Thank you!
In the case of your tractor, all you did was throw more fuel to the engine and you got more power. You did not change any of the air flow characteristics of the engine but you made more power. In fact, if you got 20% more power you made a LOT more power! :) And with that power you got a bit more smoke.
A lot of people don't understand that and that there is a HUGE difference between the way a gasoline engine and diesel engine work.
Bottom line pretty much is:
With a gasoline engine it's all about air flow.
With a diesel engine it's all about fuel flow.
That is why tuners on diesels make so much difference. All they have to do is throw more fuel at the engine to make huge power. As you know, you can't do that with gasoline engine because the tuner can't change the air flow characteristics of the engine. With a diesel, we don't worry so much about that.
Diesel power freaks talk about big pumps, higher fuel pressures, big injectors and more fuel.
Gas power freaks talk about big cams, better intakes, headers and things like that. See the trend? :)
