Offering some facts here in regards to your set up.
I apologize in advance if this is anything you didn't wnat ot hear.
*The need for a Dual-feed fuel rail is myth.
*There is no need for the 550s/Supra fuel pump on your set up. Chances are they are hurting your performance by causing you to run richer than you would without them. On your set up, with the OEM pump and the OEM injectors, you would still be running rich.
*The BOV is hurting performance.
See here:
http://jekylandhyde.madpowaz.com/bov.htm
As for time and HP predictions, no one could ever accurately tell you that over the net... yo uneed to go out and run the car.
You only need 250 RWHP (give or take 10) to get into the 12s.
300 RWHP will get you touching the 11s.
Hope this helps. Good luck wiht your car.