Are they standard injectors? If so they will not do 400rwhp, about 300rwhp is the limit at standard rail pressures
WMI should not be used to increase fueling capacity, doesnt work like that
GTX3076 is capable of 500+rwhp on the right fuel nad engine, but slightly laggier than the regular GT3076 which will do just shy of 500rwhp on the right fuel/engine