[problemhatch]

Both has its advantages. B16 has a nice rod to stroke ratio but has a stock compression of 10.2, which would require some tuning. You would need that anyways to hit 12's. B20 has low compression but not advised to rev high w/ boost(8800 and up).But has the power to hit 12's with proper tuning and a turbo atleast a t3/t4 54 trim and up boosting 12 plus.