Last time out I had a Powerdyne, 9lb pulley running 6 psi, and i ran a 12.70 @ 114.51. All i did was dumped the powerdyne cause it broke twice in 500 miles, bought the s trim and ran last night. I ran a 12.20 @ 118.15, im freakin pumped about that, half second/and 4 mph with a blower swap! Hopefully with cooler temps ill bust out an 11. Just figured Id share, and let everyone know Powerdyne sucks... Period!