It seems that the higher power the tune the more smoke that is made. If smoke is unburned fuel, why is this necessary? It seems that is wasted fuel. Is it not possible (with today’s electronic controls) to put in all the fuel that is necessary to make the power and all that can be burned without putting in the excess that makes the smoke, or is it just something with diesel motors that they have to always have excess fuel to make maximum power? Just a curiosity question. I personally would prefer maximum power with very little smoke. Prefer not to call attention to myself any more than necessary, but rather have power with smoke than not have power. How about it all you custom tuners and any other knowledgeable members? Thanks in advance for any and all knowledgeable replies.