140 wph is feasable with the stock GReddy kit.

For 170whp, you're going to need to turn the boost up. To do that you're going to need to upgrade your fuel system. GReddy gives you the bare minimum to run their kit safely at the stock boost level (~5lbs), so if you go beyond that without touching the fuel system you're going to lean out under boost. GReddy gives you a 12:1 FMU, which works ok with your stock in-tank fuel pump and stock injectors at 4-5lbs of boost, but if you up the boost, you up the fuel pressure needs. Since the FMU is going to need more pressure with the higher boost level, you'll need to add an inline fuel pump if you want to continue using the FMU and stock injector setup, since the stock intank pump can't produce high fuel pressures. The addition of an inline pump should be enough to allow you to run ~8lbs of boost safely.

To get past 200whp, I would ditch the stock injectors and FMU, and step up to larger injectors and possibly a high volume intank pump. If you get injectors that are larger than about 310cc, you'll need an aftermarket fuel controller to run them. Since you're aiming for 200+whp, your tuning will need to be up to the task. The best way to handle it would be to use a standalone engine management system like Hondata, AEM EMS, EFI PMS, Haltech, etc. With one of those, larger injectors, a high-volume intank pump, and good (dyno)tuning, you'll be able to run 10-12lbs of boost safely on stock internals and it should be good for 200+whp. If you don't want to spend the money on a standalone, you can run an AFC, DSM 450cc injectors, and possibly an intank pump, and you should be able to come close to figures you're looking for, at less cost. You won't have as many tuning options, though.