ok guy need a lil help i got a supercharged b18c5 its a 5psi but i want it to 10psi somebody has told me i have to pay 400 hundred to buy a pulley kit but i also heard i could use a b20 crank pulley then wat would i use for the supercharger b the way is a jackson racing supercharger on a b18c5 motor please help me out

 

it's true B20 is the cheaper way to go instead of JR crank pulley
you will see 8 psi
also for you 10 psi goal you will need to change your nose SC pulley

 

Check with Motorvations to see if they make a stepped alternator pulley for your application. Also read through the JRSC thread, it's got a lot of information:

https://honda-tech.com/forums/forced-induction-16/%2A%2A%2A-official-jrsc-thread%2A%2A%2A-1214810/