i want to go to ams 680 cc injectors do i need to go get a tune fo rthe car to run properly or will the ecu accomidate for the bigger injectors ie more fuel

 

nope you change injectors you need a tune period. and why go that low waste of money dont go lower then 1000cc

 

is there a reason you want to do this?

do you need more injector?

injectors = new tune as stated

 

just about any changes to a turbo motor will require a tune for the most part. turbo back exhaust, bigger turbo, injectors etc. also if you arent sure of these things you should consider not buying anything or trying to install any new parts until you talk to whoever is going to tune your car. you dont want to end up buying the same parts twice since you didnt have proper guidance on what to buy to achieve your goals.