Ram 2500 CTD and GM 2500 Dmax up the Ike.
Pretty much a nonevent for both. I wish they would start towing 11-14k 5th wheels up the Ike in these tests. The wind resistance on those would make these trucks struggle a lot more. Ram 2500...
Forum Discussion
Bionic Man wrote:
If the standard output Cummins was able to maintain speed, wouldn't it be reasonable to assume that the HO Cummins would use a similar amount of fuel, as it would not need to make more power to do the same speed?
Honestly I'm surprised these trucks are able to do those speeds up the hill. My 350/800 Cummins won't pull my 12,000 pound 5er eastbound to the tunnel at the speed limit. I'm somewhere between 35-40 MPH at the very top. My best friend's 2013 PSD pulling a very similar trailer is the exact same. Does the higher profile of the RV really make that much of a difference?
The standard output Cummins has a 17% higher compression ratio than the high output Cummins which should correlate to greater efficiency. And yes, the wind resistance of the higher profile does make that much of a difference which is why said they should start towing 5vers up the Ike instead to make these trucks really work hard.
