The Top DSM Community on the Web

For 1990-1999 Mitsubishi Eclipse, Eagle Talon, Plymouth Laser, and Galant VR-4 Owners. Log in to remove most ads.

  • Join the Community!

    DSMtuners is a massive archive of DSM information - but more importantly, it's a COMMUNITY! Join in and participate with other DSMers, and invite all of your DSM friends to make this place their home. Chat with others, create a build thread, post questions and answers. Get involved! Logging in will also remove many of the advertisements, along with this notice. ;) It will also allow you to view images in threads.

Please Support Southbay Fuel Injectors
Please Support STM Tuned

General Need your help DSM community

Refugio

Probationary Member
5
2
Sep 13, 2020
Fresno, California
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.
 
Last edited by a moderator:

NOSLO2PT0

Proven Member
2,434
112
Aug 31, 2002
Joliet, Illinois
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

Probationary Member
5
2
Sep 13, 2020
Fresno, California
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
 
Support Vendors who Support the DSM Community
Boosted Fabrication ECM Tuning ExtremePSI Fuel Injector Clinic Jacks Transmissions JNZ Tuning Kiggly Racing Morrison Fabrications MyMitsubishiStore.com Raven Fabrication RixRacing RockAuto RTM Racing STM Tuned VR Speed Factory

Latest posts

Build Thread Updates

Vendor Updates

Latest Classifieds

Top