well... i think it would be better to place the BOV's near the TB... that way the air flowing inside of the pipes and intercooler is all still moving and ready to surge forward when the BOV closes and the TB opens.

If you place the BOV at the compressor outlet or near it... that means when the throttle closes, the whole column of air inside the Pipes and IC AFTER the bov stalls inside the pipes, and there is a certain amount of resistance that the turbo has to overcome to get that slug of air moving again when the throttle opens and the bov closes... i mean, its proportional to the weight of the air... but still, its inertia that the turbo has to overcome and can easily be alleviated if the Bov was positioned near the TB.

Im fixin to install both my BOV's on my supra by the TB, if that helps any.

Remember: An object in motion tends to stay in motion (air flowing thru your IC and pipes venting right before the TB)

and

An object at rest tends to stay at rest (air stalled inside your IC and pipes due to the BOV venting at the compressor outlet)