Hey guys,
I have done some searching and have achieved nothing but mixed opinions. I have an 04 STi and just purchased an FP 18g with an upgraded turbine housing(7cm to 8cm). I have some other power mods like, header, APS turbo inlet pipe, Cobb uppipe, TBE, Cobb intake, 255lph fuel pump and Accessport for engine management. I have found multiple instances of people running the 20g with stock STi injectors and still have a little bit of head room for saftey precautions while getting pretty good numbers. I understand that tuning is going to be a HUGE factor in how the stock injectors are going to perform. I was just wondering if someone had a similar set up and all of your guy's input would be greatly appreciated.

 

I've heard of people doing it without aftermarket injectors but usually theres something to it. they're usually running meth or have a stock catback, etc. i would definately upgrade them. the injectors on my 05 sti are maxed out on the stock turbo at 16psi

 

I maxed out sti pinks in no time with a td05-18g. Minimum the say for an 18g is like 640cc. I went with some modified stockers from andrewtech flow tested at 857cc and they work perfectly,