Originally Posted by SoCal_Scooby
I believe without a bpv it can hold boost better with high boost numbers, because the boost will start to open it. And i heard its easier to tune without it
I think you might be wrong. I'm not positive though. They make bpv with interchangable springs for full race setups. I think on our cars, it would be dangerous not to purge the unused pressure somehow. I think diesel trucks are the only ones that have No bpv/bov period.