F350 Super Duty vs 3500 Denali vs The Ike Pulling 30k lbs

4x4ord wrote:
I think it makes sense to increase perfect score to 10 minutes when towing the loads that the dualies are now capable of towing.

It also falls in line with SAE towing standards that have slower speed requirements for DRW pickups.

Huntindog wrote:
In those conditions, it would be difficult to do a comparison, unless they were run side by side..

Another thing stuck out for me.

They said that their new standard was a perfect run is now 10 minutes... IIRC, it used to be 8 minutes. Either the climb has gotten longer, or the speed limit for the test has decreased.

Or was this a one time reduction due to the weather conditions?

They don't say.

As for the concerns about the temps.... Not an issue in these conditions. Run them up in the summer and it will likely be a different story

I would like to see the tranny ratios for each 10 speed tranny as well.

I think it makes sense to increase perfect score to 10 minutes when towing the loads that the dualies are now capable of towing.

link to a thread giving the Ford gear ratios.

With 10 speeds to choose from exact ratios aren't going to make much difference.

Cummins12V98 wrote:

4x4ord wrote:

Cummins12V98 wrote:
Will be nice to see how the measly 400/1000 with 4.10's RAM does with it's ancient outdated 6 speed AISIN.

Very easy to have ZERO brake applications if one chooses running cruise control.

The new Ram has already run up against the Duramax 10 speed towing 16000 lbs. The Ram and GM had identical times of 8:24.


click

m

Not towing 30k.

The interesting thing about the Cummins vs Duramax is that the Duramax makes 445 Hp @ 2800 rpm vs the 400 hp of the Cummins. But as the Duramax pulls down it dramatically looses power. In fact if it were allowed to pull down all the way to 1600 rpm where it makes peak torque it would loose 167 hp. The Cummins on the other hand looses very little hp as the engine slows down. In fact the Cummins only looses 57 hp slowing from 2800 rpm down to 1800 rpm where it makes its peak torque. For this reason the Cummins doesn't need a 10 speed to compete with the Duramax. The Cummins will be putting out more power than the Duramax at rpms below 2250. Above 2250 the higher power of the Duramax starts to come into play.
The Ram's ability to produce power at a lower rpm might allow it to get a little better fuel economy under certain conditions.

Have they run a F-series Super Duty with 7.3L gas towing up Ike yet ?

Cummins12V98 wrote:

4x4ord wrote:

Cummins12V98 wrote:
Will be nice to see how the measly 400/1000 with 4.10's RAM does with it's ancient outdated 6 speed AISIN.

Very easy to have ZERO brake applications if one chooses running cruise control.

The new Ram has already run up against the Duramax 10 speed towing 16000 lbs. The Ram and GM had identical times of 8:24.


click

m

Not towing 30k.

Right. So it will be interesting to see how it handles 30k ... should be similar to the Duramax maybe a little slower.

2001400ex wrote:
I wish they would have posted more information like they did in the past. Like the DB reading going up the hill. There was very little video of either run up the hill. They should discuss how many times the fan clutches engage. The temps up the hill. All relevant information.

That being said, the Ford did a great job pulling.

I also want to see a more relevant test, 15k RV up the hill and see how each performs.

You might find these videos of some interest:


F450 with 30k lbs


F350 SRW towing a 13k Grand Design

4x4ord wrote:

Cummins12V98 wrote:
Will be nice to see how the measly 400/1000 with 4.10's RAM does with it's ancient outdated 6 speed AISIN.

Very easy to have ZERO brake applications if one chooses running cruise control.

The new Ram has already run up against the Duramax 10 speed towing 16000 lbs. The Ram and GM had identical times of 8:24.


click

m

Not towing 30k.

I wish they would have posted more information like they did in the past. Like the DB reading going up the hill. There was very little video of either run up the hill. They should discuss how many times the fan clutches engage. The temps up the hill. All relevant information.

That being said, the Ford did a great job pulling.

I also want to see a more relevant test, 15k RV up the hill and see how each performs.

ksss wrote:
This test seemed a lot more haphazard than what they have done in the past, particularily on the down hill portion. There is no question the Ford dominated the run up the hill. Looks like in this case the Ford actually performed like you would expect given its power advantage. GM clearly is going to have to find some more power to compete with the Ford 6.7 on this test.

The driver's commments on the clutches on the CAT made me laugh. He clearly has no idea what he is talking about.

Ford did dominate the uphill run. The difference in time indicates a 46 horsepower advantage that the Ford has which is a little more than the difference in advertised power ratings.