General Need your help DSM community

[Refugio]

I have a 1997 gst with
S-AFC a’pexi
720cc injectors
Skyline size intercooler
Supra fuel pump
Fuel pressure gauge that read 48psi
Fuel pressure regulator
3” turbo back exhaust
Adjustable Venom cam gears
Turbo timer
Aem afr gauge
Frank 2 turbo
Tial external waste gate valve
Greaddy bov
Im running 21 psi boost
My question is what fuel ne on my a’pexi S-AFC converter be?

You must be logged in to view this image or video.

You must be logged in to view this image or video.

 

[NOSLO2PT0]

Those injectors are too big to control with just the AFC. in order to get the car to run correctly with those injectors, you have to pull so much fuel out (going negative on the fuel settings), that you will go off the maps with timing advance. About the biggest you can get away with while using just an AFC is 660’s. I’d also turn your base fuel pressure back down to 43psi

 

[Refugio]

Those injectors are too big to control with just the AFC. in order to get the car to run correctly with those injectors, you have to pull so much fuel out (going negative on the fuel settings), that you will go off the maps with timing advance. About the biggest you can get away with while using just an AFC is 660’s. I’d also turn your base fuel pressure back down to 43psi

Thanks you for your help I’ll consider that and you are right in in negative on afc