An VAFC Hack is a piggyback fuel computer made by Apex.. Its used to control air/fuel ratio maps and control the engagement and disgagment of vtec.. Im not sure if you can use it a nonvtec car, but maybe you can and just make the vtec controller program obsolete.. Most of the time, ive only heard it to be used for all motor vtec cars.. not turbo.. for a turbo a S-AFC or a AVC-R is what you want for a turbo appilication.. a fmu is okay for low boost below 11psi ish, but the technology is pretty old and it runs too rich.. also it was made for carbs.. its just tossed in with a turbo kit so it makes the turbo kit run and thats about it.. people usually highly suggest a better fuel management than fmu..hopes that helps.. correct me if im wrong too anyone..