4x4ord wrote:
Cummins12V98 wrote:
ShinerBock wrote:
FishOnOne wrote:
Also TFL confirmed that the Adaptive Cruise Control was used on the Ram.
I don't think that was in contention especially since it likely would not kick on due to how slow they were going. The ACC only kicks on the brakes if someone is in front of you going slower than you and I seriously doubt there was someone else going slow enough to force the ACC system to kick on the wheel end brakes the whole way down.
I agree!!! some just can't get over the FACT the CUMMINS EB does the JOB far better than the others. The sad part is there is more weight for the fastest instead of the safest!!!
Depends how you look at it. Even if the Cummins was able to hold the weight back on that grade in second gear you have to realize it was in second gear and only had 1 gear left for steep grades. The Ford was in third gear so if I was going to take a 30,000 lb trailer down a 14 % grade I'd be much more comfortable doing it with the GM or Ford from a safety perspective.
I don't think the torque converter on the Ram(or any truck) locks in 1st gear which is required to engage the exhaust brake.
Although I think the factor of the Ram being in second gear had more to do with the speed they were going. At 35 mph, they would be at 3,000 rpm. The max speed they would be able to go in 2nd would be about 39 mph at 3,400 rpm. Remember, the higher the rpm, the greater the stopping ability that the EB has.
The Ford would be a 2,800 rpm in third at 35 mph, and would be at 3,800 rpm if it shift to 2nd. I don't know the specs on the 6.7L, especially the 2020, so I am not even sure it can go into 2nd at that rpm.
The Ram also had more than enough power to hold back the weight and even kicked on and off so it would likely be able to handle even more weight. I will say that I believe that the reason why the Cummins is able to do this is due to its small restrictive turbo with its low a/r turbine housing which is a choke point and one reason why it is not making as much power as the other two. Add a larger turbo(like I have) to the Cummins and you will be able to make about another 50-75 hp without even adding more fuel.
As I said before, it is a give and take with turbos(even VGT's) and intercooler. You have to decide whether you want top end or low end power, more power in spurts or more sustained power, more power overall or better exhaust brake. This one reason why I say that there is not perfect truck for everyone and which is better may change on everyone's needs/wants our of a truck. So like your truck for the reasons why your bought it, not the reasons why you didn't.