MF2 and 2 or 4 Injectors?

[555Subbie]

Hello folks :smile:

I have a question regarding the use of number of injectors. I am building a turbokit on a Subaru Legacy 1990 and bought the great ERL MF2 Fuelmapperkit. I vill use it in conjunction with my existing stock MPFI injection to inject additional fuel at boost... :smile: Now to the question #1. as far i am concerned the engine vill need 500cc/100 Horsepower and i wonder if a should install four injectors or two injectors for smooth function?

Would be glad if someone could give me some hint
Regards
Per :smile: