Originally Posted by cadillackid
On the 360 they said 2700 RPM under load is the max safe and highest longevity for that engine... on my DT-360 it is rated to give me the most HP / TQ at 2300 RPM... im guessing part of that is the cam profile but part of it is probably bumping the injection timing a little more advanced also...
Diesel engines are way different then gas engines.
The power band in a diesel is solely controlled by the injection pump. Granted, you'll have to tailor the turbo and intercooler around it but the camshaft plays such a tiny factor in it that it's not worth mentioning. That's why most of your cam companies list hundreds of different grinds for the chevy small block, yet a lot of them don't even list a camshaft for a diesel, and if they do, it's one or two different grinds and that's it.
Obviously the injection pump(in a mechanical engine) controls the fuel amount and the injection timing. And by doing that it is what creates your torque ratings, torque rise, hp level, governed speed, etc. of the engine.
You can now change all of this stuff with a computer through the ecm on the electronic engines. All without changing the camshaft or cylinder head.
A lot of engines have a fuel economy map available from the factory as to where the engine is most efficient in the power band. As a rule of thumb, it's usually somewhere between 75 and 80% of the max rpm.