crank pulley

[novi306]

if i were to change my crank pulley to a 8 inch , what is the difference in the non-underdrive pulley and the underdrive pulley , which would have more clearance with the stock water pump? Will i need to change my water pump or what? I see on superchargersonline they sell both or they have a pulley package with supercharger pulley also for about $35 more with a 3.00 head unit pulley and a 8 inch crank pulley. I usually try and shift about 5800 , would that put me about the limmit of the 1000 ? (about 54000, i think with a 8 inch crank and a 3.00 pulley?) what would be my best bet on this? Just thinking of some winter upgrades. thanks , Rich

[DSBLK93GT]

if i were to change my crank pulley to a 8 inch , what is the difference in the non-underdrive pulley and the underdrive pulley , which would have more clearance with the stock water pump? Will i need to change my water pump or what? I see on superchargersonline they sell both or they have a pulley package with supercharger pulley also for about $35 more with a 3.00 head unit pulley and a 8 inch crank pulley. I usually try and shift about 5800 , would that put me about the limmit of the 1000 ? (about 54000, i think with a 8 inch crank and a 3.00 pulley?) what would be my best bet on this? Just thinking of some winter upgrades. thanks , Rich

You would have more clearance with the underdrive one. Soemone else probably knows the best pulley combo though...

[novi306]

so as i am trying to check on this pulley , am i seeing that what i need is to stay around about 50,000 rpm on the head unit? do i need about maximum at what rpm i shift at or a little after ?