k so i feel again retrted for asking this but what are they, i mean i relize they are for running boost wether from a s.c. or a turbo, but how do they work?

 

blow through is when the boost goes through the carb

draw through is when the carb is on the intake side of the turbo, and the a/f mixture actually goes through the turbo.

hope that helps. most s/c's ive seen for rotaries are draw through