I don't know what the hp ratings are for the pw's but the injectors that flow the most fuel for the first gens as far as I know are the Lucas injectors also known as the old blue specials. for the older first gens , (89,90, and possibly some of the 91's) these are the only injectors I know of that will give you more fuel. The older first gens came stock with 9mm injectors and people who tried the PW's noticed a decrease in power. The lucas injectors are marine injectors rated at 300 HP. Unless there is something new on the market that I am not aware of these are your best choice. Do a search on Big Don. He can fix you up with a set of these injectors. Hpoe this helps.
Jim