Lessmore wrote:

Chevies have always been known for outstanding power...all starting back in 1955 with the introduction of the legendary small block Chevy V8. Power and lots of it...has been a bow tie tradition in both gas and diesel engines over the years.

So no....not at all...nope.... I'm not surprised that Chevy came first and Ford was at the tail end.

Some say horse power is horsepower....but in my humble opinion horses are rated differently....there are Shetland horses (blue oval) and then there are Clydesdale's (bow tie).

All I can say...is it is a good thing that the Chevy was 'hobbled' with 3.73's to the Ford's 4.10's....or could you imagine what the Chevy times would of been.

ShinerBock wrote:



My statement agreeing with travelnutz was more of a general statement regarding HP and Torque, and not about the Ike Test.

In regards to the Ike test, I agree that it is a bit of a head scratcher that the Ford had the slowest time with it's power rating. I know that Ford and Cummins use different SAE methods in determining their power ratings so their numbers really should not be seen as apples to apples.

The DPF on the Ford could have been clogged up or creating more back-pressure than the Ram. Another thing I could think that happened would be if the Ford defueled due to high exhaust temps which in turn would lower its power output. To my knowledge, only Ram with its Active Air and GM with its hood scoop have a way of pulling air from the front of the truck which would have an impact on exhaust gas temps.

FishOnOne wrote:


I seriously doubt the Ford defueled as it would have been clearly noticeable, but it is possible it was in regen.

Hannibal wrote:

After owning two trucks with AAM rear axles, I'd take the 15 second penalty and enjoy the ride.

ShinerBock wrote:



There is no noticeable sign of defueling besides less power since the only thing that happens is the injectors inject less fuel. The driver of the truck might notice it depending on the how much the truck is defueling or his experience with the truck, but you would not notice it just by watching a video.

RCMAN46 wrote:

"What most people dont understand is that the two V8's in this test have higher hp ratings that the mighty I6 but they get those numbers through RPM"


Lets take a look at the spes.

Ram 6.7 385 hp @ 2800 rpm
900 ft/lbs @ 1700 rpm

Ford 6.7 440 hp @ 2800 rpm
925 ft/lbs @ 1800 rpm

Duramax 445 hp @2800 rpm
910 ft/lbs @1600 rpm.

If anything I would say the Duramax is able to make the most power across the rpm range with lower rpms than the Ram or Ford.

Interesting all three make the max hp at the same rpm.


"The truck with the flattest power curve and most torque did the poorest..... this really doesn't make sense."

I believe even though not popular belief the Duramax has the flattest power curve of the three.

blofgren wrote:



Wouldn't an indication of this be noticeably less fuel economy than the other trucks? Also I would think if that new of a truck was in regen that soon there must have been something wrong with it.