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Army, are you referencing a different post where I mention the camshaft configuration affecting the torque and horsepower curves ?
On a diesel engine... due to the almost complete lack of overlap in the valves available due to the overall design.... the max rpms are affected little by camshaft changes.. but the placement in the rpm range of the max torque and horsepower....and the shape of those curves..... can be affected by lobe changes and relationships. The height and shape of the lobes are about all you have to work with on a diesel engine.
The rotators are there for even round wear on the face of the valves... on some of our engines they are provided stock only on the exhaust valves.. but are able to be retrofitted simply by dropping them into place... on the turbo engines they come stock with them on intake and exhaust...
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