I am just about to start work on my turbo system and have a choice that I need to make. My setup is the DRAG gen 3 kit on a B18C5 (stock internals), RC 550cc inj, Greddy Profec-B, Missing Link, AEM fuel rail/reg.

Should I go with a S-AFC
or a V-AFC and a boost dependent fuel pressure regulator

 

I dont think it would idle with 550s and safc or vafc. If it does, its gonna idle like **** and your gonna have absolutely no tunablity

 

Here is what i suggest you do. if you know of a shop that has a dyno near you and you or somebody you know is good at tunning here is what you should get. do either a supra or a 20b in tank fuel pump. i have a 20b and it works good. if you have the money buy the hks fcon and piggy back it with the vafc. you will have no problems with the car it will idle like stock. our shop runs the same set up on one of our customers cars however the car is fully built with a full fuel system.