I am planning to have my motor built or possibly buy something already done, no matter what the case is, it will have somewhere in the 400+mark. My question is, I have an ADS superchip in the car(89 Iroc 5.7) how high will I be able to go with the injectors with that chip?

 

your best bet would to be to call around and see who will make a chip for you----in the area or in the NJ/philly area (those areas are breeding grounds for fast car shops).
somebody will make ya one....but you have to be able to fork over the cash.
anyway, go with 30s becasue you plan on a supercharger in the future. but for now, you can just get a fuel pressure regulator and turn down the pressure to where it will be fine. then adjust it when you get that bad-azz 10psi blower.