2016 Silverado 3500 - Ike Gauntlet Pull
Looks like the Chevy still outperforms the Ram on the time up the Gauntlet and more importantly outperforms in exhaust brake performance too. Link
Forum Discussion
transferred wrote:CumminsDriver wrote:
What nobody is comparing here, is that the Duramax and 2015 + Powerstroke engines are allowed by the engine computer to rev much higher during exhaust braking than the Cummins ECM allows. The Cummins will upshift at 3200 to 3300 rpms during exhaust braking if the exhaust brake will not hold the load. The Duramax and 2015+ Powerstroke will be allowed to rev close to or over 4000 rpms for exhaust braking, which may put these trucks in a lower gear than than the Ram. Watch the video again of the 2016 Duramax test and it clearly shows the engine at 3500+ rpms when exhaust braking. I have owned a Ram/Cummins truck and now own the Chevy/Duramax combo. Under 3000 rpms the Cummins exhaust brake works just as well if not better than my current truck. Over 3000 rpm's and that is where the extra pumping of the Duramax engine really makes a difference.
Just my experience with owning both brands of trucks.
Rich
Okay I understand what you're saying, but what is the relevance of what RPM the redine is at? Sure the Cummins has a lower redline but at the end of the day that's a design limitation of the engine and so, unlike using the wrong EB setting, not an error on the tester's part.
I didn't say anything about the engine redline, and you're right, it is a design limitation on the Cummins. The Duramax and Powerstroke are allowed to rev much higher during exhaust braking, which equals to be more exhaust braking power. Being able to rev higher during exhaust braking allows the truck to be in a lower gear for a given speed compared to the Cummins, which is limited to much lower RPM's during those tests. I'd bet that at 3500+ rpms that Duramax was in 3rd gear and had very good braking power. If it was limited to a little over 3000 rpm's for exhaust braking like the Cummins is, it would have been in 4th gear at lower rpm's and wouldn't have been able to hold the trailer back nearly as well, resulting in more brake applications. Different gears can make a difference also, as the Duramax had 3.73's and the Ram had 4.10's.
