Attention: TDR Forum Junkies 
Is it possible to increase the horsepower on my Cummins Marine engine?
Engine Modifications are possible, and acceptable if certain requirements are met, however, a modification fee will usually apply. Engine modification fees are based on the price difference in the two engine models. Their purpose is to recover any revenue lost by Cummins when the ¡°before¡± model was sold instead of the ¡°after¡± model. If an engine modification is performed that is not to an acceptable Cummins specification, or does not conform to applicable emissions standards, the engine will have no warranty. Failures caused by incorrect modifications are not covered by Cummins. This is because Cummins sells horsepower and the price of a higher rated engine will be greater.
Engine modifications are acceptable if all of the following conditions are met:
The modification is made by a Cummins approved repair location.
Equipment components can accommodate the change.
The modification is acceptable for the proposed application.
The parts, timing, or engine ratings listed in the engine CPL are not changed.
The engine meets government emissions standards for the original engine, and the engine data plate is updated with the modified engine data.
Engine modification Form 1877 is submitted with the repair order listing parts used.
Engine modification fees are paid.
http://www.cummins.com/na/pages/en/....cfm?uuid=000437D4-B419-1985-BF7380C4A8F0FDE0
I know it says marine engines but is this the reason they get so mad if the engine is modified for greater HP? Mechanically the engine has to be capable, pay the fee, and (reflash) and you have more HP.
Engine Modifications are possible, and acceptable if certain requirements are met, however, a modification fee will usually apply. Engine modification fees are based on the price difference in the two engine models. Their purpose is to recover any revenue lost by Cummins when the ¡°before¡± model was sold instead of the ¡°after¡± model. If an engine modification is performed that is not to an acceptable Cummins specification, or does not conform to applicable emissions standards, the engine will have no warranty. Failures caused by incorrect modifications are not covered by Cummins. This is because Cummins sells horsepower and the price of a higher rated engine will be greater.
Engine modifications are acceptable if all of the following conditions are met:
The modification is made by a Cummins approved repair location.
Equipment components can accommodate the change.
The modification is acceptable for the proposed application.
The parts, timing, or engine ratings listed in the engine CPL are not changed.
The engine meets government emissions standards for the original engine, and the engine data plate is updated with the modified engine data.
Engine modification Form 1877 is submitted with the repair order listing parts used.
Engine modification fees are paid.
http://www.cummins.com/na/pages/en/....cfm?uuid=000437D4-B419-1985-BF7380C4A8F0FDE0
I know it says marine engines but is this the reason they get so mad if the engine is modified for greater HP? Mechanically the engine has to be capable, pay the fee, and (reflash) and you have more HP.
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