Now I get the point you were making. We had a Cummins in a farm tractor that didn't have the power to do the job we had for it. We phoned Cummins and asked them what could be done to that particular engine to get about a 20% increase in power out of it? they told us the only way we could do it was very expensive ... the camshaft needs to be changed followed by changing all the injectors. We didn't want to spend that kind of money so we turned the mechanical pump up to inject about 20 percent more fuel at full throttle and have been running the tractor like that ever since ,,, it smokes a little pulling up the hills but now it gets its job done.
It could be that if it was smoking all the time we would have saved enough money over the years to pay for the camshaft by following Cummin's recommendation and had the engine running a little more efficient.
