I'm thinking of getting a bigger injector like a 42lb. My question is I'm wondering when switching to a bigger injector like this would more than injector size need to be changed in the tune? I like the drivable nature of the factory tune but with the fmu the fuel pressure runs a bit high at 8 psi of boost. I was thinking of getting bigger injectors and dropping the ratio on the fmu.

 

Yeah it may have different turn on times than the stock injectors.