after putting my 6 lb pully set up on i noticed a growling noise in the super charger or around it.whats this from?didnt do it before.

 

If you look at the stock crank pulley you will notice it has a rubber isolater that reduces or stops a lot of noise, when you replace the stock pulley with an after market pulley they bolt right to the front of the engine, so you will hear more noise from the blower, its normal, my truck has the same noise.

Larry.