I have a .5 bar Tial 38mm wastegate installed on my b16a with a t3/t4 turbo(.50a/r comp., .63 turb., .57 trim). The problem is that it never boosts over 6lbs. Pulls like hell and doesn't run bad at all but the wastegate has never opened since i had if so it can't be reaching full boost. Vac. line for it running to vac. mani. t'd off brake booster. Any suggestions or thoughts?