You absolutely, positively, without a shadow of a doubt, DO NOT need to bother with an upgraded fuel pump if you simply upgrade the port injectors and are running on 93 pump gas. There is no amount of power that anyone's turbo system can put out on 93 pump gas that would require more than a set of upgraded port injectors.
Drop in a set of FIC 770cc or DW 700cc injectors and you'll be fine. If your tuner knows what he is doing, he'll set up the right amount of DI/PI as well as a few other parameters in the ROM to allow for the best tune without running out of fuel.
This "need" for an upgraded fuel pump on pump gas probably came from early tuners attempting to run pure PI with their tunes, which is simply crazy. You'll want to keep DI running under boost too, if you like to keep your engine together.
During dyno testing of our turbo system, we've made it to 320whp on our Dyno Dynamics dyno on 93 pump and 400whp on WMI injection using FIC 770cc injectors and an unopened stock fuel assembly/pump. Also, the 50/50 WMI mix did not contribute to 75whp worth of fuel either. I would guess that it would be possible to achieve upwards of 375whp with the stock fuel pump on race gas.
Hope this info helps save people 2-3 hours of labor, fuel on their clothes, and a hundred and something dollars.
- Toan