Not necessarily. We don't run as high as the PS, but our SS runs at 9,600. It performed better with the smaller injector/higher fuel pressure set up as does my Stocker that will turn 8,200.Wouldn't that make the case for the larger injector ?
I am not sure why this is the case. Both are sequentially tuned which I feel fades at the higher RPMs, but improves the harmonics on the way up. It may have to do with the higher fuel pressure keeping a more consistent fuel supply to the injectors.