02 PSD torque curve

[Texas Diesel]

Anyone know where I can see a torque curve for a 02 PSD? TIA

 

[Texas Diesel]

thanks

 

[RobG]

I recently did a "comparo" of the torque curves between the big three diesels... Cummins, Dura-What, and PSD (6. 0). Here's what I found out:



Dura-What



- Torque peaks at 1800 RPM, stays there until 2100, drops a little and levels off again until 3000, and then drops off from there.



PSD



- Torque peaks at 2000 RPM, then immediately drops off steadily to around 3000 RPm where it totally falls off.



Cummins



- Torque peaks at 1400 RPM, then stays there until 2800-2900 RPM and then drops off.





I wonder how many pro-V8-diesel types even know this?



Rob

 

[RustyJC]

The Cummins torque curve is artificially flattened by the ECM. Effectively, it's "derated" across its powerband to the stock 505 lb-ft, 555 lb-ft or whatever is applicable to a given model because of DaimlerChrysler specs (protecting their downstream components for warranty purposes). If you look at the torque curve of the 2002 HO with the Edge EZ, maximum torque goes up to (as I recall) around 640-650 lb-ft @ 2100 RPM, then drops from there. That's really more reflective of the "natural" torque curve of the engine.



Rusty