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I try to type up a lot of my super long block posts these days since I want to point out how a lot of aspects of this car are working together. What it seems like is direct injection gets rid of the poor combustion that a racing cam has, hence better fuel economy due to inherently low volumetric efficiency.
I also think that the torque curve can be drastically modified if we can get a hold of the valve timing system. It doesn't immediately make sense why the torque can be so high at low rpm, where the torque should be the worst, and then dip in the mid range where it should actually be improving. The large amount of overlap+EGR they dial in to improve VE and reduce emissions at the same time at low rpm, full load (apparently, from the 3GR-FSE and 2GR-FSE descriptions) doesn't make much sense to me, but if that strategy can actually produce good torque despite the EGR "poisoning", then there's no reason it wouldn't work even better at midrange where the overlap is less harmful. Right now the max torque curve does not make any sense based on what I know, from a trying to achieve the most torque possible standpoint.
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