I thought i already proved the stock pump was weak. The Walbro 255 was able to hold higher fuel pressure in the top of 3rd.

The main thing i keep saying is you have to realize the stock fpr/filter will ALWAYS limit the fuel pressure to 54-60psi. This is why the boost-a-pump as well as the Walbro 255 are limited...the fpr bleeds off the extra pressure.

A return style allows for the pressure to be raised but at the expense of having too much fuel in the midrange rpms. As ive stated before we need the ability to tune ourselves. But im not gonna hold my breath on that one.

Now what would happen if you had bigger injectors but the same fuel pressure, could you get by w/o having a return style? You would still need your tuner to scale the injectors to the ecu...and you might need more than one map...once again, self-tuning is the answer.