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-   -   How do Cummins compare to Duramax and Powerstroke ? (https://www.dieselbombers.com/dodge-truck-cummins-turbo-diesel-forum/41507-how-do-cummins-compare-duramax-powerstroke.html)

2500HeavyDuty 02-10-2010 10:49 PM


Originally Posted by K50 (Post 491711)
Don't forget the Cummins rods need to be 33% larger anyways to make up for the fact that there's 2 less pistons to make the same power with roughly the same displacement.... Not really a fair comparison comparing an I6 to a V8 connecting rod.


well that and also due to the design of the bottom end of the motor they have more main caps 7 of them to be precise, while the v8's have 5.

more main caps you can push the tuck harder cause the bottom end is mechanically built to handle more torque. and if its able to do that, then the cranks throws (connecting rod journals) can be placed out further on the crankshaft mechanically increasing the torque though a simple fulcrum principle. and the other parts have to stand up to the extra demands so on and so forth.


each motor was built for its intended purpose and ratings.

2500HeavyDuty 02-10-2010 10:57 PM


Originally Posted by techneko (Post 492104)
I do believe that cummins is the superior motor of the three, I have a 99' with 259k on it with no problems and seems to just be getting broke in, although I also have 00' powerstroke with 376k on it without a rebuild and is still running strong to my surprise. No mods to either.


every motor should last you a very long time no matter what make, if its maintained right with the right oil at the right intervals you should not have a problems. because there is no metal to metal contact ever if its maintained.

I know on the cummins and the dmax you do have to tear into the valve covers periodically to adjust the valve lash. But on the power stroke they have hydraulic lifters so there is always zero lash and never needs to be adjusted unless there is a serious problem do to the lack of lubrication.

BlueThunder99 02-18-2010 06:12 PM

I LOVE my 2005 DODGE dually 4x4, Its stk including the cat converter, it pulls anything I've ever wanted to, gets great milage, easy to work on, ( you don't have to remove the cab like FORD or be a Contortionist for Chevy ) to get to areas low under the hood, hard to beat, and yes I've owned and worked on all three but DODGE is my favorite:tu: Just my opinion:w2:

cummins_guy 02-19-2010 06:44 AM

Cummins, you get more horsepower with less moving parts (6 cylinder in-line engine)

Chevy, V8 motor (made in tokyo)
Ford, V8 motor, I still have one, 96 ford f350 7.3 International (pain to work on, very tight places, very expensive to get a lot of HP

03dieseldaddy 02-20-2010 09:44 PM

y do almost all the tractors that run wide open there whole life an semi's pull ever mile have inline 6:rocking: if V8 diesels are so great an powerful y arnt they in them. im a ford guy an had a powerstroke for my first diesel an drove many (no power). can't say anything about chevy never pulled with 1 but don't like the motor seen to many go down the track an the manifolds glowing:w2: I rode in a cummins 1 time an 4 months later i had 1 for myself never thought i would ever own a dodge but if ur gonna pull an want to get there faster then ur ford or chevy friends CUMMINS is the way to go. 1 more thing the amount of money u have to put in to get more power is alot less then the rest :tu: (just an opinion)

Rockcrawler 02-20-2010 10:47 PM

yeah get a new ford then you can pull your cab off when you want to work on it.

blkjack 02-20-2010 11:45 PM


Originally Posted by 03dieseldaddy (Post 499740)
y do almost all the tractors that run wide open there whole life an semi's pull ever mile have inline 6:rocking: if V8 diesels are so great an powerful y arnt they in them. im a ford guy an had a powerstroke for my first diesel an drove many (no power). can't say anything about chevy never pulled with 1 but don't like the motor seen to many go down the track an the manifolds glowing:w2: I rode in a cummins 1 time an 4 months later i had 1 for myself never thought i would ever own a dodge but if ur gonna pull an want to get there faster then ur ford or chevy friends CUMMINS is the way to go. 1 more thing the amount of money u have to put in to get more power is alot less then the rest :tu: (just an opinion)

Very nicely put I dont like the whole this is better mine is better game but I think that it is up to the individual as to what they prefer and what they want. For me I have always and always will be a true Chevy fan when it comes to gas engines but for a diesel my preference is always going to be cummins. And as for the Dodge body and ride I like it my dad has an 04 chevy 2500 gasser and I think my Dodge rides every bit as good JMHO :c: :pca1:

2500HeavyDuty 02-21-2010 12:36 AM


Originally Posted by 03dieseldaddy (Post 499740)
y do almost all the tractors that run wide open there whole life an semi's pull ever mile have inline 6:rocking: if V8 diesels are so great an powerful y arnt they in them. 1 more thing the amount of money u have to put in to get more power is alot less then the rest :tu: (just an opinion)


Parts an airflow management.


and with the newer technologies people don't even have to lift a finger to make alot of power with any of the newer diesels, how much power you make depends on something else (ill let you figure out that one for yourself)

Hummin Cummins 02-21-2010 12:54 PM


Originally Posted by K50 (Post 491711)
Don't forget the Cummins rods need to be 33% larger anyways to make up for the fact that there's 2 less pistons to make the same power with roughly the same displacement.... Not really a fair comparison comparing an I6 to a V8 connecting rod.

I don't really under stand this. The way I see it is only 1 piston fires at a time. So if I have a lets say 300 hp 5.9 cummins each cylinder only produces 50 hp?? Wouldn't each cylinder fire have to produce 300 hp because they fire one at a time?:humm:

NadirPoint 02-21-2010 01:14 PM

33% ? 2 less pistons? Fact is, the Cummins parts are comparitively HUGE next to the V8 rods.

Some would use statistics and numbers as a drunk would use a lampost - more for support rather than illumination.


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