you want a walbro 255 and 330 can be used, but your duty cycle will be unhealthy for those injectors.
at stock fuel pressures:
240cc=180whp ish (high 100's)
310cc=210whp ish (low 200's)
330cc=220whp ish (low 200's)
450cc=275whp ish (high 200's)

duty cycles will be pretty high especially if your fuel system/electrical is in anyway compromised. you can stretch smaller injectors by upping the fuel pressure, but when you figure the cost of buying an adj fpr and pressure gauge you could've done the right way by buying new injectors.

200 tuned daily on a y8 is no problem depending on turbo.