hello

I just got 2 720cc secondary injectors for my s5 tII... just wondering if it would be a good idea to upgrade the secondary fuel rail as well? Also, should i be getting a FPR at this point? I already have a s-afc and a fuel pump.

thanks

matt

 

bump.

 

Did you happen to get greddy 720s? If so I hope you dont have to go what I went through to install them.

 

No need for either.

 

no i got some other high impedance ones... i was gonna get greddys but the low impedance...

can you explain why i dont need either?

thanks
matt

 

can anyone explain? or post ur opinions/suggestions?

 

Well low resistance injectors are supposed to react better/faster than high impedence ones. With 88+ the harness is high impedence so the injectors are high impedence. When upgrading injectors most are low impedence so a resistor must be wired in so that the high impedence harness can "read" the low impedence injector.

 

You're not making enough power to warrant them.

 

at wat HP level should i start worrying about secondary fuel rails and FPR?