I am looking to upgrade my secondary injectors to 720s.
Heard good things about Injector Dynamics and decided to go with them.
It shows they only have sets for FD, Rx-8, and Miata.
If there aren't any 720 ID injectors for the s5 TII what would you suggest I use

 

try calling them. IDs should fit FC more readily than the FD that requires a whole new rail. sometimes shops are just ignorant and aim at the model owners that have more money.

i'm not sure if they have a direct swap in seat base, but they should fit with a little ingenuity and proper length adapter.

 

I believe the problem lies with the fuel injector o-ring size. FC's are 11mm and most FD injectors that have aftermarket top feed rails are 14mm.

Definately your best bet to call them, or contact turblown he is a vendor on this site

https://www.rx7club.com/vendor-classifieds-276/injector-dynamics-968641/


John

 

yes, have to snip off the plastic at the bottom, and install "cushion"
I know on T1's site you can select "2nd gen and 1st gen style"

meanwhile I sold mine because I thought they were wrong, lol

 

most injectors can fit both ways, just the o-ring sizing changes between the 2 rails. i have fit almost all types of top feed injectors into the stock FC rails with the appropriate o-rings.

 

Thank you guys appreciate your info.
I ordered the injectors from Turblown off the link John put in.
He's gonna send me the right o rings and they are supposed to drop right in.