no...
you have a pressure spike when you snap the throttle closed. if you take the pressure source from between the turbo and the throttle plate, the pressure will build up on the backside of the BOV diaphragm, making it resistant to lifting and relieving the pressure.
You stall or surge the compressor.
When you tap the manifold plenum on the side between the intake valves and the throttle body, when you snap throttle closed, you get a very high manifold vacuum spike. This spike lifts the BOV open quicker to vent that pressure in front of the T/B...
you have a pressure spike when you snap the throttle closed. if you take the pressure source from between the turbo and the throttle plate, the pressure will build up on the backside of the BOV diaphragm, making it resistant to lifting and relieving the pressure.
You stall or surge the compressor.
When you tap the manifold plenum on the side between the intake valves and the throttle body, when you snap throttle closed, you get a very high manifold vacuum spike. This spike lifts the BOV open quicker to vent that pressure in front of the T/B...