skriner

hi guys just bought 1994 import it has a HKS Valve Controller fitted what i would like to know is what boost should it be running and what can the tubbie take ,it is set to 0.6 bar on low and 1.2 on high. beleive me this car does shift. i have a 430 bhp skyline GTR and i am inclined to say that the scooby is approaching 300bhp can anyone please shed some light on this set up please.