Quote:
Originally Posted by 100_Percent_Juice
Once you shift doesnt the turbo have to re-spool reguardless? Also if the rich period is between shifts would you ever be able to tell there is a power loss other than in theory or on paper? And just know that im not trying to defend bovs or be a pita, im just trying to explain it to myself I guess.
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With a BPV, the pressurized air in the system is returned to the intake pre-turbo. So for the turbo to respool to the target pressure, it's already got an injection of pressurized air to work with. With a BOV that vents to atmosphere, the turbo has to respool to pressure only with the 1 atm air from the intake.
It's not a lot more spooling with a BOV, but it's there. It's especially noticeable when you're on and off the throttle mid-corner under boost... w/o the recirculating BPV you'll quickly kill off the boost in the system.