run your bov and vg off the intake manifold not of the turbo. block off the line going from turbo to the mbc from mbc to the vg.
The best setup i have seen working is from the intake mani to the bov t'd off to mbc and from mbc over to the wg. That has proven on few dyno runs i have vitnesed with boos spikes and then after they have moved it over it stabilized. Same thing hapend on mine too.
-E
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