frst a boost cut/ignition cut at 15 psi ways around it
fiesta rs turbo is ther some sort of boost cut or ignition cut limit of some sort as a m8 of mine whats to turn the bost up on his but says his car holds back at 15psi now if i remember they have a map sensor could he not just buy a 3 bar to fit or is there a unlimitted boost chip that can be bought