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"I've seen pics that the connector rods were larger than the PSD's rods."
Yes the 6 cylinder engines rods are bigger than a V8 of similar power, of course one connecting rod on the V8 only has to handle 75% of the load that the six bangers rod does.
I have done alot of research on cummins and powerstroke engines. From everything i have read and researched the cummins does seem to be a better engine. Its unfortunate they got stuck with a dodge truck to stick em in though. There is no comparison between a dodge truck and a ford truck. The only slight advantage dodge has is the cummins.
Isn't the Cummins better able to handle power upgrades then the DuraMax and PSD? I've seen pics that the connector rods were larger than the PSD's rods. Also, are the Cummins easier to work on? All I hear is cab-off for most repairs on a SuperDuty. Than can/will be expensive once the warranty has expired. Don't know much about the GM products. I hate IFS 4x4's.
The cummins conecting rods are bigger IIRC because it ironically, has a longer stroke then the power stroke. Not sure about how easy it would be to work on the cummins, but I imagine fairly, since its a straight 6.
It sucks for dodge though, I believe the 08 trucks to be one of their first really solid platforms, but they are plagued with DPF problems
The cummins conecting rods are bigger IIRC because it ironically, has a longer stroke then the power stroke. Not sure about how easy it would be to work on the cummins, but I imagine fairly, since its a straight 6.
It sucks for dodge though, I believe the 08 trucks to be one of their first really solid platforms, but they are plagued with DPF problems
The stroke is longer and the rods are larger bcause each cylinder must have more displacement because the cummins only has six cylinders instead of eight to do the same work.. The draw back of the long stroke is that it will take longer to wind up while the short stroke engine will zip right on up there. In a gasser the short strokers are always the fast guys but in D its different. I'll bet in the future you will see the dmax and psd with the land speed records and the cummings for the sled pulling records. All engineering. I'm toying with the idea of a cummins three banger in a ford ranger.
Isn't the Cummins better able to handle power upgrades then the DuraMax and PSD? I've seen pics that the connector rods were larger than the PSD's rods. Also, are the Cummins easier to work on? All I hear is cab-off for most repairs on a SuperDuty. Than can/will be expensive once the warranty has expired. Don't know much about the GM products. I hate IFS 4x4's.
The 5.9 was definately better able to handle the power. I dont know if you read diesel power, but look in the latest issue (red ford PSD dually on cover) then go and look at the truck buildups. All the Duramax and Powerstrokes have different rods and pistons other then stock, the all the cummins have stock rods and pistons. If that doesn't tell you something I don't know what will. As for working on, take a look under the hood of either the new 6.7 or the old 5.9 then go take a look under the hood of the 6.4 or the duramax.....
The stroke is longer and the rods are larger bcause each cylinder must have more displacement because the cummins only has six cylinders instead of eight to do the same work.. The draw back of the long stroke is that it will take longer to wind up while the short stroke engine will zip right on up there. In a gasser the short strokers are always the fast guys but in D its different. I'll bet in the future you will see the dmax and psd with the land speed records and the cummings for the sled pulling records. All engineering. I'm toying with the idea of a cummins three banger in a ford ranger.
The differance in stroke is not as significant as some may believe as the 5.9 Cummins stroke is less than .59 inches longer than that of the 6.0 Powerstroke.
That would be nice rmo1. I mean since navistar isnt "ford", then how cool would that to have the motor preference that YOU want, in the best pickup truck!
Yes, it would be nice to match up the Ford with the Cummins motor, but seriously I don't mind pulling with the 6.0 PSD that much at all. I still just prefer to tow with the Ford. I think it's mostly that I like the rest of the Ford truck better. If I had to live with one truck day in and day out it would be the Ford. The Dodges that I find myself in, are fine trucks in their own right, but there's just something about the Ford.
The Cummins motors have more grunt, there's no question, but in some recent pulling trips with our 06 Ford, I didn't find the PSD lacking. You just have to shift it sooner-never it let it fall below 2,000 rpm.
This 6.0 gets significantly better fuel milege than the 6.7's, empty or towing, and at over 40k we havn't had any problems at all-none.
I talked to a guy the other day that puts 120k on a truck a year, almost all pulling. He has over 70k on an 08 PSD already(no problems BTW). He has to buy a new one every year or two. He usually alternates between Ford and Dodge, not even considering GM. He is thinking about going back to Dodge next time, although he feels that the 6.4 is indeed a major improvement over the 6.0. However, he finds his 08 PSD kind of a pig on fuel. I told him that the 6.7 is too. It really is. Were we used to get 12-14 towing with the older 5.9's, the 6.7 gets about 10, doing the same work. Empty milege is okay (probably just as good), but when you put em to work, it's a whole new ball game.
Maybe this a problem with all the 07 and up diesels?
One of the 6.7 loaded Dodges I use, has had the check engine light come on several times. It's always the EGR sensor. They flashed it last time, and I did notice about a 1mpg improvement in mpg's across the board.
Last edited by P51D Mustang; Oct 2, 2007 at 09:34 AM.
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