So it seems that timing is a questionable thing to have. In small amounts it is a benefit, better MPG, more HP. But as in most things, too much can cause trouble. So the question is of course, how much is too much? It seems that when under extreme loads that require extra fueling the timing boxes are not as useful or needed as just a boost fooler and fuel box. Is this because the timing alone does not allow the turbo to produce the boost needed for all that extra fuel? I have an Edge Comp (no tap yet) and it is only a timing box without the pump tapped, I spoke with Edge about this. They told me that with the pump tapped it is a timing advance and a fueling box and a boost fooler in stages depending upon where you have it set. The Smarty in fuel saver mode is a timing increase but is not to be used to tow for the above reasons. But in the other settings it does provide timing. So I can assume that timing is an advantage in small doses up to the point where the added fuel causes its own advance? Also, is timing advance less of an issue when driving around empty? I guess the RPMs increase enough to allow the designed timing curve to adjust so at higher speeds it is actually retarded? I am starting to see that our engines really have a fine balance point between all these issues depending on what we are willing to accept, power, heat, response, mileage. I am most concerned as I'm sure a lot of you are, with the negative effects that any of these recipes can have on durability, but in moderate doses I don't see that I have anything to worry about. I don't suppose that Marco would be willing to divulge all the details of his software, or that it would really matter too much, but it would be interesting to see the different values that different manufacturers use to achieve certain performance levels. I'm still very much learning and just thought I'd add a few thoughts.