I have searched but havent found the answer im seeking my friend got a jackson racing charger for his si and got a 4.2 pulley and was wondering how much boost it would give him if the b20 crank pulley was used with it?? thanks for any help

 

someone has to know this

 

The CRV crank pulley gives you 2 to 3 psi additional depending on how tight you like to keep your belts. I use one on my B18C along with a alternator "stepper" pulley. I would suggest just using the stepper pulley for now, Endyn sells them.