Originally Posted by idahoblkss

the thing is that the blower is rated to 68k rpms so you got to be careful how small you go since your OD'd too . i got to find the calculator i was using but i think the smallest you can run would be around a 4" if i remember correctly and that would put the blower at 100% efficiency so your talking over 1200 hp to the fly or more. if i were you i would try the 5" first like i was going to do and see where that puts you . as far as the pulley going with the head unit, im sure we can work it out . and e85 all the way i call it unicorn blood!