To be honest, its actually the stupidest idea I think Ive ever heard. (no hard feelings against you brother)
A supercharger always puts out the same boost levels, So a boost controller/waste gate is absolutely useless. Heres an example : Your car puts out 9 PSI at 7200RPM, You set could set your boost controller to 12 psi, I can tell you it will still make 9 psi lol.
But yes a pulley will give you more power, of coarse right!
But the wastegate/boost controller is not needed.
__________________
|