Sustained Speeds

[Ted W. Hazen]

What sustained high speeds can one expect and not interfere with the overall longevity of the engine and drive train.

 

[#crnxr]

As far as the engine goes, the Cummins (12V, 24V, ISBe) is designed to be run at maximum rated horsepower RPM for extended periods of time. Run 'em long, run 'em hard. Should be around 2900 rpm for the new common rail design. The biggest obstacle to running too long is high EGT (over 1300* pre-turbo), but that usually isn't a problem until you upgrade the fueling levels. Try the "search" function to find a couple of good posts which explain it with more technical info.



"Engine testing included 22,000 hours on the dynamometer, much of it at full power. " - Joe Donnelly, TDR Issue 43 Pg. 35



-Kyle



*Edit - 2900 max HP RPM from Cummins website

 

[Fireman]

Yeah, but the tires areonly rated for 80-85



Fireman