i'm in need of limiting my boost from my sc14 charger on my hilux 4y-c to around 4psi (plenty for what i need it for) any ideas??, will a boost controller (manual) work this low psi?? I currently have two bosch blow off/bypass valves fitted and plumbed to manifold vaccum port. any higher than 3-4psi and my car starts blowing fuel out past accelerator pump. plan on later going injection so dont want to spends up big just want to get it running.