DD7.3

The PSD has more area under the complete torque-curve. This larger area coupled w/ an automatic transmission w/ 6 gear options, controlled end-to-end with a computer puts it out of performance range for a Cummins. Additionally, the V-design brings substantial advantages, some listed above, but most importantly, it is the reason for the large power band, and the high horsepower out to a higher rpm.

V-diesels are the most optimal engine component design for a light truck, and with the weight savings per horsepower, give's it's host truck the ability to tow best, out-accelerate and out-speed, all of which the Ford does. The 6.0L is substantially improved over the old 7.3 putting out 1/3 more horsepower ... and w/ the smaller engine to boot. Both PSD/Cummins are turbo-charged, but the Ford EVRT design is particularly innovative and better than the Cummins variable geometry design.

The PSD has exhaust gas recirculation, the Cummins does not. Cummins gets around EPA regulations by taking credit on other engine lines.

In all, the PSD has newer technology, newer computer control, more advanced components and a vastly superior automatic transmission (TorqShift), which makes the need for a manual transmission virtually obsolete or a gimmick at best. (Autos out-tow manuals, believe it or not).

That's a summary DD7.3. Read through the 1,000 post PSD most durable thread.

 

On an unrelated not, Marine Ironman, check your PM.

 

I was reading a manfacturers discussion on the topic and they claimed they cost more to build. It didnt seem reasonalble to me. I figured they were cheaper. They specifically said. It is cheaper to build a v6 than an inline.

 

EGR puts dirty exhaust back in the engine. Which is known to be harmful to longevity. Thats something to look forward to.
I also do not believe a v design has higher thermal efficiency. Do you have anything to support this?

 

On the flip side, do you have any information that contradicts his statement?

 

The upfront cost is always more to tool up for a new inline design. Same reason I get ****ed at drivers whp never use blinkers. They spent a million to design and manufacture a tail light and blinkers and they still don't use them!!!

 

Yes. Thermal efficiency is directly related to fuel economy. Inlines get better fuel economy. I wasnt the one that made the claim. One head is more efficient than two.

 

I found this.

 

I don't remember the severe downturn in engine longevity after automobile manufacturers started using EGR systems. Anyone else?
If inlines get better fuel economy, then why didn't the 300 get better than the 302 in the same applications?

 

I may not own a PSD or Cummins BUT, I have driven both and see no advantage from one to the other, I just prefer the Dodge. In the dodge forums we have Ford guys as well but when a Cummins vs. PSD thing starts we still respect the ford guys opinion and don't laugh them right out of the thread. But yeah I have driven both and the Cummins seems more finely tuned than the PSD. A bit smoother on takeoff etc. when I put the power to the ford it vibrated and shook, you could tell the psd was a diesel kinda like the IDIs whereas the Cummins just sounds like a diesel it don't feel like one. Thats my take on it.

 

The reason the Dodge owners get "laughed out of the thread" in this forum is because facts and tests are ignored.

 

They get ignored because the same ones keep getting posted time after time and get really old really fast. That and the fact that the cummins name has been around for years and has earned alot of respect just like cat. If chev had come out with cat like they had tried they would be outselling all others.

 

I guess it would get old fast when the Cummins repeatedly gets proven the lesser engine for a pickup. Oh well, this is a Ford website. Good thing the real facts and repeated testing backs us up.

I'm glad you enjoy the Dodge forums. You won't find me over there because I don't own a Cummins.

 

I wanted to ask your opinion on something else Ironman. I have heard from many people including Powerstroke fanatics that the Cummins responds alot better to modifications and at the same time is considerably cheaper. One Powerstroke owner shared his belief on the "easier and cheaper" so much so that he said it just wasn't as fun as modifying a PSD. I believe he worked at a truck modification shop and he said he knew this from experience. What do you think? Any mods on yours?

 

Check this site out:

http://photos.ford-trucks.com/showphoto.php?photo=10993&papass=&sort=1&thecat=50 0

It says As long as Ford and GM continue to use the V block they must use smaller rods. Is this a disadvantage at all? And are the rods any indication of how heavy the actual crankshaft is going to be?