[Lightingrod]

^^Very True^^

I had a Vortech S-trim SC on a 454SS truck. Vortech had used a very small pulley on the supercharger due to size and low rpm of TBI 454 BBC. They had a fitting for a 1/2" breaker-bar on the SC bracket so you could torque the heck out of it! It would still slip. Not with a stock cast crank! I had a custom crank pulley about 1 1/2" dia. larger made so I could also use a larger SC pulley to achieve the same boost level with a lot less belt tension! No more belt slip even when I stepped the boost up about 10%! The pulleys worked great, the 10% increase not so much! It went lean on a real hot day at the strip and I broke a forged piston! A fun setup, more torque than the tires (BFG drag radials) and I knew what to do with!