most likely a no brainer... but i'm assuming you've already tried a smaller pulley? (though too small and you will need a custom idler pulley to keep enough of a belt wrap on the sc pulley to make the psi)
we're spinning the blower at its Max, Vortech has said their pulleys that bump up PSI are designed for their kits, not custom made kits. IE. Mustang Kits, Focus kits, etc.. They cannot say that this pulley will produce this PSI on this blower if its not their designed kit. Using their calculator on their website, I've entered the pulley size, crank pulley size, redline RPM and as calculated previously, we're only getting 8 PSI max.
Thanks for the replies guys, I'm pretty much seeing who has gone from SC to Turbo..
I went from s/c to turbo, not really b/c I had to have turbo, but it was cheaper power for the money compared to another s/c upgrade. I really like the the two different power delivery feels though. If I had to do over again, I really don't know what I'd pick. If I could actually have the same power level with an s/c for around the same price, I'd probably......well.........the turbo kick is hard to beat, but the constant pull of the s/c was also very satisfying :>)