does anyone know why my engine sounds like its building boost when my a/c is on? it even makes a bov noise when i shift. sounds cool but just curious on why its doing it

 

1995 with 96 5 lug suspension with ST springs and koni shocks (had a 96 layin around so i swapped the suspension) put a 98 sohc engine it it (got for 500 bucks installed with a warranty cant beat that!) i have AEM intake tubeing with k&n filter. other parts. pacesetter header msd coil and ignition.(i know the suspension has nothing to do with the spooling noise im hearing XD) just listin what i have. also have boxer side skirt, boxer rear, octane(r32) front, bullet fenders, and grade a carbon fiber evo hood. original question was, why does my car sound like its making boost when i have the a/c on it? even makes a noise when i shift like a bov.