I vent to atmosphere, oh yes I do.
I think car runs better, or it runs the same but now goes WHOOSH
Between shifts. The recirculating type takes all the joy out of it for me, all the glory.
With the T3, Im back in boost right after I hit the gear, There is no kinda lag with this turbo and a vented BOV. Plus it makes that great sound.
I do not encounter a stumble either, I run HKS SSQV, it opens and closes FAST, I dont even think the system realizes air loss since it opens and closes so quick, so surge either.
WHOOSH.