Safe continuous RPM ranges when driving Cummins turbo diesel 12v

Discussion in 'Engine and Performance' started by Mpeach1976, Jan 19, 2016.

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  1. Mpeach1976

    Mpeach1976 Junior Member

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    Joined:
    Nov 6, 2015
    Ram Year:
    1995
    Engine:
    Cummins diesel
    When I'm driving my truck (1995 3500 Cummins turbo diesel) on a road trip I'm usually at about 2500 - 2700 RPMs -while the engine red lines at 3000- (I have 4.10 gears...so going 70-75MPH puts me at that RPM range)... Is this safe for the motor or is that consistent RPM range too high? I've never had a problem -knock on wood- but just wanna make sure I'm not sending my CTD to an early grave. Thanks in Advance.
     
  2. NWRQC

    NWRQC Senior Member

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    Ram Year:
    2007
    Engine:
    6.7 Cummins
    While mine is a 24V and a 6.7, I like to keep my RPM at or below 2K on the highway while cruising. 1700-1800 RPM seems to be the happy spot for fuel economy. 2K for me is about 75mph with 33" tires and 3.73 gearing. I couldn't imagine running at 2500-2700 RPM for any extended amount of time.
     
  3. crazzywolfie

    crazzywolfie Senior Member

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    Ram Year:
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    5.2
    i don't think you really got to worry about much. that is why they got governors. i also bet they leave lots of safe room in there. your engine will not blow up at 3000rpm.
     

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