[8psiSi]

if you put a 88-91 crx si super charger on a 92-95 civic si motor.the civ under drive pulley is bigger

 

[8psiSi]

heres the specs

the supercharger made for the 92-95 si civic makes 6psi and the pulley size is 3.8 on the supercharger. on the 88-91 crx si the pulley on the supercharger is 3.4. its because the civic have a bigger under drive pulley so the pulley on the supercharger is bigger.hope this helps.