DETAILS, FICTION AND 471 SUPERCHARGER

What co. and who's the man to speak to over a cam for a bbc,or can any individual advise 1 that works very good for them?   the overall layout of twin-screw superchargers is almost identical to the Roots-type. the sole feature separating the two designs is The form from the rotors. In twin-screw superchargers, among the rotors is male, and the op