Will 345cc injectors be ok for 7lbs of boost on a GSR or will the duty cycle on those be maxed out?

 

should be ok.. might need to run a bit more fuel pressure. Just be sure to use a walbro 255lph pump.

 

Should be do-able....I'm running 370cc on an LS @ 7psi, and the duty cycle is in the upper 80% range. But i guess it depends on what turbo you are using as well. Just keep a close eye on your duty cycle when being tuned.