hi, ive been looking to change my s5 tll injectors and i wanted to know if i can put 720cc primary and secondary injectors. could anyone tell me what to do? thanks

 

Is your car modified? How will you control the injectors? Des your engine need all that fuel?
If the answers to those questions is "no", and "i dont know". Then you dont need 720s.
-a

 

Honestly its not a good idea to change the primarys, unless your instantly boosting I wouldn't recommend it. Keep the primarys for the low rpm drivability, you don't want it to rich at that low of an rpm and lose power. Secondarys are a great upgrade, if you need them, they only kick in after a particular rpm point. If you have the stock turbo, you don't, simple as that.

 

id suggest getting 720 for sec use only, and get somehting like a safc to control them, otherwise thay are just spraying more fuel than you need.

 

OOHH!! 720cc injectors and no fuel control?!

r0x0rzzzzzzzzz!!!