Fallstar01

Here is the deal: I want to slow the drag of accessories while maintaining (or slightly increase) the boost of my saleen series IV supercharger. It is currently running with the stock pulley (I believe it is 3.00 inches, 6 rib, 4 bolt design) providing 8psi@5000 RPMs. Before I install the UD pulleys, I need to figure out answers to the following questions:

How small does my supercharger pulley have to be in order to provide the same amount of boost with the steeda Underdrive pulleys?
---How small for a slight increase in boost (1.5 PSI)?
---Does any company sell(or make) this size/type of pulley for a decent price?
---Will I be facing some serious slippage with the reduced size?

Reason I'm asking is because I just bought Steeda UD pulleys.
Thanks for all of your help.
FS

mdvaldosta

Return the UD pulley's

If you go with the smaller crank pulley you will need a smaller s/c pulley, and 3" is already small as it is... you'll likely get belt slip even at only 8psi if you go any smaller.