i bought a 9" PTC AFTER consulting with them on my combo, and after hearing all the "rave" reviews here. It replaced a 9" Dynamic that was also built for my combo. I lost MPH and ET in the 1/4 with the PTC. The PTC showed almost 11% slip vs 4% for the Dynamic - that data was derived from my QwikData logger, measuring the engine and driveshaft RPM. The Dynamic is back in the car, and the ETs picked back up. My experience and

68 RR 528" INDY MAXX 07 2500 CTD Southwest International Raceway - IHRA - Tucson, AZ