting a 4BT into a Dakota... now that would be the perfect truck for me--a Dakota diesel, 4BT, and Crew Cab.



Best diesel truck engine is the 5. 9L Cummins (with the 6. 7L at second place)

Best gas engine for a truck was the Ford 300 inline 6

Best engine ever in a Jeep was the 4. 0L inline 6

Best Chrysler car engine was the 225 slant 6

Best Chevy engine was the 350 V-8 (the one exception) and the 250 inline 6 (those things were indestructible!)

Best German engine (and still made) is the awesome BMW straight six



The V engines might be smoother and perform better, but those 6s last forever if properly maintained. Oo.

I just about totally agree with ya Yooper... . but, you left out the Chevrolet equivalent of the Ford 300: the 292 inline 6. You mentioned the Chev 250, which Ford had a match for with the 240. Ford also had the little 200 inline 6. I agree, the best engines are the inline ones. The 3. 0L inline 6 turbo diesel in my '87 Mercedes is a great engine. As you mentioned, the BMW inline 6 engines are awesome. My mother's current car has the 2. 5 inline 6. Her next one will have the 3 liter dual turbo diesel inline 6. Those are badass!!

I do not see why Cummins would not emission certify or whatever the 4. 5L 4 cylinder (the 6. 7 with 2 less pistons, like the 3. 9/5. 9). That would be the ticket for the 1500/Wrangler/Liberty/Grand Cherokee/Commander/Durango/Dakota!

 

[AKaiser]

The biggest reason I can think of for the use of V motors is the fact that you can put it in a tighter space. That's why HMMWVs had V-8s: you can't put an inline 6 in it and keep it low enough for (in that case) concealment. In the case of cars and trucks, it's an aerodynamic issue.

 

[Dieselnut59]

The biggest reason I can think of for the use of V motors is the fact that you can put it in a tighter space. That's why HMMWVs had V-8s: you can't put an inline 6 in it and keep it low enough for (in that case) concealment. In the case of cars and trucks, it's an aerodynamic issue.

Several posts (on here and elsewhere on the net) about people converting "HMMWVs" to Cummins. I believe it is more of the government's "cheap bid" factor than the layout of the engine. The 6. 2 was a cheap engine, in price and quality. It costs more to make a Cummins... . but it is worth it!

In some cases, what you say is right about the "V" design, but if an engineer wants to make an inline engine work, it can be easily done. Look at the Cummins in our trucks and the inline 6 BMW engines. They sit further back under the base of the windshield and length is not an issue there.

I would LOVE a HMMWV with a Cummins! On a more practical note, I would REALLY love a Wrangler with a 3. 9 Cummins!

 

[AKaiser]

Several posts (on here and elsewhere on the net) about people converting "HMMWVs" to Cummins. I believe it is more of the government's "cheap bid" factor than the layout of the engine. The 6. 2 was a cheap engine, in price and quality. It costs more to make a Cummins... . but it is worth it!
In some cases, what you say is right about the "V" design, but if an engineer wants to make an inline engine work, it can be easily done. Look at the Cummins in our trucks and the inline 6 BMW engines. They sit further back under the base of the windshield and length is not an issue there.
I would LOVE a HMMWV with a Cummins! On a more practical note, I would REALLY love a Wrangler with a 3. 9 Cummins!

You're comparing apples to grapes (or was it pommegranates? I forget. )

First, a light duty HMMWV would need a beefed up front suspension to put a cast-iron B motor in it. The unarmored Heavy variants would do well, but they're taller anyway. An M1114 or M1151 Armored variant is maxed out without a load for all practical purposes, so forget putting a B6 in that rig even with it's beefed up suspension.

Second, you're comparing a heavy 5. 9L (4. 02-inch (102. 1 mm) bore and 4. 72-inch (119. 9 mm) stroke) truck engine with a 3L car engine (84mm bore/90mm stroke). That B motor is about 1. 3 times the height of the BMW engine, based on the stroke alone, and right at 1. 25 times it's bore. BMWs tend to have long hoods anyway.

Do I disagree that the I-6 layout is superior: No.

 

[Canadian Cummins]

Ya just got love the I6.
I had a 67 Toyota Land Cruiser, which I rolled and then put a 327 Chevy into it. Great on the highway but lost all the bottom end of the 6 off road. As a side note the tojo 6 was the early Chevy 6, in 1937 I believe the Chevy plant was "Nationalized" and given to Toyota. I even put a Chev distributer in it.
If BMW can find a way to fit an I6 into a "compact" then a company with savy engineers and willing management it can be done.
Just my $0. 02 worth

 

['strokeThis_'07]

No mention of the 2JZ in Toyota Supras? Its like a gasser version of the Cummins; itll hold 1000rwhp on stock internals, just like our favorite diesel!! Its the ONLY Toyota Id by, a Mk. IV turbo

 

[AHarris]

Another great motor from Toyota was the 22R 4 cylinder they used to put in the trucks and 4Runners. Not sure if they are still making a variant of that engine now in their current rigs. Great little motor that had a surprising amount of power and was bulletproof. Had several friends who put 400K+ on them without ever opening up the motor.

The straight 6 Datsun used to put in the old 240Z and 260Z cars was pretty cool too--and smooth--but not sure how well those held up.