lol, hi gary.
FMIC might be the case, but the exhaust usually pushes the boost up.
my car used to run 10psi with 450x250x60 fmic, pod, and exhaust, with no controller/bleed valve/etc. at all
mid/low 13's is pretty achievable in a R33 with the usual mods, you just need to work on your launches. my first (and subsequently last launch of the night, and the car) resulted in wheel spin all the way through first and second gear.