The fan included with the 1FZ supercharger kit is actually a 3.0 V6 truck fan circa 1988-92. It has 6 blades instead of the 7 that are on the original fan. The reason for the fan blade switch is radiator-to-fanblade clearance. The installation requires a spacer go between the water pump hub and the fan clutch in order to clear the blower drive belt and tensioner assembly. If the origial fan is re-used, the blade tips deflect at speed and they chew up the radiator The 3.0 fan is further away from the radiator and the ring around the edge keeps the blades from deflecting.
I believe that this fan actually moves less air than the original. The only way to retain the original fan would be to significantly modify the radiator core support to move the radiator forward.
I'm parched
I believe that this fan actually moves less air than the original. The only way to retain the original fan would be to significantly modify the radiator core support to move the radiator forward.
I'm parched