2020 Freightliner vs 3500 GMC Dually at the Ike
Interesting outcome... Trailer: 18,500 lbs GMC Engine: 6.6 Duramax Brake Applications: 1 Time: 10:28 Freightliner Engine: 9.0 Cummins Brake Applications: 0 Time: 10:42 Link
Forum Discussion
4x4ord wrote:Me Again wrote:4x4ord wrote:
^^^^ Maybe. Anything I have driven with an engine brake had position 1 2 or 3 and was either off or on. No modulating.
Lots of RPMs left to be in 3rd and hold back a much larger load at 50MPH.
I don't know where the redline is on the 9l. On a larger diesel engine I wouldn't want to see it rev much over 2100 rpm. The loads I tow I seldom see the jake operating above 1800 rpm. If the Allison behind that 9l dropped to 3rd the engine would rev to 2800 rpm which might be ok?
The max rpm of the ISL (or L9 now) varies depending on application from 1,900-2,200 rpm. Most on highway high horsepower applications are governed at 2,200 rpm.
