OK, I was running these times with mud tires and probobally an extra 150-250lbs in there also. Also it was not the same outside temp etc. Like mentioned before the first time I ran records were broke so it was a good day for racing. But about the "at least 15 hp" claim I don't really think so (but it sounds mean going down the track WOT). The interceptor could be used more efficiantly on the track by turning up line preasure, but I wanted to see the everyday driving change. The Supercharger is getting installed tommorrow, I'm sure that will make a differance