I dont have the perfect answer for you, but yes you do need a lighter spring. I would contact the seller, or Tial and see what spring rates they offer, go on step down. Then it should open up at your boost level.
__________________
MOD List: DiabloSport, PTP Checkvalve, JMB CC, JMB UPP, JMB Ultimate Intake, MaxxFab 3" TBE Duel Tip, MaxxFab 3" O2, FM WGA, AGP BFMIC.
Stock:
216whp 240wtq
Rage-Tek Tune w/Just a DSP (New Tune Coming):
234whp 277wtq
|