n54 arm vacuum adapter

mm0720

New Member
Apr 30, 2024
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Recently installed the arm vacuum adapter, noticing some flutter before the textbook wooshing that comes with a tial q. Happens at various points of throttle. Hitting target boost of 16psi but only ~7.8-8.2 vacuum. this is consistent with the numbers i’ve had before install of chargepipe + bov + vacuum adapter.
any ideas would be appreciated, currently leaning towards a vacuum leak. worth mentioning that boost/vacuum were measured through mhd, as of right now i have no physical tapped boost gauge. Would love to hear if others using ARM over VS or BMS have had this issue in the past.