Great link about the maximum HP you can run with your stock injectors RTR Performance.
So looking at this formula 92-95 Stock injectors are 240cc divided by 5 = 47HP per injector so 47HP multiplied 4 =188HP
Both the D16z6 and D15B7 have a stock flow rate of 235(cc/min). So they seem to be the same injector.
So the stock injectors are good for upto 192HP more or less, I would say if you running anything more then 170HP i would run better injectors just to make sure you have enough fuel flowing into your cylinder. These numbers are just a overall rating because it there are other factors to consider such as dirty, old or used up injectors which now would be working at less then maximum efficiency.
Here is a list for more Honda injector Flow rates Accordingly Done
Another great link for figuring out the proper injectors. RCENG