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Perhaps more knowledgeable will reply but I believe ECM stands for Electronic Control Module.
The Detroit Diesel has a DDEC brain, which is programmed with certain operating parameters. I purchased a DDEC code reader on Ebay, and it's very interesting what kind of information is in that computer. There is indications that there are several "governor" settings which limit performance.
Some of boosting horsepower is simply a change in programming of the DDEC, while others require actual hardware changes. For example, I actually downgraded my engine from 500HP to 450 at the suggestion of a good friend who is regional tech specialist with DD. That change required no hardware, but DD did indicate if I wanted to go lower, it would require injector changes to match.
Ray
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Jim,
I wasn't going to say anything about your ECM, but as long as you let the cat out of the bag have you noticed any additional tire wear from fast starts?
Just be careful because in reverse you can develop excessive torque.
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Additional Horsepower
Jon, I have noticed what appears to be more black on the concrete. With the Tag up I dont notice any difference. I guess the additional weight on the drive axle doesn't allow slippage. I was told by the Technician that did the work for me to start using my "back up beeper" while in reverse. Guess the extra torque is what he was referring to.
