I see that you're from the Denver area, which is about a mile up. If the dyno is anywhere near that altitude your car will not put out nearly what a similarly modded car would at sea level. Most of the time instead of showing the actual numbers that the car put down, the dyno software will multiply your HP and torque readings with a number to correct for the altitude. Your car may have actually put out 280 hp to the wheels, but the dyno program will multiply that by a factor to simulate what it would put out at sea level. Many times these "corrections" are very generous.
