its past the blower efficency, atleast eatons, the whipple 3.4 and the kb 2.6/8 can handle over 30 psi
there is a guy running a 3.4 whipple at 35 psi, on a mildy built motor(pistons) and he put out like 816 hp and like 900 lb tq 
its past the blower efficency, atleast eatons, the whipple 3.4 and the kb 2.6/8 can handle over 30 psi
there is a guy running a 3.4 whipple at 35 psi, on a mildy built motor(pistons) and he put out like 816 hp and like 900 lb tq