turbo opinions
 

im wondering how much flow is needed to hit 400+ hp on a 12a... ive been looking at alot of stuff and dont want to go insanely large, been looking at this turbo and others(due to price and availability) but im unsure about the hotside

BW airwerks S256
will flow 60 lbs a min
Wheel Dimensions: Compressor: 55.8 mm inducer, 76.2 mm exducer, with exclusive Extended Tip Technology.
Turbine: 69.6 mm inducer, 61.5 mm exducer.
Housing A/R: Turbine: 1.22, with 'T4-style', divided entry, and 4.21" v-band discharge.

opinions on a direction are greatly appreciated