I carry a variety of EV6 type fuel injectors to cover a spread of engine combos.
(4) 48# upto 300 crank HP
(4) 60# upto 350 crank HP
Check out the ID1000 for high HP applications upto 600 crank HP N/A at standard fuel pressure
ID1000 upto 450 crank HP Turbo at standard fuel pressure
For turbo applications the rule of thumb is to pick the next larger size for the same HP as you will usually be running a lower AFR.
There numbers are for Gasoline.