Quote Originally Posted by dezldave961 View Post
Dropping pulley size makes it whine louder, usually accompanied by additional supporting mods to do so. The slight improvement of surface finish on the inlet, and removing a wall between the outlet & BBV has essentially no effect in the percent difference of sound changing.

- Dave
Nope. Dropping pulley size might make the blower louder, but only at WOT. Porting the outlet OR sealing up the silencing slits make the blower WAY louder at idle and a little more at WOT. Don't see how you think that it doesn't. I've got video's to prove it...just gotta dig them up if you'd like to compare.