to inject more? diesel via ir? utulizzata and also discussed ? to lengthen the duration of the injection to make it burn, you can adjust the right air flow rate to adjust the afr and advance up to a certain point pu? stay gold why? pu? enough for the amount? acceptable pu? give already? pi? performance... if you do not smoke means that it does not c'? production eye-catching of unburned then not c'? reason of forcing the ecu to start injecting before tdc even why? if you do it too burning the pu? begin before the piston is in the position that minimizes the volume in which you generer? the pressure...probably not fighting for? you lose power and ? what happens to you in tractors ( p.s. I like tractors) or in the trucks being able to act only on the pump (diesel-advance), you can't take advantage of other variables that there are in modern engines such as, for example, you can't vary the injection pressure or adjust the turbo... then you don't have egr .. right?